90002-05-4Relevant academic research and scientific papers
An efficient synthesis of 4-aryl-4H-[1,2,4]triazoles under microwave irradiation in dry media
Woisel,Cazier,Surpateanu,Baudel,Boursier
, p. 71 - 74 (2007/10/03)
A microwave-enhanced synthesis of 4-aryl-4H-[1,2,4]triazole under solvent free conditions is described. The yields and especially the reaction time are noticeably improved in comparison with conventional heating.
Azocoupling of Quaternary 1,2,4-Triazolium Salts to Form 5-p-N,N-Dimethylaminophenylazo-1,2,4-triazolium Salts
Becker, H. G. O.,Hoffmann, Gerda,Gwan, Kim Mun,Knuepfer, L.
, p. 325 - 337 (2007/10/02)
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.
