[NH2:1][C:2]1[S:3][C:4]2[CH:10]=[C:9]([Br:11])[CH:8]=[CH:7][C:5]=2[N:6]=1.C(N(CC)CC)C.[C:19](Cl)(=[O:21])[CH3:20].O>C1COCC1>[Br:11][C:9]1[CH:8]=[CH:7][C:5]2[N:6]=[C:2]([NH:1][C:19](=[O:21])[CH3:20])[S:3][C:4]=2[CH:10]=1To a solution of 2-amino-6-bromobenzothiazole (10 g, 43.65 mmol) and triethylamine (12.2 mL, 87.3 mmol) and N,N-dimethylaminopyridine (269 mg) in THF (100 mL) is added acetyl chloride (4.7 mL). After stirring for 17 hours water (100 mL) is added and the mixture is extracted twice with EtOAc (75 mL). The organic extracts are combined and dried over magnesium sulfate, filtered and concentrated to afford N-(6-bromo-benzothiazol-2-yl)-acetamide (8.79 g, 74%) as a solid.
Wird geladen…
