Asymmetric Synthesis of (−)-Pterocarine and (−)-Galeon via Chiral Phase Transfer-Catalyzed Atropselective Formation of Diarylether Cyclophane Skeleton
作者:Qiang Ding、Qiuyan Wang、Huan He、Qian Cai
DOI:10.1021/acs.orglett.7b00570
日期:2017.4.7
of diarylether heptanoids (DAEHs) with planar chirality due to the strictly constrained conformations in their molecular skeletons. The characterized oxa[1,7]metapara-cyclophane motifs in DAEHs impose great challenges for their enantioselective synthesis. The asymmetric syntheses of (−)-pterocarine and (−)-galeon are demonstrated by employing a chiral phase transfer-catalyzed highly enantioselective
由于其分子骨架中的构象受到严格限制,因此,萜烯和异戊二烯是具有平面手性的二芳基醚类庚烷(DAEH)的典型实例。DAEHs中特征性的oxa [1,7]甲基对苯二环基序对他们的对映选择性合成提出了巨大挑战。通过使用手性相转移催化的高对映选择性S N Ar环化反应作为形成二芳基醚环烷骨架的关键步骤,证明了(-)-蝶呤和(-)-galeon的不对称合成。