Lipase-promoted dynamic kinetic resolution of racemic β-hydroxyalkyl sulfones
摘要:
A series of racemic beta aryl-hydroxyalkyl sulfones have been successfully transformed into the corresponding optically active O-acetyl derivatives in high yields (up to 80%) with enantiomeric excesses more than 99% using a dynamic kinetic resolution procedure, in which a lipase-promoted kinetic resolution is combined with a concomitant ruthenium-catalysed racemization of the substrates. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis of a novel ruthenium(ІІ) complex and its unique behaviors in enzymatic dynamic kinetic resolution of secondary alcohols
作者:Qihui Chen、Chengye Yuan
DOI:10.1016/j.tet.2010.03.069
日期:2010.5
was first prepared as an efficient catalyst in Candida Antarctica lipase B (CALB) mediated dynamic kineticresolution (DKR) of secondaryalcohols. With the aid of this ruthenium complex 3, (S)-1-phenylethanol was completely racemized within 25 min, and in combination with CALB, series of secondaryalcohols bearing various functional groups were resolved in an efficient DKR manner. A detailed mechanism
A series of racemic beta aryl-hydroxyalkyl sulfones have been successfully transformed into the corresponding optically active O-acetyl derivatives in high yields (up to 80%) with enantiomeric excesses more than 99% using a dynamic kinetic resolution procedure, in which a lipase-promoted kinetic resolution is combined with a concomitant ruthenium-catalysed racemization of the substrates. (c) 2005 Elsevier Ltd. All rights reserved.