http://nopr.niscair.res.in/handle/123456789/13540 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/13583 Title: Synthesis of 6-aryl-9-(4-hydroxy-3-ethoxyphenyl)-1,2,4-triazolo [4,3-<i>a</i>][1,8]naphthyridines under microwave irradiation <br/> <br/>Authors: Mogilaiah, K; Jagadeeshwar, K; Rao, A Nageswara <br/> <br/>Abstract: A simple and efficient method for the synthesis of 6-aryl-9-(4-hydroxy-3-ethoxyphenyl)-1,2,4-triazolo[4,3-<i>a</i>][1,8] naphthyrid­ines <b>4 </b>by the oxidation of the corresponding ethylvanillin 3-aryl-1,8-naphthyridin-2-ylhydrazones <b>3 </b>using silicagel supported ferric chloride (SiO₂-FeCl₃) in solvent-free conditions under microwave irradiation has been described. The products are obtained in good yields and in a state of high purity. The structural assignment of compounds <b>3</b> and<b> 4</b> were based on their elemental analyses and spectral data. <br/> <br/>Page(s): 398-401 http://nopr.niscair.res.in/handle/123456789/13582 Title: Decipic acid and 12-acetyl apetalic acid from <i style="">Calophyllum decipiens</i>. Wight <br/> <br/>Authors: Ajithabai, M D; Rameshkumar, B; Jayakumar, G; Varma, Luxmi; Nair, Mangalam S; Ajaikumar; Nair, Gayathri P <br/> <br/>Abstract: Triterpenes, stigmasterol, thwaitesii xanthone, apetalic acid, two new chromanones, decipic acid and 12-acetyl apetalic acid are isolated for the first time from the ethyl acetate extract of the bark of <i style="">Calophyllum decipiens</i>, Guttiferae. Structures are elucidated by spectral studies. Apetalic acid shows appreciable amount of radical scavenging activity on comparison with trolox (standard) using DPPH free radical. It also shows antibacterial activity against <i>Mycobacterium tuberculosis</i> H37Rv at 100 μg/mL using anti-TB drug rifampicin at 0.5 μg/mL. <br/> <br/>Page(s): 393-397 http://nopr.niscair.res.in/handle/123456789/13581 Title: Synthesis, characterization and biological evaluation of allyl, benzyl and 4-nitrobenzyl derivatives of aminopyridinium bromides <br/> <br/>Authors: Muthukumar, C; Nallu, M; Arunachalam, T; Subramanian, M; Balamurugan, C <br/> <br/>Abstract: A new series of allyl, benzyl and 4-nitrobenzyl derivatives of aminopyridiniumbromides have been synthesized and characterized by UV-Vis, IR and ¹H NMR spectra. The antimicrobial activity of these compounds have been evaluated <i style="">invitro</i> against <i>S. aureus</i>, <i>P. murabilis</i>,<i> E. coli</i>, <i>C. albicans</i>,<i> A. niger </i>by disc diffusion method. All the microorganisms tested are found to be sensitive to the test compounds except N-allyl–3–aminopyridiniumbromide which is hygroscopic at room temperature. <br/> <br/>Page(s): 388-392 http://nopr.niscair.res.in/handle/123456789/13580 Title: Synthesis antimicrobial and antioxidant activities of some new 3-indolyl pyra­zolo[2,3-<i style="">c</i>]pyran and its derivatives^† <br/> <br/>Authors: Saundane, Anand R; Manjunatha, Yarlakatti <br/> <br/>Abstract: Some new 6-amino-4-(2′,5′-disubstituted 1<i style="">H</i>-indol-3′-yl)-3-methyl-<i style="">N¹</i>-isonicotinyl-1,4-dihydropyrano[2,3-<i style="">c</i>]pyrazoles have been synthesized and characterized by spectroscopic techniques (¹H NMR, IR and MS) and elemental analysis. These compounds exhibit good antimicrobial and antioxidant activities on screening. <br/> <br/>Page(s): 380-387