Reevaluation of 13 C NMR data in combination with X-ray diffraction and VCD studies led us to reassign the structure of (À)-epi-presilphiperfolan-1-ol (1), isolated from Anemia tomentosa var. anthriscifolia, to (À)-9-epi-presilphiperfolan-1-ol (2) and to establish its absolute configuration as 1S,4S
Absolute Configuration of 7- epi -Sesquithujene
✍ Scribed by Khrimian, Ashot; Cossé, Allard A.; Crook, Damon J.
- Book ID
- 121240232
- Publisher
- American Chemical Society
- Year
- 2011
- Tongue
- English
- Weight
- 949 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0163-3864
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The NMR spectral analysis of voacangine hydroxyindolenine (2) and of some synthetic derivatives, together with mechanistic considerations, permitted to establish its absolute configuration at C(7) as ( R ). The configuration at C(7) in hydroxyindolenines of the ibogamine series is also discussed and
Osaka, Japan IN the preceding papers,' it was eetabliehed that both the C-4 and the C-10 methyl Bronps in guaiol (I) poeseas the a-configuration. Now the question remains as to whether the eubetituent at C-7 in guaiol is aor $-oriented. In thin rxperiment, an attempt was made to determine the absolu