Butyric Acid → HCID 57489439, compound

Participants

Reaction Steps

To a solution of butyric acid (50 mg) in DMF (5 mL) was added HATU (200 mg) then triethyl amine (150 μL). The resulting solution was stirred at ambient temperature for 15 minutes then 5-(3,5-dichloro-4-fluorophenyl)-3-(4-(3-fluoroazetidin-3-yl)phenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazole hydrochloride (Preparation 16 100 mg) was added in one portion. Reaction stirred at ambient temperature for 16 hours. Solvent was removed in vacuo and the residue partitioned between water (10 mL) and CH2Cl2 (10 mL). Organic phase collected and condensed. The crude material was adsorbed on silica and chromatographed on a 12 g silica column, eluting with a gradient of 0% to 100% ethyl acetate in heptane. Fractions containing the desired material were combined and concentrated. Et2O (˜½ mL) was added to the resulting film. Placing the flask on high vacuum overnight resulted in formation of a white foam. Yield 86 mg (80%). 1H NMR (CDCl3) δ 7.75 (d, 2H), 7.61 (d, 2H), 7.55 (d, 2H), 4.68-4.33 (m, 4H), 4.12 (d, 1H), 3.72 (d, 1H), 2.19 (m, 2H), 1.73 (m, 2H), 1.01 (m, 3H). LC/MS retention time=3.688 minutes, MS calculated for (C23H19Cl2F5N2O2), 520.07; found 521.0 M+H.

Provenance & Evidence