selenoesters under hexabutylditin−hν conditions undergo regioselective intramolecular reaction with unprotonated pyridines to give polycyclic indolylpyridyl ketones. For substrates bearing a (3-pyridyl)methyl moiety connected to the 3-position of the indole ring, the cyclization provides easy access to ellipticine quinones.
从hexabutylditin-下的相应selenoesters产生的2- Indolylacyl自由基ħ ν条件经历与未质子化的
吡啶,得到多环indolylpyridyl
酮区域选择性分子内反应。对于带有连接到
吲哚环的3位的(3-
吡啶基)
甲基部分的底物,环化提供了容易获得
玫瑰树碱醌的途径。