Potassium Carbonate → Ethyl [2-[2-[(5-cyano-2-methoxybenzenesulfonyl)-(2-methyl-1,3-thiazol-4-ylmethyl)amino)ethyl]-5-isopropylphenoxy]acetate

Participants

Reaction Steps

A suspension of 300 mg of ethyl[2-[2-(5-cyano-2-methoxybenzenesulfonylamino)ethyl]-5-isopropylphenoxy]acetate, 132 mg of 4-chloromethyl-2-methyl-1,3-thiazole hydrochloride and 189 mg of potassium carbonate in 2.0 mL of N,N-dimethylformamide was stirred at room temperature for 18 hours, then at 50° C. for 3 hours. To the reaction mixture were added 60 mg of 4-chloromethyl-2-methyl-1,3-thiazole hydrochloride and 45 mg of potassium carbonate, and the mixture was stirred at the same temperature for 2.7 hours. To the reaction mixture were added 60 mg of 4-chloromethyl-2-methyl-1,3-thiazole hydrochloride and 45 mg of potassium carbonate, and the mixture was stirred at the same temperature for 3 hours. Furthermore, to the reaction mixture was added 2 mL of N,N-dimethylformamide, and the mixture was stirred at the same temperature for 1.5 hours. To the reaction mixture were added water and saturated aqueous sodium bicarbonate solution, and the mixture was extracted with ethyl acetate. The organic layer was washed with water, aqueous sodium chloride solution, and brine, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: ethyl acetate-hexane) to give 311 mg of ethyl [2-[2-[(5-cyano-2-methoxybenzenesulfonyl)-(2-methyl-1,3-thiazol-4-ylmethyl)amino]ethyl]-5-isopropylphenoxy]acetate.

Provenance & Evidence