G. Bar et al., A radical approach to araliopsine and related quinoline alkaloids using manganese(III) acetate, TETRAHEDR L, 41(40), 2000, pp. 7751-7755
Reaction of 4-hydroxy-1-methyl-2(1H)-quinolone 3 with electron-rich alkenes
and manganese(III) acetate produces tricyclic quinoline alkaloids, includi
ng araliopsine 1, in one-pot reactions. This combined intermolecular additi
on-cyclisation reaction produces angular and/or linear tricycles and the re
gioselectivity of the cyclisation is shown to depend on whether alkyl or ar
yl substituents are attached to the alkene. (C) 2000 Elsevier Science Ltd.
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