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Synthesis of some new annulated pyrazolo-pyrido (or pyrano) pyrimidine, pyrazolopyridine and pyranopyrazole derivatives

SAIED ABDULLAH EL-ASSIERY
GALAL HOSNI SAYED
AHMED FOUDA

Puni tekst: engleski, pdf (82 KB) str. 143-150 preuzimanja: 2.649* citiraj
APA 6th Edition
ABDULLAH EL-ASSIERY, S., HOSNI SAYED, G. i FOUDA, A. (2004). Synthesis of some new annulated pyrazolo-pyrido (or pyrano) pyrimidine, pyrazolopyridine and pyranopyrazole derivatives. Acta Pharmaceutica, 54 (2), 143-150. Preuzeto s https://hrcak.srce.hr/16823
MLA 8th Edition
ABDULLAH EL-ASSIERY, SAIED, et al. "Synthesis of some new annulated pyrazolo-pyrido (or pyrano) pyrimidine, pyrazolopyridine and pyranopyrazole derivatives." Acta Pharmaceutica, vol. 54, br. 2, 2004, str. 143-150. https://hrcak.srce.hr/16823. Citirano 26.06.2019.
Chicago 17th Edition
ABDULLAH EL-ASSIERY, SAIED, GALAL HOSNI SAYED i AHMED FOUDA. "Synthesis of some new annulated pyrazolo-pyrido (or pyrano) pyrimidine, pyrazolopyridine and pyranopyrazole derivatives." Acta Pharmaceutica 54, br. 2 (2004): 143-150. https://hrcak.srce.hr/16823
Harvard
ABDULLAH EL-ASSIERY, S., HOSNI SAYED, G., i FOUDA, A. (2004). 'Synthesis of some new annulated pyrazolo-pyrido (or pyrano) pyrimidine, pyrazolopyridine and pyranopyrazole derivatives', Acta Pharmaceutica, 54(2), str. 143-150. Preuzeto s: https://hrcak.srce.hr/16823 (Datum pristupa: 26.06.2019.)
Vancouver
ABDULLAH EL-ASSIERY S, HOSNI SAYED G, FOUDA A. Synthesis of some new annulated pyrazolo-pyrido (or pyrano) pyrimidine, pyrazolopyridine and pyranopyrazole derivatives. Acta Pharm. [Internet]. 2004 [pristupljeno 26.06.2019.];54(2):143-150. Dostupno na: https://hrcak.srce.hr/16823
IEEE
S. ABDULLAH EL-ASSIERY, G. HOSNI SAYED i A. FOUDA, "Synthesis of some new annulated pyrazolo-pyrido (or pyrano) pyrimidine, pyrazolopyridine and pyranopyrazole derivatives", Acta Pharmaceutica, vol.54, br. 2, str. 143-150, 2004. [Online]. Dostupno na: https://hrcak.srce.hr/16823. [Citirano: 26.06.2019.]

Sažetak
The bifunctional pyrazolopyridine (2) and pyrano-pyrazole (3) derivatives were prepared by the reaction of 2-(2,4-dinitrophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one (1) with p-methoxybenzaldehyde, malononitrile in the presence of ammonium acetate or piperidine, respectively. Compound 2 was used as the key intermediate to prepare the pyrazolo-pyrido-pyrimidine derivatives through its reaction with formic acid, formamide-formic acid-DMF, ammonium thiocyanate or reaction with triethyl orthoformate followed by cyclization with hydrazine hydrate. Reaction of 3 with triethyl orthoformate followed by cyclization with hydrazine hydrate gave the pyrazolo-pyrano-pyrimidine derivative 11. Reaction of ethyl-3-oxo-2-[2-phenyl-diazenyl]butanoate and ethyl 2-[2-(4-chlorophenyl)diazenyl]-3-oxobutanoate with 1 to give the pyrazolone derivatives 13a and 13b was also considered.

Ključne riječi
pyrazolopyridine derivatives; pyranopyrazole derivatives; synthesis

Hrčak ID: 16823

URI
https://hrcak.srce.hr/16823

[hrvatski]

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