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- W1973166387 abstract "Sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester is employed as a recyclable catalyst for the condensation reaction between aromatic aldehydes and 3-methyl-l-phenyl-5-pyrazolone. This condensation reaction was performed in ethanol under refluxing conditions giving 4,4′-alkylmethylene-bis(3-methyl-5-pyrazolones) in 74-90% yields. The heterogeneous catalyst was recycled and used in eleven runs for the reaction between benzaldehyde and 3-methyl-l-phenyl-5-pyrazolone without losing catalytic activity. 4,4′-Alkylmethylene-bis(3-methyl-5-pyrazolones) were synthesized using sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester as a recyclable solid acid catalyst for the condensation reaction between aromatic aldehydes and 3-methyl-l-phenyl-5-pyrazolone." @default.
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- W1973166387 date "2011-09-01" @default.
- W1973166387 modified "2023-09-27" @default.
- W1973166387 title "Sulfuric Acid ([3-(3-Silicapropyl)sulfanyl]propyl)ester as a Recyclable Catalyst for the Synthesis of 4,4′-(Arylmethylene)bis(1H-pyrazol-5-ols)" @default.
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- W1973166387 doi "https://doi.org/10.1016/s1872-2067(10)60260-4" @default.
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