Chiral bifunctional N-heterocyclic carbenes: synthesis and application in the aza-Morita-Baylis-Hillman reaction.

[摘要]：A series of chiral bifunctional N-heterocyclic carbene (NHC) precursors with a proximal hydroxy group were smoothly prepd. from L-pyroglutamate. Promising enantiomeric excesses (?4% ee) were achieved for the bifunctional NHC-catalyzed enantioselective aza-Morita-Baylis-Hillman reaction of cyclopent-2-enone with N-tosylphenylmethanimine.

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