C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 345/00 (2006.01) C07D 339/04 (2006.01) C07D 495/06 (2006.01) C07D 517/06 (2006.01) H01B 1/12 (2006.01)
Patent
CA 2061901
FM/6-18583/A Process for the preparation of peri-dichalcogeno polycyclic aromatic compounds Abstract of the Disclosure A process for the preparation of peri-dichalcogeno polycyclic aromatic compounds by preparing in a first step, in an amidic solvent, an alkali metal sulfide, selenide or telluride which, in a second step, is reacted with a peri-halogeno aromatic compound, which process comprises reacting in said first step an alkali metal base with elemental sulfur, selenium or tellurium at elevated temperature.
Hauenstein Kurt
Mayer Carl W.
Ag Ciba-Geigy
Fetherstonhaugh & Co.
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