Synthesis of vinca alkaloids and related compounds XXXVIII: Formation of dimers under Polonovski reaction conditions
作者:István Moldvai、Alajos Kálmán、Csaba Szántay、Gábor Tóth、András Vedres
DOI:10.1002/recl.19881070407
日期:——
The dimeric products (la-c) have been prepared by treatment of N-oxides derived from some indole alkaloids. Their structures have been elucidated by detailed NMR investigations and the structure of 1c determined by X-ray analysis. The importance of the E2-type trans-axial elimination of the N-acyloxy intermediate in the dimer formation has also been established. The iminium salts 4a-b and the derived
通过处理衍生自一些吲哚生物碱的N-氧化物来制备二聚产物(Ia-c)。通过详细的NMR研究阐明了它们的结构,并通过X射线分析确定了1c的结构。还已经确定了在二聚体形成中N 2-酰氧基中间体的E 2型跨轴消除的重要性。已经制备了亚胺盐4a-b和衍生的假氰化物6。