C2-Selective Branched Alkylation of Benzimidazoles by Rhodium(I)-Catalyzed C–H Activation
作者:Gaël Tran、Danielle Confair、Kevin D. Hesp、Vincent Mascitti、Jonathan A. Ellman
DOI:10.1021/acs.joc.7b01723
日期:2017.9.1
Herein, we report a Rh(I)/bisphosphine/K3PO4 catalytic system allowing for the first time the selective branched C–H alkylation of benzimidazoles with Michael acceptors. Branched alkylation with N,N-dimethyl acrylamide was successfully applied to the alkylation of a broad range of benzimidazoles incorporating a variety of N-substituents and with both electron-rich and -poor functionality displayed
在本文中,我们报道了Rh(I)/双膦/ K 3 PO 4催化体系,首次使苯并咪唑与Michael受体进行了选择性支链C–H烷基化。用N,N-二甲基丙烯酰胺进行的支化烷基化已成功地用于各种苯并咪唑的烷基化反应,这些苯并咪唑掺入了各种N-取代基,并且在芳烃的不同部位均显示出富电子和贫电子的功能。此外,通过用甲基丙烯酸乙酯进行烷基化来引入季碳。该方法还显示出可用于氮杂苯并咪唑的C 2-选择性支链烷基化。