Process for the preparation of 2-acetylcarboxylic esters

Details Process for the preparation of 2-acetylcarboxylic esters Process for the preparation of 2-acetylcarboxylic esters

1998-12-29

2000-07-18

Keys, Rosalynd

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

Organic compounds

Carboxylic acid esters

C07C 6972

Patent

active

060909757

ABSTRACT:
Process for the preparation of 2-acetylcarboxylic esters by reacting an acetoacetic ester having 1 to 6 C atoms in the alkyl moiety with an aliphatic aldehyde having 1 to 12 C atoms at 0 to 40.degree. C. in the presence of a condensation catalyst, subsequently removing the water of reaction formed and unreacted starting materials and then hydrogenating the material at 20-160.degree. C., the temperature in the first hydrogenation phase being between 20 and 90.degree. C. and the temperature in the second phase being increased to 50 to 160.degree. C., depending on the starting temperature.

REFERENCES:
patent: 3839418 (1974-10-01), Hinton et al.
patent: 4220799 (1980-09-01), Berthold et al.
patent: 5786501 (1998-07-01), Jackson
patent: 5811573 (1998-09-01), Nishihira et al.

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