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pillararene
Pillararenes are macrocycles composed of hydroquinone units (5 to 10) linked in the para position. They are structurally similar to the cucurbiturils and calixarenes that play an important part in host-guest chemistry. The first pillar()arene macrocycle was the five membered derivative, pillar()arene.〔Ogoshi, T.; Kanai, S.; Fujinami, S.; Yamagishi, T.-a.; Nakamoto, Y., para-bridged symmetrical pillar 5 arenes: Their Lewis acid catalyzed synthesis and host-guest property. J. Am. Chem. Soc. 2008, 130 (15), 5022–5023.〕〔Cao, D.; Kou, Y.; Liang, J.; Chen, Z.; Wang, L.; Meier, H.; A Facile and Efficient Preparation of Pillararenes and a Pillarquinone. Angew. Chem. Int. Ed. 2009, 48, 9721-9723.〕
==History==
1,4-Dimethoxypillar()arene (DMpillar()arene), the first pillararene, was reported in 2008 Journal of the American Chemical Society by Tomoki Ogoshi et al. Ogoshi et al catalyzed 1,4-dimethoxybenzene by Lewis Acid with paraformaldehyde to obtain 1,4-dimethoxypillar()arene. The methoxy groups of DMpillar()arene were deprotected using boron tribromide to give pillar()arene. Ogoshi named the new family of host macrocycles “pillararene”, since they are cylindrical or "pillar" in shape and composed of aromatic or "arene" moieties.1 Multiple chemists refer to the macrocycle as "pillarene"〔Tan, L.-L.; Zhang, Y.; Li, B.; Wang, K.; Zhang, S. X.-A.; Tao, Y.; Yang, Y.-W. Selective Recognition of “Solvent” Molecules in Solution and the Solid State by 1,4-Dimethoxypillar()arene Driven by Attractive Forces. New J. Chem. 2014, 38, 845-851.〕 orally as this is often easier to pronounce and remember.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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