13C-2H correlation NMR spectroscopy studies of thein
β Scribed by G.D. Brown
- Book ID
- 111604141
- Publisher
- Springer
- Year
- 2003
- Tongue
- English
- Weight
- 240 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1568-7767
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π SIMILAR VOLUMES
## Abstract The ^13^C NMR chemical shifts of nine acetoxyxanthones are reported and identified. The acetoxy substituent effects have been evaluated and the corresponding shift increments proposed.
The "C NMR chemical shifts for a series of substituted tricycle[ 5.3.0.02.6] decan-3-ones and tricycle[ 5.4.0.02~6]undecan-8-ones derived from [ 2 + 21 photoaddition reactions are assigned and the influence of various substituents is discussed. In general, it was found that substituent shifts are le
&&act-The '%ZNMR chemical shifts of eleven hydroxy-, two hydroxymethoxy xanthones, and xanthone-C-gfucoside, mangiferin. arc presented and analyzed. Hydroxy substituent effects depending on substituent lxmition as well as on shielded ring carbon position have been evaluated. Hydroq substituent incre