nitrile function permits the facile construction of α-branched amines from α-aminonitriles. We employed this reaction sequence for the preparation of (±)-laudanosine, (±)-laudanidine and (±)-armepavine, (±)-7-methoxycryptopleurine, and (±)-xylopinine from two closely related and readily accessible bicyclic α-aminonitriles. The final products were obtained in high to almost quantitative yields (71–98%)
腈稳定的
铵化
铵的史蒂文斯重排与腈功能的还原去除相结合,可以从α-
氨基腈中轻松构建α-支链胺。我们使用此反应序列从两个密切相关且易于获得的双环α分子制备(±)-月桂
氨酸,(±)-月桂定和(±)-臂章碱,(±)-7-甲氧基隐
氨苄
氨酸和(±)-木
吡啶-
氨基腈。最终产物是通过对这些起始原料进行N-烷基化而得到的季
铵盐,以高至几乎定量的产率(71-98%)获得。