Process for preparing trans-.beta.-benzoylacrylic acid ester

Details Process for preparing trans-.beta.-benzoylacrylic acid ester Process for preparing trans-.beta.-benzoylacrylic acid ester

1986-06-02

1991-02-19

Garner, Vivian

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

Organic compounds

Carboxylic acid esters

560 53, C07C 6708, C07C 67327, C07C 67333, C07C 69738

Patent

active

049946005

ABSTRACT:
A process for preparing trans-.beta.-benzoylacrylic acid ester having the general formula (I): ##STR1## wherein R is alkyl group or aralkyl group, which comprises dealcoholizing .beta.-benzoyl-.alpha.-alkoxypropionic acid ester having the general formula (II): ##STR2## wherein R is above, in the presence of an acid catalyst to give trans-.beta.-benzoylacrylic acid ester having the general formula (I).
According to the process of the present invention, the by-product (II) produced in the esterification reaction of .beta.-benzoylacrylic acid (III) with the alcohol (V) by the dehydration reaction can be converted into the compound (I) by the dealcoholization reaction in the presence of the acid catalyst and thus trans-.beta.-benzoylacrylic acid ester (I) with a high purity can be produced in an industrially advantageous manner.

REFERENCES:
patent: 4562068 (1985-12-01), Moller et al.
Nippon Kagakukaishi, 88, 224 (1967).
Price, J. Amer. Chem. Soc., 45, 222 (1923).
Sujiyama et al., Bull. Chem. Soc. Japan, 42, 1353 (1969).
Delaby et al., Bull. Soc. Chim. France, 2061 to 2064 (1961).

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