Abstract
A series of chiral bifunctional N-heterocyclic carbene (NHC) precursors with a proximal hydroxy group were smoothly prepared from l-pyroglutamic acid. Promising enantiomeric excesses (up to 44% 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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