Absolute Configuration of Lippifoliane and Africanane Derivatives
作者:Carlos M. Cerda-García-Rojas、Angelina del C. Coronel、Marina E. P. de Lampasona、César A. N. Catalán、Pedro Joseph-Nathan
DOI:10.1021/np050004n
日期:2005.5.1
(3) and application of the octantrule for saturated ketone 1 and the helicity rules for alpha,beta-unsaturated ketones 2 and 3. The results were reinforced by the anomalous dispersion effect observed in the X-ray diffraction analysis of (4S,9S,10R)-4,10,11-tribromo-10,11-seco-lippifoli-1(6)-en-5-one (4) prepared from 2. The biogenetic relationships between lippifolianes 1-3 and africanane derivatives
Integrifolian-1,5-dione and a revised structure for ‘africanone’, biogenetically related sesquiterpene ketones from Lippia integrifolia
作者:César A.N. Catalán、Inés J.S. de Fenik、Gustavo H. Dartayet、Eduardo G. Gros
DOI:10.1016/s0031-9422(00)95227-0
日期:1991.1
fusion of the bicyclo[8.1.0]undecane system in the unique sesquiterpene diketone integrifolian-1,5-dione was found to be cis by X-ray analysis. A revisedstructure was derived for ‘africanone’ after reconsideration of the mass spectral data. The revisedstructure is based on a novel sesquiterpene skeleton and was confirmed by a biomimetic synthesis from integrifolian-1,5-dione.
摘要 通过 X 射线分析发现,独特的倍半萜二酮 integrifolian-1,5-dione 中双环 [8.1.0] 十一烷系统的融合是顺式的。在重新考虑质谱数据后,得出了“非洲酮”的修订结构。修改后的结构基于一种新型倍半萜骨架,并通过 integrifolian-1,5-dione 的仿生合成得到证实。