Controlled Reduction of Nitriles by Sodium Hydride and Zinc Chloride
作者:Shunsuke Chiba、Derek Yiren Ong
DOI:10.1055/s-0039-1690838
日期:2020.5
new protocol for the controlled reduction of nitriles to aldehydes was developed using a combination of sodium hydride and zinc chloride. The iminyl zinc intermediatesderivedfrom aromatic nitriles could be further functionalized with allylmetal nucleophiles to afford homoallylamines. As the method allows the reduction of various aliphatic and aromatic nitriles with a concise procedure under milder
C–H Bond Functionalization via Hydride Transfer: Formation of α-Arylated Piperidines and 1,2,3,4-Tetrahydroisoquinolines via Stereoselective Intramolecular Amination of Benzylic C–H Bonds
作者:Paul A. Vadola、Ignacio Carrera、Dalibor Sames
DOI:10.1021/jo300635m
日期:2012.8.17
We here report a study of the intramolecular amination of sp3 C–H bonds via the hydride transfer cyclization of N-tosylimines (HT-amination). In this transformation, 5-aryl aldehydes are subjected to N-toluenesulfonamide in the presence of BF3·OEt2 to effect imine formation and HT-cyclization, leading to 2-arylpiperidines and 3-aryl-1,2,3,4-tetrahydroisoquinolines in a one-pot procedure. We examined