Tetrahedron

Regioselective synthesis of calixcrowns derived from p-tert-butylcalix [5] arene

D Kraft, R Arnecke, V Böhmer, W Vogt

Index: Kraft, Dagmar; Arnecke, Ralf; Boehmer, Volker; Vogt, Walter Tetrahedron, 1993 , vol. 49, # 27 p. 6019 - 6024

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Citation Number: 57

Abstract

Alkylation of p-tert-butylcalix [5] arene with oligoethylene glycol-ditosylates in the presence of CsF affords the 1, 3-bridged calix [5] crowns 1a–c in 51 to 72% yield. In the case of hexaethylene glycol the isomeric 1, 2-bridged calix [5] crown-7 2c was obtained additionally. The calixcrowns were further modified by alkylation of the remaining hydroxyl groups.