4-(Chloromethyl)benzoyl chloride → 4-chloromethyl-N-{4-methoxy-7-[(2-methoxy-ethyl)-methyl-amino]-benzothiazol-2-yl}-benzamide

Participants

Reaction Steps

To a stirred solution of 300 mg (1.12 mmol) 4-methoxy-N7-(2-methoxy-ethyl)-N7-methyl-benzothiazole-2,7-diamine and 1.12 ml (6.56 mmol) N-ethyldiisopropylamine in 10 ml THF at room temperature was added dropwise a solution of 257 mg (1.36 mmol) 4-(chloromethyl)-benzoyl chloride in 3 ml dichloromethane and stirring continued at room temperature for 16 h. The reaction mixture was then concentrated in vacuo. Flash chromatography (1/1 ethyl acetate/hexane) followed by trituration in ether and hexane afforded 200 mg (42%) 4-chloromethyl-N-{4-methoxy-7-[(2-methoxy-ethyl)-methyl-amino]-benzothiazol-2-yl}-benzamide as a light yellow crystalline solid. ES-MS m/e (%): 422 (M{37Cl}+H+, 32), 420 (M{35Cl}+H+, 100).

Provenance & Evidence