Method of producing pivaloylacetic acid ester

Details Method of producing pivaloylacetic acid ester Method of producing pivaloylacetic acid ester

1995-07-12

1997-10-21

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

560176, 560178, C07C 67333, C07C 69716

Patent

active

056798300

ABSTRACT:
A pivaloylacetic acid ester is prepared at a high yield by decarbonylating a pivaloylpyruvic acid ester in gas or liquid phase in the presence of an inorganic oxide catalyst which comprises aluminum in an amount of 10% by weight or more in terms of aluminum oxide, and preferably is substantially free from heavy metals, for example, Fe, Cu, Ni, Mn, Cr, Mo and Co, and exhibits a high catalytic activity and chemical stability.

REFERENCES:
patent: 2527306 (1950-10-01), Halverstadt
patent: 4661621 (1987-04-01), Werner et al.
J. Org. Chem, 1991, vol. 56, No. 18, Emerson et al., Evidence for Ketene Intermediates in the Decarbonylation of 2,4-Dioxo Acids and Esters and 2-Oxobutanedioic Acid Esters.
David R. Lide, CRC Handbook of Chemistry and Physics, 71st edition, PP. 15-38 1990-91.

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