Termal rearrangement of 1-alkyl-3,6-diaryl-1,4-dihydro-s-tetrazines to 1-alkylamino-3,5-diaryl-1,2,4-triazoles
作者:Daniel Hunter、Douglas G. Neilson
DOI:10.1039/p19840002779
日期:——
having aryl substituents in either the 3- or 3,6-positions react readily with alkyl or aryl Grignard reagents to give 1-alkyl (or aryl)-1,4-dihydro-s-tetrazines. The 1-alkyl-1,4-dihydro-s-tetrazines rearrange in methanolic hydrogen chloride to 4-alkylamino-1,2,4-triazoles, but thermolyse readily to the less well known, isomeric 1-alkylamino-1,2,4-triazoles. Possible reaction pathways involving breakdown
小号具有无论是在3-或3,6-位上有烷基很容易反应或芳基格氏试剂芳基取代基-Tetrazines,得到1-烷基(或芳基)-1,4-二氢-小号-tetrazines。的1-烷基-1,4-二氢-小号-tetrazines重新排列甲醇氯化氢〜4 -烷基氨基-1,2,4-三唑,但thermolyse容易向较公知的,异构体的1-烷基氨基-1,2, 4-三唑。讨论了可能的反应途径,包括分解为腈和反应性中间体(例如1,3-偶极物质)。