反应详情

温度

90 °C

6-Bromo-[1,2,4]triazolo[1,5-a]pyridine (600 mg, 3.03 mmol) was added to a mixture of the boronate ester from step E (873 mg, 1.68 mmol), cesium carbonate (1.97 g, 6.06 mmol) in DMF (60 mL) and water (12 mL). The reaction mixture was deoxygenated with argon. Dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium(II) dichloromethane adduct (82 mg, 0.10 mmol) was added and the reaction mixture was stirred at 90° C. for 1 hour, cooled, diluted with water, and extracted with dichloromethane (3×). The combined organic extracts were washed with brine, dried over anhydrous sodium sulfate, and concentrated. Purification by flash column chromatography (0 to 100% 90:9:1 dichloromethane/methanol/concentrated ammonium hydroxide solution in dichloromethane) gave the desired 4-(3,4-dichlorophenyl)-7-([1,2,4]triazolo[1,5-a]pyridin-6-yl)-1,1-dimethyl-1,2,3,4-tetrahydroisoquinoline (431 mg, 50% over 2 steps): 1H NMR (CDCl3, 500 MHz) 1H NMR (CDCl3, 500 MHz) δ 8.79 (s, 1H), 8.38 (s, 1H), 7.84 (d, J=9.0 Hz, 1H), 7.77 (dd, J=8.0, 1.5 Hz, 1H), 7.48 (s, 1H), 7.39 (d, J=8.5 Hz, 1H), 7.31 (dd, J=8.0, 1.5 Hz, 1H)), 7.21 (d, J=1.5 Hz, 1H), 6.99-6.92 (m, 2H), 4.08 (t, J=5.5 Hz, 1H), 3.45 (dd, J=13.5, 5.5 Hz, 1H), 3.10 (dd, J=13.5, 5.5 Hz, 1H), 1.68 (s, 3H), 1.60 (s, 1H), 1.57 (s, 3H); ESI MS m/z 423 [M+H]+.

1. customThe reaction mixture was deoxygenated with argon
2. temperaturecooled
3. extractionextracted with dichloromethane (3×)
4. washThe combined organic extracts were washed with brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated
7. customPurification by flash column chromatography (0 to 100% 90:9:1 dichloromethane/methanol/concentrated ammonium hydroxide solution in dichloromethane)