Asymmetric Epoxidation with Polymeric Cinchona-PTCs

Asymmetric Epoxidation with Polymeric Cinchona-PTCs 

Besides the asymmetric alkylation of 1 for the synthesis of higher a-amino acid derivatives, the Park-Jew group applied their dimeric cinchona-PTCs to the 

The Park-Jew group proposed a possible transition state in which the chalcone is located between the two cinchona units in the catalyst 66, and the (1-phenyl moiety of chalcone has a k-k stacking interaction with one of the quinoline moieties in 66. 

Binaphthyl- and Biphenyl-Modified Chiral Phase-Transfer Catalysts for Asymmetric Synthesis 

Asymmetric Synthesis of a-Alkyl a-Amino Acids and Their Derivatives 

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Asymmetric Epoxidation with Polymeric Cinchona-PTCs 63... 

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