Using of Fe/ HCl

Fox, B. A.; Threlfall, T. L. (1973). "2,3-Diaminopyridine". Org. Synth. ; Coll. Vol., 5, p. 346

See also: See Bechamp reduction

As well as, Sodium hydrosulfite

Redemann, C. T.; Redemann, C. E. (1955). "5-Amino-2,3-dihydro-1,4-phthalazinedione". Org. Synth. ; Coll. Vol., 3, p. 69

Zn/ HCl

An efficient Fe/CaCl2 system enables the reduction of nitroarenes and reductive cleavage of azo compounds by catalytic transfer hydrogenation in the presence of sensitive functional groups including halides, carbonyl, aldehyde, acetyl, nitrile, and ester substituents with excellent yields. The simple experimental procedure and easy purification make the protocol advantageous.

S. Chandrappa, T. Vinaya, T. Ramakrishnappa, K. S. Rangappa, Synlett, 2010, 3019-3022.

 using of Fe in acetic acid or HCl

Han, Ying; Deng, Yu; Yuan, Yu; Zhang, Yang, Faming Zhuanli Shenqing (2013), CN 102887899 A 20130123.

Using of Fe and Ultrasonic irradiatin.

Gamble, Allan B.; Garner, James; Gordon, Christopher P.; O'Conner, Sean M. J.; Keller, Paul A.,Synthetic Communications (2007), 37(16), 2777-2786.

Find in attached, a paper on: Recyclable aluminium oxy-hydroxide supported

Pd nanoparticles for selective hydrogenation of nitro compounds via sodium borohydride hydrolysis

Haydar Go¨ksu

New J. Chem., 2015, 39, 8498--8504

Find in this paper:

General procedure for the catalytic reduction of nitro

compounds via NaBH4 hydrolysis

The nitro and/or nitrile compounds (1 mmol), Pd/AlO(OH)

catalyst (25 mg, 0.001 mmol Pd), and 1 ml of water/methanol

(v/v = 7/3) were stirred in a 100 ml sealed tube at room

temperature. Next, NaBH4 (3 mmol) was added to the reaction

mixture. The reaction then continued while being vigorously

stirred at room temperature. The progress of the catalytic reaction

wasmonitored by thin-layered chromatography (TLC).Most of the

reactions were completed over a time period of 0.75–13 min. The

nitro groups were reduced, while the nitrile groups were not. After

completion of the reaction, the Pd/AlO(OH) catalyst was recovered

from the reaction media by simple centrifugation, washed with

ethanol, dried under atmospheric conditions. The solvent was

removed using a rotary evaporator. Finally, the crude residue was

directly purified by rapid column chromatography on silica gel

using ethyl acetate/hexane. The yields of the reduced compounds

were determined by 1H and 13C nuclear magnetic resonance

(NMR) spectroscopy using D2O, DMSO, CD3OD or CDCl3 as the

solvent, depending on the separated product.

Vasicine, an abundantly available quinazoline alkaloid from the leaves of Adhatoda vasica, enables an efficient metal- and base-free reduction of nitroarenes to the corresponding anilines in water. The chemoselective method tolerates a wide range of reducible functional groups, such as ketones, nitriles, esters, halogens, and heterocyclic rings. Dinitroarenes are reduced selectively to the corresponding nitroanilines.

S. Sharma, M. Kumar, V. Kumar, N. Kumar, J. Org. Chem., 2014, 79, 9433-9439.

(Ph3P)3RuCl2 is an inexpensive catalyst, that enables a chemoselective reduction of alkyne, ketones, or nitro groups in the presence of Zn/water as a stoichiometric reductant. Depending on the nature of the additive and the temperature, chemoselective reduction of a nitro group in the presence of a ketone or an alkyne was possible.

T. Schabel, C. Belger, B. Plietker, Org. Lett., 2013, 15, 2858-2861.

Several bromo, chloro, iodo and multihalogenated nitroarenes have been selectively reduced with hydrazine hydrate in the presence of Pd/C to give the corresponding halogenated anilines in good yield. Using microwave irradiation at elevated temperature and pressure, dehalogenated products can be isolated.

F. Li, B. Frett, H.-y Li, Synlett, 2014, 25, 1403-1408.

A microwave-assisted, palladium-catalyzed catalytic transfer hydrogenation of different homo- or heteronuclear organic compounds using formate salts as a hydrogen source was performed in ([bmim][PF6]. Essentially pure products could be isolated in moderate to excellent yields by simple liquid-liquid extraction.

H. Berthold, T. Schotten, H. Hönig, Synthesis, 2002, 1607-1610.

Find in attached a paper on:

"Selective reduction of aromatic nitro compounds with stannous chloride in non acidic and non aqueous medium"

F.D. Bellamy and K. Ou

Tetrahedron Letters, Voi.25, No.8, pD 839-842, 1984.

i use iron with ammonium chloride in aqueous ethanol or methanol under reflux. very mild method and tolerates many functional groups. Product for me is usually very clean and can be used without purification.

synth. comm. 1992, 22, 3189-3195

http://dx.doi.org/10.1080/00397919208021132

Yes, the method that mentioned by Eugene (using Fe/NH4Cl) in aq.EtOH or MeOH under reflux is effective method for reducing the nitro aromatic coompounds.

Thank You sir Talaat l.El-Emary and Eugene Yang

Aromatic nitro compound can be converted into aromatic amine without hydrogenator using Fe in HCl, or reduction by using Sn/ HCl 

Thank you too Ashawani.