Malononitrile-Assisted Highly Chemoselective Bismuth Triflate Catalyzed Conjugate Reduction of α,β-Unsaturated Ketones
作者:Jun-Yan Shang、Fei Li、Xing-Feng Bai、Jian-Xiong Jiang、Ke-Fang Yang、Guo-Qiao Lai、Li-Wen Xu
DOI:10.1002/ejoc.201200020
日期:2012.5
bismuth-catalyzed conjugate reduction protocol that allows for the catalytic regioselective formation of substituted ketones from enones under mild conditions has been developed. We have shown for the first time that the combined poly(methylhydro)siloxane-malononitrile system can serve as an efficient reductant/reagent in 1,4-conjugate reduction of enones. The regioselectivity, efficiencies, and experimental
已经开发了一种非常简单、直接、铋催化的共轭还原方案,该方案允许在温和条件下从烯酮催化区域选择性形成取代的酮。我们首次证明了组合的聚(甲基氢)硅氧烷 - 丙二腈系统可以在烯酮的 1,4-共轭还原中用作有效的还原剂/试剂。本方法的区域选择性、效率和实验简单性补充了以前在铜或钯催化还原中使用的更复杂的方法。由于其温和的反应条件和结合使用聚(甲基氢)硅氧烷和丙二腈进行选择性还原的有趣化学反应,该方法应该被证明是有吸引力的。