Process for the preparation of optionally substituted cinnamic a

Details Process for the preparation of optionally substituted cinnamic a Process for the preparation of optionally substituted cinnamic a

1985-10-04

1986-09-02

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

562434, 562478, 562492, 549434, C07L 6364

Patent

active

046097562

ABSTRACT:
In the preparation of a cinnamic acid by reacting the corresponding benzaldehyde with ketene in the presence of a catalyst, the improvement which comprises using as the catalyst an iron and/or zinc salt of a mono- or di-carboxylic acid with 2 to 20 carbon atoms containing free carboxylic acid and/or anhydride, and then splitting the reaction product in the temperature range from 100.degree. to 250.degree. C. with an acid or basic catalyst.

REFERENCES:
patent: 2484067 (1949-10-01), Boese
patent: 2554528 (1951-05-01), Fitzpatrick
patent: 2585223 (1952-02-01), Caldwell

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