framework was developed involving subsequent DDQ-mediated diastereoselective allylation at an oxygen-substituted benzylic position and ring-closing metathesis (RCM) as key transformations. The synthetic utility of the methodology was illustrated by a formal total synthesis of (±)-centrolobine in five steps from the known homoallylic alcohol or in eight steps from the readily available THP-protected glycidol
                                    开发了一种构建芳基化 2,6-顺式二取代二氢
吡喃框架的权宜之计,包括随后在氧取代的苄基位置进行 
DDQ 介导的非对映选择性烯丙基化和闭环复分解 (RCM) 作为关键转化。该方法的合成效用通过 (±)-centrolobine 的正式全合成从已知的高
烯丙醇分五步或从容易获得的 THP 保护的
缩水甘油分八步进行全合成来说明。该路线允许直接获得其他二芳基
庚烷类
天然产物及其具有各种侧链的合成类似物。