Organic crystals new material2-dialkylamino-5-alkyl-1,3-dithiolium-4-thiolate mesoions as versatile intermediates in the synthesis of TTF derivatives

Add time:09/06/2019    Source:sciencedirect.com

Several new monoalkyl-thioalkyl substituted TTF donors have been prepared via the mesoionic 2-dialkylamino-5-alkyl-1,3-dithiolium-4-thiolate 1. By S-alkylation 1 was transformed into a number of mono- and bis-1,3-dithiolium salts 6, which were coupled with the anion of 4., 5-dimethyl-2H-1,3-dithiole-2-phosphonate ester 7 to yield series of bis-TTF's 2 and alkylthio substituted TTF's 3. By conventional methods 6 was also coupled to “symmetrically” substituted dialkylthio-TTF's 4. An improved synthesis of 1 is also reported.

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