Pyrazolo[1,5-<i>a</i>]Pyrimidine Derivative as Precursor for Some Novel Pyrazolo[1,5-<i>a</i>]Pyrimidines and Tetraheterocyclic Compounds
作者:Nadia Hanafy Metwally、Magda Ahmed Abdallah、Selima Ali Almabrook
DOI:10.1002/jhet.2590
日期:2017.1
2‐(cyanomethyl)‐5,7‐dimethylpyrazolo[1,5‐a]pyrimidine‐3‐carbonitrile 3 reacted with phenyl isothiocyanate to afford the respective thioanilide derivative 4 that is a novel compound that has been unreported hitherto. The latter was used as a precursor to synthesize several novel polyheterocyclic compounds 9, 12, 15, and 19. Treatment of the enamine derivative of compound 3 with each of hydrazine hydrate
Synthesis, Characterization and in vitro Antibacterial evaluation of New Oxindoles and Spiro-Oxindoles Derivatives
作者:Mohamed hassan、Abdallah Hassane
DOI:10.21608/ejchem.2019.14725.1907
日期:2019.10.16
-carbonitrile 4. Compound 3 react by Michael addition with malononitrile, ethyl 2-cyanoacetate and acetyl acetone to give 6'-amino-2'-(dicyanomethylene)-2-oxo-2',3'-dihydro-1'H-spiro[indoline-3,4'-pyridine]-3',5'-dicarbonitrile 6a, 2'-(dicyanomethylene) 2,6'-dioxospiro[indoline-3,4'-piperidine]-3',5'-dicarbonitrile 6b and 2-(5'-acetyl-3'-cyano-6'-methyl-2-oxo-1'H-spiro[indoline-3,4'-pyridin]-2'(3'H)