反应详情

(R/S)-2-Hydroxy-2-(4-(5-(1-phenyl-5-(trifluoromethyl)-1H-pyrazol-4-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetic acid (Int-VII, 35 mg, 0.081 mmol), methanamine-HCl (8.24 mg, 0.122 mmol), HATU (40.2 mg, 0.106 mmol), and 4-methylmorpholine (32.9 mg, 0.325 mmol) were added to DMF (1 mL). The reaction mixture was stirred for 1 h and then purified by prep HPLC (PHENOMENEX® Luna 5u 21.2×100 mm, gradient elution with Method 1—MeOH/water containing 0.1% trifluoroacetic acid as defined above, 0% B to 100% B over 12 min, 20 mL/min, 220 nM, product retention 13.0 min) to provide (R/S)-2-hydroxy-N-methyl-2-(4-(5-(1-phenyl-5-(trifluoromethyl)-1H-pyrazol-4-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamide (30 mg, 0.066 mmol, 82% yield): LCMS=444.2 [M+H]+; 1H NMR (400 MHz, methanol-d4) δ ppm 8.46 (1 H, s), 8.07-8.15 (2 H, m), 7.51-7.71(7 H, m), 5.11(1 H, s), 3.35(1 H, s), 2.79 (3 H, s); HPLC peak RT=7.4 min (Method A).

1. custompurified by prep HPLC (PHENOMENEX® Luna 5u 21.2×100 mm, gradient elution with Method 1—MeOH/water containing 0.1% trifluoroacetic acid as defined above, 0% B to 100% B over 12 min, 20 mL/min, 220 nM, product retention 13.0 min)