Diastereoselective synthesis of meso-pillar[6]arenes by bridging between hydroquinone units in an alternating up-and-down manner

We report the first synthesis of bridged pillararenes. Meso-form pillar[6]arenes were diastereo-selectively formed by bridging units of a per-hydroxylated pillar[6]arene in an alternating up-and-down manner with dialkyldichlorosilanes.