| 摘要 |
1,149,278. N-Aryl-N<SP>1</SP>,N<SP>1</SP>-dialkyl-ureas. RUMANIA, MINISTRY OF INDUSTRIAL CHEMICALS. 22 July, 1966 [26 July, 1965], No. 33140/66. Heading C2C. N - aryl - N<SP>1</SP>,N<SP>1</SP> - dialkyl - ureas are prepared by reacting a solution of an aryl isocyanate in an aromatic solvent with an aqueous solution of a water-soluble dialkylamine in the presence of a surfactant. The aryl group may be phenyl or p-chlorophenyl, and a surfactant based on sodium butylnaphthalene sulphonate may be used. |
