1,8-Diazabicyclo(5.4.0)undec-7-ene → HCID 50925182, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 2-bromo-1-(4-(5-(5-phenyl-4-propylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)phenyl)ethanol, Preparation 1C (30 mg, 0.066 mmol) and D-Azetidine-2-carboxylic acid (20.03 mg, 0.198 mmol) in DMSO (2 mL) was added DBU (0.030 mL, 0.198 mmol). The reaction mixture was heated at 80° C. for 2 hours. The reaction mixture was filtered and purified by HPLC. HPLC conditions: PHENOMENEX® Luna C18 5 micron column (250×30mm); 25-100% CH3CN/water (0.1% TFA); 25 minute gradient; 30 mL/min. Isolated fractions with correct mass were freeze-dried overnight to yield 16 mg of (2R)-1-(2-hydroxy-2-(4-(5-(5-phenyl-4-propylisoxazol-3-yl)-1,2,4-oxadiazol-3-yl)phenyl)ethyl) azetidine-2-carboxylic acid as a TFA salt. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.14 (2H, dd, J=8.57, 2.86 Hz), 7.82 (2H, dd, J=8.02, 1.65 Hz), 7.58-7.70 (5H, m), 5.16-5.29 (1H, m), 4.89-5.10 (1H, m), 3.84-4.05 (2H, m), 3.18-3.41 (2H, m), 2.96-3.03 (2H, m), 2.51-2.61 (1H, m), 1.63-1.76 (2H, m), 0.97 (3H, t, K=7.25 Hz). MS (m+1)=475. HPLC Peak RT=3.5 minutes (Analytical Method A). Purity=90%.

Provenance & Evidence