Patent ID: 7538247
Filing Date: 2009-05-26
Classification: C07C

Abstract:
1. A process for preparing an α, β-unsaturated amide, α,β-unsaturated N-substituted amide or α,β-unsaturated N,N-disubstituted amide of formula (I) wherein R 1 , and R 2 are independently H, C 1 -C 6 alkyl, cycloalkyl, or R 1 and R 2 can form a ring, wherein the ring is selected from the group consisting of morpholine, piperazine, piperidine and pyrrolidine, R 3 is H or C 1 -C 4 alkyl and R 4 is H, methyl or ehtyl which process comprises the steps of a) forming an aqueous solution comprising at least one of or cyclic lactide, 3,6-dimethyl-1, 4-dioxane-2, 5-dione and b) heating the aqueous solution of step a) in the presence of an amine or an amine salt of the α- or β-hydroxycarboxylic acid, wherein amidation and dehydration occurs