Improved Syntheses of Carboxytetrathiafulvalene, Formyltetrathiafulvalene and (Hydroxymethyl)tetrathiafulvalene1: Versatile Building Blocks for New Functionalised Tetrathiafulvalene Derivatives

Abstract
Reproducible, high-yielding synthesis of the title compounds 2-4, which are important precursors of highly functionalised tetrathiafulvalene derivatives and multistage redox assemblies, are described. This is demonstrated by the subsequent reactions of 3 and 4 to prepare compounds 9-16; the single crystal X-ray structure of TTF derivative 15 is described.

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