| abstract |
The invention relates to a process for the preparation of arylthio and arylselenoheterocyclium salts. Such compounds are of interest as intermediates of dyes, tetrathiafulvalenes, and for the synthesis of heterocycles. The preparation is effected according to the invention by reacting a hererocyclic thione with an arenediazonium salt, if appropriate with the addition of Cu, Cu + or Cu + 2 +, in an organic solvent. |