An approach to calix [6] cryptands with bridgehead carbon atom: Stabilized in-and out-stereoisomers

Y Chen, J Li, Z Zhong, X Lu

Index: Chen, Yuanyin; Li, Jiansen; Zhong, Zhenlin; Lu, Xueran Tetrahedron, 1998 , vol. 54, # 50 p. 15183 - 15188

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Citation Number: 14

Abstract

A new approach to cap 1, 3, 5-trimethyloxy-p-tert-butyl calix [6] arene with 1, 1, 1-tri ( tosyloxyethoxyethoxymethyl) propane to form a pair of separable stabilized in-and out-calix [6] cryptands was reported. After heating 5a or 5b at 280° C, the interconversion between them was not detected by TLC, which provides a direct and non-spectral methodology to obtain unambiguous evidence for the ring immobilization in calix [6] arenes with ...