反应详情

A mixture of tert-butyl 1-[4-chloro-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-2-(difluoromethyl)-4-methoxy-1H-benzimidazol-6-yl-carbamate (0.333 g, 0.65 mmol), 1-(methylsulfonyl)piperazine (0.32 g, 2 mmol), and DIPEA (0.17 g, 1.3 mmol) in THF (50 mL) was heated under reflux for 3 hrs. The solution was concentrated and then diluted with 100 mL of water containing 1% HOAc to give a solid, which was collected and dried. Chromatography on silica eluting with CH2Cl2/EtOAc (4:1), followed by recrystallization from MeOH, gave 0.33 g (79% yield) of tert-butyl 2-(difluoromethyl)-4-methoxy-1-[4-[4-(methylsulfonyl)-1-piperazinyl]-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-1H-benzimidazol-6-ylcarbamate: mp 223° C. (decomp.); 1H NMR (CDCl3) δ 8.63 (br s, 1H), 7.44 (t, JHF=53.6 Hz, 1H), 6.62 (br s, exchangeable with D2O, 1H), 6.35 (d, J=1.7 Hz, 1H), 4.09-3.80 (m, 15H), 3.35 (m, 4H), 2.80 (s, 3H), 1.52 (s, 9H); Anal. Calcd. for C26H35F2N9O6S: C, 48.8; H, 5.5; N, 19.7. Found: C, 48.9; H, 5.6; N, 19.9%.

1. temperaturewas heated
2. temperatureunder reflux for 3 hrs
3. concentrationThe solution was concentrated
4. additiondiluted with 100 mL of water containing 1% HOAc
5. customto give a solid, which
6. customwas collected
7. customdried
8. customChromatography on silica eluting with CH2Cl2/EtOAc (4:1), followed by recrystallization from MeOH