A stereoselective cyclisation cascade mediated by SmI2–H2O: synthetic studies towards stolonidiol
作者:Thomas M. Baker、Lisa A. Sloan、Lokman H. Choudhury、Masahito Murai、David J. Procter
DOI:10.1016/j.tetasy.2010.03.047
日期:2010.5
A cascade reaction involving sequential conjugate reduction, stereoselective aldol cyclisation and chemo-selective lactone reduction mediated by SmI2-H2O provides access to a cyclopentanol bearing two vicinal quaternary stereocentres with good stereocontrol. The functionalised cyclopentanol product has been converted to a key intermediate in ongoing asymmetric studies towards stolonidiol. (C) 2010 Elsevier Ltd. All rights reserved.
Application of a Samarium(II)-Mediated Spirocyclisation in an Asymmetric Approach to the Cyclopentanol Motif of Stolonidiol
An asymmetric approach to the cyclopentanol motif of the biologically active, marine natural product stolonidiol has been developed. The approach involves the asymmetric synthesis of chiral γ,δ-unsaturated ketones and their spirocyclisation using SmI2.