NISCAIR Online Periodicals Repository Collection: IJC-B Vol.49B(10) [October 2010] http://nopr.niscair.res.in/handle/123456789/10385 The Collection's search engine Search the Channel search http://nopr.niscair.res.in/simple-search Sodium carbonate: A versatile catalyst for Knoevenagel condensation http://nopr.niscair.res.in/handle/123456789/10406 Title: Sodium carbonate: A versatile catalyst for Knoevenagel condensation <br/> <br/>Authors: A Pasha, M; Manjula, Krishnappa; P Jayashankara, V <br/> <br/>Abstract: Catalytic amounts of sodium<b style=""> </b>carbonate (Na<sub>2</sub>CO<sub>3</sub>) catalyze the condensation of aromatic aldehydes with active methylene compounds to afford arylmethylidene products under the grindstone method. The reactions go to completion within 1-5 min at 26ºC and give products in excellent yield. <br/> <br/>Page(s): 1428-1431 An elegant one-pot synthesis of isoxazolo[2,3-<img src='/image/spc_char/alpha.gif' border=0> ]pyrimidines http://nopr.niscair.res.in/handle/123456789/10405 Title: An elegant one-pot synthesis of isoxazolo[2,3-<img src='/image/spc_char/alpha.gif' border=0> ]pyrimidines <br/> <br/>Authors: Rajanarendar, E; Raju, S; Nagi Reddy, M; Rama Murthy, K <br/> <br/>Abstract: An elegant one-pot synthesis of isoxazolo[2,3–<img src='/image/spc_char/alpha.gif' border=0> ]pyrimidines has been achieved by reaction of 3-amino-5-methylisoxazole with 4-arylidene-2-phenyl-5-oxazolones. Treatment of 3-amino-5-methylisoxazole with chalcones also resulted in the formation of isoxazolo[2,3-<img src='/image/spc_char/alpha.gif' border=0> ]pyrimidines in a single step. The structure of the products have been elucidated by spectral and analytical data. <br/> <br/>Page(s): 1422-1427 Microwave-assisted synthesis and antibacterial activity of 1-[3-(3-fluorophenyl) [1,8]naphthyridn-2-yl]-3-(2-oxo-2H-chromenyl)-1H-4-pyrazolecarbaldehydes using solid support http://nopr.niscair.res.in/handle/123456789/10404 Title: Microwave-assisted synthesis and antibacterial activity of 1-[3-(3-fluorophenyl) [1,8]naphthyridn-2-yl]-3-(2-oxo-2H-chromenyl)-1H-4-pyrazolecarbaldehydes using solid support <br/> <br/>Authors: Mogilaiah, K; Shiva Prasad, R; Shiva Kumar, K <br/> <br/>Abstract: A simple and efficient method for the synthesis of 1-[3-(3-fluorophenyl)[1,8]naphthyridn-2-yl]-3-(2-oxo-2<i>H</i>-chromenyl)-<i>H</i>-4-pyrazolecarbaldehydes <b>4</b> from 3-[2-(3-(3-fluorophenyl)[1,8]-naphthyridin-2-yl)ethanhydrazonyl]-2<i>H</i>-2-chromenones (hydra­zones) <b>3</b> in the presence of DMF-POCl<sub>3</sub> (Vilsmeier-Haack reagent) using silica gel as solid support under microwave irradiation is described. The structural assignments to compounds <b style="">3 </b>and <b style="">4 </b>are based on their elemental analyses and spectral data. Compounds <b style="">4</b> have been tested for their antibacterial activity. <br/> <br/>Page(s): 1417-1421 A one-pot synthesis of isoxazolyl benzo[<i style="">b</i>] [1,4] oxazin-3(4<i style="">H</i>)-ones <i>via </i>Smiles rearrangement http://nopr.niscair.res.in/handle/123456789/10403 Title: A one-pot synthesis of isoxazolyl benzo[<i style="">b</i>] [1,4] oxazin-3(4<i style="">H</i>)-ones <i>via </i>Smiles rearrangement <br/> <br/>Authors: Rajanarendar, E; Nagi Reddy, M; Rama Murthy, K <br/> <br/>Abstract: A one-pot synthesis of isoxazolyl benzo[<i style="">b</i>] [1,4]oxazin-3(4<i style="">H</i>)-ones has been achieved by interaction of 2-chlorophenols, chloroacetyl chloride and different isoxazole amines involving Smiles rearrangement from readily available starting materials. <br/> <br/>Page(s): 1413-1416