The synthesis of the energetic compound 4-(4-NITRO-1,2,5-OXADIAZOL-3- YL)-NNO-azoxyl-1,2,5-oxadiazol-3-amine (3) was achieved in two steps from diaminofurazan (1). Compound 3 was characterized by X-ray diffraction. From the X-ray structure a bifurcated intramolecular H-bond between O(2)- H(2)- N(4) was observed. In addition, intramolecular H-bonding was observed between H(1) and N(7) of an adjacent molecule. One molecule of ethanol and one-half molecule of water per molecule of water of 3 was observed in ...
The synthesis of the new high density energetic compound 4,8-dinitro- 12H- 1,2,5 oxadiazolo3,4-E 1,2,5 oxadiazolo3',4':4,5benzotriazolo 1 ,2- Abenzotriazol-13-ium inner salt 1,11-dioxide (7) was achieved in three steps (37% yield) from 2,4,8,10- tetranitrobenzotriazolo1 ,2-Abenzotriazolo-6-ium inner salt (4). The compound 7 was found to be thermally stable up to 274 deg C and was insensitive to impact (hammer/anvil test). p1
The synthesis of 2,6-diethyl-3-methacroyloxymethyl- 1 ,5,7,8- tetramethylpyrromethene- BF2 (2) was prepared in straight forward fashion from 2,6-diethyl-1,3,5,7,8-pentamethylpyrromethene-BF2 (1) in three steps. The monomer unit 2 has been shown to be useful for copolymerization with methyl methacrylate for the synthesis of new solid-state optical materials. In addition, the synthesis of 1 has been modified to give greater yields of this useful laser dye.
The sequential preference of electrophilic attack on the dibenzotetraazapentalene ring system 6 has unequivocally been shown to be in the order of position 2(8) > 4(10) >> 1(7) and 3(9). However, nucleophilic substitution reactions with sodium azide were found to be substrate dependent. Substitution occurred at the 3(9)-position of 9 followed by elimination of hydrogen chloride to give 10 while direct substitution of azide for the 4(10)- nitro group of ...
The reaction of glyoxime (4) and hydroxylamine hydrochloride in aqueous sodium hydroxide was found to be a safe and inexpensive method for the preparation of multigram quantities of diaminoglyoxime (5). Potassium hydroxide mediated dehydration of 5 furnished diaminofurazan (1) in good yield of exceptional purity. The ready availability of 1 and 5 has facilitated the synthesis of new energetic furazan derivative MNOTO (B). jg
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