Process for simultaneously preparing 1,3-substituted ureas and 1,2-diols

Verfahren zur gleichzeitigen Herstellung von 1,3-disubstituierten Harnstoffen und 1,2-Diolen durch Umsetzung von cyclischen Carbonaten mit Aminen in bestimmtem Mengeverhältnis bei höherer Temperatur. Die nach dem erfindungsgemäßen Verfahren herstellbaren Harnstoffe I sind wertvolle Ausgangsmaterialien zur Synthese von Farbstoffen und Pflanzenschutzmitteln. 1. A process for the simultaneous preparation of 1,3-disubstituted ureas of the formula see diagramm : EP0002526,P8,F1 where R**1 is alkyl of 1 to 20 carbon atoms, which may be substituted by phenoxy groups and/or alkoxy groups of 1 to 13 carbon atoms, monocycloalkyl of 3 to 8 carbon atoms, bicycloalkyl of 6 to 12 carbon atoms or aralkyl of 7 to 20 carbon atoms, and 1,2-diols of the formula see diagramm : EP0002526,P8,F2 where the individual radicals R**2 and R**3 are indentical or different and each is hydrogen or an aliphatic radical, and the two radicals R**3 together with the two adjacent carbon atoms can also be members of a ring, characterized in that cyclic, aliphatic carbonates of the formula see diagramm : EP0002526,P9,F3 where R**2 and R**3 have above meanings, are reacted with amines of the formula R**1-NH2 where R**1 has the above meaning, in a ratio of from 2 to 20 moles of starting material IV per mole of starting material III at a temperature above 100 degrees C.