Nickel Nanoparticle Catalyzed Mono‐ and Di‐Reductions of
<i>gem</i>
‐Dibromocyclopropanes Under Mild, Aqueous Micellar Conditions
作者:Alex B. Wood、Margery Cortes‐Clerget、Joseph R. A. Kincaid、Bhornrawin Akkachairin、Vani Singhania、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1002/anie.202006162
日期:2020.9.28
either in the absence of ligand or in the presence of 2,2′‐bipyridine, this new technology can also be used to gain access to not only monobrominated cyclopropanes, interesting building blocks for further use in synthesis, but also mono‐ or di‐deuterated analogues. Taken together, this base‐metal‐catalyzed process provides access to cyclopropyl‐containing products and is achieved under environmentally
介绍了双二溴环丙烷的轻度单-和二-氢脱卤还原反应,为合成环丙烷提供了一种简便而绿色的方法。该方法利用0.5-5 mol%的TMPhen-镍作为催化剂,当用氢化物源(如硼氢化钠)活化时,它可以清洁并选择性地脱卤二溴环丙烷。在水性表面活性剂介质中,在20-45°C之间的温度下和大气压下,只需一次操作即可进行两次还原。在较低的负载下,在没有配体或在有2,2'-联吡啶存在的情况下,这项新技术不仅可用于获得单溴化环丙烷,可用于合成的有趣结构单元,而且还可用于获得单溴环丙烷或氘代的类似物。在一起