تفاعل #72503
ord-6e2029ba04564da5a8f309af0ef185a6
معادلة التفاعل
المتفاعلات
الكواشف
المذيبات
ظروف التفاعل
المعالجة
- 1workup.STIRRINGthe mixture stirred at room temperature for an additional 3 hours
- 2غسيلwashed with saturated aqueous sodium bicarbonate solution (50 mL) and brine (50 mL)
- 3تجفيفThe organic phase was dried over sodium sulfate
- 4ترشيحfiltered
- 5تركيزconcentrated in vacuo
- 6أخرىThe crude product was purified by flash chromatography (SiO2, gradient: 50% ethyl acetate in hexanes to 100% ethyl acetate)
الإجراء التجريبي
To a solution of the 4-(9H-benzo[f]pyrido[2,3-b][1,2,4]triazolo[4,3-d][1,4]diazepin-3-yl)benzoic acid (0.5 g, 1.4 mmol) in DMF (5 mL) was added HBTU (0.56 g, 1.4 mmol) follwed by triethylamine (0.392 mL, 2.8 mmol). The reaction mixture was stirred at room temperature for 15 minutes then tert-butyl piperidin-4-ylcarbamate (0.31 g, 1.5 mmol) was added and the mixture stirred at room temperature for an additional 3 hours. The mixture was diluted with ethyl acetate (50 mL) and washed with saturated aqueous sodium bicarbonate solution (50 mL) and brine (50 mL). The organic phase was dried over sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by flash chromatography (SiO2, gradient: 50% ethyl acetate in hexanes to 100% ethyl acetate). The tert-butyl (1-(4-(9H-benzo[f]pyrido[2,3-b][1,2,4]triazolo[4,3-d][1,4]diazepin-3-yl)benzoyl)piperidin-4-yl)carbamate was obtained as a white solid (0.478 g, 63%). M.p.=196-202° C.; 400 MHz 1H NMR (DMSO-d6) δ: 8.81 (br.s, 1H), 8.22 (dd, J=4.4, 1.6 Hz, 1H), 7.97 (dd, J=7.6, 1.6 Hz, 1H), 7.52-7.4 (m, 5H), 7.35 (d, J=8.0 Hz, 1H), 7.19 (dd, J=8.0, 1.2 Hz, 1H), 7.14 (dd, J=7.6, 1.2 Hz, 1H), 6.93 (dd, J=8.0, 1.6 Hz, 1H), 6.89 (br.s, 1H), 4.35-4.25 (m, 1H), 3.6-3.45 (m, 2H), 3.2-3.05 (m, 1H), 3.02-2.9 (m, 1H), 1.9-1.65 (m, 2H), 1.38 (s, 9H), 1.35-1.15 (m, 2H); LCMS [M+H]: 538.