作者:G. Lewin、J. Poisson、C. Schaeffer、J.P. Volland
DOI:10.1016/s0040-4020(01)90074-2
日期:1990.1
reaction the 5-cyano derivative 6. Repeating this reaction on (bd6) leads to different compounds according to experimental conditions : (CH3CO)2O affords the lactam 8 with unchanged aspidosperman skeleton whereas (CF3CO)2O (Potier's modification) provides initially the rearranged compound 9 and finally the two epimeric tetracyclic compounds lOa and lOb. Mechanisms of formation of 8, 9, lOa and lOb
16-氯-1-脱氢vinadifformine 5b通过Polonovski反应得到5-氰基衍生物6。根据实验条件,在(bd6)上重复此反应会生成不同的化合物:(CH 3 CO)2 O提供了内酰胺8,具有不变的蛇蝎子骨架,而(CF 3 CO)2 O(Potier修饰)最初提供了重排的化合物9和最后是两种差向异构的四环化合物10a和10b。形成的机制8,9,图10a和10b中进行了讨论。