An Upstream By-product from Ester Activation via NHC-Catalysis Catalyzes Downstream Sulfonyl Migration Reaction.

Abstract

A sequential reaction combining N-heterocyclic carbene (NHC) and N-hydroxyphthalimide (NHPI) catalysis allowed for the upstream by-product NHPI, which was generated in the NHC-catalyzed cycloaddition reaction, to act as the catalyst for a downstream nitrogen-to-carbon sulfonyl migration reaction. Enantiomeric excess of the major product in the cycloaddition… (More)
DOI: 10.1002/asia.201500959

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