4-Methylmorpholine → (R/S)-2-hydroxy-N-(2-(2-oxoimidazolidin-1-yl)ethyl)-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamide

関与物質

反応手順

(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, 25 mg, 0.058 mmol), 1-(2-aminoethyl)imidazolidin-2-one (22.46 mg, 0.087 mmol), 4-methylmorpholine (23.45 mg, 0.232 mmol), and HATU (28.7 mg, 0.075 mmol) were added to DMF (1 mL). This was stirred for 1 h before it was purified via preparative LCMS with the following conditions: Column: Waters XBridge C18, 19×250 mm, 5-μm particles; Guard Column: Waters XBridge C18, 19×10 mm, 5-μm particles; Mobile Phase A: 5:95 methanol:water with 10-mM ammonium acetate; Mobile Phase B: 95:5 methanol:water with 10-mM ammonium acetate; Gradient: 45-100% B over 25 minutes, then a 5-minute hold at 100% B; Flow: 20 mL/min. Fractions containing the desired product were combined and dried via centrifugal evaporation to give (R/S)-2-hydroxy-N-(2-(2-oxoimidazolidin-1-yl)ethyl)-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamide (13.2 mg, 0.024 mmol, 42.0% yield): LCMS=543.1 [M+H]+; 1H NMR (400 MHz, methanol-d4) δ ppm 8.11-8.23 (2 H, m), 7.54-7.73 (7 H, m), 5.11 (1 H, s), 3.32-3.49 (6 H, m), 3.21-3.29 (2 H, m); HPLC peak RT=2.4 min (Method E).

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