Alcohol Synthesis by Cobalt-Catalyzed Visible-Light-Driven Reductive Hydroformylation
作者:Connor S. MacNeil、Lauren N. Mendelsohn、Tyler P. Pabst、Gabriele Hierlmeier、Paul J. Chirik
DOI:10.1021/jacs.2c07745
日期:2022.10.26
A cobalt-catalyzed reductive hydroformylation of terminal and 1,1-disubstituted alkenes is described. One-carbon homologated alcohols were synthesized directly from CO and H2, affording anti-Markovnikov products (34–87% yield) with exclusive regiocontrol (linear/branch >99:1) for minimally functionalized alkenes. Irradiation of the air-stable cobalt hydride, (dcype)Co(CO)2H (dcype = dicyclohexylphosphinoethane)
描述了钴催化的末端和 1,1-二取代烯烃的还原加氢甲酰化。一碳同系醇直接从 CO 和 H 2合成,提供抗马尔可夫尼科夫产品(34-87% 产率),对最小功能化烯烃具有独特的区域控制(线性/支链 >99:1)。用蓝光照射空气稳定的氢化钴 (dcype)Co(CO) 2 H(dcype = 二环己基膦基乙烷)产生了介导烯烃加氢甲酰化和随后的醛氢化的活性催化剂。通过使用合成气混合物的多核 NMR 光谱对串联催化反应进行原位监测,研究了绝对区域控制的机理起源。