2-Aminothiazole → HCID 54765573, compound

Participants

Reaction Steps

A solution of (S)-2-(5-chloro-3-oxo-3,9-dihydro-1H-chromeno[2,3-c]pyrrol-2-yl)-3-cyclohexyl-propionic acid (100 mg, 0.27 mmol) (Example 20, Step 2c), commercially available 2-aminothiazole (32 mg, 0.32 mmol), N-ethyl-N-dimethyaminopropyl carbodiimide hydrochloride (EDCI. HCl) (40 mg, 0.29 mmol), and N-hydroxybenzotriazole (HOBt) (56 mg, 0.29 mmol) in methylene chloride (5 mL) was stirred for 16 hours at 25° C. The reaction mixture was diluted with water and extracted with ethyl acetate (3×). The combined organic layers were dried over anhydrous sodium sulfate and concentrated in vacuo. The resulting residue, upon silica gel flash chromatography using hexane-ethyl acetate gradiant elution, afforded (S)-2-(5-chloro-3-oxo-3,9-dihydro-1H-chromeno[2,3-c]pyrrol-2-yl)-3-cyclohexyl-N-thiazol-2-yl-propionamide (104 mg, 85.2%), as a white solid. 1H NMR (DMSO-d6) δ: 12.55 (s, 1H), 7.50 (d, J=2.9 Hz, 1H), 7.40 (d, J=7.8 Hz, 1H), 7.20-7.28 (m, 2H), 7.07-7.17 (m, 1H), 5.07 (dd, J=10.5, 4.2 Hz, 1H), 4.39 (d, J=19.1 Hz, 1H), 4.08 (d, J=18.6 Hz, 1H), 3.84 (br. s., 2H), 1.52-1.90 (m, 7H), 0.76-1.29 (m, 6H).

Provenance & Evidence