Asymmetric Hydrogenation of Ketones and Enones with Chiral Lewis Base Derived Frustrated Lewis Pairs
作者:Bochao Gao、Xiangqing Feng、Wei Meng、Haifeng Du
DOI:10.1002/anie.201914568
日期:2020.3.9
The concept of frustrated Lewis pairs (FLPs) has been widely applied in various research areas, and metal-free hydrogenation undoubtedly belongs to the most significant and successful ones. In the past decade, great efforts have been devoted to the synthesis of chiral boron Lewis acids. In a sharp contrast, chiral Lewis base derived FLPs have rarely been disclosed for the asymmetric hydrogenation.
沮丧的路易斯对(FLP)概念已在各个研究领域中得到广泛应用,无金属氢化无疑是最重要和最成功的氢化方法。在过去的十年中,人们一直致力于合成手性硼路易斯酸。与之形成鲜明对比的是,极少有人公开了手性路易斯碱衍生的FLP用于不对称氢化。在这项工作中,通过手性恶唑啉路易斯碱与非手性硼路易斯酸的简单结合,开发了一种新型的手性FLP,从而为未来手性FLP的发展提供了有希望的新方向。这些手性FLP被证明对酮,烯酮和色酮的不对称氢化非常有效,从而以高达95%ee的高收率提供了相应的产品。