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58-22-0

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58-22-0 Usage

Chemical Properties

White crystalline powder with no aroma. Its melting point is 155℃, specific rotary power is [α]24D+109° (4%, ethanol), and its ethanol solution has the greatest absorbance at a wavelength of 240nm. It is easily soluble in ethanol (1:5), soluble in ether (1:100), and insoluble in water. LD50 (Large mice, venal transfusion) 326mg/kg. Studies show that it has latent carcinogenic effects on test animals.

Indications and Uses

Testosterone is the main natural male sex hormone in mammals and is a steroid hormone with 19 carbon atoms. It is the main male sex hormone secreted by the testes, and it is also the most active male sex hormone. It promotes humans’ and animals’ sex organ and secondary sex characteristic development, sperm maturation, and protein metabolism for muscle strengthening. Testosterone controls the growth and development of male sex organs and male secondary sex characteristics. It is mainly used in replacement therapy for eunuchism, treatment for male menopause syndrome, and treatment for impotence, and it is also used in biochemical research.

Pharmacokinetics

Testosterone can bind non-specifically with plasma albumins in blood, and it can also bind with plasma sex hormone binding globulins. It can be converted into estradiol and estrone in peripheral tissue. Testosterone is mostly degraded in the liver, where its A-ring is restored, and it is converted into 17- ketosteroid under the effects of 17β-Hydroxysteroid dehydrogenase. Along with androsterone, epiandrosterone, and etiocholanlone, it is combined with glucuronic acid or sulfate and excreted in urine. Most metabolites in urine that are excreted by binding to glucuronic acid belong to 17-ketosteroids.

Application in Particular Diseases

In Osteoporosis: Testosterone replacement is not FDA approved for the prevention or treatment of osteoporosis. It should not be used solely for these indications but might be beneficial to reduce bone loss in patients needing therapy for hypogonadal symptoms. In a few studies, women receiving oral methyltestosterone 1.25 or 2.5 mg daily or testosterone implants 50 mg every 3 months had increased BMD. Various salt forms of testosterone were associated with increased BMD in some studies of hypogonadal men or senior men with normal hormone levels or mild hormonal deficiency. Transdermal gel, oral, intramuscular, and pellet testosterone products are available. Patients using them should be evaluated within 1 to 2 months of initiation and then every 3 to 6 months thereafter.

Description

Different sources of media describe the Description of 58-22-0 differently. You can refer to the following data:
1. Testosterone (Item No.15645) is an analytical reference material categorized as an anabolic androgenic steroid. Testosterone is an endogenous metabolite of androstenedione (Item Nos. ISO60161 | 15874) and estradiol (Item Nos. ISO60155 | 10006315). Anabolic steroids, including testosterone, have been used to enhance physical performance in athletes. Testosterone is regulated as a Schedule III compound in the United States. This product is intended for research and forensic applications.
2. Testosterone (CRM) (Item No. ISO60154) is a certified reference material categorized as an anabolic androgenic steroid. Testosterone is an endogenous metabolite of androstenedione (Item Nos. ISO60161 | 15874) and estradiol (Item Nos. ISO60155 | 10006315). Anabolic steroids, including testosterone, have been used to enhance physical performance in athletes. Testosterone is regulated as a Schedule III compound in the United States. This product is intended for research and forensic applications.

Uses

Different sources of media describe the Uses of 58-22-0 differently. You can refer to the following data:
1. Testosterone secreted by the testis is converted to dihydrotestosterone in the target tissues where it appears to mediate many of the biological actions of testosterone. Androgens direct the development of the male phenotype during embryogenesis and at puberty.
2. androgen, antineoplastic
3. Testosterone, Principal hormone of the testes, produced by the interstitial cells. Major circulating androgen; converted by 5α-reductase in androgen-dependent target tissues to 5α-dehydrotestosterone which is required for normal male sexual differentiation. Also converted by aromatization to Estradiol. Testerone is a controlled substance (anabolic steroid). Androgen.
4. Secreted by the testis and is converted to dihydrotestosterone in the target tissue where is appears to mediate many of the biological actions of testosterone. CONTROLLED SUBSTANC

Definition

ChEBI: An androstanoid having 17beta-hydroxy and 3-oxo groups, together with unsaturation at C-41C-5..

General Description

Testosterone, 17β-hydroxyandrost-4-en-3-one, is a naturally occurring androgen in men. Inwomen, it mainly serves as a biosynthetic precursor to estradiolbut also has other hormonal effects. It is rapidly metabolizedto relatively inactive 17-ones, however,preventing significant oral activity. Testosterone is availablein a transdermal delivery system (patch), a gel formulation, abuccal system, and as implantable pellets.

Health Hazard

Controls secondary male sex characteristics Maintains functional competence of male reproductive ducts and glands Increases protein anabolism; maintains spermatogenesis; inhibits follotropin Increases male sex behavior; increases closure of epiphyseal plates

Biological Activity

Endogenous androgen receptor agonist.

Biochem/physiol Actions

Testosterone secreted by the testis is converted to dihydrotestosterone in the target tissues where it appears to mediate many of the biological actions of testosterone. Androgens direct the development of the male phenotype during embryogenesis and at puberty.

Safety Profile

Confirmed carcinogen with experimental neoplastigenic and teratogenic data. Poison by intraperitoneal route. Human teratogenic effects by unspecified route: developmental abnormalities of the urogenital system. Experimental reproductive effects. Human mutation data reported. Workers engaged in manufacture and packagmg have shown effects from this hormone, e.g., enlargement of the breasts in male workers. A promoter. When heated to decomposition it emits acrid smoke and irritating fumes. Used as a drug for the treatment of hypogonadism and metastatic breast cancer.

Synthesis

Testosterone, 17β-hydroxyandrost-4-ene-3-one (29.1.5), is made in a number of ways from different substances, including cholesterol, although it is most often made from androstenolone acetate. In order to do this, the keto-group at C17 of the steroid system of androstenolone acetate is reduced to a hydroxyl group by either sodium borohydride, lithium aluminum hydride, or hydrogen over Raney nickel, all of which result in a 17β-hydroxy compound. In the given example, reduction by sodium borohydride or hydrogen over Raney nickel leads to the formation of 3β-acetoxy-5-androsten-17β-ol (29.1.1). The hydroxyl group resulting from reduction then undergoes acylation by benzoyl chloride in pyridine, which forms a diester (29.1.2). After that, taking into consideration the differences in the acidic region of the two ester groups present in the molecule as well as the long-known fact that 17-hydroxy-group ester derivatives are harder to hydrolyze than 3-hydroxy-group ester derivatives, the acetyl protection of the hydroxyl group at C3 is removed by selective hydrolysis using potassium hydroxide in ethanol, and the resulting alcohol (29.1.3) is oxidized to a ketone (29.1.4) by aluminum isopropylate in the presence of cyclohexanone as a hydrogen acceptor, during which isomerization of the double bond from position C5–C6 to C4–C5 simultaneously takes place. Subsequent hydrolysis of the remaining ester region of the molecule using an alkali gives the desired testosterone (29.1.5) . When necessary to convert this into the corresponding ester (propionate, enantate, cypionate, and a few other testosterone esters), the necessary acylation can be accomplished.

Purification Methods

Crystallise testosterone from aqueous acetone, hexane or isoPrOH. The long needles that separated from EtOH/AcOH were used for X-ray crystallography [Roberts et al. J Chem Soc Perkin Trans II 1978 1973.] The acetate [1045-69-8] crystallises from MeOH or aqueous Me2CO, with m 140-141o and [] D 20 +87.8o (c 1, EtOH). [Ruzicka et al. Helv Chim Acta 18 1478 1935 and 19 99, 842 1936, Beilstein 8 IV 974.]

Check Digit Verification of cas no

The CAS Registry Mumber 58-22-0 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 5 and 8 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 58-22:
(4*5)+(3*8)+(2*2)+(1*2)=50
50 % 10 = 0
So 58-22-0 is a valid CAS Registry Number.
InChI:InChI=1/C19H28O2/c1-18-9-7-13(20)11-12(18)3-4-14-15-5-6-17(21)19(15,2)10-8-16(14)18/h11,14-17,21H,3-10H2,1-2H3/t14?,15?,16?,17-,18-,19-/m0/s1

58-22-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name Testosterone

1.2 Other means of identification

Product number -
Other names AndroGel

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:58-22-0 SDS

58-22-0Synthetic route

17β-<(t-butyldimethylsilyl)oxy>androst-4-en-3-one
57711-43-0

17β-<(t-butyldimethylsilyl)oxy>androst-4-en-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With aniline-terephthalaldehyde resin p-toluenesulfonic acid salt In methanol at 20℃; for 32h;100%
With high p-toluenesulfonate content diphenylamine and terephthalaldehyde resin In methanol at 20℃; for 32h;100%
With water; 2,3-dicyano-5,6-dichloro-p-benzoquinone In acetonitrile for 7h; Ambient temperature;92%
With lithium tetrafluoroborate In dichloromethane; acetonitrile78%
(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-17-((tetrahydrofuran-2-yl)oxy)-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
4126-29-8

(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-17-((tetrahydrofuran-2-yl)oxy)-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With toluene-4-sulfonic acid In ethanol for 1h; Ambient temperature;100%
3,3-(ethylenedioxy)-5-androsten-17β-ol
975-57-5

3,3-(ethylenedioxy)-5-androsten-17β-ol

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With sulfuric acid; water; silica gel In toluene for 0.5h;98%
With hydrogenchloride In methanol at 20℃; for 1h;94%
With silica gel; copper(II) sulfate In chloroform for 3h; Heating;82%
Edukt 1: aus Androst-4-en-3,17-dion;
Multi-step reaction with 5 steps
1: 90 percent / CrO3*(pyridine)2 / CH2Cl2 / 12 h / Ambient temperature
2: 1.) diisopropylamine, n-BuLi / 1.) THF, -78 deg C, 15 min
3: LiAlH4 / diethyl ether / 2 h / -15 °C
4: p-toluenesulfonic acid / acetone / 2 h / Heating
5: 39 percent / triphenyltin hydride / toluene / 2 h / Heating
View Scheme
(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-17-((triethylsilyl)oxy)-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
61014-73-1

(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-17-((triethylsilyl)oxy)-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With aniline-terephthalaldehyde resin p-toluenesulfonic acid salt In methanol at 20℃; for 0.25h;98%
With water; 2,3-dicyano-5,6-dichloro-p-benzoquinone In tetrahydrofuran for 1h; Ambient temperature;95%
With high p-toluenesulfonate content diphenylamine and terephthalaldehyde resin In methanol at 20℃; for 0.25h;90%
17β-(methoxymethoxy)androst-4-en-3-one
26341-28-6

17β-(methoxymethoxy)androst-4-en-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With boron trifluoride diethyl etherate; ethanethiol In dichloromethane for 0.5h; Ambient temperature;96%
testosterone acetate
1045-69-8

testosterone acetate

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With copper dichloride In methanol; water for 20h; Heating;95%
With bis(tri-n-butyltin)oxide In toluene at 110℃; for 27h;59%
With potassium hydroxide
17β-(2'-tetrahydropyranyloxy)androst-4-en-3-one
516-63-2

17β-(2'-tetrahydropyranyloxy)androst-4-en-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
bis(trimethylsilyl)sulphate In methanol; 1,2-dichloro-ethane for 1h; Ambient temperature;95%
With aniline-terephthalaldehyde resin p-toluenesulfonic acid salt In methanol at 20℃; for 8h;92%
With high p-toluenesulfonate content diphenylamine and terephthalaldehyde resin In methanol at 20℃; for 3h;90%
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In methanol; water for 7h; Ambient temperature;87%
17β-hydroxy-4ξ,5-oxido-5ξ-androstan-3-one
51154-10-0

17β-hydroxy-4ξ,5-oxido-5ξ-androstan-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With Amberlyst 15; sodium iodide In acetone at 20℃; for 6h; deoxygenation;95%
17β-benzyloxy-testosterone
20860-15-5

17β-benzyloxy-testosterone

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With dimethylsulfide; boron trifluoride diethyl etherate In dichloromethane at 30℃; for 19h;94.4%
Multi-step reaction with 2 steps
1: 84.5 percent / EtSH, boron trifluoride etherate / CH2Cl2 / 18 h / 30 °C
2: 83.3 percent / 5percent HCl / H2O; acetone / 1 h / Ambient temperature
View Scheme
Multi-step reaction with 2 steps
1: 84.5 percent / boron trifluoride etherate / CH2Cl2 / 18 h / 30 °C
2: 83.3 percent / 5percent HCl / H2O; acetone / 1 h / Ambient temperature
View Scheme
Androstenedione
63-05-8

Androstenedione

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With zygowilliopsis sp. WY7905 In aq. phosphate buffer at 30℃; for 24h; pH=8; Enzymatic reaction; stereoselective reaction;93%
With potassium borohydride In tetrahydrofuran; dichloromethane; water at -10 - -5℃; Temperature;93%
With Trichoderma virens In ethanol at 24℃; for 96h; Microbiological reaction;60%
testosterone triflate
159949-15-2

testosterone triflate

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With 18-crown-6 ether; cesium acetate In benzene for 2h; Product distribution; Heating;92%
Conditions
ConditionsYield
With palladium 10% on activated carbon; ammonium formate In butan-1-ol at 113 - 116℃; for 8h; Inert atmosphere;91.9%
17β-(3-methyl-2-butenyloxy)androst-4-en-3-one

17β-(3-methyl-2-butenyloxy)androst-4-en-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In dichloromethane; water at 20℃; for 0.75h;89%
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In dichloromethane for 0.75h;89%
17β-hydroxy-4β,5-epoxy-5β-androstan-3-one
2189-83-5

17β-hydroxy-4β,5-epoxy-5β-androstan-3-one

A

testosterone
58-22-0

testosterone

B

5β,17β-dihydroxyandrostan-3-one
121145-41-3

5β,17β-dihydroxyandrostan-3-one

Conditions
ConditionsYield
With acetic acid; sodium phenylseleno(triethyl)borate In ethanol at 20℃; for 0.166667h; Reduction; dehydration;A 6%
B 88%
4-androstenediol
1156-92-9

4-androstenediol

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With 3,5-dimethyl-1H-pyrazole; pyridinium chlorochromate In dichloromethane at 2 - 3℃; for 0.5h;87%
With trimethylamine-N-oxide; CHDFe-(CO)3 In acetone at 20℃; for 10h;76%
With C10H16NO5; potassium carbonate; bis-[(trifluoroacetoxy)iodo]benzene In dichloromethane at -15℃; for 4h; chemoselective reaction;85%Spectr.
testosterone 2-(prenyloxymethyl)benzoate
850848-14-5

testosterone 2-(prenyloxymethyl)benzoate

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
Stage #1: testosterone 2-(prenyloxymethyl)benzoate With 2,3-dicyano-5,6-dichloro-p-benzoquinone In dichloromethane; water at 20℃; for 6h;
Stage #2: With ytterbium(III) triflate In dichloromethane at 20℃; for 3h;
87%
Multi-step reaction with 2 steps
1: DDQ / CH2Cl2; H2O / 6 h / 20 °C
2: Yb(OTf)3*H2O / CH2Cl2 / 7 h / 20 °C
View Scheme
17β-methoxy-4-androsten-3-one
13990-32-4

17β-methoxy-4-androsten-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With aluminium trichloride; sodium iodide In acetonitrile for 5h; Ambient temperature;86%
(+)-(8R,9S,10R,13S,14S,17S)-17-t-Butoxy-4-androsten-3-one
1852-99-9

(+)-(8R,9S,10R,13S,14S,17S)-17-t-Butoxy-4-androsten-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With trifluoroacetic acid86%
With trifluoroacetic acid for 1.16667h; Ambient temperature;86%
17β-benzyloxy-testosterone
20860-15-5

17β-benzyloxy-testosterone

A

testosterone
58-22-0

testosterone

B

(8R,9S,10R,13S,14S,17S)-3-Ethylsulfanyl-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol
77503-09-4

(8R,9S,10R,13S,14S,17S)-3-Ethylsulfanyl-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol

Conditions
ConditionsYield
With boron trifluoride diethyl etherate; ethanethiol In dichloromethane at 30℃; for 18h;A 11.2%
B 84.5%
17β-benzyloxy-testosterone
20860-15-5

17β-benzyloxy-testosterone

ethanethiol
75-08-1

ethanethiol

A

testosterone
58-22-0

testosterone

B

(8R,9S,10R,13S,14S,17S)-3-Ethylsulfanyl-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol
77503-09-4

(8R,9S,10R,13S,14S,17S)-3-Ethylsulfanyl-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol

Conditions
ConditionsYield
With boron trifluoride diethyl etherate In dichloromethane at 30℃; for 18h;A 11.2%
B 84.5%
(8R,9S,10R,13S,14S,17S)-3-Ethylsulfanyl-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol
77503-09-4

(8R,9S,10R,13S,14S,17S)-3-Ethylsulfanyl-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With hydrogenchloride In water; acetone for 1h; Ambient temperature;83.3%
(8R,9S,10R,13S,14S)-3-Ethoxy-10,13-dimethyl-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
26614-48-2

(8R,9S,10R,13S,14S)-3-Ethoxy-10,13-dimethyl-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With trifluoroacetic acid In ethanol at 40 - 45℃; Reagent/catalyst; Solvent; Green chemistry;82.8%
(8R,9S,10R,13S,14S,17R)-3-Methoxy-10,13-dimethyl-17-((E)-3-trimethylsilanyl-allyl)-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
74137-34-1

(8R,9S,10R,13S,14S,17R)-3-Methoxy-10,13-dimethyl-17-((E)-3-trimethylsilanyl-allyl)-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol

A

testosterone
58-22-0

testosterone

B

17β-hydroxy-17α-(trimethylsilylprop-2-enyl)androst-4-en-3-one
74137-32-9

17β-hydroxy-17α-(trimethylsilylprop-2-enyl)androst-4-en-3-one

Conditions
ConditionsYield
With acidA 1%
B 82%
(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[α]phenanthrene-3,17-diol
81176-75-2

(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[α]phenanthrene-3,17-diol

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With nitrobenzene; palladium on activated charcoal In acetonitrile at 80℃; for 72h;82%
With tert.-butylhydroperoxide; Rh2(Msip)4; sodium hydrogencarbonate In dichloromethane; water at 40℃; for 24h; Sealed tube; chemoselective reaction;78%
des-A-17β-t-butyldimethylsilyloxy-10-(3',3'-dioxyethylene butyl)androstan-5-one

des-A-17β-t-butyldimethylsilyloxy-10-(3',3'-dioxyethylene butyl)androstan-5-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With hydrogenchloride In 1,4-dioxane for 5h; Heating;77.86%
Androstenedione
63-05-8

Androstenedione

A

testosterone
58-22-0

testosterone

B

(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[α]phenanthrene-3,17-diol
81176-75-2

(8R,9S,10R,13S,14S,17S)-10,13-dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[α]phenanthrene-3,17-diol

Conditions
ConditionsYield
With sodium tetrahydroborate In diethyl ether at 20℃; for 2h;A 70%
B 30%
(8R,9S,10R,13S,14S,17S)-6-[1,3]Dithian-2-yl-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-3-one
79761-67-4

(8R,9S,10R,13S,14S,17S)-6-[1,3]Dithian-2-yl-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-3-one

testosterone
58-22-0

testosterone

Conditions
ConditionsYield
With W-2 Raney nickel In acetone at 20℃; for 4h;60%
3-oxo-androst-4-en-17β-yl Se-phenyl selenocarbonate
76920-41-7

3-oxo-androst-4-en-17β-yl Se-phenyl selenocarbonate

A

testosterone
58-22-0

testosterone

B

4-androsten-3-one
2872-90-4

4-androsten-3-one

C

3-oxo-androst-4-en-17β-yl-methyl formate
3129-42-8

3-oxo-androst-4-en-17β-yl-methyl formate

Conditions
ConditionsYield
With 2,2'-azobis(isobutyronitrile); tri-n-butyl-tin hydride In benzene at 80℃;A 29%
B 7%
C 59%
With 2,2'-azobis(isobutyronitrile); tri-n-butyl-tin hydride In xylene at 144℃;A 23%
B 54%
C 21%
testosterone heptanoate
315-37-7

testosterone heptanoate

A

testosterone
58-22-0

testosterone

B

Androstenedione
63-05-8

Androstenedione

Conditions
ConditionsYield
With Fusarium fujikuroi PTCC 5144 In ethanol; water at 26℃; for 312h; Reagent/catalyst; Microbiological reaction;A 20%
B 17%
C 59%
testosterone
58-22-0

testosterone

Androstenedione
63-05-8

Androstenedione

Conditions
ConditionsYield
With Jones reagent In acetone at 0℃; Jones Oxidation;100%
With oxygen; nitrosonium tetrafluoroborate In dichloromethane at 20℃; for 4h;99%
With N-chloro-succinimide; dodecyl methyl sulfide; triethylamine In toluene at -40℃; for 16h; Corey-Kim oxidation;97%
testosterone
58-22-0

testosterone

acetic anhydride
108-24-7

acetic anhydride

testosterone acetate
1045-69-8

testosterone acetate

Conditions
ConditionsYield
With pyridine; dmap at 20℃; for 24h; Inert atmosphere;100%
With pyridine at 0 - 20℃;99%
With copper(II) bis(trifluoromethanesulfonate) In dichloromethane at 20℃; for 3h;92%
3,4-dihydro-2H-pyran
110-87-2

3,4-dihydro-2H-pyran

testosterone
58-22-0

testosterone

17β-(2'-tetrahydropyranyloxy)androst-4-en-3-one
516-63-2

17β-(2'-tetrahydropyranyloxy)androst-4-en-3-one

Conditions
ConditionsYield
bis(trimethylsilyl)sulphate In dichloromethane; 1,2-dichloro-ethane at 0℃; for 0.333333h;100%
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In dichloromethane for 6h; Ambient temperature;100%
With aniline-terephthalaldehyde resin p-toluenesulfonic acid salt In acetonitrile at 20℃; for 24h;100%
testosterone
58-22-0

testosterone

acetic anhydride
108-24-7

acetic anhydride

(17β)-androsta-3,5-diene-3,17-diol diacetate
123880-21-7

(17β)-androsta-3,5-diene-3,17-diol diacetate

Conditions
ConditionsYield
With chloro-trimethyl-silane; sodium iodide100%
testosterone
58-22-0

testosterone

tert-butyldimethylsilyl chloride
18162-48-6

tert-butyldimethylsilyl chloride

17β-<(t-butyldimethylsilyl)oxy>androst-4-en-3-one
57711-43-0

17β-<(t-butyldimethylsilyl)oxy>androst-4-en-3-one

Conditions
ConditionsYield
N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide for 1.5h; Ambient temperature;100%
With 1H-imidazole In N,N-dimethyl-formamide at 20℃; for 18h;95%
With 1H-imidazole In N,N-dimethyl-formamide for 18h; Ambient temperature;93%
monochloromethanesulfonyl chloride
3518-65-8

monochloromethanesulfonyl chloride

testosterone
58-22-0

testosterone

Chloro-methanesulfonic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester
182243-71-6

Chloro-methanesulfonic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester

Conditions
ConditionsYield
With pyridine at 0 - 20℃; for 0.25h;100%
With pyridine at 0℃; Substitution;
testosterone
58-22-0

testosterone

androst-4-en-17β-ol-3-one-[2,2,4,6,6-D5]
21002-80-2

androst-4-en-17β-ol-3-one-[2,2,4,6,6-D5]

Conditions
ConditionsYield
With [D]-sodium hydroxide; deuteromethanol; water-d2 at 120℃; for 0.0166667h; Inert atmosphere; Microwave irradiation;100%
testosterone
58-22-0

testosterone

trimethyl-[2-oxo-2-[[rac-(1S)-5-[(2-aminooxyacetyl)amino]-1-[(2-methyltetrazol-5-yl)methylcarbamoyl]pentyl]amino]ethyl]ammonium 2,2,2-trifluoroacetic acid salt

trimethyl-[2-oxo-2-[[rac-(1S)-5-[(2-aminooxyacetyl)amino]-1-[(2-methyltetrazol-5-yl)methylcarbamoyl]pentyl]amino]ethyl]ammonium 2,2,2-trifluoroacetic acid salt

C35H58N9O5(1+)

C35H58N9O5(1+)

Conditions
ConditionsYield
With acetic acid In methanol at 45℃; for 2h;100%
testosterone
58-22-0

testosterone

trans-4-butylcyclohexane carboxylic acid
71101-89-8

trans-4-butylcyclohexane carboxylic acid

A

testosterone ester

testosterone ester

B

testosterone trans-4-n-butylcyclohexanecarboxylate
105165-22-8

testosterone trans-4-n-butylcyclohexanecarboxylate

Conditions
ConditionsYield
With trifluoroacetic anhydride In ethanol; dichloromethane; waterA n/a
B 99.1%
testosterone
58-22-0

testosterone

2-oxocyclopentane-1-carboxylic acid
50882-16-1

2-oxocyclopentane-1-carboxylic acid

17-(5-Oxocyclopentylcarbonyloxy)-Δ4-androstene-3-one
134512-90-6

17-(5-Oxocyclopentylcarbonyloxy)-Δ4-androstene-3-one

Conditions
ConditionsYield
With dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 0℃;99%
testosterone
58-22-0

testosterone

O-(3-carboxy-propyl)hydroxylamine hydrochloride
3106-67-0

O-(3-carboxy-propyl)hydroxylamine hydrochloride

4-[(8R,9S,10R,13S,14S,17S)-17-Hydroxy-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-(3Z)-ylideneaminooxy]-butyric acid

4-[(8R,9S,10R,13S,14S,17S)-17-Hydroxy-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-(3Z)-ylideneaminooxy]-butyric acid

Conditions
ConditionsYield
With pyridine at 60℃; for 2.5h;99%
testosterone
58-22-0

testosterone

(2S,3S,4S)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-2-methyl-6-phenylsulfanyl-tetrahydro-pyran

(2S,3S,4S)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-2-methyl-6-phenylsulfanyl-tetrahydro-pyran

(8R,9S,10R,13S,14S,17S)-17-[(4S,5S,6S)-4,5-Bis-(tert-butyl-dimethyl-silanyloxy)-6-methyl-tetrahydro-pyran-2-yloxy]-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-3-one

(8R,9S,10R,13S,14S,17S)-17-[(4S,5S,6S)-4,5-Bis-(tert-butyl-dimethyl-silanyloxy)-6-methyl-tetrahydro-pyran-2-yloxy]-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-3-one

Conditions
ConditionsYield
Stage #1: testosterone; (2S,3S,4S)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-2-methyl-6-phenylsulfanyl-tetrahydro-pyran With 4 A molecular sieve; Selectfluor In acetonitrile at 0℃;
Stage #2: With Amberlyst A-21 In acetonitrile
Stage #3: With trimethylammoniomethyl-polymer borohydride In isopropyl alcohol at 20℃;
99%
testosterone
58-22-0

testosterone

testololactone
4416-57-3

testololactone

Conditions
ConditionsYield
With Penicillium notatum KCH 904 In water; acetone at 27℃; for 72h; Enzymatic reaction;98%
With Aspergillus tamarii MRC 72400 In N,N-dimethyl-formamide at 24℃; for 120h; Baeyer-Villiger oxidation; Microbiological reaction;58%
With Aspergillus oryzae
Multi-step reaction with 2 steps
1: Penicillium simplicissimum WY134-2; Tween 80 / aq. buffer / 24 h / 30 °C / pH 8 / Enzymatic reaction
2: aq. buffer / 24 h / 40 °C / pH 1
View Scheme
With penicillium vinaceum AM110 for 48h; Enzymatic reaction;100 %Chromat.
testosterone
58-22-0

testosterone

testolactone
968-93-4

testolactone

Conditions
ConditionsYield
With Fusarium oxysporum SC1301 In dimethyl sulfoxide at 30℃; for 15h;98%
With cultures of cylindrocarpone radicola
testosterone
58-22-0

testosterone

methanesulfonyl chloride
124-63-0

methanesulfonyl chloride

Methanesulfonic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester

Methanesulfonic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester

Conditions
ConditionsYield
With pyridine at 0 - 20℃; for 1h;98%
With pyridine at 0℃; Substitution;
testosterone
58-22-0

testosterone

acetyl chloride
75-36-5

acetyl chloride

testosterone acetate
1045-69-8

testosterone acetate

Conditions
ConditionsYield
With potassium fluoride on basic alumina In toluene for 2.5h;98%
With pyridine; acetic anhydride for 4h; Reflux;96%
With immobilized p-toluenesulfonic acid polymer bound macroporous In neat (no solvent) at 100℃; for 0.0416667h; Microwave irradiation; Sealed tube; Green chemistry;33%
With pyridine; acetic anhydride for 4h; Reflux;
testosterone
58-22-0

testosterone

thiophenyl 2-deoxy-3,4,6-tri-O-acetyl-D-glucopyranoside
151767-37-2

thiophenyl 2-deoxy-3,4,6-tri-O-acetyl-D-glucopyranoside

Acetic acid (2R,3S,4R)-3-acetoxy-2-acetoxymethyl-6-((8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yloxy)-tetrahydro-pyran-4-yl ester

Acetic acid (2R,3S,4R)-3-acetoxy-2-acetoxymethyl-6-((8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yloxy)-tetrahydro-pyran-4-yl ester

Conditions
ConditionsYield
Stage #1: testosterone; thiophenyl 2-deoxy-3,4,6-tri-O-acetyl-D-glucopyranoside With 4 A molecular sieve; Selectfluor In acetonitrile at 0℃;
Stage #2: With Amberlyst A-21 In acetonitrile
Stage #3: With trimethylammoniomethyl-polymer borohydride In isopropyl alcohol at 20℃;
98%
testosterone
58-22-0

testosterone

chloromethyl methyl ether
107-30-2

chloromethyl methyl ether

17β-(methoxymethoxy)androst-4-en-3-one
26341-28-6

17β-(methoxymethoxy)androst-4-en-3-one

Conditions
ConditionsYield
With dmap; N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; for 14h;98%
testosterone
58-22-0

testosterone

acetyl 4-O-benzoyl-3-O-tert-butyldimethylsilyl-2,6-dideoxy-2-iodo-α-D-manno-hexopyranose
381727-32-8

acetyl 4-O-benzoyl-3-O-tert-butyldimethylsilyl-2,6-dideoxy-2-iodo-α-D-manno-hexopyranose

testosteryl 4-O-benzoyl-3-O-tert-butyldimethylsilyl-2,6-dideoxy-2-iodo-α-D-manno-hexopyranoside

testosteryl 4-O-benzoyl-3-O-tert-butyldimethylsilyl-2,6-dideoxy-2-iodo-α-D-manno-hexopyranoside

Conditions
ConditionsYield
With polystyrene-bound silyl triflate In diethyl ether at -50℃; for 3h;97.1%
testosterone
58-22-0

testosterone

Nα-<1,2-bis(p-methoxyphenyl)butyl>-α-aminoacetohydrazide
77579-59-0

Nα-<1,2-bis(p-methoxyphenyl)butyl>-α-aminoacetohydrazide

[1,2-Bis-(4-methoxy-phenyl)-butylamino]-acetic acid [(8R,9S,10R,13S,14S,17S)-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-(3E)-ylidene]-hydrazide
77579-63-6

[1,2-Bis-(4-methoxy-phenyl)-butylamino]-acetic acid [(8R,9S,10R,13S,14S,17S)-17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-(3E)-ylidene]-hydrazide

Conditions
ConditionsYield
With acetic acid In ethanol Heating;97%
trimethylsilyl formate
18243-21-5

trimethylsilyl formate

testosterone
58-22-0

testosterone

testosteroxytrimethylsilane
5055-42-5

testosteroxytrimethylsilane

Conditions
ConditionsYield
With [Ru(κ1-OAc)(κ2-OAc)(κ3-1,1,1-tris(diphenylphosphinomethyl)ethane)] In acetonitrile at 70℃; for 1h; Inert atmosphere; Schlenk technique;97%
With tris(2-diphenylphosphinoethyl)phosphine; iron(II) acetate In dichloromethane for 2h; Glovebox; Inert atmosphere; Heating;92%
succinic acid anhydride
108-30-5

succinic acid anhydride

testosterone
58-22-0

testosterone

3-(3-oxo-4-androsten-17β-oxycarbonyl)propionic acid
521-15-3

3-(3-oxo-4-androsten-17β-oxycarbonyl)propionic acid

Conditions
ConditionsYield
With pyridine at 230℃; for 0.333333h; Sealed tube; Microwave irradiation;96%
With dmap In tetrahydrofuran for 16h; Heating;90%
With pyridine at 125℃;
chloro-trimethyl-silane
75-77-4

chloro-trimethyl-silane

testosterone
58-22-0

testosterone

testosteroxytrimethylsilane
5055-42-5

testosteroxytrimethylsilane

Conditions
ConditionsYield
With pyridine In benzene 1.) room temperature, 1 h, 2.) 80 deg C, 2 h;96%
With Aliquat 336; potassium carbonate In Petroleum ether at 60℃; for 4h;63%
n-dodecanoyl chloride
112-16-3

n-dodecanoyl chloride

testosterone
58-22-0

testosterone

3-oxoandrost-4-en-17β-yl dodecanoate
59232-78-9

3-oxoandrost-4-en-17β-yl dodecanoate

Conditions
ConditionsYield
With immobilized p-toluenesulfonic acid polymer bound macroporous In neat (no solvent) at 100℃; for 0.0416667h; Microwave irradiation; Sealed tube; Green chemistry;96%
With pyridine Ambient temperature;94%
4-pentynoic acid
6089-09-4

4-pentynoic acid

testosterone
58-22-0

testosterone

Pent-4-ynoic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester
220630-04-6

Pent-4-ynoic acid (8R,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester

Conditions
ConditionsYield
With dmap; dicyclohexyl-carbodiimide In dichloromethane at 20℃;96%

58-22-0Relevant articles and documents

A novel synthetic approach to steroids via intramolecular 1,3-dipolar cycloaddition. A highly stereocontrolled synthesis of testosterone

Ihara,Tokunaga,Fukumoto

, p. 4497 - 4498 (1990)

-

-

Heyl,Herr

, p. 1918 (1953)

-

STEREOSELECTIVE SYNTHESIS OF (+)-TESTOSTERONE VIA INTRAMOLECULAR 1,3-DIPOLAR CYCLOADDITION OF NITRILE OXIDE

Ihara, Masataka,Tokunaga, Yuji,Taniguchi, Nobuaki,Fukumoto, Keiichiro

, p. 6635 - 6648 (1991)

A new approach for construction of the A/B ring system of steroids was developed by way of an intramolecular 1,3-dipolar cycloaddition of a nitrile oxide 4, followed by an incorporation of a C3 unit.A highly stereocontrolled synthesis of (+)-testosterone 1 was accomplished by this strategy. Key Words: Steroids, testosterone, 1,3-dipolar cycloaddition, nitrile oxide, chiral synthesis

Influence of whole microalgal cell immobilization and organic solvent on the bioconversion of androst-4-en-3,17-dione to testosterone by Nostoc muscorum

Arabi,Yazdi, M. Tabatabaei,Faramarzi

, p. 213 - 217 (2010)

The use of free, immobilized and reused immobilized cells of the microalga Nostoc muscorum was studied for bioconversion of androst-4-en-3,17-dione (AD) to testosterone in hexadecane. Among polymers such as agar, agarose, κ-carrageenan, polyacrylamide, polyvinyl alcohol, and sodium alginate that were examined for cell entrapment, sodium alginate with a concentration of 2% (w/v) proved to be the proper matrix for N. muscorum cells immobilization. The bioconversion characteristics of immobilized whole algal cells at ranges of temperatures, substrate concentrations, and shaking speeds were studied followed by a comparison with those of free cells. The conditions were 30°C, 0.5. g/L, and 100. rpm, respectively. The immobilized N. muscorum showed higher yield (72 ± 2.3%) than the free form (24 ± 1.3%) at the mentioned conditions. The bioconversion yield did not decrease during reuse of immobilized cells and remained high even after 5 batches of bioreactions while Na-alginate 3% was used; however, reuse of alginate 2% beads did not give a satisfactory result.

SYNTHESIS OF TESTOSTERONE FROM ANDROST-4-ENE-3,17-DIONE

Andryushina, V. A.,Morozova, L. S.,Grinenko, G. S.

, p. 883 - 884 (1987)

-

ANDROSTENEDIONE AND TESTOSTERONE BIOSYNTHESIS BY THE ANDRENAL CORTEX OF THE HORSE

Silberzahn, Pierre,Rashed, Fakhri,Zwain, Ismail,Leymarie, Pierre

, p. 147 - 152 (1984)

An homogenate from cortical tissue of mare adrenals was incubated in the presence of tritiated pregnenolone.The (3H) androstenedione and the (3H) testosterone synthesized during the incubation were extracted, purified, and co-crystallized to constant specific activity in the presence of unlabeled carriers.The rate of conversion of pregnenolone to androstenedione and testosterone was of the order of 5 and 0.15 per cent respectively.The high ratio of (3H) androstenedione to (3H) testosterone observed in this study suggests that androstenedione is the main androgen produced by mare adrenals.It is concluded that adrenals could contribute to the production of blood androgens in normal as well as hyperandrogenic mares.

The aging Leydig cell: 2. Two distinct populations of Leydig cells and the possible site of defective steroidogenesis

Chen,Lin,Murono,Osterman,Cole,Nankin

, p. 63 - 72 (1981)

Using metrizamide gradient centrifugation two populations of Leydig cells were found in both 60-90 day old and 24 month old rats. Cells from both Band 2 (B2) and Band 3 (B3) responded to LH stimulation with increased cyclic AMP formation; however, only B3 cells produced significant amounts of testosterone. Cells from both B2 and B3 of the old rats synthesized less cyclic AMP and testosterone than cells from their younger counterparts. In response to LH stimulation, 0.01 - 1.0 mIU/ml, no appreciable difference of cyclic AMP formation could be detected between young and old Leydig cells. Maximal testosterone production occurred when 1 mIU/ml LH was used. Only when LH concentration was increased to 10 and 100 mIU/ml, did young Leydig cells produce significantly more cyclic AMP than old Leydig cells. After addition of 5 x 10-7M of pregnenolone or progesterone to the incubation medium both young and old Leydig cells produced comparable amounts of testosterone. These results demonstrate no impairment of old rat Leydig cells to synthesize testosterone from pregnenolone and progesterone.

Synthesis method of alkyl acid testosterone

-

, (2020/12/10)

The invention discloses a synthesis method of alkyl acid testosterone, and belongs to the technical field of synthesis and processing of medicines. The method comprises the following steps of: taking4-androstenedione (4AD) as an initial raw material, firstly, carrying out enol ether protection on the keto group at the site 3, and reducing carbonyl at the site 17 into hydroxyl; or taking 4-androstenedione (4AD) as an initial raw material, firstly carrying out enol ether protection on the keto group at the site 3, then reducing carbonyl at the site 17 into hydroxyl, then carrying out hydrolysison the site 3 to obtain testosterone, and carrying out esterification and third-site hydrolysis to obtain the testosterone ester after testosterone third-site ketal protection. According to the method disclosed by the invention, the third site is protected during esterification reaction, the generation of impurities can be reduced, and an esterification reaction solvent is a water-insoluble organic solvent, so that after the reaction is completed, products can be directly extracted in a layered manner, a large amount of water does not need to be added to separate out the products, the amountof wastewater is reduced, the solvent can be recycled, and the process is more suitable for industrial production.

Regio- and stereoselective reduction of 17-oxosteroids to 17β-hydroxysteroids by a yeast strain Zygowilliopsis sp. WY7905

Liu, Yuanyuan,Wang, Yu,Chen, Xi,Wu, Qiaqing,Wang, Min,Zhu, Dunming,Ma, Yanhe

, p. 17 - 24 (2016/12/22)

The reduction of 17-oxosteroids to 17β-hydroxysteroids is one of the important transformations for the preparation of many steroidal drugs and intermediates. The strain Zygowilliopsis sp. WY7905 was found to catalyze the reduction of C-17 carbonyl group of androst-4-ene-3,17-dione (AD) to give testosterone (TS) as the sole product by the constitutive 17β-hydroxysteroid dehydrogenase (17β-HSD). The optimal conditions for the reduction were pH 8.0 and 30 °C with supplementing 10 g/l glucose and 1% Tween 80 (w/v). Under the optimized transformation conditions, 0.75 g/l AD was reduced to a single product TS with >90% yield and >99% diastereomeric excess (de) within 24 h. This strain also reduced other 17-oxosteroids such as estrone, 3β-hydroxyandrost-5-en-17-one and norandrostenedione, to give the corresponding 17β-hydroxysteroids, while the C-3 and C-20 carbonyl groups were intact. The absence of by-products in this microbial 17β-reduction would facilitate the product purification. As such, the strain might serve as a useful biocatalyst for this important transformation.

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