作者:Kaikai Wu、Ping Wu、Liandi Wang、Jiping Chen、Chenglin Sun、Zhengkun Yu
DOI:10.1002/adsc.201400477
日期:2014.12.15
AbstractThe Brønsted acid‐mediated alkylation and alkenylation of indoles were efficiently achieved by means of 3‐(dimethylamino)acrylonitrile. Regulating the acidity of the reaction medium with para‐toluenesulfonic acid monohydrate (p‐TsOH⋅H2O) and/or acetic acid (HOAc) led to versatile formation of 3‐alkylated and 3‐alkenylated indole derivatives under mild conditions. The 3‐alkylated indole products could be nearly quantitatively transformed to the corresponding separable (E)‐ and (Z)‐3‐alkenylated indoles.magnified image