A new approach for the synthesis of some pyrazolo[5,1-c]triazines and pyrazolo[1,5-a]pyrimidines containing naphtofuran moiety
✍ Scribed by Abdou O. Abdelhamid; Shokry A. Shokry; Sayed M. Tawfiek
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2011
- Tongue
- English
- Weight
- 193 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0022-152X
- DOI
- 10.1002/jhet.699
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✦ Synopsis
Abstract
Naphtho[2,1‐b]furan‐2‐yl)(8‐phenylpyrazolo[5,1‐c][1,2,4]triazin‐3‐yl)methanone, ([1,2,4]triazolo[3,4‐c][1,2,4]triazin‐6‐yl)(naphtho[2,1‐b]furan‐2‐yl)methanone, benzo[4,5]imidazo[2,1‐c][1,2,4]triazin‐3‐yl‐naphtho[2,1‐b]furan‐2‐yl‐methanone, 5‐(naphtho[2,1‐b]furan‐2‐yl)pyrazolo[1,5‐a]pyrimidine, 7‐(naphtho[2,1‐b]furan‐2‐yl)‐[1,2,4]triazolo[4,3‐a]pyrimidine, 2‐naphtho[2,1‐b]furan‐2‐yl‐benzo[4,5]imidazo[1,2‐a]pyrimidine, pyridine, and pyrazole derivatives are synthesized from sodium salt of 5‐hydroxy‐1‐naphtho[2,1‐b]furan‐2‐ylpropenone and various reagents. The newly synthesized compounds were elucidated by elemental analysis, spectral data, chemical transformation, and alternative synthetic route whenever possible. J. Heterocyclic Chem., (2012).
📜 SIMILAR VOLUMES
## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract Condensation of 4‐aminoantipyrine with ethyl acetoacetate, ethyl benzoylacetate, and ethyl cyanoacetate furnished the corresponding ethyl 3‐(1,2‐dihydro‐1,5‐dimethyl‐2‐phenyl‐3‐oxo‐3H‐pyrazol‐4‐yl)aminoacrylate and 2‐cyano‐__N__‐[(1,2‐dihydro‐1,5‐dimethyl‐2‐phenyl‐3‐oxo‐3__H__‐pyrazol‐4
Thiazolylcyanothioacetanilides react with ␣-haloketones and haloesters to give the corresponding thiophene or thiazole derivatives according to the reaction conditions. Pyrazolo [1,5-a]pyrimidines and pyrazolo [5,1-c]triazines were synthesized by reaction of 3-amino-4-(4Ј-arylthiazol-2Ј-yl)-5-phenyl