The first examples of dynamic kinetic resolution by enantioselective acetylation of hemithioacetals: An efficient synthesis of homochiral α-Acetoxysulfides
作者:Stephen Brand、Martin F. Jones、Christopher M. Rayner
DOI:10.1016/0040-4039(95)01748-7
日期:1995.11
fluorescens lipasecatalysed irreversible acetylation of a hemithioacetal using vinyl acetate proceeds via a novel dynamic kinetic resolution. Thus a thiol and an aldehyde are mixed together to form a racemic hemithioacetal, essentially a single enantiomer of which is acylated under the reaction conditions. Racemisation of the unrecognised hemithioacetal by a dissociation-recombination processcatalysed by
Enzymatic Resolution of α-acetoxysulfides: A new approach to the synthesis of homochiral S,O-Acetals
作者:John Milton、Stephen Brand、Martin F. Jones、Christopher M. Rayner
DOI:10.1016/0957-4166(95)00248-n
日期:1995.8
A novel enzymatic resolution of alpha-acetoxysulfides using Pseudomonas fluorescens lipase is reported. Selectivity is highly dependent on the substrate and solvent, with enantiomeric excesses of >95% in some cases. We believe these are the first examples of enzymatic resolutions of an S,O-acetal.
HERMKENS, PERDO H. H.;MAARSEVEEN, JAN H. V.;KRUSE, CHRIS G.;SCHEEREN, HAN+, TETRAHEDRON LETT., 30,(1989) N7, C. 5009-5012
作者:HERMKENS, PERDO H. H.、MAARSEVEEN, JAN H. V.、KRUSE, CHRIS G.、SCHEEREN, HAN+