Promiscuous Substrate Binding Explains the Enzymatic Stereo- and Regiocontrolled Synthesis of Enantiopure Hydroxy Ketones and Diols
作者:Marcela Kurina-Sanz、Fabricio R. Bisogno、Iván Lavandera、Alejandro A. Orden、Vicente Gotor
DOI:10.1002/adsc.200900218
日期:2009.8
Regio- and stereoselectivereductions of several diketones to afford enantiopure hydroxy ketones or diols were accomplished using isolated alcohol dehydrogenases (ADHs). Results could be rationalised taking into account different (promiscuous) substrate-binding modes in the active site of the enzyme. Furthermore, interesting natural cyclic diketones were also reduced with high regio- and stereoselectivity
Efficient application of lipase-catalyzed transesterification to the resolution of γ-hydroxy ketones
作者:Paolo Crotti、Valeria Di Bussolo、Lucilla Favero、Filippo Minutolo、Mauro Pineschi
DOI:10.1016/0957-4166(96)00151-6
日期:1996.5
(+/-)-trans-2-(Benzoylmethyl)-1-cyclohexanol 4, a gamma-hydroxy ketone (gamma-HK) obtained from the Sc(OTf)(3)-catalyzed addition reaction of lithium enolate 1 with cyclohexene oxide 2, was very efficiently resolved into (+)-(1S,2R)-4 and acetate (-)-(1R,2S)-6 [ee >99% for both (+)-4 and (-)-6] by supported lipase PS-catalyzed enantioselective transesterification. The enantioselective Sc(OTf)(3)-catalyzed addition of enolate 1 to propene oxide (+)-(R)-3 and (-)-(S)-3 is also described. Copyright (C) 1996 Elsevier Science Ltd