The formal total synthesis of the marine metabolite (+)-calyculin A is reported. The key steps involve (i) the use of Brown allylboration chemistry to control the relative and absolute stereochemistry of homoallylic alcohol arrays, thus setting eight of the desired stereocenters; (ii) Stille coupling methodology in the construction of the cyano tetraene unit of the natural product; and (iii) a modified CornforthMeyers approach to the synthesis of the oxazole fragment.Key words: calyculin, marine natural product, phosphatase inhibitor, total synthesis, palladium catalyzed coupling reactions, allylboration reactions, aldol reactions, spiroketal, CornforthMeyers oxazole reaction.
报道了海洋代谢产物(+)-卡伊库林A的正式全合成。关键步骤包括(i)使用布朗烯丙基硼化化学来控制同型烯醇阵列的相对和绝对立体化学,从而设置所需的八个立体中心;(ii)在构建天然产物的氰基四烯单元中使用斯蒂尔偶联方法;以及(iii)一种改良的Cornforth-Meyers方法来合成噁唑片段。关键词:卡伊库林,海洋天然产物,磷酸酶抑制剂,全合成,钯催化偶联反应,烯丙基硼化反应,醛缩反应,螺环醚,Cornforth-Meyers噁唑反应。