Bismuth-catalyzed methylation and alkylation of quinone derivatives with tert-butyl peroxybenzoate as an oxidant
作者:Jian Yang、Yu Dong、Shuai He、Zhi-Chuan Shi、Yu Wang、Ji-Yu Wang
DOI:10.1016/j.tet.2019.130729
日期:2019.12
radical reaction mechanism. Particularly, TBPB was used not only as an efficient oxidant, but also as a green methyl source in such transformation. Moreover, this method could also be efficiently extended to the alkylation of quinones. This reaction tolerated a series of functional groups and prepared a series of derivatives of vitamin K3 and benzoquinone. Notably, antimalarial parvaquone was synthesized
通过自由基反应机理,在过氧苯甲酸叔丁酯(TBPB)存在下,铋催化了醌的甲基化。特别地,在这种转化中,TBPB不仅用作有效的氧化剂,而且还用作绿色甲基源。而且,该方法也可以有效地扩展到醌的烷基化。该反应耐受一系列官能团,并制备了一系列维生素K 3和苯醌的衍生物。值得注意的是,通过该反应合成了抗疟原虫苯醌。