Dynamic kinetic resolution of racemic tropic acid ethyl ester and its derivatives
作者:Mary Rose Atuu、M. Mahmun Hossain
DOI:10.1016/j.tetlet.2007.03.143
日期:2007.5
The dynamic kinetic resolution of racemic mixtures of tropic acid ethyl ester under substrate racemizing conditions was studied using lipase PS with a ruthenium catalyst. Isopropenyl acetate was used as an acyl donor, since it was found to be compatible with both catalysts; this resulted in an efficient dynamic kinetic resolution. With this process, a variety of racemic tropic acid ethyl esters were
Kinetic resolution of tropic acid ethyl ester and its derivatives by lipase PS
作者:Mary Rose Atuu、Syed J. Mahmood、Frank Laib、M. Mahmun Hossain
DOI:10.1016/j.tetasy.2004.08.013
日期:2004.10
The first kinetic resolution of tropicacid ethyl ester (TAEE) with lipase PS and vinyl acetate as an acylating agent is reported. The resulting (S)-(−)-3-acetoxy tropicacid ethyl ester and (R)-(+)-tropic acid ethyl ester are produced in high yields and in excellent ee (87–94%). The method has been extended to resolve a variety of tropicacid ester derivatives. In addition, an improved method for