N-Heterocyclic Carbene-Catalyzed Annulation Of Alpha-Chloroaldehydes With Gamma-/Delta-Amino-Alpha,Beta-Unsaturated Ketones: Enantioselective Synthesis Of Pyrrolidones And Piperidones

Zhao-Fei Zhang,Chun-Lin Zhang,Zhi-Yong Song,Zhong-Hua Gao,Song Ye

CHEMISTRY-A EUROPEAN JOURNAL（2018）

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摘要

The N-heterocyclic carbene-catalyzed [2+3] and [2+4] annulations of alpha-chloroaldehydes with gamma-/delta-amino-alpha,beta-unsaturated ketones were developed, giving the corresponding pyrrolidones and piperidones in good yields with exclusive trans-selectivities and excellent enantioselectivities.

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关键词

annulation, carbene catalysis, enantioselectivity, piperidones, pyrrolidones

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