Chiral copper (ii) complexes as Lewis acids for catalyzed cycloaddition, carbonyl addition, and conjugate addition reactions
摘要:
Bis(oxazoline) copper(II) complexes 1±3 function as enantioselective Lewis acid catalysts for carbocyclic and hetero Diels±Alder, aldol, Michael, ene, and amination reactions with substrates capable of chelation. X-ray crystallography of the catalyst reveals a propensity for the formation of distorted square planar or square pyramidal complexes. The sense of asymmetric induction is identical for all the processes catalyzed by [Cu((S,S)-t-Bu-box)](X) 2 complexes 1 and 2 resulting from the intervention of a distorted square planar catalyst-substrate binary complex.
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DOI:
10.1351/pac199971081407
被引量:
年份:
1999































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