Abstract
Condensation of 3-amino-5-hydroxypyrazole 1 with triacetic acid lactone 2 in refluxed alcohols afforded 2-hydroxy-5,7-dimethylpyrazolo〚1,5- a 〛pyrimidine 3 beside to 7-alkoxycarbonylmethyl-2-hydroxy-5- methylpyrazolo〚1,5- a 〛pyrimidine 4 . Action of hydrazine on compounds 4 yielded 7-hydrazinocarbonylmethyl-2-hydroxy-5-methylpyrazolo〚1,5- a 〛pyrimidine 5 . Condensation of o -phenylenediamines 6 with hydrazide 5 to melting reactants afforded 2-hydroxy-7-〚benzimidazol-2-yl〛methyl-5-methylpyrazolo〚1,5- a 〛pyrimidines 7 . Structures of the obtained products have been assigned by means of spectroscopic measurements. La condensation du 3-amino-5-hydroxypyrazole 1 avec la 4-hydroxy-6-méthylpyran-2-one 2 , à reflux dans différents alcools, conduit à la 2-hydroxy-5,7-diméthylpyrazolo〚1,5- a 〛pyrimidine 3 et aux 7-alkoxycarbonylmethyl-2-hydroxy-5-méthylpyrazolo〚1,5- a 〛pyrimidines 4 . La 7-hydrazinocarbonylméthyl-2-hydroxy-5-méthylpyrazolo〚1,5- a 〛pyrimidine 5 , obtenue par action de l’hydrate hydrazine sur les esters 4 , conduit aux 2-hydroxy-7-〚benzimidazol-2-yl〛méthyl-5-méthylpyrazolo〚1,5- a 〛pyrimidines 7 par condensation avec les o -phénylènediamines 6 à fusion des réactifs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
