Useful Wittig Reagents in 1,3-Dithiole and Tetrathiafulvalene (TTF) Chemistry: 2-Thioxo- and 2-Oxo-1,3-dithiol-4-ylmethyl(triphenyl)phosphonium Bromides
DIBALH reduction of the methyl ester group of 2-(thi)oxo-1,3-dithioles 1a and 1b selectively affords the corresponding alcohols 3a and 3b which are readily converted into the title compounds 6a and 6b under standard conditions; the latter behave as useful Wittig reagents leading to sulfur-rich and space-extended TTF derivatives.