二苯乙醇酸甲酯

Name	Methyl benzilate
Synonyms	Methyl benzilate Methyl benzillate ethyl a-phenylmandelate Methyl diphenylglycolate Benzilic acid, methyl ester ethyl hydroxydiphenylacetate ethyl a-hydroxydiphenylacetate Methyl hydroxy(diphenyl)acetate Benzilic acid, methyl ester (8CI) ethyl 2-hydroxy-2,2-diphenylacetate alpha-Hydroxydiphenylacetic acid, methyl ester alpha-hydroxy-alpha-phenyl-benzeneaceticacimethylester benzeneacetic acid, alpha-hydroxy-alpha-phenyl-, methyl ester Benzeneacetic acid, alpha-hydroxy-alpha-phenyl-, methyl ester Benzeneacetic acid, .alpha.-hydroxy-.alpha.-phenyl-, methyl ester
CAS	76-89-1
EINECS	200-991-1
InChI	InChI=1/C15H14O3/c1-18-14(16)15(17,12-8-4-2-5-9-12)13-10-6-3-7-11-13/h2-11,17H,1H3

Molecular Formula	C15H14O3
Molar Mass	242.27
Density	1.1515 (rough estimate)
Melting Point	73 °C
Boling Point	187 °C
Flash Point	187°C/13mm
Water Solubility	Soluble in methanol. Insoluble in water.
Vapor Presure	0.000134mmHg at 25°C
Merck	14,1080
BRN	2121492
pKa	11.38±0.29(Predicted)
Refractive Index	1.5570 (estimate)
Physical and Chemical Properties	Melting Point: 73 - 76 ℃ Boiling Point: 187 at 13mm Hg

Hazard Symbols	Xn - Harmful
Risk Codes	22 - Harmful if swallowed
Safety Description	S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes.
TSCA	Yes
HS Code	29181990

NIST chemical information	information provided by: webbook.nist.gov (external link)
EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
Use	for organic synthesis.
production method	benzoin is produced by the reaction of benzaldehyde sodium cyanide, and then reacts with potassium bromate to obtain phenylhydroxy acid, finally, it is prepared by esterification with methanol. Benzoin 4L of benzaldehyde and 6L of ethanol are mixed, 60g of sodium cyanide solution in of water solution is added, heated and refluxed for 2H, cooled, filtered, washed with water and dried by filtration to obtain product 4.5. 2. Preparation of diphenylhydroxyacetic acid 8kg of benzoin wet product, 15L of water, 58kg of 16% sodium hydroxide solution and 2kg of potassium bromate were mixed and reacted for 4H with heating and stirring. The reaction mixture was Diluted twice with water, cooled, acidified with dilute sulfuric acid to pH 7-8, and filtered. The filtrate was then acidified to a pH of 1-2 and filtered to give a crude product of about 8kg. 3. Preparation of methyl diphenylhydroxyacetate 4kg of diphenylhydroxy acid was mixed with 5L of methanol, 150ml of sulfuric acid was added, and heated to reflux for 2H. It was poured into 30L of water containing 300g of sodium carbonate, stirred and filtered to give 3kg of crude product. Recrystallization with methanol, decolorizing with activated carbon, drying at 60 ℃ to obtain about 2.8kg of finished product.

Last Update：2024-04-09 21:04:16

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