Vinyl nosylates as partner in copper and silver co-catalyzed Sonogashira cross-coupling reactions
作者:Nicolas P. Cheval、Barbara Hoffmann、Anna Dikova、Fatih Sirindil、Philippe Bertus、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1016/j.tet.2018.10.017
日期:2018.12
Vinylnosylates, readily obtained from β-dicarbonyl derivatives, could be efficiently engaged in Sonogashira cross-couplingreactions, either cocatalyzed by copper or silver salts. The para-nitrobenzenesulfonate (nosylate) group allows this coupling to be performed under very mild conditions (room temperature). These new leaving group and mild conditions could be applied to the synthesis of acetylenic
Handy Protocols using Vinyl Nosylates in Suzuki-Miyaura Cross-Coupling Reactions
作者:Anna Dikova、Nicolas P. Cheval、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1002/adsc.201500682
日期:2015.12.14
Vinylnosylates derived from 1,3-dicarbonyl compounds could be engaged in Suzuki–Myaura cross coupling reactions with aryl-, vinyl- and methylboronic acids or trifluoborate derivatives at room temperature in the presence of 2 mol% of [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) [PdCl2(dppf)]. One-pot procedures have been set up for practical and efficient nosylation–cross-coupling reactions
Coumarin sulfonates: As potential leads for ROS inhibition
作者:Uzma Salar、Khalid Mohammed Khan、Almas Jabeen、Aisha Faheem、Muhammad Imran Fakhri、Syed Muhammad Saad、Shahnaz Perveen、Muhammad Taha、Abdul Hameed
DOI:10.1016/j.bioorg.2016.09.006
日期:2016.12
Coumarin sulfonates 4-43 were synthesized by reacting 3-hydroxy coumarin 1, 4-hydroxy coumarin 2 and 6-hydroxy coumarin 3 with different substituted sulfonyl chlorides and subjected to evaluate for their in vitro immunomodulatory potential. The compounds were investigated for their effect on oxidative burst activity of zymosan stimulated whole blood phagocytes using a luminol enhanced chemiluminescence technique. Ibuprofen was used as standard drug (IC50 = 54.2 +/- 9.2 mu M). Eleven compounds 6 (IC50 = 46.60 +/- 14.6 mu M), 8 (IC50 = 11.50 +/- 6.5 mu M), 15 (IC50 = 21.40 +/- 12.2 mu M), 19 (IC50 = 5.75 +/- 0.86 mu M), 22 (IC50 = 10.27 +/- 1.06 mu M), 23 (IC50 = 33.09 +/- 5.61 mu M), 24 (IC50 = 4.93 +/- 0.58 mu M), 25 (IC50 = 21.96 +/- 14.74 mu M), 29 (IC50 = 12.47 +/- 9.2 mu M), 35 (IC50 = 20.20 +/- 13.4 mu M) and 37 (IC50 = 14.47 +/- 5.02 mu M) out of forty demonstrated their potential suppressive effect on production of reactive oxygen species (ROS) as compared to ibuprofen. All the synthetic derivatives 4-43 were characterized by different available spectroscopic techniques such as H-1 NMR, C-13 NMR, EIMS and HRMS. CHN analysis was also performed. (C) 2016 Elsevier Inc. All rights reserved.