Ion-sensitive compounds

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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540456, 546265, C07F 1500, C07D40112

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active

057602310

ABSTRACT:
An ion-sensitive calix(4)arene compound having the formula A.sup.2 +B.sup.2- wherein A represents a cation capable of forming a receptor-substrate complex with an anion, and B represents sulfate, nitrate or borate, characterized in that the cation is an anion receptor represented by the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group wherein substituents are selected from alkyl C(O)NH--, aryl C(O)NH--, alkoxy, aryloxy, alkoxycarbonyl, aryloxycarbonyl, alkylsulfonamido, arylsulfonamido, alkylcarbonyl, alkoxycarbonyl, aryloxycarbonyl, cyano and nitro;

REFERENCES:
Shinkai, J. Org. Chem. 57, 1516 (1992).
Shinkai, Chem. Letters 1990, 835 (1990).
Pappalardo, Tet. Letters 32, 7747 (1991).
Shinkai, Bull. Chem. Soc. Japan 62, 4055 (1989).
Beer, Tetrahedron 48, 9917 (1992).

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