Abstract
Two types of palladium complexes, cationic ( R ) - BINAP – Pd 2 + ( SbF 6 - ) 2 and neutral ( R)-DABNTf–Pd(CH 3CN) 2 were examined as chiral catalysts for enantioselective Claisen rearrangement. DABNTf–Pd(CH 3CN) 2 complex gave high enantio- and anti-diastereoselectivity, and good yield. This Claisen rearrangement should proceed via six-membered boat transition state through bi-dentate coordination to the Pd catalyst.
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