Selective oxidation of thiacalix [4] arenes to the sulfinyl and sulfonyl counterparts and their complexation abilities toward metal ions as studied by solvent extraction

N Morohashi, N Iki, A Sugawara, S Miyano

Index: Morohashi, Naoya; Iki, Nobuhiko; Sugawara, Atsushi; Miyano, Sotaro Tetrahedron, 2001 , vol. 57, # 26 p. 5557 - 5563

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Citation Number: 121

Abstract

Practical methods for the synthesis of sulfinyl-(5, 6) and sulfonylcalix [4] arenes (7, 8) were provided by the selective oxidation of thiacalix [4] arenes (3, 4) with controlled amounts of an oxidant such as NaBO3 or hydrogen peroxide under mild conditions. The coordination ability of thiacalix [4] arene 4 and the sulfinyl and sulfonyl analogs (6, 8) toward a wide variety of metal ions was investigated by solvent extraction and compared to that of the ...