A rhodium-catalyzed carbonylative transformation of alkyl halides under low pressure of CO has been developed. This robust catalyst system allows using phenols as the carbonylative coupling partner and, meanwhile, exhibits high functional group tolerance and good chemoselectivity. Substrates even with a large steric hindrance group or multiple reaction sites can be selectively converted into the desired
Ni-Catalyzed Reductive 1,2-Cross-Dialkylation of Unactivated Alkenes with Two Alkyl Bromides
作者:Jian-Xin Zhang、Wei Shu
DOI:10.1021/acs.orglett.2c01416
日期:2022.6.3
Cross-dialkylation of unactivatedalkenes represents a significant challenge due to competitive β-hydride elimination and associated selectivity issues. Herein, a Ni-catalyzed reductive 1,2-dialkylation of unactivated aliphatic alkenes has been developed using two different alkyl bromides. The reaction proceeds smoothly under mild conditions to install two Csp3–Csp3 bonds onto directed aliphatic alkenes, demonstrating
由于竞争性 β-氢化物消除和相关的选择性问题,未活化烯烃的交叉二烷基化是一项重大挑战。在此,已使用两种不同的烷基溴开发了未活化的脂肪族烯烃的镍催化还原 1,2-二烷基化。该反应在温和条件下顺利进行,将两个 C sp3 -C sp3键安装到定向脂肪族烯烃上,表现出优异的化学和区域选择性和良好的官能团耐受性。