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<p>Hantzsch synthesis of 1,4-dihydropyridine derivatives over ZnO/ZrO<sub>2</sub><sub> </sub>catalyst under solvent free condition</p>

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Title Statement <p>Hantzsch synthesis of 1,4-dihydropyridine derivatives over ZnO/ZrO<sub>2</sub><sub> </sub>catalyst under solvent free condition</p>
 
Added Entry - Uncontrolled Name B, MANOHAR ; Osmania University Department of chemistry, University College of Science Hydreabad
UGC-SAP, DST-PURSE -II schemes, New Delhi.
 
Uncontrolled Index Term catalysis and analytical chemistry
Hantzsch synthesis; green protocol; zirconia supported zinc; tetragonal phase; 1,4-dihydropyridines
 
Summary, etc. Hantzsch synthesis of 1,4-dihydropyridine derivatives is accomplished using novel and efficient ZnO/ZrO<sub>2</sub> catalyst. The catalysts prepared by facile precipitation and wet impregnation method have been characterized by using techniques like XRD, SEM, EDS, UV-diffuse reflectance spectra, FTIR, XPS, BET surface area. Ex situ Pyridine absorption FTIR spectroscopy is used to determine the Bronsted and Lewis acidic sites. Enhanced activity of the zirconia supported zinc catalyst is attributed to tetragonal phase, more acidic sites and high surface area of the catalyst. The products attained in good to excellent yields in short duration under solvent free condition, minimizing the disposal problem and energy dissipation. The catalyst can be reused umpteen times without significant loss in activity.
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2021-09-22 11:25:14
 
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http://op.niscair.res.in/index.php/IJCA/article/view/47445
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 60, ##issue.no## 8 (2021): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/47445/465553502
http://op.niscair.res.in/index.php/IJCA/article/download/47445/0
http://op.niscair.res.in/index.php/IJCA/article/download/47445/465553512
http://op.niscair.res.in/index.php/IJCA/article/download/47445/465553513
http://op.niscair.res.in/index.php/IJCA/article/download/47445/465553515
 
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