반응 #540201
ord-104e730fbaa74872874fcd70b91b63c1
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후처리
- 1온도the mixture was heated
- 2온도to reflux for 6 hours
- 3온도to cool to room temperature
- 4여과The suspension was filtered
- 5세척washed with water (50 mL), ethyl acetate (20 mL), ether (50 mL), and suction
- 6기타dried
실험 절차
To a stirred solution of 2-amino-5-(tert-butoxycarbonylamino-methyl)-benzoic acid (9.3 g, 34.9 mmol), imidazole (2.85 g, 41.9 mmol) in acetonitrile (120 mL), was added acetyl chloride (3.0 mL, 41.9 mmol) and stirred at room temp overnight. Then to the mixture, was added 3-amino-piperidine-2,6-dione hydrogen chloride (5.74 g, 34.9 mmol), imidazole (4.76 g, 69.8 mmol) and triphenyl phosphite (11.0 mL, 41.9 mmol), and the mixture was heated to reflux for 6 hours. The mixture was allowed to cool to room temperature, and water (about 400 mL) was added. The suspension was filtered, washed with water (50 mL), ethyl acetate (20 mL), ether (50 mL), and suction dried to give [3-(2,6-dioxo-piperidin-3-yl)-2-methyl-4-oxo-3,4-dihydro-quinazolin-6-ylmethyl]-carbamic acid tert-butyl ester as an off-white solid (9.7 g, 70% yield): HPLC, Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 mL/min, 240 nm, 10/90 CH3CN/0.1% H3PO4, grad. to 95/5 in 5 min, kept 5 min, 5.95 min (96.7%); mp, 212.5-214.5° C.; 1HNMR (DMSO-d6) 1.40 (s, 9H, CMe3), 2.15-2.18 (m, 1H, CHH), 2.57-2.86 (m, 6H, CHCH2, CH3), 4.23 (d, J=6 Hz, 2H, CH2NH), 5.26 (dd, J=6, 11 Hz, 1H, Ch), 7.52 (t, J=6 Hz, 1H, CH2NH), 7.56-7.88 (m, 3H, Ar), 11.03 (s, 1H, NH); 13C NMR (DMSO-d6) δ 20.92, 23.40, 28.20, 30.62, 42.97, 56.52, 77.94, 119.98, 123.50, 126.51, 133.74, 138.76, 145.75, 154.52, 155.79, 160.44, 169.47, 172.61. LCMS MH=401; Anal Calcd For C20H24N4O5: C, 59.99; H, 6.04; N, 13.99. Found: C, 59.83; H, 5.98; N, 13.85.