反应详情

(R/S)-2-Hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetic acid (Int-V, 30 mg, 0.070 mmol) was dissolved in DMF (1 mL) prior to the addition of 4-methylmorpholine (0.076 mL, 0.696 mmol), ammonia (0.5M in dioxane, 0.278 mL, 0.139 mmol), and HATU (39.7 mg, 0.104 mmol). This was stirred overnight and was then purified by preparative HPLC (PHENOMENEX® Luna 5u C18 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 10 min, 20 mL/min, 220 nM, product retention time=11.4 min) to give (R/S)-2-hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamide (10 mg, 0.021 mmol, 30.4% yield): LCMS=431.1 [M+H]+; 1H NMR (400 MHz, methanol-d4) δ ppm 8.18 (2 H, d, J=8.36 Hz), 7.65-7.80 (4 H, m), 7.52-7.65 (3 H, m), 5.11 (1 H, s). HPLC Peak RT=7.9 min (Analytical Method C).

1. customwas then purified by preparative HPLC (PHENOMENEX® Luna 5u
2. washC18 21.2×100 mm, gradient elution with Method 1—MeOH/water containing 0.1% trifluoroacetic acid
3. customover 10 min