## Abstract The 270 MHz ^1^H n.m.r. spectra of some model tetrahydroprotoberberines have been analysed and the dependence of the chemical shifts and the geminal and interbenzylic coupling constants on the conformation examined. Their use for conformational analysis was illustrated on two 8โmethyl s
โฆ LIBER โฆ
Conformational analysis of the dibenzo[a,g]quinolizidines by spectroscopic methods
โ Scribed by Kametani, Tetsuji; Fukumoto, Keiichiro; Ihara, Masataka; Ujiie, Akira; Koizumi, Harumi
- Book ID
- 127224444
- Publisher
- American Chemical Society
- Year
- 1975
- Tongue
- English
- Weight
- 535 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0022-3263
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## Abstract The 12__H__โdibenzo [__d__, __g__] dioxathiocines 2 and 4 are prepared by condensation of the corresponding bis[phenols] 1 and 3 with SOCl~2~ and SCl~2~, respectively. XโRay analysis reveals the presence of the boatโchair (__BC__) form as the only conformer in the solid state of the cyc