Molecular modelling, synthesis and biological activity of methyl 3-methyljasmonate and related derivatives
作者:Jane L. Ward、Paul Gaskin、Michael H. Beale、Richard Sessions、Yasunori Koda、Claus Wasternack
DOI:10.1016/s0040-4020(97)00485-7
日期:1997.6
Methyl 3-methyljasmonate was synthesised from methyl jasmonate via methyl 3,7-dehydrojasmonate. Molecular modelling predicted an increase in the proportion of cis-orientated side-chains for equilibrated 3-methyl-substituted jasmonate. The synthetic 3-methyljasmonate was shown by gc-ms analysis to equilibrate to a 2:1 ratio of isomers, which appeared from the NMR spectra to comprise mainly the cis-isomer
由茉莉酸甲酯经由3,7-脱氢茉莉酸甲酯合成3-茉莉酸甲酯。分子模型预测了平衡的3-甲基取代的茉莉酸酯的顺式侧链比例的增加。通过gc-ms分析显示合成的3-甲基茉莉酮酸酯平衡至异构体的2:1比例,这从NMR光谱看来主要包含顺式异构体。出人意料的是,3,7-脱氢和3-甲基衍生物在四种成熟的茉莉酸酯生物测定中均无活性。合成了-2-甲基茉莉酮酸甲酯,并且也没有活性。甲基-4,5- dehydrojasmonate制备,通过5-重氮衍生物。这两种化合物均具有低活性。我们的结果是参考先前有关茉莉酸酯结构-活性关系的知识进行讨论的,并表明在茉莉酸酯-受体相互作用中存在严格的空间需求。