Reaktion #72627

Reaktionsgleichung

5-Methyl-2-nitrobenzonitrile

SnCl2

NaOH

→

title product

Ausbeute 99.7%

2-Amino-5-methylbenzonitrile

Ausbeute 99.7%

Lösungsmittel

HCl

EtOH

Reaktionsbedingungen

Aufarbeitung

1. 1
   ExtraktionThe product was extracted into EtOAc
2. 2
   Waschenwashed with brine
3. 3
   Trocknendried over MgSO4
4. 4
   Einengenconcentrated

Vorschrift

5-Methyl-2-nitrobenzonitrile (1.92 g, 11.84 mmol) was added in portions to a stirred solution of SnCl2 (11.22 g, 59.2 mmol) in conc. HCl (12 mL) and EtOH (12 mL). The reaction temperature was maintained at 20-30° C. using an ice bath. The reaction mixture was then stirred at room temperature for 1 h and poured into an ice cold aqueous solution of NaOH (6N, app. 30 mL) to neutralize to pH7. The product was extracted into EtOAc, washed with brine, dried over MgSO4 and concentrated to provide the title product (1.56 g, 99%) as a yellow-brown solid. 1H NMR (400 MHz, DMSO-d6) δ2.21 (s, 3H), 5.79 (bs, 2H), 6.68-6.71 (d, 1H), 7.10-7.13 (dd, 1H), 7.15 (s, 1H). 13C NMR (DMSO-d6) δ20.13, 93.99, 116.12, 118.94, 125.38, 132.32, 135.76, 150.21. MS 133 (MH+).

Quelle