Biocatalytic Cascade for the Synthesis of Enantiopure β-Azidoalcohols and β-Hydroxynitriles
作者:Joerg H. Schrittwieser、Iván Lavandera、Birgit Seisser、Barbara Mautner、Wolfgang Kroutil
DOI:10.1002/ejoc.200900091
日期:2009.5
one-pot reaction sequence starting from prochiral α-chloroketones leading to enantiopure β-azidoalcohols and β-hydroxynitriles is described. Asymmetric bioreduction of α-chloroketones by hydrogen transfer catalysed by an alcohol dehydrogenase (ADH) established the stereogenic centre in the first step to furnish enantiopure chlorohydrin intermediates. Subsequent biocatalysed ring closure to the epoxide
The development of catalytic enantioselective cyanation methods for preparing valuable chiral nitriles is of great interest in the areas of pharmaceutical synthesis and organic chemistry. In this study, we presented an enzymatic enantioselective cyanation strategy for the synthesis of chiral β-hydroxy nitriles using cyanohydrins as cyano sources. By combining enzyme screening and protein engineering