## Abstract The ^13^C NMR spectra were determined and signals assigned to the various carbons of the alkamines veracevine, germine and zygacine derived from steroidal alkaloids of the ceveratrum class. Assignment of signals was aided by analysis of the partially relaxed spectrum of cervagenine 9,12
Carbon-13 nuclear magnetic resonance spectra of 2H-cyclopenta[d]pyridazines and cyclopenta[c]thiapyran
β Scribed by Anderson, Arthur G.; Tober, Taran Y.
- Book ID
- 126215883
- Publisher
- American Chemical Society
- Year
- 1982
- Tongue
- English
- Weight
- 255 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0021-9568
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π SIMILAR VOLUMES
## Abstract The ^13^C chemical shift data of a series of ketone, alcohol and ester derivatives of Dβhomoandrostane are reported. Homologation effects are discussed, as well as substituent effects on the homologated structures.
## Abstract Carbonβ13 n.m.r. spectra have been obtained for some methyl and phenyl substituted 2__H__βazirines. The higher field resonance of Cβ2 than that of the corresponding aziridine carbon is interpreted in terms of ring strain. Substituent effects on the chemical shifts of the azirine ring ca
REFERENCE DATA causes the electron density to be comparatively lower at C-3 and C-5 than at C-2 and C-4, so that the former signals resonate at lower fields. Distinction between the signals of the C-2/C-4 and C-3/C-5 pairs was achieved by comparing the C-H coupling patterns of 5 and 1. Compounds 1,