Abstract
(+)- and (−)-Phaseolinic acid ( 1) have been prepared in an enantioselective fashion from acetylenic acid 26 (or ent- 26 ) by a three step sequence involving lactonization, epimerization at C 3, and oxidative cleavage. 26 was obtained as a single enantiomer using a Nicholas-Schreiber reaction.
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