Preparation and reactivity of mesoionic 1,2,4-triazolo-[4,3-b]-1,2,4-triazole derivatives
作者:P. Molina、A. Lorenzo、R.M. Claramunt、J. Elguero
DOI:10.1016/s0040-4020(01)87630-4
日期:1986.1
A number of mesoionic compounds (2) derivatives of the 1,2,4-triazolo[4,3-]-1,2,4-triazole ring system have been prepared from 4-amino-1 -methyl -3,5-bis(methylthio)- 1,2,4-triazolium cation and aryl isothiocyanates. Compounds ((2) react with methyl iodide to give the methiodides ((3) which undergo ring opening to the monocyclic compounds ((4) through sulfur extrusion under thermal conditions. Methiodides
由4-氨基-1-甲基-3,5-已制备了1,2,4-三唑并[4,3- ]- 1,2,4-三唑环系统的许多中离子化合物(2)衍生物。双(甲硫基)-1,2,4-三唑鎓阳离子和异硫氰酸芳基酯。化合物((2)与碘甲烷反应,得到methiodides ((3) ,其经历开环单环化合物((4)通过在热条件下硫挤出。Methiodides ((3)通过用malononitriIe和盐酸铅顺序处理到吡唑并[5,1- ]-1,2,4-三唑(6)。