Correct structures of Diels–Alder adducts from the natural cyclolignan thuriferic acid and its 8-epimer
作者:José L. López-Pérez、Andrés Abad、Esther del Olmo、Arturo San Feliciano
DOI:10.1016/j.tet.2005.11.068
日期:2006.3
detailed analysis of one- and two-dimensional 1H and 13C NMR data for the endo and the exo adducts, obtained by Diels–Alder reaction of thuriferic and epithuriferic acids with cyclopentadiene is described. The unequivocal spectral data assignment of the endo and exo structures was complemented with molecular modelling studies and confirmed through X-ray diffraction studies.
一维和二维的详细分析1 H和13个为C NMR数据内切和外切描述加合物,通过thuriferic和epithuriferic羧酸与环戊二烯狄尔斯-阿尔德反应获得的。内在和外在结构的明确光谱数据分配得到了分子建模研究的补充,并通过X射线衍射研究得到证实。