反应详情

A mixture of 2-(1,2,3,4-tetrahydro-2,8-dimethylpyrido[4,3-b]indol-5-yl)ethanamine (0.1 g, 0.41 mmol), 4-fluoro benzoic acid (57 mg, 0.41 mmol), N,N′-dicyclohexylcarbodiimide (93 mg, 0.45 mmol) and 4-dimethylaminopyridine (55 mg, 0.45 mmol) in dry dichloromethane (2.5 ml) were stirred at room temperature for 3 h. The reaction mixture was filtered through Celite and concentrated by rotary evaporation to obtain 19.22 mg of 4-fluoro-N-(2-(1,2,3,4-tetrahydro-2,8-dimethylpyrido[4,3-b]indol-5-yl)ethyl)benzamide as TFA salt after purification by reverse-phase chromatography (C-18, 500 mm×50 mm, Mobile Phase A=0.05% TFA in water, B=0.05% TFA in acetonitrile, Gradient: 10% B to 80% B in 30 min, injection vol. 5 ml). 1H NMR (DMSO) 9.98 (bs, 1H), 8.72 (t, 1H), 7.80-7.84 (m, 2H), 7.45 (d, 1H), 7.25-7.30 (m, 2H), 7.20 (s, 1H), 7.0 (d, 1H), 4.50-4.59 (m, 1H), 4.17-4.30 (m, 2H), 3.73-3.80 (m, 2H), (3.50-3.59 (m, 3H), 3.05-3.15 (m, 2H), 2.92 (s, 3H), 2.37 (s, 3H).

1. filtrationThe reaction mixture was filtered through Celite
2. concentrationconcentrated by rotary evaporation