Synthesis of Mono-and Bifunctionalised Tetrathiafulvalene Derivatives using Tetrathiafulvalenyllithiums and the Appropriatep-Toluenesulfonyl Reagent
摘要:
Tetrathiafulvalenyllithium has been used to synthesise monofunctionalised TTF derivatives using the appropriate p-toluenesulfonyl- reagent. An improved route for forming 4,5-bifunctionalised derivatives is also reported.
Monolithiation of tetrathiafulvalene (2-(1,3-dithiol-2-ylidene)-1,3-dithiole, TTF) followed by reaction with the appropriate p-toluenesulphonyl halide yields monochloro-, monobromo- and monoiodo-TTF (34-48 % yield); tetrachloro-TTF is obtained in 30 % yield by tetralithiation of TTF followed by addition of p-toluenesulphonyl chloride. Cyclic voltammetric data establish that the oxidation potential of TTF is significantly increased upon halogenation.
Unambiguous Identification of Regioisomeric Tetrathiafulvalenes by Mass Spectrometry: Application to Dihalogeno Derivatives and the First Synthesis of 4,4‘(5‘)-Dichlorotetrathiafulvalene
作者:Raquel Andreu、María J. Blesa、Javier Garín、Ana López、Jesús Orduna、María Savirón