Patent ID: 7829738
Filing Date: 2010-11-09
Classification: C07C

Abstract:
1. A method of preparing a N,N-dialkylaminoalkyl acrylate of Formula 1: wherein R 1 is H, or C 1 -C 4 alkyl; R 2 is C 1 -C 4 alkylene; and R 3 and R 4 are C 1 -C 4 alkyl, comprising: a) providing a distillation reactor comprising a distillation column and a reboiler; b) continuously adding to the distillation column, entrainer, catalyst, polymerization inhibitor, and an alkyl acrylate of Formula 2 wherein R 5 is C 1 -C 4 alkyl and a dialkylamino alcohol of Formula 3 under conditions resulting in the transesterification of the alkyl acrylate with said dialkylamino alcohol to form said N,N-dialkylaminoalkyl acrylate and an alcohol of formula R 5 OH; and c) simultaneously removing an azeotropic mixture of the entrainer and the alcohol from the distillation column and removing the N,N-dialkylaminoalkyl acrylate from the reboiler.