Unprecedented cooperative DBU-CuCl2 catalysis for the incorporation of carbon dioxide into homopropargylic amines leading to 6-methylene-1,3-oxazin-2-ones
作者:Raffaella Mancuso、Ida Ziccarelli、Christian S. Pomelli、Corrado Cuocci、Nicola Della Ca'、Diego Olivieri、Carla Carfagna、Bartolo Gabriele
DOI:10.1016/j.jcat.2020.03.033
日期:2020.7
catalysis by DBU and CuCl2, which allows the carboxylation of homopropargylic amines to high value added 6-methylene-1,3-oxazin-2-ones. This reaction also represents the first efficient method for the catalytic incorporation of CO2 into an acyclic substrate to give oxazinones. DFT calculations are in agreement with a mechanism involving: a) deprotonation of the substrate by DBU; b) CO2 capture with