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 aryl groups are attached to the alkene.
三环喹啉生物碱,包括araliopsine 2,可以通过4-羟基-1-甲基-2(1 H)-喹啉5或2,4-喹啉二醇31与乙酸锰(III)在各种富电子烯烃的存在。该反应机理涉及初始的分子间自由基加成反应,然后进行自由基氧化和环化步骤。可以形成有角的和线性的三环生物碱,并且环化的区域选择性显示出取决于烷基或芳基是否连接至烯烃。