[N:1]1[C:2]([CH2:13][OH:14])=[CH:3][N:4]2[C:8]3[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=3[S:6][C:5]=12>C(Cl)Cl.O=[Mn]=O>[CH:13]([C:2]1[N:1]=[C:5]2[N:4]([CH:3]=1)[C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=1[S:6]2)=[O:14]To a stirred solution of imidazo[2,1-b]-benzthiazole-2-methanol (2.04 g, 10 mmol) in methylene chloride (200 ml), activated MnO2 (15 g, excess) was added. The reaction mixture was stirred at room temperature for 24 h and filtered through a pad of celite. The reaction mixture was concentrated and the product was purified by silica gel column chromatography by eluting it with 75% ethyl acetate; hexane. Brown solid; Yield: 800 mg, 40%; M+H 203.
Wird geladen…