C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/310.1, 260/3
C07D 263/20 (2006.01) C07D 263/22 (2006.01) C07D 263/24 (2006.01) C07D 277/08 (2006.01) C07D 277/14 (2006.01) C07D 339/06 (2006.01) C07D 339/08 (2006.01)
Patent
CA 1050995
ABSTRACT OF THE DISCLOSURE: The present invention relates to a process for the production of five membered ketonic heterocyclic compounds of the general formula: Image (l) wherein: - R1, R2, R3, R4 and R6 are identical or different and each represent n hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, which may be substituted by an hydroxy group or a radical of the formula -COOR5 in which R5 represents an alkyl radical having from 1 to 3 carbon atoms; - X is an oxygen or sulfur atom; - Y is a sulfur or nitrogen atom; and - m is the valence of Y. This process comprises reacting a difunctional compound of the formula: Image (2) wherein R1, R2, R3, R4, R6, X, Y and m have the above meanings; with carbon monoxyde and oxygen in the presence of a ctalyst selected among the soluble catalyst consisting of selenium or its derivatives, and the unsoluble catalyst consisting of a copper complex.
205349
Koch Paolo
Perrotti Emilio
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