32675-48-2Relevant articles and documents
A kinetic study of the high temperature rearrangement of 4-ethyl-3,5-diphenyl-4H-1,2,4-triazole
Gautun,Carlsen
, p. 955 - 959 (2001)
The kinetics of the thermal rearrangement 4-ethyl-3,5-diphenyl-4H-1,2,4-triazoles, 1, to the corresponding 1-ethyl-3,5-diphenyl-l-alkyl-1H-1,2,4-triazoles, 2, was studied in 15-Crown-5 and octadecane at 3130 °C. The reaction was very slow in octadecane but proceed well in 15-Crown-5. The reaction order for the reaction was not constant but changed from an initial second order rate law towards a first order rate law as the reaction progressed. This was confirmed by the concentration dependent reaction order, nc, which was larger than the time dependent rate law, nt. The rationale for the observation was, that at high substrate concentrations the reaction order was second order while at lower concentrations a competing solvent assisted reaction plays an increasing important role. The data were in agreement with a mechanism in which the neutral 4-alkyl-triazoles in an intermolecular nucleophilic displacement reaction form a triazolium triazolate, which in a subsequent nucleophilic reaction gives the observed product.
Thermal rearrangement of 4-alkyl-4H-1,2,4-triazoles to 1-alkyl-1H-1,2,4-triazoles - A study of the mechanism by cross-over experiments
Gautun, Odd R.,Carlsen, Per H. J.
, p. 3745 - 3748 (2007/10/03)
The mechanism for the thermal rearrangement of 4-alkyl-1,2,4-triazoles to the corresponding 1-alkyl-1,2,4-triazoles, was studied by cross-over experiments with mixtures of 4-ethyl-3,5-diphenyl-4H-1,2,4-triazole and 3,5-bis(4-methylphenyl)-4-propyl-4H-1,2,
Substituent Effects in the Rearrangement of 4-Alkyl-4H-1,2,4-triazoles
Gautun, Odd Reidar,Carlsen, Per H. J.
, p. 411 - 416 (2007/10/02)
A study of the thermal rearrangement of neat 4-alkyl-substituted 4H-1,2,4-triazoles to the corresponding 1-alkyl-1H-1,2,4-triazoles showed that the rearrangement was accompanied by formation of 3,5-diphenyl-1H-1,2,4-triazole and alkenes.The composition of
