In the field of polyfunctional Lewis acids [1] the preorganisation of the Lewis acidic sites can be achieved employing rigid backbones. Ortho-substituted benzenes [2], peri-substituted naphthalene [3 – 6] and 1,8substituted anthracene [7, 8] offer promising applications as such backbones in the field of host-guest chemistry [9]. Furthermore, these frameworks can induce unusual interactions betw...
