Ammonia → 2-(4,5-Dihydro-4-methyl-5-oxo-1,3,4-oxadiazol-2-yl)benzenesulfonamide

Participants

Reaction Steps

To a suspension of 3.3 g of the product of Example 3 in 50 ml of tetrahydrofuran was added dropwise 3 ml of condensed ammonia while keeping the reaction temperature at -5° C. with external cooling. After stirring at 0° for 1.5 hours, the solvent was evaporated in vacuo and water was added to the residue to yield a precipitate. After filtration the isolated residue was washed with water, then dissolved in tetrahydrofuran and dried over MgSO4. After evaporation of the solvent in vacuo, 2.9 g of the subject compound was obtained as a crude solid; m.p. 168°-173° C.

Provenance & Evidence