Herein, we disclose a straightforward approach to access transition-metal-free reductive N-formylation of nitroarenes. This reaction integrates the dual role of rongalite, which acts as a reductant and a C1 building block concurrently. This provides an alternative method for the synthesis of N-aryl formamides from nitroarenes, including the construction of a C–N bond. The utility of this protocol was
Ligand-Enabled Ni–Al Bimetallic Catalysis for Nonchelated Dual C–H Annulation of Arylformamides and Alkynes
作者:Yin-Xia Wang、Feng-Ping Zhang、Yu-Xin Luan、Mengchun Ye
DOI:10.1021/acs.orglett.0c00432
日期:2020.3.20
A bifunctional secondary phosphine oxide (SPO) ligand-controlled method was developed for Ni-Al-catalyzed nonchelated dual C-H annulation of arylformamides with alkynes, providing a series of substituted amide-containing heterocycles in <= 97% yield. The SPO-bound bimetallic catalysis proved to be critical to the reaction efficiency.