The structure of a new phytoecdysone kaladasterone: An application of13C magnetic resonance spectroscopy to structural problems
β Scribed by L. Canonica; B. Danieli; G. Ferrari; M. A. Haimova; J. Krepinsky
- Book ID
- 112658336
- Publisher
- Springer
- Year
- 1973
- Tongue
- English
- Weight
- 211 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1420-682X
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We have examined the utility of the carbon-13 magnetic resonance technique in the area of the diterpenoid alkaloids and wish to report structures for two unknown alkaloids, A and II, which have been isolated in small amounts from Delphinium bicolor Nutt. Assignment of the structures relies on evide
NMR spectral parameters are reported for benzofurazan, 1,2,3-and 2,1,3-benzothiadiazole, and I-methyl-and 2-methyl-benzotriazole. The coupling constants are discussed in conneG tion with the aromaticity of these compounds and the occurrence of partial bond fixation.