Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 533675
Title Rim-Differentiated C5-Symmetric Tiara-Pillar[5]arenes
Author(s) Guo, Minjie; Wang, Xuemei; Zhan, Caihong; Demay-Drouhard, Paul; Li, Wenjiao; Du, Ke; Olson, Mark A.; Zuilhof, Han; Sue, Andrew C.H.
Source Journal of the American Chemical Society 140 (2018)1. - ISSN 0002-7863 - p. 74 - 77.
Department(s) Laboratory for Organic Chemistry
Publication type Refereed Article in a scientific journal
Publication year 2018
Abstract The synthesis of "rim-differentiated" C5-symmetric pillar[5]arenes, whose two rims are decorated with different chemical functionalities, has remained a challenging task. This is due to the inherent statistical nature of the cyclization of 1,4-disubstituted alkoxybenzenes with different substituents, which leads to four constitutional isomers with only 1/16th being rim-differentiated. Herein, we report a "preoriented" synthetic protocol based on FeCl3-catalyzed cyclization of asymmetrically substituted 2,5-dialkoxybenzyl alcohols. This yields an unprecedented 55% selectivity of the C5-symmetric tiara-like pillar[5]arene isomer among four constitutional isomers. Based on this new method, a series of functionalizable tiara-pillar[5]arene derivatives with C5-symmetry was successfully synthesized, isolated, and fully characterized in the solid state.
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