A new access to ring-fused cyclopropanols through samarium diiodide-induced 3-exo-trig-cyclisations
作者:Riadh Zriba、Sophie Bezzenine-Lafollée、François Guibé、Caroline Magnier-Bouvier
DOI:10.1016/j.tetlet.2007.09.071
日期:2007.11
Benzobicyclic delta-oxo-alpha,beta-unsaturated esters easily prepared from tetralones or benzosuberone, readily cyclise in the presence of samarium diiodide and tert-butanol according to a totally syn mode, leading selectively to 'cis' ring-fused cyclopropanols that spontaneously lactonise to tetracyclic compounds. (C) 2007 Published by Elsevier Ltd.