Complete 1 H and 13 C NMR Chemical Shift Assignments for Some Pentacyclic Oxindole Alkaloids
โ Scribed by Toure, H.; Babadjamian, A.; Balansard, G.; Faure, R.; Houghton, P. J.
- Book ID
- 121185972
- Publisher
- Taylor and Francis Group
- Year
- 1992
- Tongue
- English
- Weight
- 250 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0038-7010
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๐ SIMILAR VOLUMES
The I3C NMR spectra of various 1aminopyrrole derivatives are reported and the chemical shift assignments are discussed. The NMR assignments were confirmed by MNDO calculations.
An NMR study of two known bis-indole alkaloids is described. In addition to conventional 1D NMR methods, 2D shift-correlated NMR experiments [ 1 Hx 1 H-COSY, 1 Hx 13 C-HMQC-1 J(C,H), 1 Hx 13 C-HMBC-n J(C,H) (n D 2 and 3)] and 2D 1 Hx 1 H-NOESY were used for 1 H and 13 C chemical shift assignments of
Complete 13C NMR chemical shift assignments are reported for 32 cyclic and one acyclic 1.3-diketones, either unsubstituted or having one or two substituents at the 2-position. The first two classes exist exclusively in the enol form in (CD,),SO and as mixed tautomers in CDCI,.