Diels−Alder Active-Template Synthesis of Rotaxanes and Metal-Ion-Switchable Molecular Shuttles
作者:James D. Crowley、Kevin D. Hänni、David A. Leigh、Alexandra M. Z. Slawin
DOI:10.1021/ja101029u
日期:2010.4.14
cavity. Lewis acid activation of the double bond causes it to react with an incoming "stoppered" diene, affording the [2]rotaxane in up to 91% yield. Unusually for an active-template synthesis, the metal binding site "lives on" in these rotaxanes. This was exploited in the synthesis of a molecular shuttle containing two different ligating sites in which the position of the macrocycle could be switched