synthesis of the marine alkaloid polycitrin A (1a) is described. The synthesis is based on the formation of 3,4-bisarylpyrrole-2,5-dicarboxylic acids from 3-arylpyruvic acids by oxidative coupling and consecutive pyrrole ring formation. The pyrrole dicarboxylic acids are then converted into 3,4-bisaryl maleimides by treatment with hypochlorite. The synthesis is completed by bromination and introduction
描述了海洋
生物碱多citrin A(1a)的合成。该合成基于通过氧化偶合和连续的
吡咯环形成由3-芳基
丙酮酸形成3,4-双芳基
吡咯-2,5-二
羧酸。然后通过用
次氯酸盐处理将
吡咯二
羧酸转化为3,4-双芳基马来
酰亚胺。通过
溴化和引入N-烷基取代基完成合成,因此以6个步骤从3-(4-
甲氧基苯基)
丙酮酸(6)获得1a,总产率为26%。