Synthesis of Polycitrin A and 3,4-Bis(4-hydroxyphenyl)pyrrole Derivatives Related to Polycitone A
作者:Wolfgang Steglich、Christian Winklhofer、Andreas Terpin、Christian Peschko
DOI:10.1055/s-2006-950190
日期:——
4-diarylpyrrole-2,5-dicarboxylic acids was used for an efficient synthesis ofpolycitrin A (4). Investigation of the bromine-mediated degradation of acid 2b to maleimide 3b suggested that 2,5-dibromopyrrole (5) and 5,5-dimethoxy-3-pyrroline-2-one (6) are intermediates in this process. The debromo analogue of polycitone A (10) was prepared in two steps from pyrrole dicarboxylic acid diester 7.
3-芳基丙酮酸与芳基乙胺的氧化缩合生成 3,4-二芳基吡咯-2,5-二羧酸可用于高效合成聚柠檬酸 (4)。对溴介导的酸 2b 降解为马来酰亚胺 3b 的研究表明,2,5-dibromopyrrole (5) 和 5,5-dimethoxy-3-pyrroline-2-one (6) 是该过程的中间体。聚柠檬酮 A (10) 的脱溴类似物由吡咯二羧酸二酯 7 分两步制备。