6533b823fe1ef96bd127e3ae

RESEARCH PRODUCT

The formation of pyrazolo[1,5-a]pyrimidines by the reaction of 3-(4-chlorophenyl)pyrazol-5-amine with chalcones

Herbert MeierNorbert HanoldJairo QuirogaMarina LarrahondoBraulio InsuastyRicardo Rincon

subject

ChemistryYield (chemistry)Organic ChemistryAmine gas treatingMedicinal chemistry

description

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.

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