Enantioselective Twofold C−H Annulation of Formamides and Alkynes without Built‐in Chelating Groups
作者:Hao Chen、Yin‐Xia Wang、Yu‐Xin Luan、Mengchun Ye
DOI:10.1002/anie.202001267
日期:2020.6.8
Twofold C−H annulation of readily available formamides and alkynes without built‐in chelatinggroups was achieved. Ni−Al bimetallic catalysis enabled by a bulky BINOL‐derived chiral secondary phosphine oxide (SPO) ligand proved to be critical for high reactivity and high selectivity. This reaction uses readily available formamides as starting materials and provides a concise synthetic pathway to a
Switching the Reactivity of the Nickel-Catalyzed Reaction of 2-Pyridones with Alkynes: Easy Access to Polyaryl/Polyalkyl Quinolinones
作者:Namrata Prusty、Smruti Ranjan Mohanty、Shyam Kumar Banjare、Tanmayee Nanda、Ponneri C. Ravikumar
DOI:10.1021/acs.orglett.2c02021
日期:2022.8.26
with alkynes has been achieved. A change in the reaction pathway was achieved by tuning the reaction conditions and incorporating a directing group. A wide variety of substrates and alkynes are amenable to this transformation. The key to success for this transformation is the use of sodium iodide as an additive. More importantly, we detected the five-membered metallacycle intermediate through HRMS