Diazomethane → N-(1,2,3-Thiadiazol-5-yl)benzamide

Participants

Reaction Steps

To a stirred solution of benzoylisothiocyanate (50.6 g., 310 mmoles) in commercial anhydrous ether (400 ml.), maintained at 0° and in a nitrogen atmosphere, was added dropwise with vigorous stirring, 0.685 N ethereal diazomethane (453 ml., 310 mmoles). When the addition was completed, the mixture was stirred for 1 hour at 0°, the solid was collected by filtration and dried in vacuo. The melting point of the crude material (23.3 g.) thus obtained was observed somewhere in the region 232° to 257°. Goerdler reported M.p. 267° for the pure material. A small second crop (2.1 g.) was obtained by evaporation of the mother liquor in vacuo. The total yield was therefore 40%.

Provenance & Evidence