ChemicalBook CAS DataBase List 4-Nitrobenzylamine hydrochloride

4-Nitrobenzylamine hydrochloride synthesis

6synthesis methods

Product Name:4-Nitrobenzylamine hydrochloride
CAS Number:18600-42-5
Molecular formula:C7H9ClN2O2
Molecular Weight:188.61

619-72-7

18600-42-5

General procedure for the synthesis of 4-nitrobenzylamine hydrochloride from p-nitrobenzonitrile: To a 6.0 mL solution of toluene containing p-nitrobenzonitrile (1.0 g, 5.1 mmol, 1.0 eq.) under nitrogen protection was added TMDS (900 μL, 5.1 mmol, 1.0 eq.) or PMHS (610 μL, 10.2 mmol, 2.0 eq.) and Ti(Oi-Pr)4 (1.5 mL, 5.1 mmol, 1.0 eq.). The reaction mixture was heated at 60 °C for 24 h, during which the colorless solution gradually changed to black, and the reaction progress could be monitored by TLC or 1H NMR. Upon completion of the reaction, the mixture was cooled to room temperature and acidified with 1 M aqueous HCl (7.7 mL, 1.5 eq.) to obtain a clarified solution. Subsequently, the crude product was concentrated under reduced pressure, and the resulting solid was filtered and washed with pentane (3 x 50 mL). The washed solid was dissolved in ethanol and finally the filtrate was concentrated under reduced pressure to give the target product 4-nitrobenzylamine hydrochloride.

619-72-7 Synthesis

619-72-7
380 suppliers
$11.00/1g

18600-42-5
147 suppliers
$9.00/250mg

Yield:18600-42-5 90%

Reaction Conditions:

Stage #1:4-nitrobenzonitrile with C₄₆H₁₇₈O₄₁Si₄₂;titanium(IV)isopropoxide in toluene at 60; for 9 h;Inert atmosphere;
Stage #2: with hydrogenchloride;water in toluene at 20;Inert atmosphere;chemoselective reaction;Reagent/catalyst;

Steps:

3 4.2. General procedure for the reduction of nitriles
General procedure: To a nitrogen purged screw-caped vial containing 1a (1.0 g, 5.1 mmol, 1.0 equiv) in 6.0 mL of toluene were added TMDS (900 μL, 5.1 mmol, 1.0 equiv) or PMHS (610 μL, 10.2 mmol, 2.0 equiv) and Ti(Oi-Pr)₄ (1.5 mL, 5.1 mmol, 1.0 equiv) at rt. The mixture was then heated at 60 °C for 24 h (the colorless solution turned into black and the conversion of the substrate can be followed up by TLC and/or ¹H NMR). After cooling to rt, the clear solution was acidified using aqueous 1 M HCl (7.7 mL, 1.5 equiv) and the crude mixture was concentrated under reduced pressure. The resulting solid was filtered, washed with pentane (3*50 mL), and dissolved in ethanol. The filtrate was finally concentrated under reduced pressure affording the amine 2a as a hydrochloride salt.

References:

Laval, Stéphane;Dayoub, Wissam;Pehlivan, Leyla;Métay, Estelle;Favre-Reguillon, Alain;Delbrayelle, Dominique;Mignani, Gérard;Lemaire, Marc [Tetrahedron,2014,vol. 70,# 4,p. 975 - 983] Location in patent:supporting information

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