NISCAIR Online Periodicals Repository Collection: IJC-B Vol.47B(09) [September 2008] http://nopr.niscair.res.in/handle/123456789/1995 The Collection's search engine Search the Channel search http://nopr.niscair.res.in/simple-search Synthesis of p-tert-butylcalix[8]arene ether derivatives http://nopr.niscair.res.in/handle/123456789/3851 Title: Synthesis of p-tert-butylcalix[8]arene ether derivatives <br/> <br/>Authors: Yi, Jianmin; Tang, Kewen; Huang, Saijin; Huang, Kelong <br/> <br/>Abstract: Octaalkylethers 2a-g (alkyl: n-CH<sub>3</sub>, n-C<sub>2</sub>H<sub>5</sub>, n-C<sub>3</sub>H<sub>7</sub>, n-C<sub>4</sub>H<sub>9</sub>, n-C<sub>5</sub>H<sub>11</sub>, n-C<sub>6</sub>H<sub>13</sub>, n-C<sub>8</sub>H<sub>17</sub>) of p-tert-butylcalix[8]arene were prepared by the etheration with NaH as base. The structures of the new compouds were determined by IR, <sup>1</sup>H NMR, elemental analysis and MS spectra. and the study for their application is under way. <br/> <br/>Page(s): 1435-1437 An efficient synthesis of 1,5-benzodiazepines catalysed by GaCl₃ under solvent free conditions http://nopr.niscair.res.in/handle/123456789/2010 Title: An efficient synthesis of 1,5-benzodiazepines catalysed by GaCl₃ under solvent free conditions <br/> <br/>Authors: Kumar, Sanjay; Sandhu, Jagir S <br/> <br/>Abstract: Various 1,5-benzodiazepine derivatives have been synthesized from o-phenylenediamines and ketones using catalytic amount of GaCl₃ (5 mol%) under solvent free conditions. This method is facile, efficient, environmentally benign and affords 1,5-benzodiazepines in excellent yield. <br/> <br/>Page(s): 1463-1466 Synthesis and pharmacological activities of novel furobenzopyrone and benzofuran derivatives http://nopr.niscair.res.in/handle/123456789/2009 Title: Synthesis and pharmacological activities of novel furobenzopyrone and benzofuran derivatives <br/> <br/>Authors: El-Sawy, E R; Shaker, Kamel H; Mandour, A H; El-Din, A Shehab; Abdula, M M <br/> <br/>Abstract: The reactions of 2-cyanoacetohydrazide and 2'-acetyl-2-cyano-acetohydrazide with each of furobenzopyrone derivatives 1a-d and benzofuran derivatives 10a,b have been studied. The structures of the new compounds are confirmed from their elemental analyses and spectral data. Also, the antimicrobial and antiinflammatory activity of the new compounds has been evaluated. <br/> <br/>Page(s): 1451-1462 The structure of Hantzsch coumarin http://nopr.niscair.res.in/handle/123456789/2008 Title: The structure of Hantzsch coumarin <br/> <br/>Authors: Ramesh, P; Das, Anoop T; Mohandass, P; Nagasathya, R <br/> <br/>Abstract: The dimethyl dicoumarin prepared by Hantzsch and Zurcher has been characterized as 4,6-dimethyl-2H,8H-benzo[1,2-b:4,5-b’]dipyran-2,8-dione by unambiguous synthesis of both angular (2a) and linear (2b) pyranocoumarins by Wittig reaction promoted by clay and comparing them with authentic Hantzsch coumarin prepared as described in literature. This is the first record of synthetic proof for the structure of Hantzsch coumarin. <br/> <br/>Page(s): 1447-1450