Process for the preparation of sulfonyl ureas

Details Process for the preparation of sulfonyl ureas Process for the preparation of sulfonyl ureas

C - Chemistry, Metallurgy

07

C

260/541.3

C07C 311/54 (2006.01)

Patent

CA 1051026

ABSTRACT OF THE DISCLOSURE An arylene-bis-sulfonyl urea of the formula: [R'-SO2-N-CO-NH-Ar-NH-CO-N-SO2-R']2- 2 Me+ wherein Ar is arylene, R' is amino, an aliphatic residue having 1 to 20 carbon atoms, a cycloaliphatic residue having 4 to 10 carbon atoms, an aromatic residue, an alkyl-aromatic residue, or a heterocyclic residue, and Me+ is a sodium or potassium ion, is prepared by reacting a dicarboxylic acid-N,N'-dichloramide of the formula: CL-NH-CO-Ar-CO-NH-Cl with a sulfonic acid amide of the formula: R'-SO2-NH2 in a mixture of dimethylformamide and water, in the presence of excess al- kali hydroxide, and at a temperature between 10° and 50°.

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