Tetrahedron

Template effects. 7. Large unsubstituted crown ethers from polyethylene glycols: Formation, analysis, and purification

CA Vitali, B Masci

Index: Vitali, Chiara Antonini; Masci, Bernardo Tetrahedron, 1989 , vol. 45, # 7 p. 2201 - 2212

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Citation Number: 26

Abstract

Through the reaction of polyethylene glycols with tosyl chloride and heterogeneous KOH in dioxane not only coronands from [12] crown-4 to [24] crown-8 can be obtained but also some larger homologues. A systematic investigation has shown that: i)[27] crown-9 and [30] crown-10 can be formed from nona-and deca-ethylene glycol, respectively, and isolated in pure form; ii) the whole series of polyethylene glycols from tri-to deca-ethylene glycol ...