Fourteen to eighteen membered tetraazamacrocyclic ligands N(4)TTD(1)-N(4)TTD(4) have been synthesized by the condensation of aliphatic diamines. H(2)N-(CH(2))(y)-NH(2) (y = 2 or 3) and dicarboxylic acids, HOOC-(CH(2))(x)-COOH (x = 1 or 2) in the presence of condensing reagents dicyclohexylcarbodiimide (DCHC) and 4-dimethylaminopyridine (DMAP). On reduction these macrocyclic ligands give N(4)TTD...

P. Souza3 *, A. I. Matesanz3, A. Arquerob, V. Fernandez3 a Departamento de Qmmica (C -V III), Facultad de Ciencias, Universidad Autönoma de Madrid, Cantoblanco, E-28049-Madrid, Spain b Departamento A.T.S.I., Facultad de Informätica, Universidad Politecnica de Madrid, Montegancedo s/n, E-28660-Boadilla del Monte, Madrid, Spain Z. Naturforsch. 49b, 665-671 (1994); received January 19, 1994 Triazo...

A screening-level aquatic environmental risk assessment for macrocyclic fragrance materials using a "group approach" is presented using data for 30 macrocyclic fragrance ingredients. In this group approach, conservative estimates of environmental exposure and ecotoxicological effects thresholds for compounds within two subgroups (15 macrocyclic ketones and 15 macrocyclic lactones/lactides) were...

A new 4D-QSAR approach has been considered. For all investigated molecules the 3D structural models have been created and the set of conformers (fourth dimension) have been used. Each conformer is represented as a system of different simplexes (tetratomic fragments of fixed structure, chirality and symmetry). The investigation of influence of molecular structure of macrocyclic pyridinophanes, t...

The reaction of 2,6-diformyl-4-methylphenyl disulfide with [Ni(tn)3]Cl2 (tn = 1,3-diaminopropane), in methanol and the presence NaBPh4 resulted isolation [Ni2(L1)](DMF)2(BPh4)2 (I), (L1 15,95-dimethyl-3,7,11,15-tetraaza-1,9(1,3)-dibenzenacyclohexadecaphane-2,7,10,15-tetraene-12,92-bis(thiolate). This represents a 2-electron solvent assisted reduction bond to form two thiolate ligands where is c...

Genetically encoded macrocyclic peptide libraries with unnatural pharmacophores are valuable sources for the discovery of ligands many targets interest. Traditionally, generation such employs “early stage” incorporation building blocks into chemically or translationally produced macrocycles. Here, we describe a divergent late-stage approach to starting from readily available material: genetical...