The Spirastrellolides: Construction of the Southern C(1)−C(25) Fragment Exploiting Anion Relay Chemistry
摘要:
Effective construction of the southern C(1)-C(25) fragment of spirastrellolide A has been achieved. Central to this venture was the use of four dithiane unions, including the highly effective deployment of the anion relay chemistry (ARC) tactic recently introduced by our laboratory.
A convergent synthesis of the protected C(1)-C(23) fragment 4 of the targeted natural product spirast-rellolide B is described. The key step of the synthesis is cross metathesis (CM) and TBAF promoted oxa-Michael to construct tetrahydropyran moiety. (C) 2014 Elsevier Ltd. All rights reserved.