P-Anisidine → 2-Bromo-4-methoxyaniline

To a solution of p-anisidine (10 g, 0.08 mol) and sodium carbonate (17.2 g, 0.16 mol) in dichloromethane (400 ml) was added a solution of bromine (3.8 ml), 0.072 mol) in dichloromethane (200 ml) dropwise. The reaction was stirred at ambient temperature for 45 minutes, diluted with dichloromethane (200 ml) and washed with water (2×200 ml). The organic layer was dried over magnesium sulphate, and the solvent was removed in vacuo to yield a dark brown oil. Chromatography on silica eluting with a gradient of ethyl acetate in hexane (10%, 15% and 20%) afforded the title compound as a dark red oil (4 g, 25%), m/z (ES+) 202 (M30 +H, 100%). 1H NMR (250 MHz, CDCl3) δ 3.73 (3H, s), 3.78 (2H, broad s), 6.72 (2H, t, J 1.2 Hz), 7.00 (1H, q, J 1.26 Hz).

1. washwashed with water (2×200 ml)
2. dry with materialThe organic layer was dried over magnesium sulphate
3. customthe solvent was removed in vacuo
4. customto yield a dark brown oil

ORD record

ord-9bf65b495fb04880afd4312aed67c49e

Source dataset

uspto-grants-2000_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06046195