期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 20, 页码 5961-5965出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201510954
关键词
acid derivatives; hydrogen transfer; organic-inorganic hybrid composites; organocatalysis; polyoxometalates
资金
- CNRS
- Region Rhone-Alpes
- CPE Lyon
- Universite Claude Bernard Lyon 1
- ENS Lyon
- TGIR RMN-THC FR [3050]
The Dawson tungstovanadate [P2W15V3O62](9-) can be grafted to secondary diolamides. The electron-withdrawing character of the polyanion increases the acidity of the amide proton, leading to an organo-polyoxometalate, which can be used as a BrOnsted organocatalyst. High-field NMR and DFT modeling indicate that the amide proton stays on the nitrogen and that the exalted acidity derives from the interaction between the organic and inorganic parts of the organo-polyoxometalate. The amide-inserted vanadotungstates thus form a new family of (hybrid) heteropolyacids, offering new perspectives for the application of POM-based catalysis in organic synthesis.
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