http://nopr.niscair.res.in/handle/123456789/8777 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/9192 Title: Phase transfer catalyzed synthesis under ultrasonic irradiation and bioactivity of <i>N</i>'-(4, 6-disubstituted-pyrimidin-2-yl)- <i>N</i>-(5-aryl-2-furoyl)thiourea derivatives <br/> <br/>Authors: Ke, Shao-Yong; Wei, Tai-Bao; Xue, Si-Jia; Duan, Li-Ping; Li, Jing-Zhi <br/> <br/>Abstract: Ten new <i>N</i>'-(4, 6-disubstituted-pyrimidin-2-yl)-<i>N</i>-(5-aryl-2-furoyl)thioureas have been synthesized using PEG-400 as solid-liquid phase transfer catalyst under ultrasonic irradiation. Their structures were exactly confirmed by IR, ¹H NMR and elemental analysis. The preliminary biological tests show that compound <b>7b</b> has better inhibitory activities against root and stalk of dicotyledon plant (such as <i>Amaranthus retroflexus</i> <i>L.</i>) in higher concentration. <br/> <br/>Page(s): 1957-1960 http://nopr.niscair.res.in/handle/123456789/9191 Title: Microwave induced solvent – free synthesis of 1-aryl-2-(1<i>E</i>)-arylvinyl- 4-arylmethylene-2-imidazolin-5-ones <br/> <br/>Authors: Maruthikumar, T Venkata; Reddy, V Prabhakar; Rao, P Hanumantha <br/> <br/>Abstract: A microwave – assisted synthesis of the title compounds under solvent-free conditions is described. The yields and reaction time period are noticeably improved in comparison with conventional methods. <br/> <br/>Page(s): 1931-1932 http://nopr.niscair.res.in/handle/123456789/9190 Title: Direct esterification of carboxylic acids with <i style="">p</i>-cresol catalysed by acid activated Indian bentonite <br/> <br/>Authors: Vijayakumar, B; Iyengar, Pushpa; Nagendrappa, Gopalpur; Prakash, B S Jai <br/> <br/>Abstract: Acid activated Indian bentonite (AAIB) catalyst is used for the first time to esterify various carboxylic acids with <i style="">p</i>-cresol in average to excellent yields. Optimisation studies have been carried out for <i style="">p</i>-cresyl stearate synthesis. The catalyst is recoverable and recyclable. <br/> <br/>Page(s): 1950-1953 http://nopr.niscair.res.in/handle/123456789/9189 Title: Anthraquinone glycoside from stem bark, fatty acids and sterols from seeds of <i>Cassia reingera</i> <br/> <br/>Authors: Ledwani, Lalita; Singh, Mukhtar <br/> <br/>Abstract: From the bark of <i>Cassia reingera</i> 1,5,6-trihydroxy-3-methyl-anthraquinone-8-O-<img src='/image/spc_char/alpha.gif' border=0>-L-glucoside has been isolated and its structure elucidated with the help of chemical studies and spectral data. The dyeing property of crude anthraquinone has been studied to develop variety of shades on wool by using different mordants. Sterols and fatty acids have been isolated from the seeds of <i>Cassia reingera</i> and are identified by using GLC techniques by comparison with authentic sample. <br/> <br/>Page(s): 1970-1971