Zirconium-Catalyzed Synthesis of Alkenylaminoboranes: From a Reliable Preparation of Alkenylboronates to a Direct Stereodivergent Access to Alkenyl Bromides
作者:Mélodie Birepinte、Virginie Liautard、Laurent Chabaud、Mathieu Pucheault
DOI:10.1021/acs.orglett.0c00908
日期:2020.4.3
A simple procedure has been optimized for the preparation of alkenylaminoborane from alkynes using diisopropylaminoborane and HZrCp2Cl. Coupled with a magnesium-catalyzed dehydrogenation, it allowed for the use of air- and moisture-stable diisopropylamine. This synthesis has been extended to a one-pot sequence leading directly to bromoalkenes with controlled stereochemistry. As such, it provides an
已优化了使用二异丙基氨基硼烷和HZrCp 2 Cl从炔烃制备烯基氨基硼烷的简单方法。结合镁催化的脱氢作用,可以使用空气和水分稳定的二异丙胺。该合成已扩展至一锅法序列,可在受控的立体化学条件下直接生成溴代烯烃。这样,它提供了一种容易,可扩展,廉价的方法来从商业上可获得的炔烃中获取烯基硼酸酯和(E)-和(Z)-溴代烯烃。