Regioselective 1,6-Conjugate Addition of Boronic Acids and Grignard Reagents to Dienylpyridines
作者:Aurelio Csákÿ、Silvia Roscales、Irene G. Salado
DOI:10.1055/s-0030-1261183
日期:2011.9
Functionalization of the lateral chain of dienylpyridines was achieved by the regioselective 1,6-addition of boronic acids catalyzed by rhodium(I) or Grignardreagents under iron(II) catalysis. addition - catalysis - pyridines - rhodium - iron
Borane‐Catalyzed Chemoselective and Enantioselective Reduction of 2‐Vinyl‐Substituted Pyridines
作者:Jun‐Jie Tian、Zhao‐Ying Yang、Xin‐Shen Liang、Ning Liu、Chen‐Yu Hu、Xian‐Shuang Tu、Xiang Li、Xiao‐Chen Wang
DOI:10.1002/anie.202007352
日期:2020.10.12
Herein, we report that highly chemoselective and enantioselectivereduction of 2‐vinyl‐substituted pyridines has been achieved for the first time. The reaction, which uses chiral spiro‐bicyclic bisboranes as catalysts and HBpin and an acidic amide as reducing reagents, proceeds through a cascade process involving 1,4‐hydroboration followed by transfer hydrogenation of a dihydropyridine intermediate