Enantioselective hydrogenation of β-keto sulfones with chiral Ru(II)-catalysts: synthesis of enantiomerically pure butenolides and γ-butyrolactones
摘要:
A series of beta-hydroxy sulfones were synthesized with high enantioselectivities via a new enantioselective ruthenium-catalyzed hydrogenation using MeO-BIPHEP as a ligand. Some beta-hydroxy sulfones were used in the synthesis of optically active butenolides and gamma-butyrolactones with high yields and enantioselectivities over 95%. (C) 1999 Elsevier Science Ltd. All rights reserved.
Chemistry of baker's yeast reduction products: Use of optically active (S)-(+)-1-(p-toluenesulfonyl)propan-2-ol and (S)-(+)-1-(phenylsulfonyl)propan-2-ol in synthesis.
作者:Alan P. Kozikowski、B.B. Mugrage、C.S. Li、L. Felder
DOI:10.1016/s0040-4039(00)85071-6
日期:1986.1
The utility of the title compounds in the preparation of opticallyactive lactones and alcohols is detailed.
详细说明了标题化合物在制备光学活性内酯和醇中的用途。
A mild and chemoselective CALB biocatalysed synthesis of sulfoxides exploiting the dual role of AcOEt as solvent and reagent
作者:Silvia Anselmi、Siyu Liu、Seong-Heun Kim、Sarah M. Barry、Thomas S. Moody、Daniele Castagnolo
DOI:10.1039/d0ob01966f
日期:——
Sulfoxides have been synthesised from various sulfide substrates under mild conditions exploiting CALB biocatalyst in the presence of urea hydrogen peroxide and AcOEt which acts with the dual role of solvent and reagent.
A chemo-enzymatic synthesis of chiral secondary alcohols bearing sulfur-containing functionality
作者:Qihui Chen、Ke Wang、Chengye Yuan
DOI:10.1039/b820192g
日期:——
A facile method for the preparation of chiral secondary alcohols bearing a sulfur-containing functionality using a chemo-enzymatic approach is described, with the aid of baker’s yeast and Candida Antarctica lipase B. A complete set of four stereoisomers of two substituted phenylsulfinylpropan-2-ols were synthesized from β-sulfinyl ketones with excellent enantioselectivity for the first time.
本文介绍了一种利用化学酶法、借助面包酵母和南极念珠菌脂肪酶 B 制备具有含硫官能团的手性仲醇的简便方法,首次以 β-亚磺酰基酮为原料合成了两取代苯基亚磺酰基丙-2-醇的一整套四种立体异构体,并具有极佳的对映选择性。
Nickel-Catalyzed Highly Enantioselective Hydrogenation of β-Acetylamino Vinylsulfones: Access to Chiral β-Amido Sulfones
The nickel/(S)-Binapine complex was found to be an efficient catalyst for asymmetric hydrogenation of β-acetylamino vinylsulfones to afford chiral β-Amido sulfones with excellent yields and enantioselectivities (up to 95% yields and >99% ee). This protocol has good compatibility with a series of substituted (Z)-β-acetylamino vinylsulfones or Z/E isomeric mixtures. A gram-scale reaction has also been