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2 results on '"Preut, Hans"'

1. Platinum(II) coordination to N1 and N7,N1 of guanine: cis-DDP model cross-links in the interior and simultaneous cross-links at the periphery and the interior of DNA

Author

Frommer, Gudrun, Mutikainen, Ilpo, Pesch, Ferdinand J., Hillgeris, Edda C., Preut, Hans, and Lippert, Bernhard

Subjects
Coordination compounds -- Research, Chemistry
Abstract

A series of compounds containing p-methylguanine ligands platinated exclusively at N1 or simultaneously at N1 and N7 were prepared and characterized. The starting material for all the complexes was (dien Pt 9-MeGH-N super 7)2+ reacted with a Pt electrophile. It was found that reactions at N7 are completed within minutes as soon as the N1 position is platinated in complexes containing the N1-bound Pt(II). The Pt in (en)Pt(9-MeG-N super 1)2.3H2O has a square-planar coordination geometry and cis-(NH3 2 Pt 1-MeU 9-MeGH-N super 1)1+ reveals a tautomeric structure.

Published
1992

2. Regioselective de novo synthesis of cyanohydroxypyridines with a concerted cycloaddition mechanism

Author

Jin-Yong Lu, Keith, John A., Wei-Zheng Shen, Schurmann, Markus, Preut, Hans, Jacob, Timo, and Arndt, Hans-Dieter

Subjects
Olefins -- Chemical properties, Ring formation (Chemistry) -- Analysis, Nuclear magnetic resonance -- Evaluation, Pyridine -- Chemical properties, Chemistry
Abstract

The scope of 1-azadiene cycloaddition is demonstrated by the synthesis [alpha],[alpha]-dicyanoalkenes to obtain highly functionalized 3-hydroxy-pyridines. The findings from the reaction could be applied to explore the 3-hydroxypyridines in materials, synthesis, and medicinal chemistry.

Published
2008

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