Hydrochloric Acid → 1-(4-Methanesulfonylaminophenyl)-3-azabicyclo[3.1.0]hexane-2,4dione

Participants

Reaction Steps

A solution of 1.2 ml of methanesulfonyl chloride in 10 ml of methylene chloride is stirred dropwise at room temperature into a mixture of 3 g of 1-(4-aminophenyl)-3-azabicyclo[3.1.0]hexane-2,4-dione, 90 mg of dimethylaminopyridine and 37 ml of pyridine. After it has been stirred for 16 hours, the reaction mixture is freed from solvent in vacuo. The residue is dissolved in 100 ml of water and the solution is adjusted to pH 1 with hydrochloric acid. After further stirring, the crystals are isolated by filtration and recrystallised from methanol. The title compound is obtained in the form of whitish orange crystals with a melting point of 208°-209° C. and with Rf=0.32 on thin-layer silica gel plates in the system methylene chloride/methanol (10:1).

Provenance & Evidence