作者:Qingqi Chen、Tianyu Wang、Yi Zhang、Qiuan Wang、Jinshi Ma
DOI:10.1081/scc-120003151
日期:2002.1
ABSTRACT 9-Unsubstituted dipyrrinone 8, the useful precursor for the synthesis of biliverdins, bilirubins, and other bile pigments, was synthesized in large scale and high yield starting from acetaldehyde and nitroethane in eight steps with overall yield 10%. The key intermediate 3,4-dimethyl-2-ethoxycarbonylpyrrole 3 was synthesized via Zard–Barton's method in high yield.
摘要 9-未取代的双吡啉酮 8 是合成胆绿素、胆红素和其他胆汁色素的有用前体,以乙醛和硝基乙烷为原料,以 8 步为原料,以 10% 的总产率大规模、高产率地合成。关键中间体 3,4-二甲基-2-乙氧基羰基吡咯 3 通过 Zard-Barton 方法以高产率合成。