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Intramolecular cyclization strategy: synthesis of 1,3- and 1,2-calix[4]crown-7 and calix[4]crown-9 cone conformers

✍ Scribed by Yu-Xiang Xia; Hao-Hui Zhou; Yue Yin; Nan Qiu; Jun Luo; Guang-Ya Xiang

Book ID: 106389436
Publisher: Springer Netherlands
Year: 2010
Tongue: English
Weight: 322 KB
Volume: 68
Category: Article
ISSN: 0923-0750
DOI: 10.1007/s10847-010-9802-8

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## Abstract A series of inherently chiral calix[4]arenes with cone and partial cone conformations and with crown ether moieties of variable size have been readily synthesized. By taking advantage of the carboxy appendage on the lower rim, these were condensed with the chiral auxiliary (__S__)‐BINOL