Alkyl radical cyclisations of methylenecyclopropane derivatives
作者:Christine Destabel、Jeremy D Kilburn、John Knight
DOI:10.1016/s0040-4020(01)89429-1
日期:1994.1
Radical cyclisations of various methylenecyclopropane derivatives have been studied. Cyclisation of diphenylsubstituted (methylenecyclopropyl)butyl radical 10 gave the unexpected cyclohexene 5, via a series of radical rearrangements. In further studies, (methylenecyclopropyl) radicals underwent exclusive 5-exo cyclisation, while (methylenecyclopropyl)butyl radicals gave mixtures of products resulting
Malonate radical cyclisations of methylenecyclopropane derivatives
作者:Christine Destabel、Jeremy D Kilburn、John Knight
DOI:10.1016/s0040-4020(01)89430-8
日期:1994.1
Cyclisations of various methylenecyclopropyl substituted malonate radicals have been studied. Radicals derived from malonates 4 and 9 underwent exclusive 5-exo cyclisation onto the methylenecyclopropane alkene, followed by opening of the resulting cyclopropylmethyl radical, to give methylenecyclohexane products. Radicals derived from malonates 5 and 10 largely gave bicyclo[1.5.0]octane products, in good yields, as a result of 7-endo cyclisation. Cyclisation of the radical derived from malonate 11 gave a bicyclo[1.5.0]nonane derivative in 31% yield, as a result of an 8-endo cyclisation.
Destabel Christine, Kilburn Jeremy D., Knight John, Tetrahedron, 50 (1994) N 38, S 11267-11288
作者:Destabel Christine, Kilburn Jeremy D., Knight John