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2 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.

Aryl Chalcones as Efficient Precursors for Deriving Oxazine: Solvent-free Synthesis and Antimicrobial Activities of some Oxazine-2-amines

Thirunarayanan G., Sundararajan R., Arulkumaran R.

International Letters of Chemistry, Physics and Astronomy

2014

Vol. 4

82--97

A series of some oxazine derivatives has been synthesised by fly-ash:H2SO4 catalyzed solvent-free cyclization of aryl chalcones and urea under microwave irradiation. The yields of the oxazines were more than 85 %. The synthesised oxazines were characterized by their physical constants, analytical and spectroscopic data. The antimicrobial activities of these oxazines have been studied using Bauer-Kirby method.