BARBOT, F.;DAUPHIN, B.;MIGINIAC, PH., SYNTHESIS, BRD, 1985, N 8, 768-770
作者:BARBOT, F.、DAUPHIN, B.、MIGINIAC, PH.
DOI:——
日期:——
Cobalt‐Catalyzed Regio‐ and Stereoselective Hydroboration of Allenes
作者:Can Li、Zheng Yang、Lei Wang、Yinlong Guo、Zheng Huang、Shengming Ma
DOI:10.1002/anie.201915716
日期:2020.4.6
pincer-ligand-based cobalt-complex-catalyzed allenehydroboration affording Z-allylic boronates is described. The reaction demonstrates an excellent regio- as well as Z-stereoselectivity and a wide substrate scope that tolerates many functional groups. Based on solvent-assisted electrospray ionization mass spectrometry (SAESI-MS) studies, a rationale for the cobalt-catalyzed hydroboration involving the highly selective
α-Allenic ethers 2 are prepared by the reaction of 1,4-dialkoxy-2-butynes 1 with lithium aluminium hydride and magnesium bromide. Tertiary α-allenic amines 4 are obtained by treating 4-dialkylamine-1-methoxy-2-butynes 3 with lithium aluminium hydride and aluminium chloride.