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4890-85-1 Usage

Chemical Properties

white to off-white crystalline powder

Check Digit Verification of cas no

The CAS Registry Mumber 4890-85-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,8,9 and 0 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 4890-85:
(6*4)+(5*8)+(4*9)+(3*0)+(2*8)+(1*5)=121
121 % 10 = 1
So 4890-85-1 is a valid CAS Registry Number.
InChI:InChI=1/C15H14O2/c16-15(17)14-9-5-4-8-13(14)11-10-12-6-2-1-3-7-12/h1-9H,10-11H2,(H,16,17)/p-1

4890-85-1SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name 2-Bibenzylcarboxylic acid

1.2 Other means of identification

Product number -
Other names Benzoic acid, 2-(2-phenylethyl)-

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:4890-85-1 SDS

4890-85-1Synthetic route

potassium 4-methyl-1-phenyl-2,6,7-trioxa-1-borabicyclo-[2.2.2]octan-1-uide

potassium 4-methyl-1-phenyl-2,6,7-trioxa-1-borabicyclo-[2.2.2]octan-1-uide

o-(2-bromoethyl)benzaldehyde
35040-52-9

o-(2-bromoethyl)benzaldehyde

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With dmap; dichloro bis(acetonitrile) palladium(II); bis-[(trifluoroacetoxy)iodo]benzene In 1,4-dioxane; acetonitrile at 70℃; for 24h; Temperature; Reagent/catalyst;97.2%
(Z)-3-benzylidenephthalide
4767-56-0

(Z)-3-benzylidenephthalide

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With hydrogen; nickel In isopropyl alcohol at 60℃; under 3102.9 Torr; 20-24 h, other reagents: palladium or platinum on carbon, platinum oxide;96%
(E)-2-styrylbenzoic acid
5079-90-3

(E)-2-styrylbenzoic acid

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With oxygen; guanidine nitrate; hydrazine hydrate In ethanol at 80℃; under 760.051 Torr; for 16h;95%
Multi-step reaction with 2 steps
1: chloroform; chlorine
2: palladium/charcoal; ethanol / Hydrogenation
View Scheme
Multi-step reaction with 2 steps
1: ethanol / Irradiation
2: palladium/charcoal; ethanol / Hydrogenation
View Scheme
Multi-step reaction with 2 steps
1: ethanol / Irradiation.UV-Licht
2: palladium/charcoal; ethanol / Hydrogenation
View Scheme
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With sodium tetrahydroborate; sodium hydroxide In water at 20 - 60℃;89%
With iron(III) chloride hexahydrate; hydrazine hydrate In ethanol at 80℃; for 24h;75%
With palladium carbon (20 wt%); hydrogen under 760.051 Torr;905 mg
3-benzyl-3H-isobenzofuran-1-one
7011-98-5

3-benzyl-3H-isobenzofuran-1-one

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With palladium 10% on activated carbon; W(OTf)6; hydrogen; acetic acid at 100℃; under 760.051 Torr; for 12h;86%
With palladium on activated carbon; W(OTf)6; hydrogen In acetic acid at 50℃; under 760.051 Torr; for 12h;86%
With chloro-trimethyl-silane; sodium iodide In acetonitrile for 2h; Heating;2%
With hydrogenchloride; sodium amalgam; ethanol
Isoaurone
575-61-1

Isoaurone

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With limonene.; palladium on activated charcoal for 3h; Heating;86%
With phosphorus; hydrogen iodide
(i) aq. KOH, (ii) (electrochemical reduction); Multistep reaction;
With phosphorus; hydrogen iodide at 165 - 170℃;
(i) aq. NaOH, (ii) H2, Pd-C; Multistep reaction;
carbon dioxide
124-38-9

carbon dioxide

1,1'-(1,2-ethanediyl)bisbenzene
103-29-7

1,1'-(1,2-ethanediyl)bisbenzene

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With Et3SiB(C6F5)4 In chlorobenzene at 20℃; under 22502.3 Torr; for 18h;73%
2-[2-(3-bromo-phenyl)-vinyl]-benzoic acid
869070-21-3

2-[2-(3-bromo-phenyl)-vinyl]-benzoic acid

A

2-(3-bromophenethyl)benzoic acid
198707-81-2

2-(3-bromophenethyl)benzoic acid

B

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
Stage #1: 2-[2-(3-bromo-phenyl)-vinyl]-benzoic acid With ammonia In water at 50℃; for 0.5h; Charcoal;
Stage #2: With hydrogen; 5% rhodium-on-charcoal In water at 47℃; under 15201 - 22801.5 Torr; for 0.5h;
Stage #3: With hydrogenchloride In water pH=2;
A 71%
B n/a
Isoaurone
575-61-1

Isoaurone

A

3-benzyl-3H-isobenzofuran-1-one
7011-98-5

3-benzyl-3H-isobenzofuran-1-one

B

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With phosphorus; hydrogen iodide In toluene at 120℃; for 15h;A 12%
B 65%
With phosphorus; hydrogen iodide at 120℃; for 4h; Product distribution; other reag., other reaction time; without/with irrad.;A 50%
B 35%
3-phenyl-isochroman-1-one
2674-44-4, 146518-60-7

3-phenyl-isochroman-1-one

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With hydrogenchloride; sodium amalgam; ethanol
(Z)-2-(2-phenylethenyl)benzoic acid
66374-10-5

(Z)-2-(2-phenylethenyl)benzoic acid

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With palladium on activated charcoal; ethanol Hydrogenation;
(+/-)-cis-4-chloro-3-phenyl-isochroman-1-one
100954-88-9

(+/-)-cis-4-chloro-3-phenyl-isochroman-1-one

A

3-phenyl-isochroman-1-one
2674-44-4, 146518-60-7

3-phenyl-isochroman-1-one

B

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With palladium on activated charcoal; ethanol Hydrogenation;
(+/−)-trans-4-chloro-3-phenylisochroman-1-one
100954-88-9

(+/−)-trans-4-chloro-3-phenylisochroman-1-one

A

3-phenyl-isochroman-1-one
2674-44-4, 146518-60-7

3-phenyl-isochroman-1-one

B

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With palladium on activated charcoal; ethanol Hydrogenation;
Potassium; 2-((E)-styryl)-benzoate

Potassium; 2-((E)-styryl)-benzoate

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With potassium hydroxide; nickel
ethyl 2-phenethylbenzoate
5505-02-2

ethyl 2-phenethylbenzoate

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With potassium hydroxide In ethanol for 2h; Heating; Yield given;
ortho-methylbenzoic acid
118-90-1

ortho-methylbenzoic acid

iodomethylbenzene
620-05-3

iodomethylbenzene

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With sec.-butyllithium 1.) THF, cyclohexane, -78 deg C, 1 h, 2.) THF, cyclohexane, RT, 4 h; Yield given. Multistep reaction;
3-phenyl-isocoumarin
4809-08-9

3-phenyl-isocoumarin

hydrogen iodide
10034-85-2

hydrogen iodide

red phosphorus

red phosphorus

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
at 200℃; Im geschlossenen Rohr;
hydrogen iodide
10034-85-2

hydrogen iodide

Isoaurone
575-61-1

Isoaurone

red phosphorus

red phosphorus

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

hydrogen iodide
10034-85-2

hydrogen iodide

(α-bromo-benzylidene)-phthalide
6317-67-5

(α-bromo-benzylidene)-phthalide

red phosphorus

red phosphorus

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

aqueous solution of sodium-salt of/the/ trans-stilbene-carboxylic acid-(2)

aqueous solution of sodium-salt of/the/ trans-stilbene-carboxylic acid-(2)

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With sodium amalgam
deoxybenzoin-carboxylic acid-(2)

deoxybenzoin-carboxylic acid-(2)

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With phosphorus; hydrogen iodide at 190℃; im geschlossenen Rohr;
isobenzylidenephthalide

isobenzylidenephthalide

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With phosphorus; hydrogen iodide at 200℃; im geschlossenen Rohr;
2-(2-phenylacetyl)benzoic acid
33148-55-9

2-(2-phenylacetyl)benzoic acid

hydrogen iodide
10034-85-2

hydrogen iodide

phosphorus

phosphorus

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
at 190℃;
methyl 2-(2-phenylethyl)benzoate
194605-53-3

methyl 2-(2-phenylethyl)benzoate

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
With sodium hydroxide In methanol at 20℃; for 15h;
(E)-methyl 2-styrylbenzoate
38453-72-4

(E)-methyl 2-styrylbenzoate

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: H2 / 5percent Pd/C / ethanol; ethyl acetate / 0.67 h / 20 °C / 1875.19 Torr
2: aq. NaOH / methanol / 15 h / 20 °C
View Scheme
(2-methoxycarbonylbenzyl)triphenylphosphonium bromide
60494-73-7

(2-methoxycarbonylbenzyl)triphenylphosphonium bromide

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: KOt-Bu / tetrahydrofuran / 1 h / 80 °C
1.2: tetrahydrofuran / 0.5 h / 80 °C
2.1: H2 / 5percent Pd/C / ethanol; ethyl acetate / 0.67 h / 20 °C / 1875.19 Torr
3.1: aq. NaOH / methanol / 15 h / 20 °C
View Scheme
benzaldehyde
100-52-7

benzaldehyde

(C5H5)2(Cl)Zr{trans-CH=CH[CH2]4OSi(CH3)2(t-Bu)}

(C5H5)2(Cl)Zr{trans-CH=CH[CH2]4OSi(CH3)2(t-Bu)}

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: KOt-Bu / tetrahydrofuran / 1 h / 80 °C
1.2: tetrahydrofuran / 0.5 h / 80 °C
2.1: H2 / 5percent Pd/C / ethanol; ethyl acetate / 0.67 h / 20 °C / 1875.19 Torr
3.1: aq. NaOH / methanol / 15 h / 20 °C
View Scheme
Ethyl 2-(2-phenylethenyl)benzoate
87717-18-8

Ethyl 2-(2-phenylethenyl)benzoate

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: H2 / 5percent Pd/C / ethanol / 2 h / 3102.9 Torr
2: KOH / ethanol / 2 h / Heating
View Scheme
(o-ethoxycarbonylbenzyl)triphenylphosphonium bromide
59636-00-9

(o-ethoxycarbonylbenzyl)triphenylphosphonium bromide

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
2: H2 / 5percent Pd/C / ethanol / 2 h / 3102.9 Torr
3: KOH / ethanol / 2 h / Heating
View Scheme
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

1,2-diamino-benzene
95-54-5

1,2-diamino-benzene

N-(2-aminophenyl)-2-phenethylbenzamide

N-(2-aminophenyl)-2-phenethylbenzamide

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; dicyclohexyl-carbodiimide In dichloromethane; N,N-dimethyl-formamide at 20℃; for 12h;98%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

[2-(2-phenylethyl)phenyl]methanol
835-78-9

[2-(2-phenylethyl)phenyl]methanol

Conditions
ConditionsYield
With lithium aluminium tetrahydride96%
With lithium aluminium tetrahydride; diethyl ether
With lithium aluminium tetrahydride In diethyl ether at 0 - 20℃; for 3.41667h;
With lithium aluminium tetrahydride In diethyl ether at 40℃; for 2h;
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

3-phenyl-isochroman-1-one
2674-44-4, 146518-60-7

3-phenyl-isochroman-1-one

Conditions
ConditionsYield
With 2,4,6-triphenylpyrylium tetrafluoroborate; iodine In 1,2-dichloro-ethane at 20℃; for 18h; Irradiation;96%
With 2,4,6-triphenylpyrylium tetrafluoroborate; oxygen; acetic acid; zinc(II) iodide In dichloromethane at 20℃; for 72h; Irradiation; regioselective reaction;72%
With dipotassium peroxodisulfate; copper(II) acetate monohydrate; acetic acid In water at 105℃; for 2h;65%
With tetrabutylammonium tetrafluoroborate In methanol; acetonitrile at 20℃; Electrochemical reaction; regioselective reaction;53%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

10,11-Dihydro-5H-dibenzo[a,d]cyclohepten-5-one
1210-35-1

10,11-Dihydro-5H-dibenzo[a,d]cyclohepten-5-one

Conditions
ConditionsYield
With Nafion-H In various solvent(s) at 180℃; for 3h; Acylation; Friedel-Crafts intramolecular acylation;95%
With ZSM-5 In 1,2-dichloro-ethane at 0 - 90℃; for 6h; Solvent; Temperature; Inert atmosphere; Molecular sieve;95%
Nafion-H In xylene for 12h; Heating;90%
carbon monoxide
201230-82-2

carbon monoxide

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

3-phenethylphthalic acid
35157-38-1

3-phenethylphthalic acid

Conditions
ConditionsYield
With sodium acetate; palladium diacetate; silver carbonate In 1,4-dioxane at 130℃; under 760.051 Torr; for 18h;93%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

C53H74N4O4

C53H74N4O4

C83H98N4O6

C83H98N4O6

Conditions
ConditionsYield
Stage #1: o-phenethylbenzoic acid With thionyl chloride In N,N-dimethyl-formamide; toluene at 20 - 50℃; for 1h;
Stage #2: C53H74N4O4 With sodium hydroxide In N,N-dimethyl-formamide; toluene at 10 - 20℃; for 5h;
91%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

N-tosyl-1,2-oxazetidine

N-tosyl-1,2-oxazetidine

C23H21NO3S

C23H21NO3S

Conditions
ConditionsYield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; potassium pivalate In toluene at 140℃; for 10h;76%
(E)-1-Phenyl-1,3-butadiene
16939-57-4

(E)-1-Phenyl-1,3-butadiene

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

(E)-8-phenethyl-3-styrylisochroman-1-one

(E)-8-phenethyl-3-styrylisochroman-1-one

Conditions
ConditionsYield
With palladium(II) sulfate; copper diacetate In N,N-dimethyl-formamide at 110℃; for 24h; Inert atmosphere; Sealed tube;74%
oct-1-en-3-one
4312-99-6

oct-1-en-3-one

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

A

C23H26O3

C23H26O3

B

2-(3-oxooctyl)-7-phenethyl-2,3-dihydro-1H-inden-1-one

2-(3-oxooctyl)-7-phenethyl-2,3-dihydro-1H-inden-1-one

Conditions
ConditionsYield
With manganese(II)carbonate; [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2 In water; acetonitrile at 150℃; for 20h; Inert atmosphere;A 6 %Spectr.
B 73%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

A

3-benzyl-3H-isobenzofuran-1-one
7011-98-5

3-benzyl-3H-isobenzofuran-1-one

B

3-phenyl-isochroman-1-one
2674-44-4, 146518-60-7

3-phenyl-isochroman-1-one

Conditions
ConditionsYield
With dipotassium peroxodisulfate; copper diacetate; acetic acid In water at 105℃;A 8%
B 68%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

2,2,2,-trichloroethoxycarbonyl azide

2,2,2,-trichloroethoxycarbonyl azide

C17H16Cl3NO2

C17H16Cl3NO2

Conditions
ConditionsYield
With dmap; potassium carbonate In 1,2-dichloro-ethane at 90℃; for 3h;68%
4-penten-3-one
1629-58-9

4-penten-3-one

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

2-phenylethyl-6-(3-oxopentyl)benzoic acid

2-phenylethyl-6-(3-oxopentyl)benzoic acid

Conditions
ConditionsYield
With [RhCl2(p-cymene)]2 In water at 95℃; for 12h; Sealed tube;67%
4-penten-3-one
1629-58-9

4-penten-3-one

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

4-ethyl-3-methyl-7′-phenethylspiro[cyclohex[3]ene-1,2′-indene]-1′,2(3′H)-dione

4-ethyl-3-methyl-7′-phenethylspiro[cyclohex[3]ene-1,2′-indene]-1′,2(3′H)-dione

Conditions
ConditionsYield
With [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; manganese(II) acetate In acetonitrile at 150℃; for 20h; Inert atmosphere;65%
tert-Butyl acrylate
1663-39-4

tert-Butyl acrylate

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

(E)-tert-butyl 2-(3-oxo-4-phenethylisobenzofuran-1(3H)-ylidene)acetate

(E)-tert-butyl 2-(3-oxo-4-phenethylisobenzofuran-1(3H)-ylidene)acetate

Conditions
ConditionsYield
With copper(I) oxide; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; silver carbonate In toluene at 105℃; for 1.5h; stereoselective reaction;60%
N-hydroxyphthalimide
524-38-9

N-hydroxyphthalimide

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

1,3-dioxoisoindolin-2-yl 2-phenethylbenzoate

1,3-dioxoisoindolin-2-yl 2-phenethylbenzoate

Conditions
ConditionsYield
With dicyclohexyl-carbodiimide In dichloromethane at 0 - 20℃; Inert atmosphere;59%
N-methylmaleimide
930-88-1

N-methylmaleimide

o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

C20H19NO4

C20H19NO4

Conditions
ConditionsYield
With sodium dihydrogenphosphate; [ruthenium(II)(η6-1-methyl-4-isopropyl-benzene)(chloride)(μ-chloride)]2; water at 85℃; for 24h; Green chemistry; chemoselective reaction;55%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

3-benzyl-3H-isobenzofuran-1-one
7011-98-5

3-benzyl-3H-isobenzofuran-1-one

Conditions
ConditionsYield
With [bis(acetoxy)iodo]benzene; iodine In 1,2-dichloro-ethane at 75℃; Photolysis;44%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

A

3-phenyl-isocoumarin
4809-08-9

3-phenyl-isocoumarin

B

3-phenyl-isochroman-1-one
2674-44-4, 146518-60-7

3-phenyl-isochroman-1-one

Conditions
ConditionsYield
With sodium bromate; magnesium chloride In acetonitrile at 20℃; for 18h; Inert atmosphere; Irradiation; Sealed tube;A 40%
B 39%
o-phenethylbenzoic acid
4890-85-1

o-phenethylbenzoic acid

methyl 2-(2-phenylethyl)benzoate
194605-53-3

methyl 2-(2-phenylethyl)benzoate

Conditions
ConditionsYield
With diethyl ether

4890-85-1Relevant articles and documents

Regenerative role of the red phosphorus in the couple 'HIaq/Pred'

Albouy, Dominique,Etemad-Moghadam, Guita,Vinatoru, Mircea,Koenig, Max

, p. 295 - 299 (1997)

The synthesis of ortho-substituted benzoic acid 3 from benzalphthalide 1 in the presence of 'hydriodic acid-red phosphorus' (HIaq/Pred) occurs via the formation of benzylphthalide 2 as reaction intermediate. Its preparation is optimized by use of the 'supported reaction in dry media' process (Silica/HIaq) under microwave irradiation for 8 min. The role of the red phosphorus in the reduction reaction is elucidated: it intervenes in a catalytic cycle by an oxido-reductive disproportionation with the liberated iodine, affording either hypophosphorous acid in aqueous media, or P2I4 in anhydrous media with concomitant regeneration of HI. Thus, the presence of Pred in the couple 'HIaq/Pred' allows recycling of the hydriodic acid and enhances its reducing efficiency.

Cooperative iodine and photoredox catalysis for direct oxidative lactonization of carboxylic acids

Duhamel, Thomas,Mu?iz, Kilian

, p. 933 - 936 (2019/01/23)

A new method for the formation of γ- and δ-lactones from carboxylic acids through direct conversion of benzylic C-H to C-O bonds is described. The reaction is conveniently induced by visible light and relies on a mild cooperative catalysis by the combination of molecular iodine and an organic dye.

Preparation method of carboxylic acid compound

-

Paragraph 0113; 0211-0213, (2017/08/29)

The invention provides a preparation method of a carboxylic acid compound. The preparation method comprises the following step of taking a lactone component to react with hydrogen in the presence of a compound catalyst to obtain the carboxylic acid compound. The compound catalyst comprises a hydrogenation catalyst and Lewis acid. In the presence of the compound catalyst comprising the hydrogenation catalyst and the Lewis acid, the lactone component is subjected to hydrogenation ring-opening reaction to obtain the carboxylic acid compound. The preparation method has the advantages of moderate reaction conditions and high yield; compared with a traditional method, less byproducts are generated, green and chemical requirements are met and the industrial value is better.

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