Potassium Fluoride → N-[4-methyl-5-(3-thienyl)-1,3-thiazol-2-yl]acetamide

Participants

Reaction Conditions

Reaction Steps

In a microwave tube, N-(5-iodo-4-methyl-1,3-thiazol-2-yl)acetamide, Intermediate 1 (564.2 mg; 2 mmol; 1 eq.) and Pd(dppf)Cl2 (73.2 mg; 0.10 mmol; 0.05 eq.) are suspended in Toluene (7 ml). A solution of potassium fluoride (464.8 mg; 8 mmol; 4 eq.) in MeOH (7 ml) is added. 3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene (630.3 mg; 3 mmol; 1.50 eq.) is finally added as a solid. The resulting solution is flushed with argon, the tube is closed and heated under microwave action at 120° C. for 15 minutes. The reaction mixture is filtered over Celite and the solvents are evaporated. The resulting crude product is dissolved in EtOAc, washed with water and brine and dried over MgSO4. It is then purified by preparative HPLC, affording Compound (19) as white-off solid (316.7 mg; 66% yield). 1H NMR (DMSO-d6) δ 2.12 (s, 3H), 2.35 (s, 3H), 7.28 (dd, J=1.5, 4.9 Hz, 1H), 7.58 (dd, J=1.5, 3.0 Hz, 1H), 7.67 (dd, J=3.0, 4.9 Hz, 1H), 12.09 (s, 1H). M−(ESI): 237.03; M+(ESI): 239.03. HPLC, Rt: 2.92 min (purity: 99.6%).

Provenance & Evidence