Hydroxybenzylmalonic acid derivatives

Claim 1

A compound of the formula I, ##STR14## wherein X can be oxygen or --NH--, R 1 represents a hydroxybenzyl group of the formula II ##STR15## wherein R 3 and R 4 each independently represent an alkyl group having 1-9 C-atoms, aralkyl having 7-9 C-atoms or cycloalkyl having 5-8 C-atoms, and R 5 represents hydrogen or methyl, R 2 represents, in the case where X is oxygen, hydrogen or a hydroxybenzyl group of the formula II, in the case however where X is --NH--only hydrogen, Y represents hydrogen, alkyl having 1-17 C-atoms, alkenyl having 2-3 C-atoms, cyclohexyl, phenyl, benzyl, a phenyl or phenylethyl group substituted by 2 alkyl groups each having 1-4 C-atoms and a hydroxyl group, alkylamino having 1-12 C-atoms, dialkylamino having 2-16 C-atoms, anilino, alkoxy having 1-12 C-atoms, benzyloxy or phenoxy, R a represents methyl, R b represents alkyl having 1-6 C-atoms, R c represents alkyl having 1-9 C-atoms, phenyl, benzyl or phenylethyl, R d represents alkyl having 1-6 C-atoms, or R c and R d together with the C-atom to which they are bound form a cyclopentane or cyclohexane ring, and R e represents hydrogen or alkyl having 1-5 C-atoms, with the number of the C-atoms of R e being less by 1 than that of R b .