Effect of Specific Solute-Solvent Interaction and Electron Donor-Acceptor Substituents of Novel Pyrazolo Naphthyridines on Fluorescence

被引：4
|
作者：
Patil, Sandeep R. [1 ]
Shelar, Deepak P. [1 ]
Rote, Ramhari V. [1 ]
Toche, Raghunath B. [1 ]
Jachak, Madhukar N. [1 ]
机构：
[1] KTHM Coll, Organ Chem Res Ctr, Dept Chem, Nasik, MS, India
来源：
JOURNAL OF FLUORESCENCE | 2011年 / 21卷 / 01期
关键词：
Chloroester; Pyrazolo[3,4-b]pyridine-5-carbaldehyde; Pyrazolo[3,4-h] [1,6]naphthyridine; HOMO-LUMO; Quantum yields; Absorption and emission; POTENT;
D O I：
10.1007/s10895-010-0707-0
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
Heterocyclic orthoaminoaldehyde such as 4-amino-3-(4-phenyl)-1-phenyl-1H-Pyrazolo[3,4-b]pyridine-5-carbaldehyde was synthesized by multistep reactions involving reduction of azido derivative 2 with LAH to yield aminoalcohol 3 and oxidation of it with MnO2 to aminoaldehyde 4.The pyridine ring annulated on to 4 by Friedlander condensation using acetophenones in presence of base to obtained pyrazolo[3,4-h][1,6]naphthyridine 5 in excellent yield. Study of photophysical properties of 5 revealed that the absorption and emission of them depends up on the substituents present on benzene ring in newly annulated pyridine ring.
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页码：461 / 471
页数：11
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