Enantiomers of bulky percyclohexylmethyl-substituted pillar[5]arene (Cy-C1-Pillar) were able to be separated by chiral column chromatography, and the separated enantiomers did not racemize. Even though modified with the bulky cyclohexylmethyl-substituents at both rims, Cy-C1-Pillar was able to capture a guest molecule.

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.

Diastereoselective Synthesis of meso-Pillar[6]arenes by Bridging Between Hydroquinone Units in an Alternating Up-and-Down Manner. -(OGOSHI*, T.; DEMACHI, K.; MASAKI, K.; YAMAGISHI, T.-A.; Chem. Commun. (Cambridge) 49 (2013) 38, 3952-3954, http://dx.doi.org/10.1039/c3cc41592a ; Grad. Sch. Nat. Sci. Technol., Kanazawa Univ., Kanazawa 920, Japan; Eng.) -R. Staver 29-039