Preparation of 4,6-Dinitrobenzofuroxan

The most common general procedure for preparation of benzofuroxans is based on thermolysis of the benzene compound containing adjacent nitro and azido groups in the ortho position [31, 32]. 

6-Dinitrobenzofuroxan can be prepared by thermal decomposition of 1-azido-2,4,6-trinitrobenzene (prepared from l-chlor-2,4,6-trinitrobenzene) [13, 15] or more effectively, without isolation of l-azido-2,4,6-trinitrobenzene, directly from l-chlor-2,4,6-trinitrobenzene [31]. The other method of 4,6-dinitrobenzofuroxan synthesis is based on nitration of benzofuroxan (prepared from o-nitroanUine) [31-33]. 

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