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Abstract
A strong electron π-donor, vinylogue bis (ethylenedithio) tetrathiafulvalene (4) has been obtained in a six-step from 4,5-bis(benzoylthio)1,3-dithiole-2-thione (7) (ca. 40% overall yield), its structure was fully characterized by 1HNMR, FT-IR, MS(EI) and elemental analysis. The yield for the starting material TEA2[Zn(DMIT2)2 is enhanced to 95% by an improved synthetic procedure described herein. Synthesis of aldehyde 14 was investigated in different solvent systems. Compound 10 and the new Homer-Wittig phosphonate (13) were first purified as a solid.