Sodium Bicarbonate → Tert-butyl 4-(((4-methyl-5-phenyl-4h-1,2,4-triazol-3-yl)methyl)(5,6,7,8-tetrahydroquinolin-8-yl)amino)butylcarbamate

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-methyl-5-phenyl-4H-1,2,4-triazole-3-carbaldehyde, 36, (0.41 g, 2.20 mmol) in 1,2-dichloroethane (4 mL) was added tert-butyl 4-(5,6,7,8-tetrahydroquinolin-8-ylamino)butylcarbamate, 3, (0.76 g, 2.40 mmol), sodium triacetoxyborohydride (0.84 g, 3.95 mmol), and AcOH (10 drops). The reaction mixture was heated to 65° C. and stirred for 18 h. The reaction mixture was cooled to room temperature and poured into saturated aqueous NaHCO3 (15 mL) and extracted with ethyl acetate (2×10 mL). The combined organic phases were washed with brine then dried over MgSO4, filtered, and concentrated in vacuo. The crude material was purified by silica gel chromatography (0-5% methanol/dichloromethane) to yield 37: 1H NMR (400 MHz, CDCl3) δ 8.40, (d, J=5.2 Hz, 1H), 7.60-7.57 (m, 2H), 7.48-7.44, (m, 3H), 7.31, (d, J=7.2 Hz, 1H), 7.0, (dd, J=8.0, 5.2 Hz, 1H), 5.01, (bs, 1H), 4.20-3.92, (m, 3H), 3.20-2.60, (m, 6H), 2.20-1.85, (m, 4H), 1.75-1.30 (m, 13H); ESI+ MS: m/z (rel intensity) 491 (100, M+H).

Provenance & Evidence