selected position on the terminal aromatic ring, was prepared in a good yield through Heck coupling and photocyclization reactions. The X-ray crystal structure of the product indicates that its conformation closely resembles that of the unsubstituted hexahelicene, whose idealized symmetry is C2. Both enantiomers of the new helically chiral hexacyclic system have been successfully separated using (R)-
通过Heck偶联和光环化反应,以高收率制备了在末端芳族环的选定位置上带有甲
氧基的新的
硫杂
六环烯。产物的X射线晶体结构表明其构象与理想取代的对称性为C 2的未取代己
烯的构象非常相似。使用(R)-2-邻
苯二甲
酰亚胺基
丙酸氯化物作为手性拆分剂已成功分离出新的螺旋手性六环体系的两种对映体。