The absolute configuration determination of naturally occurring diacetylenic spiroacetal enol ethers from Artemisia lactiflora
作者:Liang Ma、Fan Ge、Chun-Ping Tang、Chang-Qiang Ke、Xi-Qiang Li、Andreas Althammer、Yang Ye
DOI:10.1016/j.tet.2011.03.022
日期:2011.5
Six new naturally occurring diacetylenic spiroacetal enol ethers, Lactiflodiynes A–F (1–6), together with five known congeners (7–11), were isolated from the whole plant of Artemisia lactiflora (Compositae). The structures were elucidated by extensive spectroscopic methods, X-ray crystallography, chemical transformations, and CD. The absoluteconfiguration of Lactiflodiyne A (1) was determined to be