Lignanes. 18. Synthèse Totale et Confirmation de la Structure de l'Acide Mégacérotonique
作者:Eric Brown、Robert Dhal、Nadine Papin
DOI:10.1016/0040-4020(95)00836-w
日期:1995.11
Megacerotonic acid 1 has a highly exceptional structure, since it is probably the only γ-butyrolactone lignan in which the lactone ring is substituted by an aryl, an arylidene and a carboxy group. The structure of this lignan was confirmed by a racemic total synthesis which involved as key-steps a Stobbe condensation of the 3-arylglutaric ester 8 with p-anisaldehyde 9, and the hydroxylation at C-4
大cetrooniconic acid 1具有非常优异的结构,因为它可能是唯一的内酯环被芳基,亚芳基和羧基取代的γ-丁内酯木脂素。该木脂素的结构通过外消旋的全合成得到证实,该合成涉及作为关键步骤的3-芳基戊二酸酯8与对茴香醛9的Stobbe缩合,以及中间体2,3-二取代戊二醛在C-4处的羟基化。酯14。