As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. Quality Control of 1,5-Diphenylpenta-1,4-dien-3-one, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 538-58-9
Synthesis of gamma-keto-delta-alkenyl-phosphonates and phosphine oxides as precursors of novel phosphono-pyrazoline and pyrazole derivatives
Herein we report the synthesis of gamma-keto-delta-alkenyl-phosphonates and phosphine oxides by two versions of strategy (a) which involves the addition of dialkyl phosphites to alpha,alpha?-diarylideneketones, and by strategy (b) which utilizes the reaction of P-chlorodiphenylphosphine with diarylidene ketones in acetic acid. On reaction with hydrazine derivatives, gamma-keto-delta-alkenyl-phosphonates and phosphine oxides give 3-phosphonoethylpyrazoline derivatives which can be converted into the corresponding aromatic pyrazoles by oxidative dehydrogenation, using sodium nitrite as oxidizing agent.
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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