Total synthesis of four stereoisomers of (5Z,8Z,10E,14Z)-12-hydroxy-17,18-epoxy-5,8,10,14-eicosatetraenoic acid and their anti-inflammatory activities
作者:Tomomi Goto、Daisuke Urabe、Yosuke Isobe、Makoto Arita、Masayuki Inoue
DOI:10.1016/j.tet.2015.08.047
日期:2015.10
The four stereoisomers of novel lipid mediator 1, (5Z,8Z,10E,14Z)-12-hydroxy-17,18-epoxy-5,8,10,14-eicosatetraenoic acid, were synthesized from six simple fragments. Triyne 2 was convergently assembled through three SN2 alkynylation reactions and one Sonogashira coupling reaction. Two of the three alkynes of 2 were hydrogenated using Lindlar catalyst, while the third alkyne was reduced through formation
的四种立体异构体新的脂质介体1,(5 Ž,8 Ž,10 ê,14 Ž)-12-羟基17,18环氧5,8,10,14二十碳四烯酸,分别从六个简单片段合成。Triyne 2被会聚通过三个S组装Ñ 2炔基化反应和一个Sonogashira偶联反应。三个炔烃的两个2用Lindlar催化剂将其氢化,同时通过形成炔-二钴六羰基配合物并随后还原分解来还原第三种炔,以立体选择性的方式产生所需的四烯结构。接着,在C1两步官能团操作,接着通过同时脱保护和环氧化物的形成,产生了四种异构体,(12小号,17 - [R,18小号) - 1AA,(12小号,17小号,18 - [R )- 1AB,(12 - [R,17 - [R,18小号) - 1BA和(12 - [R,17小号,18[R )- 1BB。本工作允许测定天然存在的绝对结构的1是1AA和1AB,以及两个天然(生物评价1AA,1AB)和两个非天然(1BA,