Solvent-free reduction of aromatic nitro compounds with alumina-supported hydrazine under microwave irradiation

Simple and efficient reduction of nitroarenes by hydrazine in faujasite zeolites

“…The recyclability of the inorganic solid support is often possible, thus rendering the procedure relatively environmentally acceptable. Varma et al [19] have reported recently a solvent-free microwave reduction protocol that leads to a facile preparation of aromatic amines from the corresponding nitro compounds with hydrazine hydrate supported on solid materials such as alumina, silica gel and clays. Zeolites functionalized with transition metal complexes are also found to be very efficient catalysts for selective transformations [20].…”

One pot synthesis of silver nanoparticles supported on TiO2 using hybrid polymers as template and its efficient catalysis for the reduction of 4-nitrophenol

“…This is because of the possibility of forming many hetero-junctions such as anatase/rutile, Ag/ anatase and Ag/rutile on which electrons can move to improve the activity toward the reduction process [68,69]. In addition, the presence of residual CeO species on the TtevAg 2 catalyst as a result of the non-complete decomposition of the template can do share in the oxidation of Ag o into Ag þ with subsequent reduction of Ag þ by BH 4 À considering that the in situ reduction of Ag þ is very important to this reduction reaction.…”

Recent Uses of Iron (III) Chloride in Organic Synthesis

“…The same system has been used by Samet and co-workers in the synthesis of 4,6-dinitroindole from TNT [46], and Varma and collaborators have used it replacing the solvent by microwave irradiation [47].…”