Cu-Catalyzed, electron-relayed three-component synthesis of 2-alkenylbenzothiazoles with cathodic ammonia evolution

A CuI-catalyzed, one-pot, three-component reaction of benzaldehydes, 2-aminobenzothiol and malononitrile is described, wherein CuI plays an electron relay. The method features simplified operation, highly atom economy, and mild reaction conditions.