access S-heterocycles and mixed N,S-heterocycles via metal-mediated dominoreactions are described. One involves a cyclocarbopalladation/cross-coupling domino process and leads to benzene-fused five- or six-membered sulfur heterocycles with a stereo defined tetrasubstituted exocyclic double bond. The other consists in a three-component dominoreaction between 2-aminophenyl disulfide, copper cyanide