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ISSN 1017-2548(Print) ISSN 2234-8530(Online)
Volume 49, Number 4
JKCSEZ 49(4)
August 20, 2005 |
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Title |
Borate Zirconia Mediated Knoevenagel Condensation Reaction in Water
Borate Zirconia Mediated Knoevenagel Condensation Reaction in Water
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Author |
Santosh S. Shindalkar, Balaji R. Madje, Rajkumar V. Hangarge, Pratap T. Patil, Mohan K. Dongare, Murlidhar S. Shingare*
Santosh S. Shindalkar, Balaji R. Madje, Rajkumar V. Hangarge, Pratap T. Patil, Mohan K. Dongare, Murlidhar S. Shingare*
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Keywords |
Knoevenagel 반응, B2O3/ZrO2, 3-포르밀 크로몬, 포밀 피라졸, 방향족 알데하이드, 물, 불균일 촉매
, Knoevenagel Reaction, B2O3/ZrO2, 3-Formyl Chromone, Formyl Pyrazole, Aromatic Aldehyde, Water, Heterogeneous Catalysis |
Abstract |
4-Oxo-(4H)-1-benzopyran-3-carbaldehydes, 1,3-diphenyl-1H-pyrazol-4-carboxaldehyde 및 방향족 알데하이드와의 3-methyl-1-phenylpyrazolin-5-(4H)-one의 Borate Zirconia (B2O3/ZrO2) 산을 촉매로 사용하여 수용액 상에서 Knoevenagel 축합 반응을 수행하여 생성물을 높은 수득율로 얻을 수 있었다. 각각의 반응에서 촉매는 수거되었고, 수거 후에 수득률과 선택성에서의 손실없이 재 사용을 하였다.
Knoevenagel condensation of 4-oxo-(4H)-1-benzopyran-3-carbaldehydes, 1,3-diphenyl-1H-pyrazol-4- carboxaldehyde and aromatic aldehyde has been carried out with 3-methyl-1-phenylpyrazolin-5-(4H)-one as condensing agent in moderate to good yields by using Borate Zirconia (B2O3/ZrO2) solid acid catalyst in water medium. In each conversion, the catalyst was successfully recovered and recycled without significant loss in yield and selectivity.
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377 - 0 |
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