反应详情

Benzoyl chloride (1.25 mL, 10.70 mmol) was added to a solution of 2-amino-4-chlorothiazole-5-carbaldehyde (1.63 g, 10.00 mmol), pyridine (79.10, 12.30 mmol) and 4-dimethylaminopyridine (10 mg) in tetrahydrofuran (100 mL) at 0° C. The reaction mixture was stirred at ambient temperature overnight and then concentrated. Purification of the residue by column chromatography afforded N-(4-chloro-5-formylthiazol-2-yl)benzamide in 19% yield (0.52 g); 1H NMR (CDCl3, 300 MHz) δ 10.0 (s, 1H), 8.28-7.45 (m, 5H); MS (ES+) m/z 267.1 (M+1).

1. concentrationconcentrated
2. customPurification of the residue by column chromatography