Synthesis of methyl (5Z,8Z,11Z,14Z,17Z)- and (5Z,8Z,11Z,14Z,17E)-[18-14C] eicosapentaenoate
摘要:
In order to have a better insight of the effect of the double bond geometry of EPA on its anti-aggregating properties, methyl ester of [18-C-14] EPA and of its Delta 17t isomer were synthesized from a common intermediate [(3Z,6Z,9Z)-12,12-diethoxydodeca-3,6,9-trienyl]triphenylphosphonium iodide 11 via three sequential Wittig olelination. Labelled methyl ester of EPA 16b and EPA Delta 17t 17b were obtained in near 100% isomeric and radiochemical purities.
Chinesebittersweet, Celastrusangulatus Max., is a widely distributed plant and is used as a traditional insecticide in China. Celangulin V (CA-V), one of the main insecticidal ingredients from the plant, has special insecticidal mechanism. A synthesized compound, 6β-propoxycelangulin V, exhibits more remarkable insecticidal activity against insect pests. In this study, the synthesis of a labeled
In order to have a better insight of the effect of the double bond geometry of EPA on its anti-aggregating properties, methyl ester of [18-C-14] EPA and of its Delta 17t isomer were synthesized from a common intermediate [(3Z,6Z,9Z)-12,12-diethoxydodeca-3,6,9-trienyl]triphenylphosphonium iodide 11 via three sequential Wittig olelination. Labelled methyl ester of EPA 16b and EPA Delta 17t 17b were obtained in near 100% isomeric and radiochemical purities.