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The 1,2-alternate conformation of calix[4]arenes: a rare conformation? Dynamic 1H NMR studies of flexible tetraalkylated calix[4]arenes

✍ Scribed by Groenen, Leo C.; Van Loon, Jan Dirk; Verboom, Willem; Harkema, Sybolt; Casnati, Alessandro; Ungaro, Rocco; Pochini, Andrea; Ugozzoli, Franco; Reinhoudt, David N.

Book ID
121205285
Publisher
American Chemical Society
Year
1991
Tongue
English
Weight
990 KB
Volume
113
Category
Article
ISSN
0002-7863

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New methods to obtain 1,2-bridged calix[4]arene-biscrowns in the 1,2-alternate conformation are described. The stereochemistry of the proximal double functionalization reaction is mainly governed by the solvent, the length of the polyether units and the base used to deprotonate the calix[4]arene.