Barium aluminate nano-powders efficient catalyst for the synthesis of novel benzo[b]thiophene, thieno[2,3-c]thiopyran and thieno[2,3-c]pyridine derivatives
aluminate (BaAl2O4) can be synthesized by a facile solution reaction at room temperature using barium and aluminum salts and 2-aminoethanol as a precipitating agent. The as-prepared sample showed a good reactivity in the synthesis of benzo[b]thiophene, thieno[2,3-c]thiopyran and thieno[2,3-c]pyridine derivatives. Comparatively the method is efficient and eco-friendly, and finally, a range of compounds with
Synthesis of some 3-substituted amino-4,5-tetramethylene thieno[2,3-d][ 1,2,3]-triazin-4(3H)-ones as potential antimicrobial agents
作者:Janardhanan Saravanan、Shamanna Mohan、Jay Jyoti Roy
DOI:10.1016/j.ejmech.2010.05.061
日期:2010.9
A series of 3-Substituted amino-4,5-tetramethylene thieno[2,3-d] [1,2,3]-triazine-4(3 (H) under bar )ones have been synthesized and characterized by UV,IR, 1H NMR, elemental and mass spectral analysis. The title compounds were evaluated for their antimicrobial activity by agar diffusion method against four bacteria and three fungi using Ampicillin and Miconazole nitrate as standards. The compounds Villa, IXa, Xa and XIa showed an antimicrobial efficacy considerably greater than the compounds la to Vila with -H, phenyl and electron donating (activating) groups like methyl, ethyl and tolyl substitutions at R. suggesting that lipophillic groups like chloro, fluoro substitution on the phenyl ring plays an important role in enhancing the antimicrobial properties of this class of compounds.From the screening results it can be concluded that the compounds having the lipophillic groups like chlorophenyl and fluorophenyl groups at R exhibited appreciable antimicrobial activities. Whereas, the compounds are having -H, phenyl and electron donating (activating) groups like methyl, ethyl and tolyl substituents at R were less active against all the organisms used. (C) 2010 Elsevier Masson SAS. All rights reserved.
2-Aminothiophene-3-carboxylates and carboxamides as adenosine A1 receptor allosteric enhancers
作者:George Nikolakopoulos、Heidi Figler、Joel Linden、Peter J. Scammells
DOI:10.1016/j.bmc.2005.11.018
日期:2006.4
Three series of 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene and 2-amino-5,6,7,8-tetrahydrocyclohepta[b]thiophenes with 3-carboxylates and carboxamides have been prepared using the Gewald synthesis and evaluated as AIAR allosteric enhancers. The structure-activity relationships of these classes of compound are described. A number of compounds, notably 7b, are more potent and efficacious than PD81,723 (1). (c) 2005 Elsevier Ltd. All rights reserved.