The highly enantioselective organocatalytic sulfa-Michael addition to α,β-unsaturatedketones has been accomplished using benzyl and tert-butyl mercaptans as the sulfur-centered nucleophiles. Optically active products are obtained in high yields and good to excellent stereocontrol (up to 96 % ee) from a large variety of enones. Central to these studies has been the use of the catalytic primary amine
使用苄基和叔丁基硫醇作为以硫为中心的亲核试剂,已经完成了对α,β-不饱和酮的高对映选择性有机催化磺胺-迈克尔加成反应。从多种烯酮中以高收率和良好至优异的立体控制(高达96%ee)获得光学活性产品。这些研究的核心是衍生自9-氨基-(9-脱氧)-表氢对苯二酚和D - N - Boc-苯基甘氨酸的催化伯胺盐A的使用,其中阳离子和阴离子均为手性,对烯酮的亚胺离子催化具有高反应活性和选择性。
Asymmetric Aza-Michael Reactions of α,β-Unsaturated Ketones with Bifunctional Organic Catalysts
作者:Xiaojie Lu、Li Deng
DOI:10.1002/anie.200802785
日期:2008.9.22
Enzymatic Synthesis of Enantiomerically Pure β-Amino Ketones, β-Amino Esters, and β-Amino Alcohols with Baeyer-Villiger Monooxygenases
作者:Jessica Rehdorf、Marko D. Mihovilovic、Marco W. Fraaije、Uwe T. Bornscheuer
DOI:10.1002/chem.201001480
日期:2010.8.16
The enzymatic kinetic resolution of a broad set of β‐amino ketones was investigated by using a collection of 16 Baeyer–Villigermonooxygenases from different bacterial origins, which display various substrate specificities. Within this platform of enzymes excellent enantioselectivities (E>200) were found towards aliphatic and aromatic 4‐amino‐2‐ketones, and some enzymes even showed opposite enantioselectivity