کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5278910 | 1385614 | 2011 | 4 صفحه PDF | دانلود رایگان |
An oxidation method using dilute nitric acid solutions under solvothermal conditions has been developed to synthesise a series of polypyridine-polycarboxylic acids. It has been successfully applied to a range of methyl substituted polypyridines including symmetrical and asymmetrical 2,2â²-bipyridines; 2,2â²:6â²,2â³-terpyridines and; 2,2â²:6â²,2â³:6â³,2â´-tetra-pyridines and yields crystalline polypyridine-polycarboxylic acids in a single step. Simple product recovery through filtration yields a recyclable filtrate. More forcing conditions led to demethylation of the polypyridine ligand most probably via decarboxylation. This simple approach avoids potentially harmful metal-based oxidants and negates any issues associated with the disposal of their resultant (hazardous) waste.
Journal: Tetrahedron Letters - Volume 52, Issue 9, 2 March 2011, Pages 995-998