Concise and efficient enantioselective total syntheses of heliannuols B and D have been accomplished using chirality transfer through a Lewis acid-promoted Claisen rearrangement for the construction of the C7 tertiary stereogenic center and a relay ring-closing metathesis for assembling the dihydrobenzo[b]oxepine backbone of the natural products as the key steps. (C) 2013 Elsevier Ltd. All rights reserved.
Highly Efficient, Enantiocontrolled Total Syntheses of (+)-Heliannuol D and (–)-Helibisabonol A
作者:Kozo Shishido、Yuki Manabe、Makoto Kanematsu、Mayu Osaka、Masahiro Yoshida
DOI:10.3987/com-13-s(s)50
日期:——
Enantiocontrolled total syntheses of (+)-heliannuol D (1) and (-)-helibisabonol A (2) have been accomplished efficiently from a common intermediate 9, derived from the optically pure aryl allyl ether 7 via a chirality transfer through a Lewis acid-mediated Claisen rearrangement and asymmetric dihydroxylation.