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http://nopr.niscpr.res.in/handle/123456789/42720| Title: | Facile synthesis of 3-(4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl)-1-phenyl-1 H-pyrazole-4-carbaldehyde and its condensation with various active methylene groups |
| Authors: | Venkateshwarlu, P Dubey, P K |
| Keywords: | Phenylhydrazine;3-methyl-1H-pyrazole-5(4H)-one;3-methyl-1-phenyl-pyrazole-5(4H)-one;Meldrum’s acid;Barbituric acid |
| Issue Date: | Sep-2017 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Vilsmeier-Haack formylation of 3-acetyl-4H-pyrido[1,2-a]pyrimidin-4-one 5a-b gives thepyrazole aldehyde i.e.,3-(4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl)-1-phenyl-1H-pyrazole-4-carbaldehyde 6a-b which on condensation with various active methylene group containing compounds 7-10 gives the corresponding Knoevenagel products i.e., 11a,b-14a,b respectively. Structures of all the Knoevenagel products are assigned based on spectral and analytical data. |
| Page(s): | 984-989 |
| ISSN: | 0975-0983(Online); 0376-4699(Print) |
| Appears in Collections: | IJC-B Vol.56B(09) [September 2017] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCB 56B(9) 984-989.pdf | 476.91 kB | Adobe PDF | View/Open |
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