The total synthesis of the endogenous inflammation resolving eicosanoid resolvin D2 (1) is described. The key steps involved a Wittig reaction between aldehyde 5 and the ylide derived from phosphonium salt 6 to give enyne 17 and condensation of the same ylide with aldehyde 7 to afford enyne 11. Desilylation of 11 followed by hydrozirconation and iodination gave the vinyl iodide 4 and Sonogashira coupling between this compound and enyne 3 provided alkyne 18. Acetonide deprotection, partial reduction and ester hydrolysis then gave resolvin D2 (1).
描述了内源性炎症解决类脂质素resolvin D2(1)的全合成。关键步骤涉及醛5与磷盐6衍生的莱格碱之间的Wittig反应,得到烯烃17,并且相同的莱格碱与醛7的缩合作用产生烯烃11。对11的去硅基化,随后进行氢化锆化和碘化,得到乙烯碘化物4,然后将该化合物与烯烃3进行Sonogashira偶联反应,得到炔烃18。乙酰缩醛去保护,部分还原和酯水解随后得到resolvin D2(1)。