Amide complexes

A compound of the formula ##STR11## wherein n is 0, 1 or 2,

• R.sup.1 and R.sup.2 independently are hydrogen, C.sub.1-8 -alkyl, phenyl, or benzyl, and, when n is 0, R.sup.1 and R.sup.2 jointly form trimethylene or tetramethylene,
• R.sup.3 is a cyclic aliphatic hydrocarbon group of up to 16 carbon atoms, C.sub.6-10 -aryl, C.sub.6-10 -ar-C.sub.1-6 -alkyl, C.sub.6-10 -aryl substituted by di-C.sub.1 -C.sub.6 -alkylamino or by C.sub.1 -C.sub.6 -alkoxy, or C.sub.6-10 -ar-C.sub.1-6 -alkyl substituted by di-C.sub.1 -C.sub.6 -alkylamino or by C.sub.1 -C.sub.6 -alkoxy,
• R.sup.4 is hydrogen,
• X is in each case hydrogen or a chelated metal ion equivalent,
• Y is COOX or ##STR12## or a physiologically acceptable salt thereof at one or more X groups which are H, in each case independently with an organic base, inorganic base, or amino acid.

A compound of the formula ##STR13## wherein n is 0, 1 or 2;

• R.sup.1 and R.sup.2 independently are hydrogen, C.sub.1-8 -alkyl, phenyl, or benzyl, and, when n is 0, R.sup.1 and R.sup.2 jointly form trimethylene or tetramethylene;
• R.sup.3 is a cyclic aliphatic hydrocarbon group of up to 16 carbon atoms, and, if at least one R.sup.4 is hydrogen, then R.sup.3 can also be C.sub.6-10 -aryl, C.sub.6-10 -ar-C.sub.1-6 -alkyl, C.sub.6-10 -aryl substituted by di-C.sub.1 -C.sub.6 -alkylamino or by C.sub.1 -C.sub.6 -alkoxy, or C.sub.6-10 -ar-C.sub.1-6 -alkyl substituted by di-C.sub.1 -C.sub.6 -alkylamino or by C.sub.1 -C.sub.6 -alkoxy;
• R.sup.4 is hydrogen or a saturated or unsaturated, straight-chain, branched-chain, or cyclic hydrocarbon residue of up to 16 carbon atoms;
• X is in each case hydrogen or a chelated metal ion equivalent;
• Y is COOX or ##STR14## or a physiologically acceptable salt thereof at one or more X groups which are H, in each case independently with an organic base, inorganic base, or amino acid.

A compound of the formula ##STR15## wherein n is 0;

• R.sup.1 and R.sup.2 together form trimethylene or tetramethylene;
• R.sup.3 is an aliphatic hydrocarbon group of up to 16 carbon atoms;
• R.sup.4 is an aliphatic hydrocarbon group of up to 16 carbon atoms;
• X is in each case hydrogen or a chelated metal ion equivalent;
• Y is COOX or ##STR16## or a physiologically acceptable salt thereof at one or more X groups which are H, in each case independently with an organic base, inorganic base, or amino acid.

A compound of the formula ##STR17## wherein n is 0, 1 or 2,

• R.sup.1 is C.sub.1-8 -alkyl, phenyl, benzyl or, when n is 0, R.sup.1 forms trimethylene or tetramethylene with R.sup.2 ;
• R.sup.2 is hydrogen, C.sub.1-8 -alkyl, phenyl, benzyl, or when n is 0, R.sup.2 forms trimethylene or tetramethylene with R.sup.1 ;
• R.sup.3 is a saturated, unsaturated, straight- or branched-chain or cyclic aliphatic hydrocarbon residue of up to 16 carbon atoms and, when R.sup.4 is a hydrogen atom, at least one R.sup.3 is a cycloalkyl group or an aryl or aralkyl group optionally substituted by one or several C.sub.1 -C.sub.6 -dialkylamino groups or by one or several C.sub.1 -C.sub.6 -alkoxy groups;
• R.sup.4 is a hydrogen atom, or a saturated, unsaturated, straight- or branched-chain or cyclic hydrocarbon residue of up to 16 carbon atoms;
• X is, in each case, hydrogen or a chelated metal ion equivalent;
• Y is COOX or ##STR18## or a physiologically acceptable salt thereof, at one or more X groups which are H, in each case independently, with an organic base, inorganic base, or amino acid.

A compound of the formula ##STR19## wherein n is 0, 1 or 2,

• R.sup.1 is hydrogen, C.sub.1-8 -alkyl, phenyl, benzyl, or when n is 0, R.sup.1 forms trimethylene or tetramethylene with R.sup.2 ;
• R.sup.2 is C.sub.1-8 -alkyl, phenyl, benzyl or, when n is 0, R.sup.2 forms trimethylene or tetramethylene with R.sup.1 ;
• R.sup.3 is a saturated, unsaturated, straight- or branched-chain or cyclic aliphatic hydrocarbon residue of up to 16 carbon atoms and, when R.sup.4 is a hydrogen atom, at least one R.sup.3 is a cycloalkyl group or an aryl or aralkyl group optionally substituted by one or several C.sub.1 -C.sub.6 -dialkylamino groups or by one or several C.sub.1 -C.sub.6 -alkoxy groups;
• R.sup.4 is a hydrogen atom, or a saturated, unsaturated, straight- or branched-chain or cyclic hydrocarbon residue of up to 16 carbon atoms;
• X is, in each case, hydrogen or a chelated metal ion equivalent;
• Y is COOX or ##STR20## or a physiologically acceptable salt thereof, at one or more X groups which are H, in each case independently, with an organic base, inorganic base, or amino acid.

A compound of the formula ##STR21## wherein n is 0, 1 or 2,

• R.sup.1 and R.sup.2 independently are hydrogen, C.sub.1-8 -alkyl, phenyl or benzyl, and, when n is 0, R.sup.1 and R.sup.2 jointly form trimethylene or tetramethylene;
• R.sup.3 and R.sup.4 together form oxazolidinyl;
• X is hydrogen, a chelated metal ion equivalent, or a combination thereof,
• Y is COOX or ##STR22## or a physiologically acceptable salt thereof, at one or more X groups which are H, in each case independently, with an organic base, inorganic base, or amino acid.