Saikia, L and DUTTA , D and Dutta, D K
(2012)
Efficient clay supported Ni0 nanoparticles as heterogeneous catalyst for solvent-free
synthesis of Hantzsch polyhydroquinoline.
Catalysis Communications, 19.
pp. 1-4.
ISSN 1566-7367
Abstract
A green and efficient multicomponent one-pot synthesis of Hantzsch polyhydroquinoline was achieved by
the condensation of aldehydes, dimedone, ethylacetoacetate and ammonium acetate at room temperature
using environmentally benign modified Montmorillonite supported Ni0-nanoparticles as catalyst. The well
dispersed Ni0-nanoparticles having a high surface to volume ratio have promising features for the reaction
such as easy removal of the catalyst, solvent-free, shorter reaction time, high product yields (about 95%)
and easy work up procedure. There is no significant effect of electron withdrawing or donating nature of
substituent on aldehydes in the formation of polyhydroquinoline derivatives.
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