The ene-reductases mediated bioreduction of a selection of open-chain α-alkyl-β-aryl enones afforded the corresponding saturated α-chiral ketones in high yield and optical purity in several cases. The stereo-electronic requirements of the reaction have been investigated, considering the nature and location of substituents on the aromatic ring as well as the steric hindrance at the α-position and adjacent
Copper-catalysed enantioselective stereodivergent synthesis of amino alcohols
作者:Shi-Liang Shi、Zackary L. Wong、Stephen L. Buchwald
DOI:10.1038/nature17191
日期:2016.4.21
process to prepare and fully characterize all possible stereoisomers of a drug candidate for biological evaluation. Despite many advances in asymmetric synthesis, developing general and practical strategies for obtaining all possible stereoisomers of an organic compound that has multiple contiguous stereocentres remains a challenge. Here, we report a stereodivergent copper-based approach for the expeditious
Stereochemical Control in Microbial Reduction. XXVIII. Asymmetric Reduction of<i>α</i>,<i>β</i>-Unsaturated Ketones with Bakers’ Yeast
作者:Yasushi Kawai、Kentarou Saitou、Kouichi Hida、Duc Hai Dao、Atsuyoshi Ohno
DOI:10.1246/bcsj.69.2633
日期:1996.9
Bakers’ yeastreduction of α,β-unsaturated ketones affords optically active saturated ketones contaminated by allylic and saturated alcohols as minor components. Stereoselectivity of the reduction of carbon–carbon double bond strongly depends on the structure of β-aryl substituent. The bakers’ yeastreduction of β-phenyl enones gives saturated ketones in moderate stereoselectivity. Stereoselectivity
Bakers' yeast reduction of 3-methyl-4-phenyl-3-buten-2-one affords the corresponding saturated (3S)-ketone selectively, while 4-(2-furyl)-3-methyl-3-buten-2-one is selectively transformed to the corresponding (2S)-allylic alcohol.
A novel carbon-carbon double-bond reductase was isolated from the cells of baker's yeast. The reduction of α,β-unsaturatedketones catalyzed by this enzyme affords the corresponding saturated (S)-ketones selectively.