Chemoenzymatic Resolution of β-Azidophenylethanols by<i>Candida antarctica</i>and their Application for the Synthesis of Chiral Benzotriazoles
作者:Lenilson C. Rocha、Isac G. Rosset、Gliseida Z. Melgar、Cristiano Raminelli、André L. M. Porto、Alex H. Jeller
DOI:10.5935/0103-5053.20130181
日期:——
The kinetic resolutions of (±)-β-azidophenylethanols were carried out using lipase from Candida antarctica, and enantiomerically enriched (R)-β-azidophenylethanols and their corresponding (S)-β-azidophenylethyl acetates were obtained in good enantiomeric excesses (up to > 99%). The enantiomerically enriched (R)-β-azidophenylethanols were subjected to cyclization reaction with 2-(trimethylsilyl)phenyl
Non-enzymatic kinetic resolution of 1,2-azidoalcohols using a planar-chiral DMAP derivative catalyst
作者:Laura Mesas-Sánchez、Alba E. Díaz-Álvarez、Peter Dinér
DOI:10.1016/j.tet.2012.10.077
日期:2013.1
Optically pure 1,2-azidoalcohols are widely used as precursors for other high value organic products. A non-enzymatic kinetic resolution procedure for the stereoselective synthesis of chiral 1,2-azidoalcohols from the readily available racemic counterparts has been developed, employing a planar-chiral DMAP derivative catalyst. Following this procedure, a range of aromatic 1,2-azidoalcohols was obtained in good selectivities (up to S=45) and high enantiomeric excess (up to 99% ee). (c) 2012 Elsevier Ltd. All rights reserved.