Preparation of .alpha.-ketocarboxylic esters

Details Preparation of .alpha.-ketocarboxylic esters Preparation of .alpha.-ketocarboxylic esters

Filed on

1989-03-15

Date issued

1990-11-06

Examiner

Killos, Paul J.

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Carboxylic acid esters

Other Related Categories

C07C 6976

Type

Patent

Status

active

Patent number

049688316

Description

ABSTRACT:
.alpha.-Ketocarboxylic esters ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are identical to or different from one another and are each hydrogen or straight-chain or branched alkyl, alkenyl, hydroxyl, alkoxy cycloalkyl or halogen and R.sup.6 is unbranched lower alkyl, are prepared by reacting glycidic esters of the formula ##STR2## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each as defined above, in the presence of zeolites or phosphates and/or phosphoric acid or boric acid on a carrier material and/or acidic metal oxides as catalysts and are used for preparing phenylacetic esters.

REFERENCES:
patent: 4016196 (1977-04-01), Kogure et al.

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