Hydrochloric Acid → HCID 22119859, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of sodium hydride (60% in oil, 0.293 g, 7.33 mmol) in tetrahydrofuran is cooled to 0° C., treated dropwise with a solution of tert-butyl acetoacetate (1.00 mL, 6.03 mmol) in tetrahydrofuran, and stirred for several minutes. The resultant mixture is added dropwise to a solution of 3-[3-(bromomethyl)-1,2-benzisothiazol-5-yl]-1-methyl-6-(trifluoromethyl)-2,4(1H,3H)-pyrimidinedione (1.40 g, 3.33 mmol) in methyl sulfoxide. After the addition is complete, the reaction mixture is poured into an ice-water mixture containing a trace of 10% hydrochloric acid. The resultant aqueous mixture is extracted with methylene chloride. the organic extracts are combined, dried over anhydrous magnesium sulfate, and concentrated in vacuo to obtain an oil. Column chromatography of the oil using silica gel and 0%, 2%, 3%, and 15% diethyl ether in methylene chloride solutions gives the title product as a solid, mp 76-78° C.

Provenance & Evidence