3-Chloro-4-methylaniline → 5-Chloro-2-iodo-4-methylaniline

Beteiligte Stoffe

Reaktionsschritte

3-Chloro-4-methylaniline (1.50 g, 10.6 mmol) and benzyltrimethylammonium dichloroiodate (4.60 g, 13.2 mmol) were dissolved in CH2Cl2 (50 mL) and MeOH (20 mL), then CaCO3 (3.10 g, 31.0 mmol) was added and the reaction stirred at room temperature overnight. The reaction was diluted with Et2O (200 mL), filtered through Celite®, and concentrated. The crude material was purified by column chromatography using 97.5/2.5 hexane/EtOAc, giving the product (1.80 g, 63%) as light tan solids. MS (DCI) m/e 268 and 270 (M+H)+; 1H NMR (300 MHz, CDCl3) δ 7.48 (s, 1H), 6.76 (s, 1H), 4.00 (v br s, 2H), 2.22 (s, 3H).

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