Process for the preparation of 3-alkyl-cyclopentane-1,...

Details Process for the preparation of 3-alkyl-cyclopentane-1,... Process for the preparation of 3-alkyl-cyclopentane-1,...

C - Chemistry, Metallurgy

07

C

260/479.7

C07C 69/74 (2006.01)

Patent

CA 1081251

Abstract The present invention pertains to a process for the preparation of a 2-alkoxy-3,5-dicarboalkoxy-5-alkyl-cyclopent-2-ene-1-one wherein the alkyl and alkoxy radicals have from 1 to 5 carbon atoms and the carboalkoxy radicals have from 2 to 6 carbon atoms, which comprises contacting a 3,5-dicarboalkoxy- cyclopentane-1,2-dione dialkali metal salt wherein the carboalkoxy radicals have from 2 to 6 carbon atoms with at least 2 moles of a C1-5 alkyl halide per mole of 3,5-dicarboalkoxy-cyclopentane-1,2-dione dialkali metal salt under alkylating conditions. The novel 2-alkoxy-3,5-dicarboalkoxy-5-alkyl-cyclopent- 2-ene-1-one are useful intermediates in the preparation of artificial maple flavoring.

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