Direct Lewis Acid Catalyzed Conversion of Enantioenriched <i>N</i>-Acyloxazolidinones to Chiral Esters, Amides, and Acids
作者:Jason M. Stevens、Ana Cristina Parra-Rivera、Darryl D. Dixon、Gregory L. Beutner、Albert J. DelMonte、Doug E. Frantz、Jacob M. Janey、James Paulson、Michael R. Talley
DOI:10.1021/acs.joc.8b02451
日期:2018.12.7
enabled a unified protocol for the direct conversion of enantioenriched N-acyloxazolidinones to the corresponding chiral esters, amides, and carboxylic acids. This straightforward and catalytic method has shown remarkable chemoselectivity for substitution at the acyclic N-acyl carbonyl for a diverse array of N-acyloxazolidinone substrates. The ionic radius of the Lewis acid catalyst was demonstrated as a
Rabbit liver esterase-mediated enantioselective synthesis of 2-arylpropanoic acids
作者:Chris H. Senanayake、Timothy J. Bill、Robert D. Larsen、John Leazer、Paul J. Reider
DOI:10.1016/s0040-4039(00)61084-5
日期:1992.9
A novel enzymaticresolution of ortho-substituted 2-arylpropanoic acids using rabbit liver esterase is described. The R-enantiomer is obtained by enzymatic hydrolysis of the ethyl ester whereas the S-enantiomer is obtained by enzyme mediated enantioselective transesterification of allyl propionates to their corresponding methylesters.