Palladium on Charcoal plus Enantiopure Amino Alcohols as Catalytic Systems for the Enantioselective 1,4-Reduction of α-Substituted α,β-Unsaturated Ketones
作者:Claire Thorey、Sandrine Bouquillon、Abdellatif Helimi、Françoise Hénin、Jacques Muzart
DOI:10.1002/1099-0690(200207)2002:13<2151::aid-ejoc2151>3.0.co;2-y
日期:2002.7
The chemoselective reduction of α,β-unsaturated cyclic ketones 1−7 to the corresponding saturated ketones 8−12 was shown to proceed mainly by 1,4-addition of hydrogen to the activated double bond, resulting in enolic species. These entities could be selectively protonated in the presence of enantiopure amino alcohols to afford the corresponding saturated ketones with ee values of up to 47%. (© Wiley-VCH
α,β-不饱和环酮 1-7 化学选择性还原为相应的饱和酮 8-12 显示主要通过将氢 1,4-加成到活化的双键进行,产生烯醇物质。这些实体可以在对映纯氨基醇的存在下被选择性质子化,以提供相应的饱和酮,其 ee 值高达 47%。(© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)