... HIGHLY ENANTIOSELECTIVE REDUCTION OF δ-KETO ACIDS WITH FERMENTING BAKER'S YEAST. A FACILE SYNTHESIS OF OPTICALLY PURE (R)-(+)5-HEXADECANOLIDE Masanori UTAKA, Hisashi WATABU, and Akira TAKEDA* Department of Synthetic Chemistry, School of Engineering, Okayama University, Tsushima, Okayama 700 ... 1476 Chemistry Letters, 1985 gave a crude oil (305 mg) which was refluxed in benzene for 1 h with p-TsOH. ...