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4 International Letters of Chemistry, Physics and Astronomy

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Synthesis, Pharmacological and Insect Antifeedant Activities of some 3-(2-naphthyl)-5-(substituted phenyl)-4,5-dihydroisoxazoles

Thirunarayanan G., Sathiyendiran V.

International Letters of Chemistry, Physics and Astronomy

2015

Vol. 49

1--14

Totally thirty one 3,5-substituted aryl 4,5-dihydro isoxazole derivatives including 3-(2-naphthyl)-5-(substituted phenyl)-4,5-dihydroisoxazole have been synthesized by fly-ash:H2SO4 catalyzed cyclization of hydroxylamine hydrochloride and aryl chalcones under solvent-free conditions. The yields of the isoxazoles are more than 94%. The synthesized isoxazole were characterized by their physical constants and spectral data. The antimicrobial, antioxidant and insect antifeedant activities of the synthesized isoxazoles have been evaluated using a variety of bacterial and fungal species, DPPH radical scavenging and castor-leaf disc bioassay of 4th instar larvae Achoea Janata L methods.

Insect antifeedant potent quinoxalines

Lakshmanan K., Sekar K. G., Sathiyendiran V., Muthuvel I.

International Letters of Chemistry, Physics and Astronomy

2015

Vol. 41

82--87

Some 6-substituted aryl quinoxalines have been prepared and their purities were checked by their physical constants and spectroscopic data reported earlier. The insect antifeedant activities of these quinolones were studied by leaf-discs bio assay method using 4th instar larvae Achoea Janata L.

(E)-N-substitutedbenzylidene-4-methoxyanilines as Insect Antifeedants

Lakshmanan K., Sekar K. G., Sathiyendiran V., Suresh R.

International Letters of Chemistry, Physics and Astronomy

2015

Vol. 41

118--123

Some substituted aryl Schiff’s bases[(E)-N-substitutedbenzylidene-4-methoxyanilines] have been prepared and their purities were checked by their physical constants and spectroscopic data reported earlier. The insect antifeedant activities of these Schiff’s bases have been studied by leafdiscs bio assay method using 4th instar larvae Achoea Janata L.

Insect antifeedant potent unsaturated 1,3-oxazine-2-amines

Thirunarayanan G., Renuka V., Sekar K.G., Lakshmanan K., Anbarasu K.

International Letters of Chemistry, Physics and Astronomy

2014

Vol. 4

66--81

Insect antifeedant activities of some halo substituted aryl 1,3-oxazine-2-amines have been measured using 4th instar larvae Achoea Janata L by castor leaf discs-Dethler’s method. The highly halo substituted oxazine amines have shown good insect antifeedant activities. The 1,3-oxazine amines have been synthesised by greener method by solvent-free cyclization of aryl enones with urea under microwave irradiation. The yields of the oxazines were more than 80 %. The synthesised oxazines were characterized by their physical constants, analytical and spectroscopic data.