Potassium Carbonate → (4-Chloro-2-pyridin-3-yl-thiazol-5-yl)-methylamine
反応式
[Cl:1][C:2]1[N:3]=[C:4]([C:15]2[CH:16]=[N:17][CH:18]=[CH:19][CH:20]=2)[S:5][C:6]=1[N:7](C)[C:8](=O)C(F)(F)F.C(=O)([O-])[O-].[K+].[K+]>>[Cl:1][C:2]1[N:3]=[C:4]([C:15]2[CH:16]=[N:17][CH:18]=[CH:19][CH:20]=2)[S:5][C:6]=1[NH:7][CH3:8]参加物
3
実験手順
A solution of N-(4-chloro-2-pyridin-3-yl-thiazol-5-yl)-2,2,2-trifluoro-N-methyl-acetamide (0.337 g, 1 mmol) in ice-cold methanol (18 mL) was treated with potassium carbonate (0.434 g, 3.1 mmol) and stirred under nitrogen for 20 min. The solids were removed by filtration, and the filtrate was concentrated under reduced pressure and it was adsorbed onto silica gel. Purification by silica gel chromatography eluting with a gradient of ethyl acetate in hexanes afforded a bright yellow solid (0.195 g, 82%): mp 79° C. (dec); 1H NMR (400 MHz, CDCl3) δ 8.97 (d, J=2.1 Hz, 1H), 8.55 (dd, J=4.8, J=1.5 Hz, 1H), 8.08 (ddd, J=8.1, 2.0, 2.0 Hz, 1H), 7.32 (dd, J=8.1, 4.8 Hz, 1H), 4.07 (br m, 1H), 3.03 (d, J=5.3 Hz, 3H); ESIMS m/z 228.23 (M+2); IR 1540 cm−1.