Hydride-mediated homogeneous catalysis. Catalytic reduction of .alpha.,.beta.-unsaturated ketones using [(Ph3P)CuH]6 and H2
作者:Wayne S. Mahoney、Jeffrey M. Stryker
DOI:10.1021/ja00206a008
日期:1989.11
Hydride-mediated reduction of alpha},beta}-unsaturated ketones catalytic in the hydride reagent is reported using ((Phsub 3}P)CuH)sub 6} and molecular hydrogen. The reaction proceeds at room temperature and is highly regioselective, affording either the product of conjugate reduction or complete 1,4- and 1,2-reduction to the saturated alcohol, depending on reaction conditions. In the presence of
使用((Phsub 3}P)CuH)sub 6}和分子氢报道了氢化物介导的α},β}-不饱和酮催化还原在氢化物试剂中。该反应在室温下进行并且具有高度的区域选择性,根据反应条件提供共轭还原产物或完全 1,4-和 1,2-还原为饱和醇。在过量膦的存在下,该过程是均相和化学选择性的:即使在强制条件下,分离的双键也不会被氢化。这种新型催化还原似乎是通过高活性铜 (I) 烯醇化物和醇盐中间体对分子氢的异裂活化来进行的。