Spiro[3.5]nonenyl Meroterpenoid Lactones, Cryptolaevilactones G–L, an Ionone Derivative, and Total Synthesis of Cryptolaevilactone M from <i>Cryptocarya laevigata</i>
作者:Fumika Tsurumi、Yuta Miura、Misaki Nakano、Yohei Saito、Shuichi Fukuyoshi、Katsunori Miyake、David J. Newman、Barry R. O’Keefe、Kuo-Hsiung Lee、Kyoko Nakagawa-Goto
DOI:10.1021/acs.jnatprod.8b00732
日期:2019.9.27
A CH3OH-CH2Cl2 (1:1) extract (N025439) of the leaves and twigs of Cryptocarya laevigata furnished eight new compounds, 1-8. Based on extensive 1D and 2D NMR spectroscopic data examination, the new δ-lactone derivatives 1-6 are monoterpene-polyketide hybrids containing a unique spiro[3.5]nonenyl moiety. Their trivial names, cryptolaevilactones G-L, follow those of the related known meroterpenoids cryptolaevilactones
Cryptocarya laevigata 叶子和树枝的 CH3OH-CH2Cl2 (1:1) 提取物 (N025439) 提供了八种新化合物,1-8。基于广泛的 1D 和 2D NMR 光谱数据检查,新的 δ-内酯衍生物 1-6 是单萜 - 聚酮化合物杂化物,含有独特的螺 [3.5] 壬烯基部分。它们的简单名称cryptolaevilactones GL 遵循相关已知类萜类cryptolaevilactones AF 的名称。Cryptolaevilactone L (6) 含有 11,12-顺式取代基,而其他的cryptolaevilactones 含有反式基团。线性δ-内酯7,cryptolaevilactone M的结构通过各种光谱数据分析表征,绝对构型通过立体选择性烯丙基化和Grubbs烯烃复分解的全合成确定。