A Transient‐Directing‐Group Strategy Enables Enantioselective Reductive Heck Hydroarylation of Alkenes
作者:Lucas J. Oxtoby、Zi‐Qi Li、Van T. Tran、Tuğçe G. Erbay、Ruohan Deng、Peng Liu、Keary M. Engle
DOI:10.1002/anie.202001069
日期:2020.6.2
practicality of reactions that rely on their use. Inspired by developments in asymmetric organocatalysis, where reactions rely on reversible covalent interactions between an organic substrate and a chiral mediator, we have developed a transient-directing-group approach to reductive Heck hydroarylation of alkenyl benzaldehyde substrates that proceeds under mild conditions. Highly stereoselective migratory insertion
金属配位的导向基团已在过渡金属催化的烯烃官能化领域中得到广泛使用。然而,它们产生废物的安装和去除步骤限制了依赖于其使用的反应的效率和实用性。受不对称有机催化发展的启发,其中反应依赖于有机底物和手性介体之间可逆的共价相互作用,我们开发了一种瞬态-导向基团方法来还原烯基苯甲醛底物的Heck加氢芳基化反应,该反应在温和条件下进行。由催化量的市售氨基酸添加剂原位形成亚胺有助于高度立体选择性的迁移插入。