The Chiral Acyl-Iron Complex

Davies reported the use of resolved (5) iron crotonyl complex Treatment 

Davies employed the iron chiral auxiliary to establish unambiguously the absolute configuration of Winterstein s acid (3-iV,Ai-dimethylamino-3-phenylpropanoic acid) as (R). ° Winterstein s acid (3-A,A-dimethylamino-3-phenyl-propanoic acid) had been identified as the carboxylate side chain of the diterpene taxine This acid had 

Asymmetric synthesis of ethyl ester derivatives of Winterstein s acid 3.41. 

CHCI3) unambiguously established the absolute configuration of Winterstein s acid as (R). 

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