2-Aminothiazole → HCID 54765734, compound

Participants

Reaction Steps

A solution of (S)-2-(5-chloro-3-oxo-3,9-dihydro-1H-chromeno[2,3-c]pyrrol-2-yl)-4-methyl-pentanoic acid (130 mg, 0.35 mmol) (Example 22, Step 1c), commercially available 2-aminothiazole (47 mg, 0.36 mmol), N-ethyl-N-dimethyaminopropyl carbodiimide hydrochloride (EDCI. HCl) (82 mg, 0.43 mmol), and N-hydroxybenzotriazole (HOBt) (57 mg, 0.43 mmol) in methylene chloride (15 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 gradient elution, afforded (S)-2-(5-chloro-3-oxo-3,9-dihydro-1H-chromeno[2,3-c]pyrrol-2-yl)-4-methyl-pentanoic acid thiazol-2-ylamide (145 mg, 58.2%), as a white solid. 1H NMR (DMSO-d6) δ: 12.57 (s, 1H), 7.50 (d, J=3.4 Hz, 1H), 7.40 (d, J=7.8 Hz, 1H), 7.20-7.29 (m, 2H), 7.08-7.16 (m, 1H), 5.05 (dd, J=10.8, 4.4 Hz, 1H), 4.39 (d, J=19.1 Hz, 1H), 4.09 (d, J=19.1 Hz, 1H), 3.75-3.91 (m, 2H), 1.80-1.93 (m, 1H), 1.62-1.75 (m, 1H), 1.46 (br. s., 1H), 0.94 (t, J=6.6 Hz, 6H).

Provenance & Evidence