Triethylamine → N-[3(R,S)-5-Cycloheptyl-2,3-dihydro-1-methyl-2-oxo-1H-1,4-benzodiazepin-3-yl]N'-[3-(N-methyl-N'-piperazinyl)phenyl]urea

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 5-cycloheptyl-1,3-dihydro-1-methyl-3(R,S)-[(4-nitrophenyloxycarbonyl)amino]-2H-1,4-benzodiazepin-2-one (200 mg) in anhydrous dimethylformamide (5 ml), under an atmosphere of nitrogen, was added triethylamine (61 μl). After 2 min a solution of 1-amino-3-(N-methyl-N'-piperazinyl)benzene (85 mg) in anhydrous dimethylformamide (5 ml) was added and the solution heated at 50° C. for 1.5 h. After this time the solvent was evaporated in vacuo and the residue partitioned between ethyl acetate (20 ml) and water (20 ml). An undissolved solid was filtered off and triturated with anhydrous diethyl ether to give the desired urea (128 mg) as a white solid. 1H NMR (360 MHz, D6 -DMSO) δ 1.13-1.94 (12H, m), 2.19 (3H, s), 2.40-2.43 (4H, m), 3.03-3.12 (5H, m), 3.30 (3H, s), 5.04 (1H, d, J=8.4 Hz), 6.49 (1H, dd, 8.1 and 1 Hz), 6.62 (1H, d, J=9.0 Hz), 7.03 (1H, t, J=8.1 Hz), 7.12 (1H, m), 7.22 (1H, d, J=8.4 Hz), 7.38 (1H, dd, J=7.6 and 7.6 Hz), 7.54 (1H, d, J=7.7 Hz), 7.63 (1H, dd, J=8.3 and 8.3 Hz), 7.76 (1H, d, J=7.6 Hz), 8.86 (1H, s). MS (CI, NH3) 502 (M+).

Provenance & Evidence