申请人:Board of Regents, The University of Texas System
公开号:US05159065A1
公开(公告)日:1992-10-27
The present invention involves, in addition to many unique substituted sapphyrins, a novel method for synthesizing sapphyrins with good efficiency and high yield. An improved 9-step synthesis of substituted sapphyrins, e.g., the two C.sub.2 symmetric sapphyrins, compounds 2 and 4 of FIG. 1C, is described herein. This synthesis involves as an important step the condensation between a tripyrrane diacid and a diformyl bipyrrole. The key tripyrrane component is prepared in three high-yield steps from readily available pyrrolic precursors and the bipyrrole portion is prepared in four steps from ethyl 3-methyl-4-methylpyrrole-2-carboxylate in roughly 33% yield overall.
本发明涉及许多独特的取代萨菲林,并且涉及一种新的合成萨菲林的方法,其效率高,产率高。本文介绍了改进的九步合成取代萨菲林的方法,例如图1C中的两种C.sub.2对称的萨菲林化合物2和4。该合成方法的重要步骤是三吡咯二酸和二甲基双吡咯之间的缩合反应。关键的三吡咯组分可以从易得的吡咯前体中经过三个高产率步骤制备,而双吡咯部分则可以从乙酰3-甲基-4-甲基吡咯-2-羧酸乙酯中经过四个步骤制备,总产率大约为33%。