[Br:1]NC(=O)CCC(N)=O.[CH3:10][C:11]1[C:19]2[C:14](=[N:15][CH:16]=[CH:17][CH:18]=2)[S:13][N:12]=1.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>C(Cl)(Cl)(Cl)Cl>[Br:1][CH2:10][C:11]1[C:19]2[C:14](=[N:15][CH:16]=[CH:17][CH:18]=2)[S:13][N:12]=1N-Bromosuccinamide (10.7 mmol) was added to a solution of 3-methylisothiazolo[5,4-b]pyridine (10.0 mmol) in carbontetrachloride (20 mL). Benzoyl peroxide (0.82 mmol) was added and the reaction mixture was heated at reflux for 48 h. The reaction mixture was filtered through Celite (ethyl acetate) and the eluent was concentrated to provide crude 3-(bromomethyl)isothiazolo[5,4-b]pyridine as a yellow solid.
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