The one-pot N-demethylation and acid-catalyzedrearrangement of morphinan-N-oxides offers a new, shorter and more efficient route to neuropharmacologically important N-substituted aporphines. An improved procedure is described for the preparation of the starting alkaloid N-oxides using Na2WO4 as catalyst. The transetherification during the rearrangement of codeinone into 2-O-alkyl-norapocodeines is
一锅N-去甲基化和吗啡喃-N-氧化物的酸催化重排提供了一条新的,更短且更有效的途径来获得神经药理学上重要的N-取代的紫杉醇。描述了使用Na 2 WO 4作为催化剂制备起始生物碱N-氧化物的改进方法。记录了可待因酮重排成2 - O-烷基-诺拉普可待因期间的酯交换作用。