Hydrazine hydrate (1:1) → N1-(5,6-dimethyl-1H-benzimidazol-2-ylmethyl)-N1-(5,6,7,8-tetrahydro-quinolin-8-yl)-butane-1,4-diamine

Participants

Reaction Steps

To a stirred solution of 2-{4-[(5,6-dimethyl-1H-benzimidazol-2-ylmethyl)-(5,6,7,8-tetrahydro-quinolin-8-yl)-amino]-butyl}-isoindole-1,3-dione (60 mg, 0.118 mmol) in ethanol (2.5 mL) was added hydrazine hydrate (0.05 mL, 1.03 mmol) and the mixture stirred at room temperature for 16 hours. The mixture was then diluted with diethyl ether, dried (MgSO4), filtered and concentrated under reduced pressure to give a crude yellow oil. The oil was purified by flash chromatography (1.75 cm ID, 12 g silica, 10:1:1 CH2Cl2:MeOH:NH4OH) to give pure N1-(5,6-dimethyl-1H-benzimidazol-2-ylmethyl)-N1-(5,6,7,8-tetrahydro-quinolin-8-yl)-butane-1,4-diamine (18 mg, 38%). 1H NMR (CDCl3) δ 1.30-1.46 (m, 4H), 1.60-1.75 (m, 1H), 1.82-1.96 (m, 1H), 1.98-2.08 (m, 11−1), 2.14-2.24 (m, 1H), 2.35 (s, 6H), 2.47-2.59 (m, 3H), 2.65-2.90 (m, 3H), 3.92-4.06 (m, 3H), 7.13 (dd, 1H, J=7.9, 4.8 Hz), 7.34 (s, 2H), 7.40 (d, 1H, J=7.1 Hz), 8.58 (s, 1H, J=3.5 Hz).

Provenance & Evidence