反应详情

A mixture of 2-(1,2,3,4-tetrahydro-2,8-dimethylpyrido[4,3-b]indol-5-yl)ethanamine (100 mg, 0.41 mmol), cyclopentane carboxylic acid (46 mg, 0.41 mmol), N,N′-dicyclohexylcarbodiimide (93 mg, 0.45 mmol) and 4-dimethylaminopyridine (55 m g, 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 to obtain 40 mg of N-(2-(1,2,3,4-tetrahydro-2,8-dimethylpyrido[4,3-b]indol-5-yl)ethyl)cyclopentanecarboxamide 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. 0.5 ml). 1H NMR (DMSO) 9.98-10.09 (bs, 1H), 7.93 (t, 1H), 7.37 (d, 1H), 7.20 (s, 1H), 7.0 (d, 1H), 4.59-4.63 (m, 1H), 4.2-4.3 (m, 1H), 4.07-4.15 (m, 2H), 3.73-3.84 (m, 2H), 3.07-3.15 (m, 2H), 2.99 (s, 3H), 2.59-2.68 (m, 2H), 2.4-2.48 (m, 1H), 2.38 (s, 3H), 1.4-1.84 (m, 8H).

1. filtrationThe reaction mixture was filtered through Celite
2. concentrationconcentrated