Cl[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][N:3]=1.[CH3:11][C:12]1[C:17]([CH3:18])=[CH:16][CH:15]=[CH:14][C:13]=1[OH:19].C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.CCOCC>[CH3:11][C:12]1[C:17]([CH3:18])=[CH:16][CH:15]=[CH:14][C:13]=1[O:19][C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][N:3]=1In a 20 mL microwave vial 2-chloro-5-nitropyridine (500 mg, 3.15 mmol), 2,3-dimethylphenol (385 mg, 3.15 mmol) and potassium carbonate (1308 mg, 9.46 mmol) were dissolved in N,N-Dimethylformamide (10 mL) to give a dark brown suspension. The reaction vessel was sealed and heated in Biotage Initiator at 110° C. for 1 h. After cooling the reaction was diluted with 25 mL of Et2O. The organic phase was washed with 3×25 mL of water, 10 mL of brine, dried over sodium sulphate, filtered and evaporated under vacuum to afford the title compound as a pale orange oil. (640 mg). 1H NMR (400 MHz, CDCl3): δ ppm 9.07 (1H, d), 8.50 (1H, dd), 7.24-7.19 (1H, m), 7.18-7.14 (1H, m), 7.04 (1H, d), 6.95 (1H, d), 2.38 (3H, s), 2.09 (3H, s); UPLC: 0.81 min, 245 [M+H]+.
読み込み中…
