الفهرس 
INTRODUCTION
from reactions of 1,3-dicarbonyl compoundsOnly 14 pages are availabe for public view
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Abstract
The present work was planned to synthesize some new
pyridine derivatives and to study the insecticidal activities of
them against Cowpea Aphid, Aphis craccivora Koch
(Homoptera: Aphididae). Also, the effect of humic acid on the
adsorption of a promising insecticide onto bentonite nanocaly
was evaluated The synthesis of the target compounds started from
malononitrile which on reaction with acetylacetone afforded 3-
cyano-4,6-dimethylpyridin-2(1H)-one (I) that undergo
chlorination with POCl3 to give 2-chloro-3-cyano-4,6-
dimethylpyridine (II). The compound 3-cyano-4,6-
dimethylpyridin-2(1H)-thione (III) was obtained by reaction of
chloro compound (II) with thiourea. Condensation of compound
(III) with benzaldehyde in the presence of few drops of
piperidine resulted in the formation of 3-cyano-4,6-
distyrylpyridin-2(1H)-thione (IV).