The 1,2,3-thiadiazole route to new vinylogue tetrathiafulvalenes
作者:Rasmus P. Clausen、Jan Becher
DOI:10.1016/0040-4020(95)01103-x
日期:1996.2
alkyne-1-thiolate gives new tetrathiafulvalene-type vinylogue extended π-donors in a one pot reaction. The solvent-/base-system used (acetonitrile/NaH) was optimised for the synthesis of 1,3-dithiole-2-thiones via this route. Efficient synthesis of the important 4-formyl-1,3-dithiol-2-thione and its coupling to 2,6(7)-bisformyltetrathiafulvalene is presented. Preparation of a number of new 1,4-dithiafulvenes
The title compounds are synthesized, using the oxidative coupling of TTF thiolates. The disulfide linkage induces approximate orthogonality between the two TTF units, while maintaining virtually unchanged their electrochemical properties.
Treatment of cyanoethylated tetrathiafulvalene-thiolates or cyanoethylated 1,3-dithiole-2-thione-4,5-dithiolate with one equiv. of caesium hydroxide hydrate selectively and in high yield produces the corresponding monocaesium salts, which can subsequently be alkylated.