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1

Synthesis, spectral studies and insect antifeedant activities of some 4-substituted 1-naphthacyl bromide and its esters

100%

Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2016

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vol. 71

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issue 2

EN

About nine 4-substituted 1-naphthacyl bromides and its esters have been synthesized by greener synthetic method using fly-ash catalyzed water mediated reaction. These acyl bromides and esters have been characterized by their physical constants, Mass, IR and NMR spectral data. These carbonyl frequencies(cm-1) of existed rotomers of these compounds have been assigned and correlated with Hammett substituent constants, F, R and Swain-Lupton’s parameters. The insect antifeedant activities of the synthesized acyl bromide and esters have been evaluated using 4th instar larvae Achoea Janatha L.

2

Aqueous phase fly-ash catalyzed [4+2] Diels-Alder reaction of aryl enones and cyclopentadiene: Synthesis and insect antifeedant activities of aryl bicyclo [2.2.1] heptene-2-yl-methanones

100%

Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2014

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vol. 69

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issue 1-2

EN

A series containing ten aryl 3-(substituted phenyl) bicyclo [2.2.1] heptene-2-yl-methanone derivatives including 3- (substituted phenyl) bicyclo [2.2.1]hepten-2-yl-(pyren-1-yl)- methanones have been synthesized by aqueous phase fly-ash catalyzed [4+2] Diels-Alder cyclo addition reaction of cyclopentadiene and aryl chalcones. The yields of the methanones are more than 60%. The synthesized methanones are characterized by their physical constants and spectral data. The insect antifeedant activities of synthesized methanones have been studied using Dethler’s leaf-discs bioassay method.

3

Hydroxyapatite Catalyzed Cyclization of Aryl Enones: Solvent-Free Efficient Synthesis of Some 4-Aryl-5,6-Dihydro-6-(Substituted Phenyl)-4H-1,3-Oxazine-2-Amines

100%

Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2014

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vol. 69

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issue 1-2

EN

Some 4-aryl-5,6-dihydro-6-(substituted phenyl)-4H-1,3-oxazine- 2-amine derivatives including 4-(4-methyl-1-naphthyl)-5,6- dihydro-6-(substituted phenyl)-4H-1,3-oxazine-2-amines have been synthesised by hydroxyapatite catalyzed solvent-free cyclization of aryl chalcones and urea using microwave irradiation under solventfree condition. The yields of the oxazines were more than 85%. The synthesised oxazine amines have been characterized by their physical constants, analytical and spectroscopic data.

4

Spectral LFER studies in some N-(substituted phenyl) formamides

51%

Thirunarayanan G., Muthuvel I., Sathiyendiran V.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2015

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vol. 70

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issue 2

EN

A series of N-(substituted phenyl) formamides were synthesised by sulphated titania (TiO2-SO4 2-) catalyzed formylation of substituted anilines and formic acid in acetonitrile medium at room temperature. The synthesised formamide derivatives are characterized by their spectral data. The infrared νNH, CO (cm-1) stretches, chemical shifts(δ, ppm) of NH, COH and ipso carbons(Ar-C-NH) were assigned and correlated with Hammett substituent constants using single and multi-regression analysis. From the results of statistical analyses, the effect of substituents on the spectral data have been studied.

5

Solid acidic FeCl3/Bentonite catalyzed solvent-free condensation: Synthesis, spectral studies and antimicrobial activities of some aryl hydrazine Schiff’s bases

51%

Ananthi V., Rajalakshmi K., Muthuvel I., Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2016

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vol. 71

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issue 2

EN

Some aryl hydrazide derivatives have been synthesized including 1-(3-chloro-4-nitrophenyl)-2-(3-substituted benzylidene) hydrazines by FeCl3/Bentonite catalyzed solvent-free condensation of substituted phenyl hydrazine and aldehydes under microwave irradiation. The yields of the hydrazides are more than 70%. The synthesized hydrazides are characterized by the physical constants, micro analysis and spectroscopic data. Effect of catalyst, solvent effect substituent effect and optimization of the catalyst was studied by the percentage of isolated yields. From the catalyst optimization, the present study catalyst gave the better yield of products. The antimicrobial activities of all synthesized of 1-(3-chloro-4-nitrophenyl)-2-(3-substituted benzylidene) hydrazines have been evaluated using Bauer-Kirby disc diffusion method.

6

Synthesis, assessment of substituent effect and antimicrobial activities of some substituted (E)-Nbenzylidene- 5-bromopyridin-2-amines

51%

Senbagam R., Vanangamudi G., Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2015

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vol. 70

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issue 2

EN

A series of substituted (E)-N-benzylidene-5-bromopyridin-2-amine compounds have been synthesized from 5-bromo-2-aminopyridine with different substituted benzaldehydes. The structure of the adducts was confirmed by their physical constants, UV, IR and NMR spectral data. The observed UV absorption maximum λmaxC=N(nm), IR frequencies νC=N(cm-1), The 1H and 13C NMR δ(ppm) chemical shifts values have been correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the spectral data has been studied. The antimicrobial activities of all synthesized imines have been studied using Bauer-Kirby method.

7

Perchloric Acid Catalyzed Condensation of Amine and Aldehydes: Synthesis and Antibacterial Activities of Some Aryl (E)-Imines

51%

Mayavel P., Thirumurthy K., Dineshkumar S., Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2014

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vol. 69

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issue 1-2

EN

A series of Schiff’s bases (aryl E-imines) have been derived from the perchloric acid catalyzed condensation of aryl amines and substituted benzaldehydes. The yield of the Schiff’s bases are more than 80%. The synthesized Schiff’s bases are characterized by their physical constants, analytical and spectroscopical data. The antibacterial activities of these Schiff’s bases have been studied using Bauer-Kirby method.

8

Synthesis, spectral correlation analysis and evaluation of biological activities of some substituted hydrazones

39%

Vijayakumar R., Senbagam R., Rajarajan M., Balaji S., Manikandan V., Vanangamudi G., Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2015

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vol. 70

|

issue 2

EN

Some novel substituted hydrazone derivatives of amino guanidine have been synthesized with different substituted benzaldehydes by condensation method. The synthesized hydrazones were characterized by their physical constants, UV, IR and NMR spectra. The spectral data have been correlated with Hammett substituent constants and Swain–Lupton parameters. From the result of statistical analysis, the effects of substituents on the spectral data have been predicted. The antimicrobial activities of these synthesized hydrazone compounds have been screened by Bauer-Kirby method using human pathogenic bacteria and fungal species. The antimicrobial activities of all synthesized hydrazone compounds have shown significant activity.

9

Synthesis, spectral LFER and antimicrobial activities of some (E)-N׳-(1-(substituted phenyl)ethylidene)benzohydrazides

33%

Manikandan V., Balaji S., Senbagam R., Vijayakumar R., Rajarajan M., Vanangamudi G., Sundararajan R., Arulkumaran R., Thirunarayanan G.

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

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2016

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vol. 71

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issue 2

EN

About eleven substituted (E)-N׳-(1-(substituted phenyl) ethylidene) benzo- hydrazides have been synthesized. They are characterized by their analytical, ultraviolet, infrared and NMR spectral data. The antibacterial and fungal activities of these chalcones have been evaluated.

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9 Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

3 2016

3 2015

3 2014

9 Thirunarayanan G.

3 Senbagam R.

3 Vanangamudi G.

2 Balaji S.

2 Manikandan V.

2 Muthuvel I.

2 Rajarajan M.

2 Vijayakumar R.

1 Ananthi V.

1 Arulkumaran R.

1 Dineshkumar S.

1 Mayavel P.

1 Rajalakshmi K.

1 Sathiyendiran V.

1 Sundararajan R.

1 Thirumurthy K.

Synthesis, spectral studies and insect antifeedant activities of some 4-substituted 1-naphthacyl bromide and its esters

Aqueous phase fly-ash catalyzed [4+2] Diels-Alder reaction of aryl enones and cyclopentadiene: Synthesis and insect antifeedant activities of aryl bicyclo [2.2.1] heptene-2-yl-methanones

Hydroxyapatite Catalyzed Cyclization of Aryl Enones: Solvent-Free Efficient Synthesis of Some 4-Aryl-5,6-Dihydro-6-(Substituted Phenyl)-4H-1,3-Oxazine-2-Amines

Spectral LFER studies in some N-(substituted phenyl) formamides

Solid acidic FeCl3/Bentonite catalyzed solvent-free condensation: Synthesis, spectral studies and antimicrobial activities of some aryl hydrazine Schiff’s bases

Synthesis, assessment of substituent effect and antimicrobial activities of some substituted (E)-Nbenzylidene- 5-bromopyridin-2-amines

Perchloric Acid Catalyzed Condensation of Amine and Aldehydes: Synthesis and Antibacterial Activities of Some Aryl (E)-Imines

Synthesis, spectral correlation analysis and evaluation of biological activities of some substituted hydrazones

Synthesis, spectral LFER and antimicrobial activities of some (E)-N׳-(1-(substituted phenyl)ethylidene)benzohydrazides