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Stereoselectivity in reactions of metal complexes. V. Synthesis of mixed-ligand cobalt(III) complexes with (S)-aspartic-N-monoacetic acid and different amino-acids

✍ Scribed by Gérard Colomb; Klaus Bernauer

Publisher
John Wiley and Sons
Year
1977
Tongue
German
Weight
370 KB
Volume
60
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The synthesis of mixed‐ligand cobalt(III) complexes with (S)‐aspartic‐N‐monoacetic acid ((S)‐AMA) and different amino‐acids Na[Co((S)‐AMA)(AA)] (AA = gly, (R)‐ and (S)‐ala, val, phe, ser and leu) leads to a mixture of cis‐N‐ and trans‐N‐isomers. These isomers are formed stereospecifically. VIS., CD.‐ and NMR.‐spectra are reported and a proposal is given for the absolute configuration of all the compounds isolated.

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Stereoselectivity in reactions of metal
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✍ Robert Deschenaux; Klaus Bernauer 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 German ⚖ 262 KB 👁 1 views

## Abstract Optically active alanine, valine and leucine were obtained by a transamination reaction between pyridoxamine and the corresponding α‐keto acid in the presence of a Cu^2+^‐complex with the tridentate ligand 2,6‐bis[(3__S__)‐3‐phenykl‐2‐azabutyl]pyridine. In each case the amino acid with

Stereoselectivity in reactions of metal
Stereoselectivity in reactions of metal complexes. VI. Kinetic study of the interconversion of cis-N and trans-N (S)-aspartato-N-acetato(amino-acidato)cobalt(III) complexes
✍ Gérard Colomb; Klaus Bernauer 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 German ⚖ 217 KB

## Abstract The __cis__‐N/__trans__‐N interconversion of the title compound containing glycine and (__R__)‐ or (__S__)‐leucine has been studied by polarimetric and spectrophotometric techniques. Equilibrium constants were determined on the basis of kinetic and thermodynamic data. It is shown that t