En Route to a Molecular Sheaf: Active Metal Template Synthesis of a [3]Rotaxane with Two Axles Threaded through One Ring
作者:Hei Man Cheng、David A. Leigh、Francesca Maffei、Paul R. McGonigal、Alexandra M. Z. Slawin、Jhenyi Wu
DOI:10.1021/ja205167e
日期:2011.8.10
found to be stable with respect to dethreading despite the large ring size of the macrocycle. Through such active template reactions, in principle, a macrocycle should be able to assemble as many axles in its cavity as the size of the ring and the stoppers will allow. A general method for threading multiple axles through a macrocycle adds significantly to the tools available for the synthesis of different
我们报告说,2,2':6',2"-三联吡啶基大环-Ni 配合物可以有效地介导活性金属模板 sp(3)-carbon-to-sp(3) 中具有庞大端基的两个烷基链的穿线-碳均偶联反应,产生了一个罕见的双螺纹 [3] 轮烷的例子,产率高达 51%。X 射线晶体学证实了这种不寻常的结构(第一次在固态下表征了单环双线 [3] 轮烷),并且发现尽管环尺寸很大,但在脱螺纹方面仍保持稳定的宏观周期。通过这种主动模板反应,原则上,大环应该能够在其空腔中组装尽可能多的轴,只要环和塞子的尺寸允许。