Synthesis of (ρ‐formylphenyl)azo calix[4]arenes | Zendy

Bal Zhu | Zendy; Yu Lei | Zendy; Lu GuoYuan | Zendy; Guo Xun | Zendy

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Synthesis of (ρ‐formylphenyl)azo calix[4]arenes

Author(s) -

Bal Zhu,

Yu Lei,

Lu GuoYuan,

Guo Xun

Publication year - 2004

Publication title -

chinese journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.28

H-Index - 41

eISSN - 1614-7065

pISSN - 1001-604X

DOI - 10.1002/cjoc.20040220521

Subject(s) - chemistry , molar ratio , calixarene , diazo , aqueous solution , proton nmr , hydrochloride , sodium nitrite , medicinal chemistry , organic chemistry , catalysis , molecule

Five novel azo calix[4]arenes were reported. The p ‐aminobenzaldehyde was diazotized with sodium nitrite in aqueous hydrochloride solution. Mono‐, bis‐, his‐ 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 C. All ( p ‐formylphenyl)azo calix[4]arenes were characterized by 'H NMR, 13 C NMR, IR, MS (ESIMS) spectroscopies and elemental analysis.

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