On the Phosphite-Mediated Synthesis of Dithiafulvenes and π-Extended Tetrathiafulvalenes

By phosphite-mediated couplings between functionalized benzaldehydes and 1,3-dithiole-2-thiones we have obtained a variety of π-extended tetrathiafulvalenes (TTF). In particular, this method has provided a new stilbene-extended TTF with lateral ­alkyne functionalities, an H-type cruciform structure. This outcome is the result of a phosphite-mediated coupling between two aldehydes.