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Abstract
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Nitro compounds are important due to their applications on the preparation of chemical intermediates for the synthesis of dyes, plastics, perfumes, energetic materials and pharmaceuticals. They have been used as intermediates in various important functional group transformations.1 Nitroolefins as another group of nitro compounds, are widely used in cycloaddition reaction, Diels-Alder reaction and Michael reaction to prepare various organic intermediates. Also, nitroalkanes could be prepared by reduction of nitroolefins.2 Architecture of novel renewable and sustainable nitrating reagent in the organic transformation has attracted much attention in the science and industry because of their unique properties, such as efficiency, reusability, reactivity, stability, selectivity, generality and easy separation of the catalyst.3 These methods of preparation of nitro materials were previously reported in the presence of some various nitrating agents, cocatalysts, and solvents, mixed acid of concentrated nitric acid and sulfuric acid, high temperature, long reaction times, and low yields.4 In this overview, we disclose novel nitrating agents such as poly (vinyl imidazole) sulfonic acid nitrate [PVI-SO3H]NO3 and palladium-catalyzed based on metal-organic frameworks (MOFs) for synthesis of high-value nitro compounds and explosive materials in high yields (Scheme 1).
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