Reactivity of stable neopentyl-Pd intermediates in the absence of nucleophile
摘要:
In the absence of any trapping agent, stable neopentyl-Pd intermediates can terminate a catalytic cycle by undergoing a regioselective C-H activation, leading to various spiro or fused cyclopropane derivatives in a straightforward manner. If the neopentyl-Pd intermediate contains a heteroatom at a suitable position, C-H activation does not occur and stable palladacycles are isolated. (c) 2007 Published by Elsevier Ltd.
Nickel‐Catalyzed Asymmetric Reductive Arylalkylation of Unactivated Alkenes
作者:Youxiang Jin、Chuan Wang
DOI:10.1002/anie.201901067
日期:2019.5.13
Reported is an asymmetric reductive dicarbofunctionalization of unactivatedalkenes. Under the catalysis of a Ni/BOX system, various aryl bromides, incorporating a pendant olefinic unit, were successfully reacted with an array of primary alkyl bromides in the presence of Zn as a reductant, furnishing a series of benzene‐fused cyclic compounds bearing a quaternary stereocenter in high enantioselectivities