0000000000526120
AUTHOR
Ricardo Rincon
The formation of pyrazolo[1,5-a]pyrimidines by the reaction of 3-(4-chlorophenyl)pyrazol-5-amine with chalcones
Cyclocondensation reactions of the pyrazol-5-amine 1 and the 1-aryl-3-phenyl-2-propen-1-ones 2a-d yield the 6,7-dihydropyrazolo[1,5-a]pyrimidines 7a-d. Whereas 7a-c can be isolated in pure state, 7d is subjected to a spontaneous oxidation.
ChemInform Abstract: The Formation of Pyrazolo(1,5-a)pyrimidines by the Reaction of 3-(4- Chlorophenyl)pyrazol-5-amine with Chalcones.
Cyclocondensation reactions of the pyrazol-5-amine 1 and the 1-aryl-3-phenyl-2-propen-1-ones 2a-d yield the 6,7-dihydropyrazolo[1,5-a]pyrimidines 7a-d. Whereas 7a-c can be isolated in pure state, 7d is subjected to a spontaneous oxidation.