Synthesis of novel 4-pyrazolyl-2-oxo-1,2,3,4-tetrahydropyrimidines promoted by phosphotungstic acid
β Scribed by Ganesabaskaran Sivaprasad; Paramasivan T. Peramal
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2005
- Tongue
- English
- Weight
- 69 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0022-152X
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β¦ Synopsis
Abstract
Phosphotungstic acid, a keggin's type heteropoly acid catatalysed Biginelli reaction was carried out using pyrazole aldehyde, ethyl acetoacetate and urea to synthesis novel 4βpyrazolyl β2βoxoβ1,2,3,4βtetrahydropyβ rimidines.
π SIMILAR VOLUMES
Further proof of structure of 2-oxo-4-(3,4-diethoxyphenyl)-5-carbethoxy-6-trifluoromethyl-l,2,3,4-tetrahydropyrimidine was obtained by comparison of the infrared spectrum\* of the compound with that of the 6-methyl analog. The spectra are identical except that a strong band for the C-F bond was foun
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