Current time in Korea 03:33 Nov 17 (Sat) Year 2018 KCS KCS Publications
KCS Publications
My Journal Log In Register
HOME > Search > Browsing(JKCS) > Archives

Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 49, Number 4
JKCSEZ 49(4)
August 20, 2005 

 
Title
Borate Zirconia Mediated Knoevenagel Condensation Reaction in Water

Borate Zirconia Mediated Knoevenagel Condensation Reaction in Water
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*
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.

Page
377 - 0
Full Text
PDF