Process for the preparation of cyclic ureas

Details Process for the preparation of cyclic ureas Process for the preparation of cyclic ureas

1989-08-15

1991-01-22

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D48700

Patent

active

049872346

ABSTRACT:
A process for the preparation of cyclic urea derivatives of the formula ##STR1## in which R.sup.1 and R.sup.2 are equal or different and represent hydrogen, alkyl having from 1 to 6 carbon atoms or alkoxy having from 1 to 3 carbon atoms, which comprises reacting a 1,2-diaminobenzene of the formula ##STR2## in which R.sup.1 and R.sup.2 have the meaning indicated above are reacted with carbon dioxide in the presence of water under superatmospheric pressure at a temperature of at least 120.degree. C.

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