http://nopr.niscair.res.in/handle/123456789/6426 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/6791 Title: New method for the synthesis of 1,3,5-triarylbenzenes <br/> <br/>Authors: Jing, Xiaobi; Xu, Feng; Zhu, Qihua; Ren, Xinfeng; Li, Dong; Yan, Chaoguo; Shi, Yaocheng <br/> <br/>Abstract: Adsorbed on clayfen together with <i style="">p</i>-toluenesulfonic acid and catalytic amount of tin tetrachloride anhydrous (5%), aryl ketones are readily turned to 1,3,5-triarylbenzenes in good yields upon exposure to microwaves under solvent-free conditions. A new method for the synthesis of poly substituted benzene is developed, which is simple and rapid. <br/> <br/>Page(s): 2781-2783 http://nopr.niscair.res.in/handle/123456789/6790 Title: Conventional and ultrasound mediated synthesis of some thiadiazoles, triazoles and oxadiazoles <br/> <br/>Authors: Narwade, S K; Halnor, V B; Dalvi, N R; Gill, C H; Karale, B K <br/> <br/>Abstract: Acid hydrazide <b style="">1 </b>when treated with aryl isothiocyanates gives the compounds <b style="">2.</b> These compounds <b style="">2</b> on ultrasound irradiation in acidic medium give compounds <b style="">3</b> i.e. thiadiazoles and in basic medium gives compounds <b style="">4 </b>i.e. triazoles. These compounds <b style="">2</b> on treatment with I₂/KI and NaOH resulted in compounds <b style="">5 </b>i.e. oxadiazoles. These compounds are synthesized by conventional method as well as ultra sound irradiation method. <br/> <br/>Page(s): 2776-2780 http://nopr.niscair.res.in/handle/123456789/6789 Title: A high amylose starch isolated from the tubers of <i style="">Curcuma aeruginosa</i> <br/> <br/>Authors: Ranjini, C E; Vijayan, K K <br/> <br/>Abstract: NMR spectra of the starch, isolated from <i style="">Curcuma aeruginosa</i> in dimethyl sulphoxide-d_6,contain groups of minor ¹³C, ¹H, or O¹H signals attributable to glycosyl end groups and the absence of other residues associated with branching in amylopectin molecules. The relative intensities of these signals are evaluated in terms of the incidence of end groups, or branches in the starches. The <img src='/image/spc_char/alpha.gif' border=0> configuration of the glucan has been confirmed by treatment with a amylase, and also by its high [<img src='/image/spc_char/alpha.gif' border=0>]_D²⁰value of +118.9.13. ¹³C NMR and ¹H NMR spectral studies show that it is a high amylose starch. X-ray diffraction study reveals B-type polymorphic forms characteristic of high amylose starch. They are also compared with spectrophotometric measurements on the iodine complexing capacity of starches. <br/> <br/>Page(s): 2773-2775 http://nopr.niscair.res.in/handle/123456789/6788 Title: Electroreductive generation of (<i>S</i>)-(+)-N,N-dimethyl-2-(hydroxymethyl)- pyrrolidinium mercury compound for enantioselective synthesis of 2-amino-1-alkyl/aryl ethanols <br/> <br/>Authors: Yadav, Ashok K; Manju, Meera <br/> <br/>Abstract: (<i>S</i>)-(+)-N, N - Dimethyl-2-(hydroxymethyl)-pyrrolidinium (DMHP⁺)-mercury compound mediated enantioselective reduction of aminomethyl alkyl/aryl ketones in dimethyl­formamide-2-propanol (9:1) has been carried out using tetra­butylammonium tetrafluoroborate as a supporting electrolyte. The products viz. 2-amino-1-alkyl/aryl ethanols have been obtained in good yield (68-92%) with 35-91% optical purity and have been assigned (<i>S</i>)-configuration. The pinacol (racemic/meso) deri­vatives are also isolated as minor products (yield 5-20% ) via dimerization of radical anion followed by protonation. <br/> <br/>Page(s): 2770-2772