Construction of contiguous chiral tertiary carbon centers by enantioselective Michael reaction of ketone lithium enolates using a chiral amine ligand
作者:Kōsuke Yasuda、Mitsuru Shindo、Kenji Koga
DOI:10.1016/s0040-4039(97)00695-3
日期:1997.5
The diastereo- and enantioselective Michael reaction of ketone lithium enolates using a chiral amine ligand (1) was examined. Michael adducts (4) were obtained in excellent chemical yields (95∼99%) with high stereoselectivities (; ee of anti-4: 81∼99%) by the reaction between alkyl phenyl ketones (2) and Michael acceptors (3) having an alkylidene group.
使用手性胺配体(1)研究了酮烯酸锂的非对映和对映选择性Michael反应。通过烷基苯基酮(2)与迈克尔受体(3)之间的反应,可以以优异的化学收率(95〜99%)获得具有高立体选择性的Michael加合物(4的ee:81〜99 %)。亚烷基。