74830-06-1

Upstream product

• 103-72-0 phenyl isothiocyanate 
• 588-64-7 benzaldehyde phenylhydrazone 
• 13207-47-1 2,4-diphenyl-thiosemicarbazide 
• 100-52-7 benzaldehyde 

Downstream Products

• 58294-75-0 2,4-diphenyl-5-phenylimino-Δ²-1,3,4-thiadiazoline 
• 2273-08-7 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-thione 

Relevant academic research and scientific papers

Azocoupling of Quaternary 1,2,4-Triazolium Salts to Form 5-p-N,N-Dimethylaminophenylazo-1,2,4-triazolium Salts

Quaternary 1,2,4-triazolium salts 1 couple easily with p-N,N-dimethylamino-benzenediazonium salts to form azodyes 3 (5-N,N-dimethylaminophenylazo-1,2,4-triazolium salts), preferably under solid-liquid phase transfer conditions using chloroform or methylene chloride and triethylamine or DABCO.Zwitterionic 1,2,4-triazolium salts (anhydro mercapto hydroxide, anhydro hydroxy hydroxide, and anhydro anilido hydroxide ("nitron")) couple as well.The azodyes - as also well known from industrially used types - absorb in the region of 500 nm and have high extinction coefficients.Substituents in 1-, 3- or 4-position of the triazolium ring exert no clear substituent effects.The quaternary 1,2,4-triazolium salts were synthesized according to standard procedures.

Heterocyclic Compounds. Part 6. Synthesis of 1,3,4-Thiadiazolidines from the Reactions of Phenyl Hydrazones with Phenyl Isothiocyanate and Carbon Disulphide

The reactions of phenyl isothiocyanate with ketonephenylhydrazones in the presence of sodium hydride in dimethylformamide afforded 4-phenyl-5-phenylimino-1,3,4-thiadiazolidines (2a-e) in good yields.Aldehyde phenylhydrazones, however, gave the thiosemicar