2004 Urea derivatives

Urea derivativesQ 0640 A New Simplified Method for the Preparation of N,N' — N,N'-Diphenylurea (II)

is prepared in a simple, rapid procedure affording high yields of a very pure product. Evidently, the glassware, the solvents or the nitrogen contain sufficient water to allow for the conversion to the urea, or an intermediate is converted to the urea during aqueous work-up. — (TRAN, K.; BERLIN*, D.; Org. Prep. Proced. Int. 36 (2004) 1, 71-73; Dep. Chem., Okla. State Univ., Stillwater, OK 74078, USA; Eng.) — R. Langenstrassen

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