反应详情

Sodium methoxide (33 mg, 0.620 mmol) was added to a stirring slurry of methyl 3-(2-(4-fluorophenyl)-3-(methylcarbamoyl)benzofuran-5-yl)benzoate (50 mg, 0.124 mmol) and (Z)-N′-hydroxyisobutyrimidamide (38 mg, 0.372 mmol) in EtOH (2.5 mL) at rt. The mixture was subjected to microwave irradiation for 5 min at 160° C. The mixture was concentrated and purified by preparative reverse phase HPLC on a C18 column using a suitably buffered H2O/CH3CN gradient, and concentrated to give the titled compound (11 mg, 20%). 1H NMR (400 MHz, DMSO-d6) d ppm 8.46-8.54 (1H, m), 8.35 (1H, s), 8.11 (1H, d, J=7.78 Hz), 7.97-8.08 (3H, m), 7.92-7.97 (1H, m), 7.73-7.84 (3H, m), 7.40 (2H, t, J=8.91 Hz), 3.12-3.23 (1H, m), 2.87 (3H, d, J=4.52 Hz), 1.36 (6H, d, J=7.03 Hz). LC-MS retention time: 1.80 min; m/z (MH+): 456. LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Waters XBridge 5 u C18 4.6×50 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 5 ml/min, a gradient of 100% solvent A/0% solvent B to 0% solvent A/100% solvent B, a gradient time of 2 min, a hold time of 1 min, and an analysis time of 3 min where solvent A was 5% acetonitrile/95% H2O/10 mM ammonium acetate and solvent B was 5% H2O/95% acetonitrile/10 mM ammonium acetate. MS data was determined using a Micromass Platform for LC in electrospray mode. Additional HPLC method: Solvent A=5% CH3CN/95% H2O/0.1% TFA, Solvent B=95% CH3CN/5% H2O/0.1% TFA, Start % B=10, Final % B=100, Gradient time=15 min, Stop time=18 min, Flow Rate=1 ml/min. Column: Waters Sunfire C-18, 4.6×150 mm, 3.5 mm, Rt=16.33 min, purity=99%; Column: Waters Xbridge Phenyl column 4.6×150 mm, 3.5 mm, Rt=13.72 min, purity=99%.

1. customirradiation for 5 min at 160° C
2. concentrationThe mixture was concentrated
3. custompurified by preparative reverse phase HPLC on a C18 column
4. concentrationconcentrated