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Heterocyclic synthesis using nitrilimines: part 14. Synthesis of new pyrazole derivatives
Nitrilimines 1,3-dipolar cycloaddition phthalides pyrazoles
2010/10/18
A new series of 1,3,4,5-tetrasubstituted pyrazoles have been synthesized by the 1,3-dipolar cycloaddition of suitable nitrilimines to 3-propylidene and 3-benzylidene-phthalide. Both analytical and spe...
Picolyl substituted N-heterocyclic carbene/palladium catalyzed Heck reactions
Heck reaction imidazolinium salt palladium
2010/10/18
Novel 1,3-dialkylimidazolinium and 1,3- dialkyltetrahydropyrimidinium hexafluorophosphate salts as N-heterocyclic carbene precursors were prepared by reacting N,N'-dialkylethandiamine or N,N'-dialkylp...
Synthesis of Some New 4-oxo-4H-Chromene Derivatives Bearing Nitrogen Heterocyclic Systems as Antifungal Agents
Chromone nitrogen heterocycles antifungal activity
2010/4/16
Some new 4-oxo-4H-chromone derivatives bearing nitrogen heterocyclic systems were achieved by treatment of 3-[(4-aminophenylimino) methyl]-6-chloro-4-oxo-4H-chromene (2) with some aldehydes, cyclic ox...
Cyanoacetamide Derivatives as Synthons in Heterocyclic Synthesis
Cyanoacetanilide thiophene pyrazole thiazole pyridine pyridazine pyrimidine heterocycles
2010/4/16
This review presents a systematic and comprehensive survey of the methods of preparation and the chemical reactivity of cyanoacetamide derivatives. These compounds are important intermediates for the ...
Heterocyclic Synthesis Using Nitrilimines: Part 5. Synthesis of Some Novel Spiro Heterocycles
Cycloaddition benzoylhydrazones nitrilimines spiro-triazoles
2010/4/19
A new class of spiro-triazoles (4a-m) were synthesized from the reaction of corresponding nitrilimines 2 with substituted heterocyclic benzoylhydrazones 3 in good yields. The spectral data of the new ...