Enantioselective total syntheses of kudtriol, 5-epi-kudtriol and their C-11 epimers
摘要:
Two approaches for the enantioselective syntheses of naturally occurring kudtriol 2a and 5-epi-kudtriol 3a as well as their C-ll epimers are presented, both using the Sharpless asymmetric dihydroxylation as the key reaction. Through comparison of the spectral data of natural triols and synthetic samples, we could confirm the absolute configuration of the natural triols. (C) 2000 Elsevier Science Ltd. All rights reserved.