Oxidation of 4-phenyl-1-pivaloylsemicarbazide leads to the formation of two structural isomers: 5-tert-butyl-5-hydroxy-4-phenyl-4,5-dihydro-3H-1,2,4-triazol-3-one and 1-tert-butyl-4-phenyl-1,2,4-triazolidine-3,5-dione. Isomerization of 5-tert-butyl-5-hydroxy-4-phenyl-4,5-dihydro-3H-1,2,4-triazol-3-one to 1-tert-butyl-4-phenyl-1,2,4-triazolidine-3,5-dione proceeds upon heating and is accompanied by the migration of the tert-butyl group from the carbon atom to the nitrogen atom.

中文翻译：

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通过4-苯基-1-新戊酰氨基脲的氧化形成1,2,4-三唑衍生物

4-苯基-1-新戊酰氨基脲的氧化导致形成两种结构异构体：5-叔丁基-5-羟基-4-苯基-4,5-二氢-3 H -1,2,4-三唑-3 -一和1-叔丁基-4-苯基-1,2,4-三唑烷-3,5-二酮。5-叔丁基-5-羟基-4-苯基-4,5-二氢-3 H -1,2,4-三唑-3-酮异构化为1-叔丁基-4-苯基-1,2 1,4-三唑烷-3,5-二酮在加热时进行，并伴随着叔丁基从碳原子向氮原子的迁移。