| abstract |
The present invention relates to dikyrants, in particular compounds having two macrocyclic chirant groups linked by crosslinking with ester or amide bonds, in particular compounds and salts of the general formula (V) below and metal chelates thereof.n n n n n n n n Wherein each X, which may be the same or different, is NZ, O or S and at least two X are NZ; each Z is an R 1 group or a CR 1 2 Y group, and at least one and preferably one on each macrocyclic phase Preferably 2 or 3 Z is CR 12 Y, each Y is CO 2 H, PO 3 H, SO 3 H, CONR 1 2 , CON (OR 1 ) R 1 , CNS or CONR1NR 1 2 , preferably COOH; m is 0 or 1 or 2, preferably 1; each n is 2 or 3, preferably 2; q is 1 or 2, preferably 1, and each R 1, which may be the same or different, is a hydrogen atom Or an alkyl group optionally substituted by one or more hydroxy and / or alkoxy groups, D is an unsubstituted having a molecular weight of 1000, preferably less than 100, which bonds two macrocyclic rings with at least one amide or ester bond It is a crosslinking group other than a carbonyl aminoethylaminocarbonyl group.) |