Regioselectivity in the Thermal Rearrangement of Unsymmetrical 4-Methyl-4H-1,2,4-triazoles to 1-Methyl-1H-1,2,4-triazoles
作者:Odd Gautun、Per Carlsen
DOI:10.3390/61200969
日期:——
The rearrangement of 4-methyl-3,5-diaryl-4H-1,2,4-triazoles to the corresponding 1-methyl-3,5-diaryl-1H-1,2,4-triazoles showed regioselectivity comparable to that observed for the alkylation of 3,5-diaryl-1H-1,2,4-triazoles. This lends support to a proposed mechanism for the rearrangement that involves consecutive nucleophilic displacements steps.
将 4-甲基-3,5-二芳基-4H-1,2,4-三唑重排为相应的 1-甲基-3,5-二芳基-1H-1,2,4-三唑所表现出的区域选择性与 3,5-二芳基-1H-1,2,4-三唑的烷基化所观察到的区域选择性相当。这为所提出的涉及连续亲核置换步骤的重排机理提供了支持。