Bifunctional nickel precatalysts of amido-functionalized N-heterocyclic carbenes for base-free Michael reaction under ambient conditions

…, A Narayanan, MN Rao, MM Shaikh, P Ghosh

文献索引：Kumar, Sachin; Narayanan, Anantha; Rao, Mitta Nageswar; Shaikh, Mobin M.; Ghosh, Prasenjit Journal of Organometallic Chemistry, 2012 , vol. 696, # 26 p. 4159 - 4165

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摘要

A series of new bifunctional nickel precatalysts,[1-(R)-3-N-(benzylacetamido) imidazol-2- ylidene] 2 Ni [R= Me (1b), i-Pr (2b), and CH2Ph (3b)], containing a Lewis acidic metal site and a Lewis basic amido-N site in a pendent ligand sidearm, have been successfully designed for base-free Michael addition reaction. Specifically, the nickel (1–3) b complexes catalyzed the highly desired base-free Michael addition reactions of representative cyclic ...