Practical asymmetric synthetic route to 4,4,4‐trifluoro‐3‐hydroxybutyrate: Head‐to‐tail and head‐to‐head crystallizations through double and single hydrogen bonds of hetero‐ and homochiral 4,4,4‐trifluoro‐3‐hydroxybutyrophenones

Abstract

A practical asymmetric synthetic route to 4,4,4-trifluoro-3-hydroxybutyrophenone and the butyric acid phenyl ester is described using heterochiral crystallization through double hydrogen bonding assembly in head-to-tail fashion and sequential Baeyer-Villiger oxidation reaction by trifluoroperacetic acid.