The proposed intermediacy of the spiro-pyrrolenine 1 for the biosynthesis of uroporphyrinogen III has focussed attention on its synthesis. Several different approaches to close analogues of this compound are explored, including (a) the synthesis of a dilactone bridged dipyrrolic pyrrolenine, (b) deactivation of two of the pyrrole rings of the macrocycle by attaching 3-methoxycarbonyl groups and (c) approaches to spiro-macrocyclic compounds via dipyrroketones. The chemistry of the different types of synthetic intermediates is described.
螺环
吡咯啉 1 在尿
卟啉原 III
生物合成中的中介作用引起了人们对其合成的关注。探索了该化合物的密切类似物的几种不同方法,包括(a)双内酯桥联二
吡咯吡咯啉的合成,(b)通过连接3-甲氧基羰基使大环的两个
吡咯环失活,以及(c)通过二
吡咯酮生成螺大环化合物。描述了不同类型的合成中间体的
化学性质。