Tricyclic keto-indoles were synthesized by photocyclization of easily obtained enaminones in an electro-cyclic photochemical reaction. The three methods reported were chosen according to the enaminone structure. The most general procedure using one-step synthesis was carried out in a benzene-methanol solution in the presence of sodium methylate. In the case of base sensitive substrates, the best method
在环光
化学反应中,通过容易获得的烯胺酮的光环化反应合成了
三环酮
吲哚。根据烯胺酮结构选择报道的三种方法。使用一步合成的最通用方法是在
甲醇钠存在下的
苯甲醇溶液中进行的。对于碱敏感的底物,最好的方法是光环化然后氧化。此外,通过光解反应制备了具有五元环的N-未取代的
吲哚。这三种方法都是高效且易于执行的。