Ethyl 1-trifluoromethyl-1-hydroxy-3-oxo-phosphonates, the related (methyl)phosphinates and (phenyl)phosphinates, and phosphine oxides were obtained in good yield via direct phosphonylation of acyltrifluoroacetones with diethyl phosphite, ethyl (methyl)phosphonite, ethyl (phenyl)phosphonite, and diphenylphosphine oxide in the presence of triethyl borate. The subsequent dehydration of the selected phosphonates
Discovery of a potent, selective and orally active canine COX-2 inhibitor, 2-(3-difluoromethyl-5-phenyl-pyrazol-1-yl)-5-methanesulfonyl-pyridine
作者:Jin Li、Kristin M.Lundy DeMello、Henry Cheng、Subas M. Sakya、Brian S. Bronk、Robert J. Rafka、Burton H. Jaynes、Carl B. Ziegler、Carolyn Kilroy、Donald W. Mann、Eric L. Nimz、Michael P. Lynch、Michelle L. Haven、Nicole L. Kolosko、Martha L. Minich、Chao Li、Jason K. Dutra、Bryson Rast、Rhonda M. Crosson、Barry J. Morton、Glen W. Kirk、Kathleen M. Callaghan、David A. Koss、Andrei Shavnya、Lisa A. Lund、Scott B. Seibel、Carol F. Petras、Annette Silvia
DOI:10.1016/j.bmcl.2003.10.004
日期:2004.1
Structure-activity relationship (SAR) studies of 2-[3-di(and tri)fluoromethyl-5-arylpyrazol-1-yl]-5-methanesulfonylpyridine derivatives for canine COX enzymes are described. This led to the identification of 12a as a lead candidate for further progression. The in vitro and in vivo activity of 12a for the canine COX-2 enzyme as well as its in vivo efficacy and pharmacokinetic properties in dog are highlighted. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis and Biological Evaluation of the 1,5-Diarylpyrazole Class of Cyclooxygenase-2 Inhibitors: Identification of 4-[5-(4-Methylphenyl)-3- (trifluoromethyl)-1<i>H</i>-pyrazol-1-yl]benzenesulfonamide (SC-58635, Celecoxib)
作者:Thomas D. Penning、John J. Talley、Stephen R. Bertenshaw、Jeffery S. Carter、Paul W. Collins、Stephen Docter、Matthew J. Graneto、Len F. Lee、James W. Malecha、Julie M. Miyashiro、Roland S. Rogers、D. J. Rogier、Stella S. Yu、Gary D. Anderson、Earl G. Burton、J. Nita Cogburn、Susan A. Gregory、Carol M. Koboldt、William E. Perkins、Karen Seibert、Amy W. Veenhuizen、Yan Y. Zhang、Peter C. Isakson
DOI:10.1021/jm960803q
日期:1997.4.1
A series of sulfonamide-containing 1,5-diarylpyrazole derivatives were prepared and evaluated for their ability to block cyclooxygenase-2 (COX-2) in vitro and in vivo. Extensive structure-activity relationship (SAR) work was carried out within this series, and a number of potent and selective inhibitors of COX-2 were identified. Since an early structural lead (1f, SC-236) exhibited an unacceptably long plasma half-life, a number of pyrazole analogs containing potential metabolic sites were evaluated further in vivo in an effort to identify compounds with acceptable pharmacokinetic profiles. This work led to the identification of ii (4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamide, SC-58635, celecoxib), which is currently in phase III clinical trials for the treatment of rheumatoid arthritis and osteoarthritis.
Polar substitutions in the benzenesulfonamide ring of celecoxib afford a potent 1,5-diarylpyrazole class of COX-2 inhibitors
作者:Sunil K. Singh、P.Ganapati Reddy、K.Srinivasa Rao、Braj B. Lohray、P. Misra、Shaikh A. Rajjak、Yeleswarapu K. Rao、A. Venkateswarlu
DOI:10.1016/j.bmcl.2003.10.027
日期:2004.1
Several chemical modifications in the N-1-benzenesulfonamide ring of celecoxib are presented. The series with a hydroxymethyl group adjacent to the sulfonamide was found to be the most potent modification that yielded many compounds selectively active against COX-2 enzyme in vitro. (C) 2003 Elsevier Ltd. All rights reserved.