http://nopr.niscair.res.in/handle/123456789/8768 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/9254 Title: Beibersteneolide-a and -b: Two new sesquiterpene lactones from <i style="">Achillea beiberstenii</i> <br/> <br/>Authors: Howiriny, Tawfeq A Al; Mossa, Jaber S; Ahmed, Bahar <br/> <br/>Abstract: The aerial part of <i style="">Achillea beiberstenii</i> (Compositae) has afforded two new sesquiterpene lactones, characterized as 3<img src='/image/spc_char/alpha.gif' border=0>,9<img src='/image/spc_char/beta.gif' border=0>-diacetoxy-1b,10-epoxy-5(4)-en-germacran-6<img src='/image/spc_char/beta.gif' border=0>,12-olide, named as beibersteneolide-a <b style="">1</b>, and 4,9<img src='/image/spc_char/beta.gif' border=0>-dihydroxy-2(1),6(5),11(13)-triene-guaian–7<img src='/image/spc_char/alpha.gif' border=0>,12-olide, designated  as beibersteneolide-b <b style="">2</b>. The structures of the isolated compounds have been elucidated on the basis of spectral studies. <br/> <br/>Page(s): 2538-2544 http://nopr.niscair.res.in/handle/123456789/9253 Title: A study on the reactivity of 1,3-dimethyl-2,6-diphenyl-4-piperidone : Synthesis of some novel heterocycles <br/> <br/>Authors: Padmavathi, V; Reddy, T V Ramana; Reddy, K Audisesha; Padmaja, A; Reddy, D Bhaskar <br/> <br/>Abstract: The reactive functionalities, keto and keto methylene of 1,3-dimethyl-2,6-diphenyl-4-piperidone have been explored to obtain some interesting heterocycles, viz.: tetrahydropyridine, diazepanone, oxazepanone, pyridoindole, thiazolopyridine, furanylmethylene piperidone, pyridopyrimidone and pyridopyrimidinethione by using mirowave, ultrasound and conventional methods. <br/> <br/>Page(s): 2527-2531 http://nopr.niscair.res.in/handle/123456789/9252 Title: Synthesis and antimicrobial activity of some 3-alkyl-4-(arylmethyleneamino)-4,5-dihydro-1<i style="">H</i>-1,2,4-triazol-5-ones <br/> <br/>Authors: Kahveci, Bahittin; Bekircan, Olcay; Karaoğlu, Şengül Alpay <br/> <br/>Abstract: Eight new ethyl N^ı-(3-methyl-4-arylmethyleneamino-4,5-di­hydro-1<i style="">H</i>-1,2,4-triazolyl-5-one)acetates <b style="">2</b> and N^ı-(3-methyl-4-arylmethyleneamino-4,5-dihydro-1<i style="">H</i>-1,2,4-triazolyl-5-one)acetyl­hydrazines <b style="">3</b> have been synthesized. The structures of the compounds have been confirmed by IR and ¹H NMR spectra and microanalysis. The compounds show some antimicrobial activities. Compound <b style="">2a</b> shows antibacterial activity against <i style="">B. subtilis</i>. Compounds <b style="">3a</b>, <b style="">3b</b> and <b style="">3d</b> have antifungal activity against <i style="">Candida</i> species. <br/> <br/>Page(s): 2614-2617 http://nopr.niscair.res.in/handle/123456789/9251 Title: A facile synthesis of 1-hydroxy-5-chloro-benzo[<i>f</i>][2,7]naphthyridines <br/> <br/>Authors: Sampathkumar, N; Ramalingam, S Thiruvaranga; Rajendran, S P <br/> <br/>Abstract: 2-Chloro-3-formyl quinoline on condensation with glycine ethyl ester hydrochloride <b>2a-i</b> has provided the imines which on cyclisation in sulphuric acid or Dowtherm A furnished the 1-hydroxy-5-chloro-benzo[<i>f</i>][2,7]naphthyridines <b>3a-i</b>. An improved yield is observed in dowtherm A. <br/> <br/>Page(s): 2608-2610