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107868-30-4

Basic Information
CAS No.: 107868-30-4
Name: Exemestane
Article Data: 19
Molecular Structure:
Molecular Structure of 107868-30-4 (Exemestane)
Formula: C20H24O2
Molecular Weight: 296.409
Synonyms: Exemestane [USAN:INN:BAN];Aromasil;Aromasin;FCE 24304;Exemestane Tablets;Androsta-1,4-diene-3,17-dione, 6-methylene-;Exemestano;Exemestano [INN-Spanish];Exemestanum;Exemestanum [INN-Latin];HSDB 7463;Exemestane;
EINECS: 643-090-2
Density: 1.13 g/cm3
Melting Point: 155.13 ºC
Boiling Point: 453.7 ºC at 760 mmHg
Flash Point: 169 ºC
Appearance: white to light yellow crystal powder
Hazard Symbols: T,N
Risk Codes: 60-61-51
Safety: 53-22-36/37-57
PSA: 34.14000
LogP: 4.02950
Synthetic route
122370-91-6

17β-hydroxy-6-methylen- androsta-1,4-dien-3-one

107868-30-4

exemestane

Conditions
ConditionsYield
With Jones reagent In acetone at -20℃; Jones oxidation; Inert atmosphere;100%
With jones reagent In acetone at -20℃; for 0.25h;85%
With Jones reagent In acetone at 0℃; Product distribution / selectivity;
933455-74-4

6α-hydroxymethylandrosta-1,4-diene-3,17-dione

107868-30-4

exemestane

Conditions
ConditionsYield
Stage #1: 6α-hydroxymethylandrosta-1,4-diene-3,17-dione With methanesulfonyl chloride; triethylamine In dichloromethane at 0 - 30℃;
Stage #2: With methanol; potassium hydroxide at 40 - 50℃;
90%

17-hydroxyimino-6-methylenandrosta-1,4-diene-3-one

107868-30-4

exemestane

Conditions
ConditionsYield
With toluene-4-sulfonic acid In water; acetone at 25 - 30℃; for 10h; Solvent; Reagent/catalyst; Temperature; Jones Oxidation; Inert atmosphere;88.2%
19457-55-7

6-methylene-androst-4-ene 3,17-dione

107868-30-4

exemestane

Conditions
ConditionsYield
With N,O-Bis(trimethylsilyl)trifluoroacetamide; chloranil; trifluorormethanesulfonic acid In toluene at 108 - 110℃; for 0.75h; Product distribution / selectivity; Heating / reflux;81.8%
With trifluorormethanesulfonic acid; N,O-Bis(trimethylsilyl)trifluoroacetamide; chloranil In toluene Inert atmosphere; Reflux;81%
With tert-butyldimethylsilyl chloride; 2,3-dicyano-5,6-dichloro-p-benzoquinone In 1,4-dioxane at 0 - 20℃;30.2%
67-56-1

methanol

121021-51-0

6β-hydroxymethylandrosta-1,4-diene-3,17-dione

A

(6S,8R,9S,10R,13S,14S)-6-(methoxymethyl)-10,13-dimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-3H-cyclopenta[a]phenanthrene-3,17(6H)-dione

B

107868-30-4

exemestane

Conditions
ConditionsYield
With hydrogenchloride at 20℃; for 24h;A 8%
B 60%
19457-55-7, 51154-17-7

6-Methylen-4-androsten-3,17-dion

107868-30-4

exemestane

Conditions
ConditionsYield
With 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione In dimethyl sulfoxide; toluene at 85℃; for 48h; Inert atmosphere; Large scale;56.7%
897-06-3

Androsta-1,4-diene-3,17-dione

107868-30-4

exemestane

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 20 h / Heating
2: 1.10 g / benzene; ethanol; H2O / 5 h / 20 °C
3: 60 percent / conc. HCl / 24 h / 20 °C
View Scheme
Multi-step reaction with 3 steps
1.1: hydroxylamine hydrochloride; sodium acetate / water; ethanol / 6 h / Inert atmosphere; Reflux
2.1: N,N-dimethylammonium chloride / i-Amyl alcohol / 2 h / Inert atmosphere; Reflux
2.2: 15 h / 140 °C
3.1: toluene-4-sulfonic acid / water; acetone / 10 h / 25 - 30 °C / Inert atmosphere
View Scheme
Multi-step reaction with 4 steps
1: orthoformic acid triethyl ester; toluene-4-sulfonic acid / tetrahydrofuran / 12 h / 40 - 45 °C / Large scale
2: tetrahydrofuran; ethanol / 10 h / 40 - 45 °C / Large scale
3: hydrogenchloride / tetrahydrofuran; ethanol / 1 h / Large scale
4: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide; toluene / 48 h / 85 °C / Inert atmosphere; Large scale
View Scheme
67737-88-6

1α,3-dipyrrolidinylandrosta-3,5-dien-17-one

107868-30-4

exemestane

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 1.10 g / benzene; ethanol; H2O / 5 h / 20 °C
2: 60 percent / conc. HCl / 24 h / 20 °C
View Scheme
846-48-0

1-dehydrotestosterone

107868-30-4

exemestane

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 1.) Me2NH*HCl / 1.) isoamyl alcohol, reflux, 2 h, 2.) isoamyl alcohol, reflux, 15 h
2: 85 percent / Jones reagent / acetone / 0.25 h / -20 °C
View Scheme
861395-77-9

C21H28O5S

107868-30-4

exemestane

Conditions
ConditionsYield
With potassium hydroxide In methanol; dichloromethane; water at 25℃; Heating / reflux;
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    Exemestane CAS No.:107868-30-4 Name: Exemestane Synonyms: 6-Methylenandrosta-1,4-diene-3,17-dione; 10,13-Dimethyl-6-methylidene-7,8,9,10,11,12,13,14,15,16-decahydrocyclopenta[a]phenanthrene- Molecular Structure Mole

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  • 98% high quality exemestane manufacturer in China CAS NO.107868-30-4

  • Casno:

    107868-30-4

    98% high quality exemestane manufacturer in China CAS NO.107868-30-4

    Min.Order: 10 Gram

    FOB Price:  USD $ 0.0-0.0

    Qingdao white whale Import and Export Co., LTD advantage 1. One of the largest domestic suppliers. 2. Professional laboratory and production base to ensure product stability. 3. Export this product to many countries and regions at the most favora

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     China (Mainland)  |  Contact Details

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  • Exemestane/ Aromasin

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    107868-30-4

    Exemestane/ Aromasin

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    1.High Quality: Quality is life. Quality is the most important element for all goods. We have a lab doing research in Wuhan China and produce sarms in bulk quantity. We have 8 years experience making all kinds of sarms. And all our old customers

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    Business Type:Lab/Research institutions

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  • Exemestane CAS NO.107868-30-4

  • Casno:

    107868-30-4

    Exemestane CAS NO.107868-30-4

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  • 6-Methyleneandrosta-1,4-diene-3,17-dione

  • Casno:

    107868-30-4

    6-Methyleneandrosta-1,4-diene-3,17-dione

    Min.Order: 0

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    Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod

    The company is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds,

  •  Henan Wentao Chemical Product Co., Ltd.

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-370-2722992

    Address:32 Room, 5th Floor, Building 11, No. 6 Yinxing Road, High-tech Industrial Development Zone, Zhengzhou City, Henan Province

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  • Exemestane/ LIDE PHARMA- Factory supply / Best price CAS NO.107868-30-4

  • Casno:

    107868-30-4

    Exemestane/ LIDE PHARMA- Factory supply / Best price CAS NO.107868-30-4

    Min.Order: 5 Gram

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    Our Advantage & Service 1.Top quality: Using high quality material and establishing a strict quality control system,assigning specific persons in charge of each part of production,from raw material purchase to assembly. 2 Professional R&D

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     China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:+86 18049650031

    Address:陕西省西安市高新区唐延南路11号逸翠尚府北1栋7单元22层2202室

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  • Exemestane

  • Casno:

    107868-30-4

    Exemestane

    Min.Order: 100 Metric Ton

    FOB Price:  USD $ 0.0-0.0

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  • Exemestane 107868-30-4 cas 98% ready stock from Factory

  • Casno:

    107868-30-4

    Exemestane 107868-30-4 cas 98% ready stock from Factory

    Min.Order: 1 Kilogram

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    Packing: According to customer requirements Delivery time: In stock or depands Port of shipment: Ningbo/Shanghai/Qingdao OEM/ODM:Welcome Sample:We can offer our existing samples at once Appearance:white powder/ Refer to COA Storage:Refer to COA

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  • Exemestane 107868-30-4

  • Casno:

    107868-30-4

    Exemestane 107868-30-4

    Min.Order: 10 Gram

    FOB Price:  USD $ 0.0-0.0

    Our company provides one-stop services of research - development - production for a variety of special prouducts. Not only do we make effective use of our strong technological strength, but also establish of cooperative relations with several well-

    Taizhou Crene Biotechnology Co., Ltd.is a leading supplier of active pharmaceutical ingredients (APIs), with GLP labs and GMP manufacturing facilities engaging in organic synthesis

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    China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:86-576-88813233 88205808

    Address:Economic Developed Zone of Taizhou Zhejiang China

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  • Exemestane

  • Casno:

    107868-30-4

    Exemestane

    Min.Order: 0 Metric Ton

    FOB Price:  USD $ 0.0-0.0

    Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det

    Hangzhou Keying Chem Co., Ltd. Is a comprehensive enterprise, dedicated to the development, production and marketing of chemicals. As a technology innovative and service profession

  •  Hangzhou Keyingchem Co.,Ltd

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-571-85378921

    Address:Jintong international Building, No.113,Huayuangang Street, Gong shu District, Hangzhou,Zhejiang, China.

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  • Good Quality Exemestane CAS 107868-30-4

  • Casno:

    107868-30-4

    Good Quality Exemestane CAS 107868-30-4

    Min.Order: 1 Kilogram

    FOB Price:  USD $ 3.0-5.0

    Hubei Yuanmeng Biological Technology Co., Ltd., which is located in Wuhan, China. We are specializing in the exportation of APIs, and plant extracts ect. Our products has been exported to America, Australia, Brazil, the Europe, Middle East and other

    Hubei Yuanmeng Biological Technology Co., Ltd., which is located in Wuhan, China. We are specializing in the exportation of APIs, and plant extracts ect. Our products has been exp

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     China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:86-027-68897569

    Address:Hongshan District

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  • Exemestane

  • Casno:

    107868-30-4

    Exemestane

    Min.Order: 0

    FOB Price:  USD $ 0.0-0.0

    J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia

    J&H Chemical is one of China's leading providers of integrated fine chemical services including offering, research and development, Custom manufacturing business, as well as other

  •  Hangzhou J&H Chemical Co., Ltd.

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-571-87396432

    Address:No.200 Zhenhua Rd.Xihu Industrial Park, Hangzhou 310030, China

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Specification

The Exemestane, with the CAS registry number 107868-30-4, is also known as 6-Methylenandrosta-1,4-diene-3,17-dione; 10,13-Dimethyl-6-methylidene-7,8,9,10,11,12,13,14,15,16-decahydrocyclopenta[a]phenanthrene-. It belongs to the product categories of Intermediates & Fine Chemicals;Pharmaceuticals;Steroids;Pfizer compounds;Steroid and Hormone.This chemical's molecular formula is C20H24O2 and molecular weight is 296.40. What's more,Its systematic name is 6-Methyleneandrosta-1,4-diene-3,17-dione.It is a white to light yellow crystal powder.Exemestane is used as an antineoplastic.An oral steroidal aromatase inhibitor used in the adjuvant treatment of hormonally-responsive breast cancer in postmenopausal women.

Physical properties about Exemestane are:
(1)ACD/LogP: 2.432; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.43; (4)ACD/LogD (pH 7.4): 2.43; (5)ACD/BCF (pH 5.5): 41.52; (6)ACD/BCF (pH 7.4): 41.52; (7)ACD/KOC (pH 5.5): 501.13; (8)ACD/KOC (pH 7.4): 501.13; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Index of Refraction: 1.572; (13)Molar Refractivity: 85.797 cm3; (14)Molar Volume: 260.59 cm3; (15)Surface Tension: 42.9010009765625 dyne/cm; (16)Density: 1.137 g/cm3; (17)Flash Point: 168.985 °C; (18)Enthalpy of Vaporization: 71.317 kJ/mol; (19)Boiling Point: 453.719 °C at 760 mmHg; (20)Vapour Pressure: 0 mmHg at 25°C.

Preparation of Exemestane:
Triethyl orthoformate and ethanol are dissolved in tetrahydrofuran.In the presence of p-toluenesulfonic acid reaction,add N-methyl aniline and formaldehyde solution to continue to respond. The Mannich reaction products are soluble in benzoic acid and anhydrous 2 chew alkyl.Under the action of the DDQ,exemestane can be received, with a total yield of 45%.