Cl.[CH3:2][S:3]([C:6]1[CH:12]=[CH:11][C:9]([NH2:10])=[CH:8][CH:7]=1)(=[O:5])=[O:4].C[Al](C)C.[C:17]([C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][N:20]=1)#[N:18]>C1(C)C=CC=CC=1.C(Cl)(Cl)Cl>[CH3:2][S:3]([C:6]1[CH:12]=[CH:11][C:9]([NH:10][C:17]([C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][N:20]=2)=[NH:18])=[CH:8][CH:7]=1)(=[O:4])=[O:5]To a suspension of 4-(methylsulfonyl)aniline hydrochloride (6 g, 28.8 mmol) in toluene (150 ml) at 0° C., trimethylaluminum (2M solution in toluene, 21.6 ml, 43.2 mmol) was added over 15 minutes. The reaction mixture was warmed to room temperature and stirred for 2.5 hours. A solution of 2-cyanopyridine (6 g, 57.6 mmol) in toluene (150 ml) was added over 10 minutes and the reaction mixture was heated to 85°-90° C. After 24 hours, the reaction mixture was cooled to room temperature and poured over a slurry of silica gel in chloroform. After filtration, the residue was washed with a mixture of methylene chloride/methanol and later methanol. The combined filtrates were concentrated and the resulting yellowish solid was stirred with ethyl acetate (1500 ml) and filtered. The pale yellow solid (5.2 g, 66%) was used in the next reaction without further purification.
読み込み中…
