Stereoselective Synthesis of Pillar[4]arene[1]cis-diepoxy-p-dione and X-Ray Crystal Structure of Host-Guest System.

Herein, we successfully develop a novel route to give rise to polarity for the pillararenes by the introduction of oxygenated functionalities into pillar[5]arene to stereoselectively synthesize the pillar[4]arene[1]cis-diepoxy-p-dione. Its host-guest properties with different dinitrile molecules were also investigated and characterized by NMR and X-ray crystallography.