An efficient method to synthesize TNAD by the nitration of 1,4,5,8-tetraazabicyclo-[4,4,0]-decane with N2O5 and acidic ionic liquids
作者:Xiao-Feng Cao、Bin-Dong Li、Min Wang
DOI:10.1016/j.cclet.2013.12.015
日期:2014.3
An experimental study was carried out on the direct nitration of 1,4,5,8-tetraaza-bicyclo-[4,4,0]-decane to synthesize 1,4,5,8-tetranitro-1,4,5,8-tetraazabicyclo-[4,4,0]-decane (TNAD) with N2O5 catalyzed by acidic ionic liquids. Various ionic liquids, such as [HMim]X, [(CH2)(4)SO(3)HMim]X and [Capl]X (X- = pTSO(-), NO3-, HSO4-), and various parameters such as equivalents of ionic liquid, molar ratio of N2O5 to the starting material, reaction time and temperature, and solvent were investigated. Ionic liquid [(CH2)(4)SO(3)HMim]HSO4 showed better catalytic activity. In the presence of 3% molar ratio of [(CH2)(4)SO(3)HMim]HSO4 ionic liquid to the staring material, the yield of 1,4,5,8-tetranitro-1,4,5,8-tetraazabicyclo-[4,4,0]-decane was improved by 6.2% compared to the system without ionic liquid. (C) 2013 Bin-Dong Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.