Cyclic acetals or ketals of 8-keto esters or amides

Claim 1

A compound of formula I ##STR16## wherein R 1 and R 2 are each independently of the other hydrogen, C 1 -C 8 alkyl, phenyl, naphthyl, C 5 -C 7 cycloalkyl, C 7 -C 14 aralkyl or C 7 -C 14 alkaryl, which organic radicals are substituted by zero to three members selected from the group consisting of halogen, hydroxy, alkoxy, nitro, cyano and amino, R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are each independently hydrogen or C 1 -C 4 alkyl, X is --O--or --NR 9 --, where R 9 is hydrogen or C 1 -C 4 alkyl, n is 0 or 1, m is 2, 3 or 4, and Q is an aliphatic, cycloaliphatic, aromatic, araliphatic or 5- or 6-membered heterocyclic radical of valency m, with the proviso that where several ester or amide radicals are present in the molecule, the groups R 1 to R 9 within the scope of the above definitions are the same or different different and, where n is 0, both carbon atoms are linked direct to each other to form a 5-membered heterocyclic radical.