anhydride (4) has been synthesised and shown to act as an efficient (55% incorporation) precursor of the cyclononadienes, glauconic and glaucanic acids, in Penicillium purpurogenum. Base-catalysed dimerisation of compound (4) yields 5% of an epimer of glaucanic acid.
已合成了丁-1-烯基(甲基)
马来酸酐(4),在紫青霉菌中可作为环壬二烯,
葡糖醛酸和
葡聚糖酸的有效前体(掺入量为55%)。化合物(4)的碱催化的二聚反应产生了5%的
葡糖二酸的差向异构体。