A radical approach to araliopsine and related quinoline alkaloids using manganese(III) acetate
作者:Gregory Bar、Andrew F Parsons、C.Barry Thomas
DOI:10.1016/s0040-4039(00)01324-1
日期:2000.9
Reaction of 4-hydroxy-1-methyl-2(1H)-quinolone 3 with electron-rich alkenes and manganese(III) acetate produces tricyclic quinoline alkaloids, including araliopsine 1, in one-pot reactions. This combined intermolecular addition-cyclisation reaction produces angular and/or linear tricycles and the regioselectivity of the cyclisation is shown to depend on whether alkyl or aryl substituents are attached to the alkene. (C) 2000 Elsevier Science Ltd. All rights reserved.
Manganese(III) acetate mediated radical reactions leading to araliopsine and related quinoline alkaloids
作者:Gregory Bar、Andrew F Parsons、C.Barry Thomas
DOI:10.1016/s0040-4020(01)00375-1
日期:2001.5
mechanism involves an initial intermolecular radical addition reaction followed by radical oxidation and cyclisation steps. Both angular and linear tricyclic alkaloids can be formed and the regioselectivity of the cyclisation is shown to depend on whether alkyl or arylgroups are attached to the alkene.