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Stereoselectivity in Reactions of Metal Complexes IV. Asymmetric Synthesis of (2R, 7S, 10R)- and (2R, 7R, 10R)-2, 10-diamino-5, 5, 7-trimethyl-4, 8-diazaundecanenickel (II) by Stereoselective Hydrogenation of (2R, 10R)-2, 10-diamino-5, 5, 7-trimethyl-4, 8-diaza-7-undecenenickel(II)

✍ Scribed by Bruno Güntert; Saturnin Claude; Klaus Bernauer

Publisher
John Wiley and Sons
Year
1975
Tongue
German
Weight
852 KB
Volume
58
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The catalytic hydrogenation of (2__R__, 10__R__)‐2, 10‐diamino‐5, 5, 7‐trimethyl‐4, 8‐diaza‐7‐undecenenickel(II) yields two products when the reaction is performed in the presence of ethylenediamine, but only one, when ethylenediamine is absent. The stereochemistry of the reaction is discussed and a proposal for the absolute configuration of the two diastereomeric complexes and the free ligands is given on the base of CD.‐ and NMR.‐spectra.

📜 SIMILAR VOLUMES

The Crystal Structure of (2 R, 7 S, 10 R
The Crystal Structure of (2 R, 7 S, 10 R)-2,10-diamino-5,5,7-trimethyl-4,8-diazaundecanenickel (II) perchlorate
✍ Helen Stoeckli-Evans 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 German ⚖ 327 KB

## Abstract The structure of the title compound, a tricyclic Ni(II) tetra‐amine complex has been determined from analysis of photographic X‐ray data. The crystal system is orthorhombic, space group __P__2~1~2~1~2~1~, with unit cell dimensions __a__ = 9.802, __b__ = 8.998, __c__ = 24.378 Å. The Ni a