Piperidin-4-ol → N-(5-[5-[(4-hydroxypiperidin-1-yl)sulfonyl]-2-thienyl]-4-methyl-1,3-thiazol-2-yl)acetamide

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Reaction Steps

5-[2-(acetylamino)-4-methyl-1,3-thiazol-5-yl]thiophene-2-sulfonyl chloride, prepared as in Step 1 of Example 9 (110 mg; 0.33 mmol; 1 eq.), is dissolved in DCM (10 ml). 4-Hydroxypiperidine (66.1 mg; 0.65 mmol; 2 eq.) and DIEA (0.17 ml; 0.98 mmol; 3 eq.) are added. After one hour, the solvents are evaporated. The crude product is dissolved in DCM and washed with NH4Cl saturated solution, water and dried over MgSO4. After evaporation of the solvents, Compound (10) is obtained as white-off solid (33 mg; 23%). 1H NMR (DMSO-d6) δ 1.40-1.60 (m, 2H), 1.72-1.85 (m, 2H), 2.14 (s, 3H), 2.42 (s, 3H), 2.80-2.92 (m, 2H), 3.15-3.30 (m, 2H), 3.59 (m, 1H), 4.71 (d, J=3 Hz, 1H), 7.30 (d, J=4.5 Hz, 1H), 7.58 (d, J=4.5 Hz, 1H), 12.18 (br s, 1H). M−(ESI): 400.20; M+(ESI): 402.10. HPLC, Rt: 2.86 min (purity: 100%).

Provenance & Evidence