14. Preparation and Absolute Configuration of Some Iris Essential Oil Constituents of the 5-Methylsafranic-Acid Series

Article abstract of DOI:10.1002/hlca.19950780116

The β-dienoate (+)-(5S)-13a (86percent ee; meaning of α and β as in α- and β-irone, resp.) was obtained from (-)-(5S)-9a via acid-catalyzed dehydration of the diastereomer mixture of allylic tertiary alcohols (+)-(1S,5S)-15/(+)-(1R,5S)-15 (Scheme 3).Prolo