Morpholine → HCID 178428079, 화합물
반응식
Cl[C:2]1[N:7]=[C:6]2[N:8]([CH2:11][C:12]3[CH:17]=[CH:16][CH:15]=[C:14]([C:18]([F:21])([F:20])[F:19])[C:13]=3[CH3:22])[CH:9]=[N:10][C:5]2=[C:4]([O:23]C)[CH:3]=1.[NH:25]1[CH2:30][CH2:29][O:28][CH2:27][CH2:26]1>>[CH3:22][C:13]1[C:14]([C:18]([F:21])([F:20])[F:19])=[CH:15][CH:16]=[CH:17][C:12]=1[CH2:11][N:8]1[C:6]2=[N:7][C:2]([N:25]3[CH2:30][CH2:29][O:28][CH2:27][CH2:26]3)=[CH:3][C:4]([OH:23])=[C:5]2[N:10]=[CH:9]1참가 물질
3
실험 절차
5-chloro-7-(methyloxy)-3-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-3H-imidazo[4,5-b]pyridine (45 mg, 0.126 mmol) was suspended in 1.5 mL of morpholine in a microwave vial and the mixture was irradiated in a microwave oven at 130° C. for 45 min, then for additional 3 h, another 3 h and then additional 12 h. Product is slowly forming (as observed by LC/MS) going through the formation of the 7-hydroxy derivative first. The mixture was then irradiated for 3 h at 200° C., to provide complete conversion to the desired product. An additional aliquot of 5-chloro-7-(methyloxy)-3-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-3H-imidazo[4,5-b]pyridine (60 mg, 0.169 mmol) was suspended in morpholine (1.5 mL) and irradiated in a microwave oven at 200° C. for 3 h. The reaction was not completed, so it was irradiated again in the microwave at 200° C. for 150 min. The two reaction mixtures were combined and diluted with water and 1 N HCl was added to pH 4-5. The precipitate formed was collected by filtration, washed with water and dried. The solid was dissolved in DMSO and purified by Reverse phase-HPLC (25 to 80% AcCN in water plus 0.1% TFA). Two peaks closely eluted on the HPLC and were isolated for the product. The slower retention time peak presented 2% impurity so it was kept separated. The collected fractions were neutralized by the addition of NaHCO3 sat sol and the solvent volume was reduced to ½-⅓ of the original. The precipitates were collected washed with water and dried in a vacuum oven at 45° C. for 5 h to give 3-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-5-(4-morpholinyl)-3H-imidazo[4,5-b]pyridin-7-ol (21 mg, 0.052 mmol, 17.77% yield) which was submitted for testing, and the less pure sample of 3-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-5-(4-morpholinyl)-3H-imidazo[4,5-b]pyridin-7-ol (18 mg, 0.046 mmol, 15.54% yield), which was stored as is. MS (ES+) m/e 393 (MH+); 1H NMR (400 MHz, DMSO-d6) δ ppm 10.85 (br. s., 1H), 7.99 (s, 1H), 7.62 (d, J=8.08 Hz, 1H), 7.34 (t, J=7.83 Hz, 1H), 7.26 (d, J=7.58 Hz, 1H), 6.07 (s, 1H), 5.41 (s, 2H), 3.57-3.76 (m, 4H), 3.24-3.40 (m, 4H), (CH3 peak under DMSO peak).