We have designed a convergent path for the synthesis of the key fragments (C1–C7 and C6–C22) of phostriecin. The approach not only provides ready access to several biologically active molecules, such as 5‐hydroxygoniothalamin, 5‐acetoxygoniothalamin, and their analogues, but also (S)‐5‐[(S)‐1‐hydroxyallyl]furan‐2(5H)‐one derivatives with cross metathesis as the key reaction.
An Aldol Approach to the Synthesis of the EF Fragment of Spongistatin 1
作者:Michael T. Crimmins、Jason D. Katz、Laura C. McAtee、Elie A. Tabet、Steven J. Kirincich
DOI:10.1021/ol015652m
日期:2001.3.1
A synthesis of the C29-C51 fragment of spongistatin 1, containing the E and F rings, has been completed. The approach relies on four diastereoselective aldol additions and an asymmetric glycolate alkylation to establish eight of the eleven stereogenic centers. The intact chlorodiene side chain was appended by a Lewis acid catalyzed addition of an allylstannane to an epoxy enol ether.