Synthesis and anti-inflammatory activity of acetylenic thiophenes
摘要:
A series of acetylenic thiophene derivatives have been synthesized via Pd-catalyzed coupling reaction of 2-(butyltelluro)thiophene with a variety of terminal alkynes. These compounds showed good anti-inflammatory activity in the carrageenin-induced paw edema assay on rats. (C) 2001 Elsevier Science Ltd. All rights reserved.
Suzuki−Miyaura Cross-Coupling Reactions of Aryl Tellurides with Potassium Aryltrifluoroborate Salts
摘要:
Palladium(O)-catalyzed cross-coupling between potassium aryltrifluoroborate salts and aryl tellurides proceeds readily to afford the desired biaryls in good to excellent yield. The reaction seems to be unaffected by the presence of electron-withdrawing or electron-donating substituents in both the potassium aryltrifluoroborate salts and aryl tellurides partners. Biaryls containing a variety of functional groups can be prepared. A chemoselectivity study was also carried out using aryl tellurides bearing halogen atoms in the same compound. In addition, this new version of the Suzuki-Miyaura cross-coupling reaction was monitored by electrospray ionization mass spectrometry where some reaction intermediates were detected and analyzed.
Synthesis of 2-Aryl- and 2,5-Diarylfurans and Thiophenes by Suzuki - Miyaura Reactions Using Potassium Trifluoroborate Salts and Heteroaryltellurides
作者:Giancarlo V. Botteselle、Thomas L. S. Hough、Raphael C. Venturoso、Rodrigo Cella、Adriano S. Vieira、Helio A. Stefani
DOI:10.1071/ch08255
日期:——
The Suzuki–Miyaura cross-coupling reaction of 2-(butyltellanyl) or 2,5-bis-(butyltellanyl)furans and thiophenes with potassium aryltrifluoroborate salts catalyzed by palladium afforded 2-aryl- or 2,5-diaryl-furans and thiophenes in moderate to good yields.
A new approach to organomanganese compounds: the tellurium/manganese exchange reaction
作者:Márcio S. Silva、João V. Comasseto、Alcindo A. Dos Santos
DOI:10.1016/j.tetlet.2010.08.005
日期:2010.10
Diorganomanganese compounds react with aryl, vinyl, and alkynyl tellurides in a tellurium/manganese exchange reaction. The new mixed organomanganese reagents react selectively with electrophiles.
Suzuki−Miyaura Cross-Coupling Reactions of Aryl Tellurides with Potassium Aryltrifluoroborate Salts
作者:Rodrigo Cella、Rodrigo L. O. R. Cunha、Ana E. S. Reis、Daniel C. Pimenta、Clécio F. Klitzke、Hélio A. Stefani
DOI:10.1021/jo052061r
日期:2006.1.1
Palladium(O)-catalyzed cross-coupling between potassium aryltrifluoroborate salts and aryl tellurides proceeds readily to afford the desired biaryls in good to excellent yield. The reaction seems to be unaffected by the presence of electron-withdrawing or electron-donating substituents in both the potassium aryltrifluoroborate salts and aryl tellurides partners. Biaryls containing a variety of functional groups can be prepared. A chemoselectivity study was also carried out using aryl tellurides bearing halogen atoms in the same compound. In addition, this new version of the Suzuki-Miyaura cross-coupling reaction was monitored by electrospray ionization mass spectrometry where some reaction intermediates were detected and analyzed.
Synthesis and anti-inflammatory activity of acetylenic thiophenes
作者:Gilson Zeni、Cristina W Nogueira、Rodrigo B Panatieri、Dagoberto O Silva、Paulo H Menezes、Antonio L Braga、Claudio C Silveira、Hélio A Stefani、Joao B.T Rocha
DOI:10.1016/s0040-4039(01)01703-8
日期:2001.11
A series of acetylenic thiophene derivatives have been synthesized via Pd-catalyzed coupling reaction of 2-(butyltelluro)thiophene with a variety of terminal alkynes. These compounds showed good anti-inflammatory activity in the carrageenin-induced paw edema assay on rats. (C) 2001 Elsevier Science Ltd. All rights reserved.