Regioselective Synthesis of Indolyldihydropyridines. A Remarkable Solvent Effect
作者:Rodolfo Lavilla、Teresa Gotsens、Joan Bosch
DOI:10.1055/s-1991-26587
日期:——
The synthesis of 1,2-dihydro-2-(3-indolyl)-1-methylpyridines and 1,4-dihydro-4-(3-indolyl)-1-methylpyridines through the addition of indoles to pyridinium salts in various solvents is described. Selective preparation of 1,2-dihydropyridines is possible performing the reaction in methanol as the solvent, whereas the 1,4-isomers are preferentially formed in dimethyl sulfoxide.
介绍了在不同溶剂中通过吲哚与吡啶鎓盐的加成反应合成 1,2-二氢-2-(3-吲哚基)-1-甲基吡啶和 1,4-二氢-4-(3-吲哚基)-1-甲基吡啶的方法。 以甲醇为溶剂进行反应可以选择性地制备 1,2-二氢吡啶,而 1,4-异构体则优先在二甲亚砜中生成。