For harman, a key molecule in the structure elucidation of f3-carbolie-type plant alkaloids, an unambiguous assignment of the =C N M R spectrum is given, based on two-dimensional INADEQUATE spectroscopy. One-bond carbon-carbon coupling constants have been obtained from one-dimensional INADEQUATE sp
Two-dimensional INADEQUATE 13C NMR Study on Vitamin D3
β Scribed by C. Kruk; A. W. H. Jans; J. Lugtenburg
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 266 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
Two-dimensional INADEQUATE -C NMR spectroscopy has been used to find the carbon-carbon connectivities of the carbon skeleton of vitamin D3. This information leads to the unambiguous assignment of the chemical shifts of alI 27 carbon atoms of vitamin D3.
π SIMILAR VOLUMES
## Abstract Chemical shifts of ^13^Cβ and ^1^HβNMR. spectra of vitamin D~3~ metabolites (**2β7**) are assigned. Substituent effect parameters due to hydroxyl groups are deduced by comparison with vitamin D~3~.
## Abstract The ^1^H and ^13^C NMR spectra of magainin 1, a sterilizing agent of the skin, were studied using twoβdimensional techniques. All the ^1^H and ^13^C NMR resonances were unambiguously determined from a combination of 2D homoβ and heteronuclear NMR spectroscopy.
## Abstract Twoβdimensional INADEQUATE ^13^C NMR was used to establish firmly the carbonβcarbon connectivities present in abietic acid and maleopimaric acid, i.e. the adduct of levopimaric acid and maleic anhydride. This information leads to unambiguous assignments for the 20 and 24 carbon resonanc
The complete assignments of the 13C NMR resonances for eight tetrahydrothiazolo [3,2-d] [1,4] benzodiazepin-3(2H)-ones are reported. The data obtained account for a conformational rigidity of the heptatomic ring as a consequence of the annelation of the thiazolidinone nucleus. KEY WORDS '3C NMR Tetr