2-Substituted indoles have been efficiently obtained by selective arynic cyclisation of halogenated aryl imines of methyl ketones in the presence of the complex-base NaNH2–ButONa and by PhCH2SH–AlCl3 opening of tetrahydrothiopyranoindoles also obtained from arynic cyclisation of imines.
在络合碱 NaNH2-ButONa 的存在下,通过对甲基酮的卤代芳基
亚胺进行选择性芳基环化,以及通过 PhCH2SH-
AlCl3 开启四氢
硫代
吡喃
吲哚(也是从
亚胺的芳基环化中获得),可以有效地获得 2-取代的
吲哚。