Manganese(III)-mediated oxidative free-radical cyclisations of allenyl malonates
作者:Lucy Curry、Michal S. Hallside、Luke H. Powell、Simon J. Sprague、Jonathan W. Burton
DOI:10.1016/j.tet.2009.09.112
日期:2009.12
The regioselective synthesis of alkenylcyclanones by the oxidative radical cyclisation of malonyl radicals onto both allenes and an allylsilane is reported, along with the diastereoselective formation of [3.3.0]-bicyclic γ-lactones from two of these alkenylcyclanones. Furthermore, the cyclisation of 3-, 4- and 5-allenyl malonates on exposure to manganese(III) acetate under both oxidative and reductive