Reaktion #164399

Reaktionsgleichung

(R/S)-3-(2-Hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamido)propanoic acid

4-methylmorpholine

HATU

→

(R/S)-2-hydroxy-N-(3-(3-methoxyazetidin-1-yl)-3-oxopropyl)-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamide

Ausbeute 50.0%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigewas purified via preparative LC/MS with the following conditions
2. 2
   workup.WAITGradient: 35-100% B over 25 minutes
3. 3
   Sonstigea 5-minute hold
4. 4
   workup.ADDITIONFractions containing the desired product
5. 5
   Sonstigedried via centrifugal evaporation

Vorschrift

(R/S)-3-(2-Hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamido)propanoic acid (Int-V, 25 mg, 0.050 mmol), 3-methoxyazetidine, HCl (6.15 mg, 0.050 mmol), 4-methylmorpholine (20.13 mg, 0.199 mmol), and HATU (24.60 mg, 0.065 mmol) were added to DMF (3 mL). This was stirred for 1 h before it was purified via preparative LC/MS 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: 35-100% 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-(3-(3-methoxyazetidin-1-yl)-3-oxopropyl)-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamide (14.1 mg, 0.025 mmol, 49.6% yield): LCMS=572.2 [M+H]+; 1H NMR (400 MHz, methanol-d4) δ ppm 8.19 (2 H, dd, J=8.41, 1.88 Hz), 7.54-7.77 (7 H, m), 5.11 (1 H, d, J=2.01 Hz), 4.06-4.31 (3 H, m), 3.84-3.98 (1 H, m), 3.69-3.83 (1 H, m), 3.43-3.56 (2 H, m), 3.26 (3 H, d, J=2.76 Hz), 2.29-2.44 (2 H, m); HPLC peak RT=2.4 min (Method E).

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