Synthesis of γ-lactones by desymmetrization. A synthesis of (−)-muricatacin
作者:M. Teresa Barros、M. Adilia Januario Charmier、Christopher D. Maycock、Thierry Michaud
DOI:10.1016/j.tet.2008.10.020
日期:2009.1
A short synthesis of the natural potent cytotoxic agent (-)-muricatacin 1 and related unsaturated lactones from a versatile common intermediate, dienedioate 2, derived from D-mannitol or tartaric acid, is described. The strategy depends upon the desymmetrization of 7 by dihydroxylation and elaboration of the hydroxy alkyl sidechain. A route to unsaturated lactones is also described using a cis selective Wittig reaction. Since the enantiomers of 2 are available from the corresponding tartaric acids, this method provides access to both enantiomers of the described compounds and a wide range of derivatives. (C) 2008 Elsevier Ltd. All rights reserved.