Stereoselective Synthesis by Olefin Metathesis and Characterization of η-Carotene (7,8,7′,8′-tetrahydro-β,β-carotene)
作者:Noelia Fontán、Rosana Alvarez、Angel R. de Lera
DOI:10.1021/np300230t
日期:2012.5.25
The purported structure of the elusive η-carotene (7,8,7′,8′-tetrahydro-β,β-carotene), a natural C40 carotenoid first detected in the berries of Lonicera japonica and in citrus fruits sixty years ago, has been synthesized by olefin cross-metathesis/dimerization of a C21 polyene derived from trans-7,8-dihydroretinal, thus allowing the full characterization of this highly unstable natural product.
难以捉摸的η-胡萝卜素(7,8,7',8'-四氢-β,β-胡萝卜素)的结构,这是一种天然的C 40类胡萝卜素,最早是在60年前的忍冬属植物的浆果和柑橘类水果中发现的,已经通过反式-7,8-二氢视黄醛衍生的C 21多烯的烯烃交叉复分解/二聚反应合成了α-己内酰胺,因此可以完全表征这种高度不稳定的天然产物。