http://nopr.niscair.res.in/handle/123456789/13043 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/13053 Title: A new modified synthetic method for preparation of N, N-dichlorocarbamates <br/> <br/>Authors: Gutch, Pranav K; Singh, Ravindra; Suryanarayana, M V S <br/> <br/>Abstract: A rapid, efficient, economic and easy to scale method for the effective conversion of carbamates to corresponding <i>N,N-</i>dichlorocarbamates by using calcium hypochlorite in acidic medium has been described. The transformation has been carried out at room temperature with high yield and purity with reduced reaction time. <br/> <br/>Page(s): 1677-1679 Sat, 29 Oct 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/13052 Title: A convenient synthesis of ethyl furo[2,3-<i style="">h</i>] flavone/chromone-8-carboxylates <br/> <br/>Authors: Reddy, S Satyanarayana; Venkati, M; Rao, Y Jayaprakash; Sharma, Kamalesh K; Krupadanam, G L D <br/> <br/>Abstract: The reaction of 8-formyl-7-hydroxyflavones/chromone <b>2a-i </b>with diethyl bromomalonate in the presence of K₂CO₃/toluene and tetrabutylammoniumbromide (TBAB) as a phase transfer catalyst under nitrogen atmosphere affords ethyl furo[2,3-<i style="">h</i>]flavone-8-carboxylates <b style="">3a-h </b>and ethyl 2-(2'-furyl)-3-methyl-furo[2,3-<i style="">h</i>]chromone-8-carboxylate <b>3i</b><b style=""> </b>(Method A).<b style=""> </b>The reaction of <b style="">2a-i</b> with ethyl bromo acetate in powdered K₂CO₃/dioxane affords the same products <b>3a-i </b>(Method B). <br/> <br/>Page(s): 1671-1676 Sat, 29 Oct 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/13051 Title: An efficient FeCl₃ catalyzed synthesis of <img src='http://www.niscair.res.in/jinfo/Beta.gif' border=0>-keto enol ethers under solvent-free microwave irradiation condition <br/> <br/>Authors: Lingaiah, B P Venkat; Yakaiah, T; Shekhar, A Chandra; Kumar, A Ravi; Sathaiah, G; Reddy, G Venkat; Narsaiah, B; Rao, P Shanthan <br/> <br/>Abstract: <img src='http://www.niscair.res.in/jinfo/Beta.gif' border=0>-Keto enol ethers from cyclic 1,3-diketones have been synthesized in very good yield under solvent-free microwave irradiation conditions from differently substituted alcohols and <img src='http://www.niscair.res.in/jinfo/Beta.gif' border=0>-diketones in presence of ferric chloride as catalyst. <br/> <br/>Page(s): 1667-1670 Sat, 29 Oct 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/13050 Title: Synthesis of thiazolyl benzimidazoles and thiazolyl coumarins linked to isoxazole as possible biodynamic agents <br/> <br/>Authors: Rajanarendar, E; Murthy, K Rama; Reddy, M Nagi; Shaik, Firoz Pasha <br/> <br/>Abstract: A new series of linked heterocyclics, 5-(1<i style="">H</i>-benzo[<i style="">d</i>]imidazol-2-yl-methyl)-3-(3-methyl-5-[(<i style="">E</i>)-2-phenyl-1-ethenyl]-4-iso­xazol­yl)-2-aryl-1,3-thiazolan-4-ones <b style="">4</b> and 3-{3-methyl-5-[(<i style="">E</i>)-2-phenyl-1-ethenyl]-4-isoxazolyl}-5-(2-oxo-2<i style="">H</i>-3-chromenyl)-2-ar­yl-1,3-thiazolan-4-ones <b style="">5</b> have been synthesized by the cyclo­condensation of 4-benzalamino-3-methyl-5-styrylisoxazole <b style="">2</b> with mercapto succinic acid followed by cyclization with 1,2-phenylenediamines or salicylaldehydes. Structures of all the newly synthesized compounds <b style="">3-5</b> have been confirmed by spectral and micro analytical data. <br/> <br/>Page(s): 1658-1666 Sat, 29 Oct 2011 22:58:59 GMT