【摘 要】
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This letter reports a novel method for preparing chromogenic calix[4]arenes, in which the 4-aminopyridine was diazotized with isoamyl nitrite in EtONa/EtOH, and
【出 处】
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Chinese Chemical Letters
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This letter reports a novel method for preparing chromogenic calix[4]arenes, in which the 4-aminopyridine was diazotized with isoamyl nitrite in EtONa/EtOH, and mono(azo)-, bis(azo)- and tetra(azo)-substituted calix[4]arenes were obtained as main product respectively by diazo-coupling in different molar ratio to calix[4]arene in non-aqueous solution at 0-5℃.
This letter reports a novel method for preparing chromogenic calix [4] arenes, in which the 4-aminopyridine was diazotized with isoamyl nitrite in EtONa / EtOH, and mono (azo) -, bis (azo) - and tetra (azo) -substituted calix [4] arenes were obtained as main product respectively by diazo-coupling in different molar ratio to calix [4] arene in non-aqueous solution at 0-5 ° C.
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