Reaktion #79610

Reaktionsgleichung

H2O

2-bromo-3-nitrobenzoic acid

iodomethane

potassium carbonate

→

methyl 2-bromo-3-nitrobenzoate

Ausbeute 96.0%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   FiltrationThe resultant precipitate was collected by filtration
2. 2
   Sonstigedried in vacuo

Vorschrift

A solution of 2-bromo-3-nitrobenzoic acid (28.4 g, 115.0 mM), iodomethane (18.0 g, 127 mM), and potassium carbonate (19.0 g, 137.4 mM) in 100 mL DMF was stirred at room temperature for 72 hours. The mixture was poured into 1.5 liters of H2O. The resultant precipitate was collected by filtration and dried in vacuo to afford 28.79 g (96%) of methyl 2-bromo-3-nitrobenzoate as a white solid. 1H NMR (DMSO-d6) δ8.3 (dd, 1H, J=1 and 8 Hz), 7.9 (dd, 1H, J=1 and 8 Hz), 7.7 (t, 1H, J=8 Hz), and 3.9 (s, 3H). IR (KBr, cm−1) 2950, 1738, 1541, 1435, 1364, 1298, and 1142. MS (FD) m/e 259, 261.

Quelle