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Studies on spiroheterocycles part-I: Installation of biologically active heterocyclic nuclei into spiro compounds derived from cyclohexanone and diphenyl thiobarbituric acid
Diarylidene ketones 1a-c, prepared by the condensation of acetone with different appropriate aldehydes, on Michael addition with 1,3-diphenyl- thiobarbituric acids afford the desired spiro compounds 2a-c. The diarylidene derivatives 3a-1 undergo cyclisation with hydrazine, phenyl hydrazine, hydroxylamine, urea and guanidine carbonate to furnish pyrazole 4a-1, phenyl pyrazole 5a-1, isoxazole 6a-1, pyrimidine 7a-1, and aminopyrimidine 8a-1 compounds, respectively. The structures of all the compounds have been confirmed on the basis of their analytical, IR, NMR and Mass spectral data. The antimicrobial activities of some of the compounds have also been reported.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Quality Control of 1,5-Diphenylpenta-1,4-dien-3-one, you can also check out more blogs about538-58-9
Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate