Synthesis of (p-Formylphenyl)azo Calix[4]arenes

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2004,（5）
• 页码范围: 498-501
• 页数: 4页
• 语种: 英文

摘要

Five novel azo calix[4]arenes were reported.The p-aminobenzaldehyde was diazotized with sodium nitrite in aqueous hydrochloride solution.Mono-,bis-,tris- and tetrakis(p-formylphenyl)azo calix[4]arenes (including proximal and distal isomers) were obtained respectively by diazo-coupling in different molar ratio to calix[4]arene (1) under pH=7.5-8.5 at 0-5℃.All (p-formylphenyl)azo calix[4]arenes were characterized by 1H NMR,13C NMR,IR,MS (ESIMS) spectroscopies and elemental analysis.