This type of reactivity has quickly become one of the cornerstones of modern catalysis .In a patent, Recommanded Product: 1,5-Diphenylpenta-1,4-dien-3-one, name is 1,5-Diphenylpenta-1,4-dien-3-one, belongs to chiral-oxygen-ligands compound, introducing its new discovery. Recommanded Product: 1,5-Diphenylpenta-1,4-dien-3-one
Barbituric acid 2 upon Michael addition with dibenzal acetones 1a-c afforded the corresponding diazaspiro derivatives 3a-c. The base-catalyzed condensation of 3a-c with various aromatic aldehydes produces diarylidine derivatives 4a-l. The diarylidene compounds 4a-l on condensation with hydrazine, phenyl hydrazine, hydroxylamine, urea, guanidine carbonate, and hydrazine hydrate with acetic acid afforded their respective in situ oxidized products 5, 6, 7, 8, 9, and 10. The structures of the compounds are ascertained from their analytical and spectral data. Some of the compounds are screened for their biological activities against E. coli, B. cirroflagellosus, A. niger, and C. albicans.
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Reference：
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate