Polarity Inversion Catalysis by the 1,4-Addition of N-Heterocyclic Carbenes

Xuan B. Nguyen, Yuji Nakano, David W. Lupton

Research output: Contribution to journalReview ArticleResearchpeer-review

9 Citations (Scopus)


Polarity inversion is the hallmark of N-heterocyclic carbene (NHC) organocatalysis, with the generation and reaction of acyl anion equivalents known for more than 70 years. In contrast, polarity inversion through 1,4-addition of NHCs to conjugate acceptors was first applied in a catalytic reaction in 2006. This sub-field of NHC-organocatalysis has developed steadily over the subsequent years, enabling novel coupling reactions, enantioselective cycloisomerizations, polymerizations, and other reactions. In this review, this emerging area of NHC-organocatalysis is discussed with comprehensive coverage. In addition, notes regarding the use of other Lewis base catalysts for related reactions, and comments regarding NHC selection for this type of catalysis, are provided.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalAustralian Journal of Chemistry
Issue number1
Publication statusPublished - 1 Jan 2020

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