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