involving three-carbon homologation of bicyclic lactone intermediates and spontaneous spirolactonization of the products. The fact that these 2,3-dinor-6-oxo metabolites exist almost exclusively as spirolactone hemiacetals under acidic conditions (pH 5 and below) may explain the reported difficulties in derivatizing samples of biological origin. Several 19,19,20,20-d4 metabolites have also been synthesized
前列环素和6-酮
PGF的主要的人类尿代谢物1 α已经通过直接合成路线合成,涉及双环内酯中间体的三个碳原子的同系化和产品的自发spirolactonization。在酸性条件下(pH 5和以下),这些2,3-二价-6-氧代代谢物几乎全部以
螺内酯半缩醛形式存在,这一事实可能解释了已报道的衍生
生物来源样品的困难。还合成了几种19,19,20,20-d 4代谢物。