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Rapid Phosphodiester Hydrolysis Catalyzed by Lanthanum(III)

✍ Scribed by Xing-Ming Kou; Yan Hu; Zhong Huang; Xiang-Guang Meng; Xian-Cheng Zeng

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
167 KB
Volume
23
Category
Article
ISSN
0256-7660

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✦ Synopsis

Abstract

The catalytic hydrolysis of bis(4‐nitrophenyl)phosphate (BNPP) by lanthanum(III) ion in the presence of amino‐alcoholic ligands: diethanolamine (DEA) and triethanolamine (TEA), was investigated kinetically at 30 Β°C. The results indicated that the dinuclear dihydroxo complexes formed by lanthanum(III) ion with aminoalcoholic ligands might be the catalytically active species which catalyze the hydrolysis of BNPP to different extents and the catalytic mechanism was believed to involve the synergism of double Lewis acid activation of the substrate and an intramolecular nucleophilic attack of a bridging oxo ligand.

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A mild and efficient synthesis of chiral
A mild and efficient synthesis of chiral tetrahydroquinolino pyranose derivatives catalyzed by lanthanum(iii) nitrate hexahydrate
✍ M. Narasimhulu; S. Malla Reddy; K. Rajesh; N. Suryakiran; D. Ramesh; Y. Venkates πŸ“‚ Article πŸ“… 2008 πŸ› John Wiley and Sons 🌐 English βš– 139 KB

## Abstract A mild and highly efficient synthesis of chiral tetrahydroquinolino pyranose derivatives is described. The reaction of a chiral Ξ±,β‐unsaturated aldehyde containing a hydroxyl group with different aryl amines using lanthanum(III) nitrate hexahydrate as a catalyst afforded corresponding c