首页> 外文期刊>Chemistry and Physics of Lipids >Facile syntheses for (5Z,9Z)-5,9-hexadecadienoic acid, (5Z,9Z)-5,9-nonadecadienoic acid, and (5Z,9Z)-5,9-eicosadienoic acid through a common synthetic route.
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Facile syntheses for (5Z,9Z)-5,9-hexadecadienoic acid, (5Z,9Z)-5,9-nonadecadienoic acid, and (5Z,9Z)-5,9-eicosadienoic acid through a common synthetic route.

机译:通过常见的合成路线轻松合成(5Z,9Z)-5,9-十六碳二烯酸,(5Z,9Z)-5,9-十九碳二烯酸和(5Z,9Z)-5,9-二十二碳二烯酸。

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摘要

The delta 5,9 fatty acids (5Z,9Z)-5,9-hexadecadienoic acid, (5Z,9Z)-5,9-nonadecadienoic acid, and (5Z,9Z)-5,9-eicosadienoic acid were synthesized for the first time in four steps (9-12% overall yield) starting from commercially available 2-(2-bromoethyl)-1,3-dioxolane. The synthetic approach provided enough material to corroborate the structure and stereochemistry of (5Z,9Z)-5,9-nonadecadienoic acid which was recently identified in the flowers of Malvaviscus arboreus (Malvaceae). The novel phospholipids 1-hexadecanoyl-2-[(5Z,9Z)-5,9-eicosadienoyl]-sn-glycer o-3-phosphocholine and 1-octadecanoyl-2-[(5Z,9Z)-5,9-eicosadienoyl]-sn- glycero-3-phosphocholine were also synthesized from commercially available L-alpha-phosphatidylcholine (egg yolk) and characterized by positive ion electrospray mass spectrometry. These are the first examples of unsymmetrical phospholipids with saturated fatty acids at the sn-1 position and delta 5,9 fatty acids at the sn-2 position.
机译:合成了5,9脂肪酸(5Z,9Z)-5,9-十六碳二烯酸,(5Z,9Z)-5,9-十九碳二烯酸和(5Z,9Z)-5,9-二十二碳烯酸。从市售的2-(2-溴乙基)-1,3-二氧戊环开始,分四个步骤进行第一次(总收率9-12%)。合成方法提供了足够的材料来证实(5Z,9Z)-5,9-壬二烯酸的结构和立体化学,该结构最近在大叶锦葵(Malvaviscus arboreus)(锦葵科)的花中被鉴定出。新型磷脂1-十六烷酰基-2-[(5Z,9Z)-5,9-二十二碳酰基] -sn-甘油o-3-磷酸胆碱和1-十八碳酰基-2-[(5Z,9Z)-5,9-二十二碳酰基还由市售的L-α-磷脂酰胆碱(蛋黄)合成了] -sn-甘油-3-磷酸胆碱,并通过阳离子电喷雾质谱法对其进行了表征。这些是不对称磷脂的第一个例子,在sn-1位具有饱和脂肪酸,在sn-2位具有δ5,9脂肪酸。

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