The direct preparation of functionalised cyclopropanes from allylic alcohols or α-hydroxyketones using tandem oxidation processes
作者:Graeme D. McAllister、Magalie F. Oswald、Richard J. Paxton、Steven A. Raw、Richard J.K. Taylor
DOI:10.1016/j.tet.2005.12.078
日期:2006.7
carried out in the presence of a stabilised sulfurane, and the intermediate α,β-unsaturated carbonyl compound undergoes in situ cyclopropanation. By using a combination of stabilisedphosphorane and sulfurane, the direct conversion of allylic alcohols or α-hydroxyketones into functionalised cyclopropanes is achieved, with in situ cyclopropanation being followed by Wittig olefination, or vice versa. The