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With thionyl chloride; for 1h;Heating / reflux; |
The 4-chloro-3-iodo-benzoyl chloride used as a starting material was prepared as follows: EPO <DP n="39"/>Thionyl chloride (10 ml) was added to 4-Chloro-3-iodo-benzoic acid (1.13 g) and the mixure was refluxed for 1 hour. The reaction mixture was evaporated to give a solid (1.20 g);1H NMR: (400 MHz, CHLOROFORM-J) delta ppm 7.59 (d, 1 H) 8.03 (dd, 1 H) 8.57 (d, 1 H) |
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With oxalyl dichloride; N,N-dimethyl-formamide; In dichloromethane; at 0 - 20℃; for 1.5h; |
Example 50: 4-Chloro-3-(9H-pyrimido[4,5-b]indol-7-yl)-N-[3-(trifluoromethyl)phenyl]- benzamideStep 1: 4-Chloro-3-iodo-N-[3-(trifluoromethyl)phenyl]benzamide4-Chloro-3-iodobenzoic acid (1.00 g, 0.00354 mol) was slurried in DCM (9 mL) and was cooled at 0 0C. To the mixture was added DMF (27 muL, 0.00035 mol) followed by oxalyl chloride (0.449 mL, 0.00531 mol). The resulting mixture was stirred at 0 0C for 30 minutes and then was warmed to 20 0C and was stirred for 60 minutes, by which time solution had occurred. LCMS of a sample quenched in methanol showed clean formation of the methyl ester (M+H 297/299, 3:1). The reaction mixture was concentrated to remove the excess oxalyl chloride providing acid chloride as a yellow solid acid. To the product was added DCM (1OmL), 3-(trifluoromethyl)benzenamine (0.484 mL, 0.00389 mol), then DIPEA (0.925 mL, 0.00531 mol). After 16 h, LCMS showed clean conversion to the expected M+H 426/428 (3:1). The reaction was quenched into 10percent citric acid, and the resulting mixture was extracted with DCM. The organic layer was washed with water, then <n="70"/>saturated NaHCCh, and dried (Na2SOzO. To the dried organic layer was added an equal volume of hexane and this mixture was concentrated using a rotary evaporator to remove most or all of the DCM. The resulting solid was filtered, rinsed with hexane and air dried to give 1.29 g off-white solid amide. |
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With oxalyl dichloride;N,N-dimethyl-formamide; In dichloromethane; at 20℃; for 3h; |
3-(4-Chloro-3-iodo-phenyl)-5-methanesulfonyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine. To a solution of the above piperidone (10 g, 56 mmol) and p-toluenesulfonic acid (40 mg) in benzene (60 mL) was added morpholine (4.9 mL, 56 mmol). The reaction mixture was heated in a flask equipped with a condenser and a Dean-Stark trap at 90° C. for 16 h. The reaction mixture was cooled and concentrated to give the desired enamine as a beige solid, which was used without further purification. The enamine was dissolved in CH2Cl2 (40 mL), treated with TEA (9.4 mL, 67.2 mmol), and cooled to 0° C. To this solution was added 4-chloro-3-iodobenzoyl chloride* (16.9 g, 56 mmol). The reaction mixture was allowed to warm to rt, stirred for 14 h, and then concentrated. The resulting red oil was diluted with EtOH (56 mL) and treated with hydrazine (5.34 mL, 170 mmol) at 0° C. The resulting slurry was allowed to warm to rt and stirred for 16 h. EtOAc (120 mL) was added, and after 2 h the resulting precipitate was filtered and washed with additional EtOAc to afford the desired product as a white solid (8.80 g, 36percent). HPLC: Rt=6.08. MS (ESI): mass calcd. for C13H13ClIN3O2S, 437.7; m/z found, 438.1 [M+H]+. 1H NMR (DMSO-d6): 8.05 (d, J=1.9, 1H), 7.51 (d, J=8.3, 1H), 7.43 (dd, J=8.4, 1.9, 2H), 4.30 (s, 2H), 3.36 (t, J=5.8, 2H), 3.30 (br s, 1H), 2.86 (s, 3H), 2.69 (t, J=5.6, 2H).*Prepared by dissolving <strong>[42860-04-8]4-chloro-3-iodobenzoic acid</strong> (15.8 g, 56 mmol) in CH2Cl2 (40 mL) and treating with oxalyl chloride (4.1 mL, 46.7 mmol) and a catalytic amount of DMF (0.40 mL; vigorous gas evolution). The mixture was stirred at rt for 3 h. The reaction mixture was concentrated to afford a white solid, which was used without further purification. |
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With oxalyl dichloride; N,N-dimethyl-formamide; In dichloromethane; at 0 - 20℃; for 3h; |
General procedure: To a solution of 3-iodo-4-methylbenzoic acid 5?1 (262mg, 1.0mmol) in dry DCM (10mL) at 0°C was added oxalyl chloride (0.13mL, 1.5mmol) and 3 drops of dry DMF. The resulting reaction mixture was stirred at room temperature for 3h, and then the solvent was removed under reduced pressure. The crude product was used directly for the next step without further purification. |