Synthesis of 2-alkoxycarbonyl enamino thioaldehydes and selenaldehydes (as pentacarbonyltungsten(0) complexes). Improved synthesis of simple and 2-cyano enamino thioaldehydes and some chemical reactions of these compounds
A series of stable 2-alkoxycarbonyl enaminothioaldehydes (2a–g) were synthesized by solvolysis of the Vilsmeier salts (1) with aqueous or methanolic sodium hydrogen sulphide.