Effect of the Environment on the Reactivity of 4′-Substituted Flavones and Isoflavones
✍ Scribed by Elaine A Armelin; Paulo Marcos Donate; Sergio E Galembeck
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- French
- Weight
- 115 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0040-4020
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✦ Synopsis
AbstractÐThe reactivity of ¯avones and iso¯avones, substituted at the 4 H position by several types of electron-withdrawing or electrondonating groups, was studied by FMO theory in the gas-phase and in aqueous solution. The predictions of this theory were consistent with the experimental reactivity of analogue compounds, and also with the stability of the products of reaction of these compounds with different nucleophilic and electrophilic reagents. The preferences found in the gas-phase for the sites of reaction are retained in aqueous solution.
📜 SIMILAR VOLUMES
## Abstract The predominant elimination of the hydrogen atom or the substituent from the 2′‐position in isoflavone derivatives was confirmed by the use of the metastable ion defocusing technique.
The dimensional stability of calcium-substituted yttrium chromite was evaluated over a wide range of temperatures, oxygen partial pressures, and compositions, and compared to data collected for calcium-doped lanthanum chromite. Sample expansion was dependent on the concentrations of the acceptor dop