作者:Andreas Pfaltz、Bruno Bulic、Ulrich Lücking
DOI:10.1055/s-2006-939069
日期:——
cyclopentadec-2-enone. The stereogenic center was introduced by enantioselective Cu-catalyzed conjugate addition of dimethyl-zinc. Because the ee in this step was only moderate, a new route via cyclopentadeca-2,14-dienone was developed. Enantioselective conjugate addition to this substrate led to 14-methylcylodec-2-enone, which was hydrogenated to give (-)-(R)-muscone in high overall yield with up to 98% ee.
麝香酮的大环是通过钯催化的十六-1,15-二炔环化反应制备成环十五-2-烯酮。通过对映选择性铜催化的二甲基锌共轭加成引入立体中心。由于这一步中的ee只是中等,因此开发了一条通过环十五-2,14-二烯酮的新路线。向该底物添加对映选择性共轭物产生 14-methylcylodec-2-enone,将其氢化以高总产率得到 (-)-(R)-muscone,ee 高达 98%。