- Efficient synthesis of: N -methyltetranitropyrrole: A stable, insensitive and high energy melt-castable material
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1-Methyl-2,3,4,5-tetranitropyrrole, a potential high energy density material, first reported in 1979 in only 0.28% overall yield, has been synthesized efficiently (in more than 5% overall yield) by following two alternate routes from 1-(triisopropylsilyl)pyrrole and 1-methylpyrrole. Detailed characterization shows that it is stable up to 196 °C and possesses a density of 1.93 g cm-3. The corresponding velocity of detonation and detonation pressure are 8950 m s-1 and 36.9 GPa, respectively. These values are slightly better than those of RDX, whereas, its sensitivity towards impact and friction are much lower than that of RDX. In addition, its melting point of 100 °C further highlights its potential as a melt castable material in a high energy formulation.
- Thaltiri, Vikranth,Chavva, Kurumurthy,Kumar, B. Sathish,Panda, Pradeepta K.
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- PREPARATIVE ASPECTS OF THE NITRATION OF 1-METHYLPYRROLE DERIVATIVES. 13C NMR OF SOME NITROPYRROLES.
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The nitration of 1-methylpyrrole and 1,2-dimethylpyrrole was studied and the products were characterized. It was found that the nitration of ethyl 1-methylpyrrole-2-carboxylate depends on the reaction conditions. **1**3C parameters have been determined for several 1-methyl substituted pyrrole- and nitropyrrole derivatives and the relationship between the observed and predicted **1**3C shifts for aromatic carbons is briefly discussed. It has been found that the determination of the direct **1**3C-**1H coupling constants in the pyrrole ring constitutes a useful tool for distinguishing alpha - and beta -positions.
- Grehn
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