Abstract
We report an efficient preparation of fully functionalized tetrathiafulvalene derivatives
(TTF) with an extended π-system via a selective magnesiation of 1,3-dithiole-2-thiones
(DTT) using 2,2,6,6-tetramethylpiperidin-1-ylmagnesium chloride–lithium chloride (TMPMgCl·LiCl);
subsequent reaction with various electrophiles, such as halides, acid chlorides, allyl
bromides, and aryl iodides, smoothly led to new mono- and difunctionalized 1,3-dithiole-2-thione
derivatives. A triethyl phosphite mediated cross-coupling of the disubstituted 1,3-dithiole-2-thione
derivatives with their oxygen analogues gave access to new symmetrically and nonsymmetrically
tetraarylated tetrathiafulvalenes of interest as organic materials.
Key words
metalation - organomagnesium reagents - palladium - cross-coupling - organic materials