of , followed by hydroboration and the HMPA mediated dehydration of four hydroxyl groups has resulted in the facile synthesis of the chiral polyquinene, tetracyclo[6.6.0.01,5.08,12]-tetradecane-3,6,10,13-tetraene . This method completely avoids the troublesome fragmentation reactions earlier encountered when the strained tetraone was reacted with nucleophilic reagents.
醛醇缩合法构筑
四氢呋喃的四环聚喹烷骨架,然后进行
硼氢化和HMPA介导的四个羟基的脱
水反应,导致手性聚
喹啉四环[6.6.0.0 1,5 .0 8,12 ] -
十四烷的合成很容易。-3,6,10,13-四烯。该方法完全避免了在应变四酮与亲核试剂反应时较早遇到的麻烦的片段化反应。