The first asymmetric catalytic synthesis of (-)-oudemanisin A 1a and its diastereomer 1b has been achieved. The key steps of our strategy involved the asymmetric alkynylation of an unsaturated aliphatic aldehyde catalyzed by Trost's ProPhenol ligand, chemoselective oxidation of the olefinic diol, base induced ring opening of the lactone, and acylation-alkylation of the ester. (C) 2017 Elsevier Ltd. All rights reserved.
Meyer, Hartmut H., Liebigs Annalen der Chemie, 1984, # 4, p. 791 - 801