magnified image5,6‐Dinitro and 5,6‐diaminobenzimidazolone‐2 can be synthesized at a sufficiently high purity and yield to permit its large scale production in an economically feasible manner. The results of our studies derived optimum conditions for the nitration process necessary to obtain pure 5,6‐dinitriobenzimidazolone‐2. J. Heterocyclic Chem. (2009).
Pyrazine and 5-sulfosalicylic acid crystallize from a methanol solution containing water as the title salt, C4H6N2
2+·2C7H5O6S−·2H2O. The pyrazinediium cation sits on an inversion center. The component ions and water molecules are linked by intermolecular O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds into layers running parallel to the (10) plane.
Benzimidazole derivatives R 0200Synthesis and Characteristic of 5,6-Dinitro and 5,6-Diaminobenzimidazolone-2.-The conditions for the nitration reaction are optimized. Both nitration and subsequent reduction processes are suitable for large-scale production. -(YANG*, Z.; WANG, J.; LI, L.; YE, C.; LIU, H.; J. Heterocycl. Chem. 46 (2009) 4, 788-790; Coll. Chem. Eng., Ningbo Univ. Technol., Ningbo 315016, Peop. Rep. China; Eng.) -H. Haber 49-126
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