Diisopropylethylamine → 1-[4-[2-(Difluoromethyl)-4-methoxy-1h-benzimidazol-1-yl]-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-n-[2-(dimethylamino)ethyl]-4-piperidinesulfonamide

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Reaction Steps

The above carbamate was hydrogenated over 5% Pd on carbon in MeOH. After removal of the solvent, the residue was combined with 0.48 g (1.2 mmol) 1-[4-chloro-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-2-(difluoromethyl)-4-methoxy-1H-benzimidazole (Example 2) and 0.35 g (2.7 mmol) DIPEA in THF. The mixture was heated under reflux for 1 hr and the solvent was concentrated. After dilution with water, the resulting solid was collected and dried. Chromatography on alumina, eluting with EtOAc, gave 1-[4-[2-(difluoromethyl)-4-methoxy-1H-benzimidazol-1-yl]-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-N-[2-(dimethylamino)ethyl]-4-piperidinesulfonamide: mp (MeOH) 231-234° C.; 1H NMR (CDCl3) δ 7.87 (dd, J=8.4, 0.6 Hz, 1H), 7.47 (t, JHF=53.5 Hz, 1H), 7.35 (t, J=8.2 Hz, 1H), 6.81 (d, J=7.8 Hz, 1H), 4.91 (br d, J=13.3 Hz, 2H), 4.04 (s, 3H), 3.88 (m, 4H), 3.78 (m, 4H), 3.25-3.17 (m, 3H), 3.00 (m, 2H), 2.45 (br t, J=5.7 Hz, 2H), 2.27 (m, 2H), 2.23 (s, 6H), 1.83 (dq, J=12.5, 4.4 Hz, 2H); Anal. Calcd. for C25H35F2N9O4S: C, 50.4; H, 5.9; N, 21.2. Found: C, 50.2; H, 5.7; N, 21.3%.

Provenance & Evidence