| 摘要 |
1. Ureas, with cyclic substituents, of the following general formula I see diagramm : EP0028829,P26,F1 in which A = see diagramm : EP0028829,P26,F2 including the positional isomers, in particular the transform with Rx denoting OH or carboxyl ; Ry denoting H or acyl ; R denoting hydrogen, hydroxyl, alkyloxy or acyl, a C1 -C12 -alkyl radical, optionally with hydroxyl groups, which can be straight-chain or branched and interrupted by oxygen and/or nitrogen atoms, a C3 -C13 -cycloalkyl radical, optionally with alkyl substituents, which can be interrupted by oxygen and/or nitrogen atoms, and/or with hydroxyl groups and/or with an aliphatic or aromatic acyl group and/or with carboxyl or carboalkoxy groups, a C2 -C5 -alkenyl or alkenyl radical, or a phenyl radical which can be substituted by alkyl and/or acyl and/or hydroxyl and/or dialkylamino groups ; R**1 denotes hydrogen or a straight-chain or branched C1 -C4 -alkyl radical or alkoxy radical ; R**2 denotes hydrogen or a straight-chain or branched C1 -C4 -alkyl radical, optionally with hydroxyl groups, or C1 -C4 -acyl radical and gamma denotes a number from 0 to 1. |
