Synthesis of 4,5-Diaryl-1H-pyrazole-3-ol Derivatives as Potential COX-2 Inhibitors
摘要:
4,5-Diaryl-1H-pyrazole-3-ol was utilized as a versatile template to synthesize several classes of compounds such as pyrazolo-oxazines 7, pyrazolo-benzooxazines 9, pyrazolo-oxazoles 10, and its analogues 11a-c as potential COX-2 inhibitors. Compounds 11b,c were successfully synthesized with use of pyridinium p-toluenesulfonate mediated cyclization of the ketal intermediate. Diaryl-pyrazolo-benzooxazepine analogues were synthesized by using Cu-mediated cyclization of the O-alkylated arylbromide intermediate. Arylsulfonamides were synthesized efficiently on a large scale with 4-[4-(4-fluorophenyl)-5-hydroxy-2H-pyrazol-3-yl]benzenesulfonamide 31 template readily synthesized from commercially available 4-sulfamoyl benzoic acid 29. The structure of a representative compound from each class was confirmed by X-ray crystallography. Selected compounds tested for inhibitory activity against COX-1 and COX-2 enzymes showed good selectivity for COX-2 versus COX-1 enzyme.
SULFONYLPHENYLPYRAZOLE COMPOUNDS USEFUL AS COX-2 INHIBITORS
申请人:ABBOTT LABORATORIES
公开号:EP1206474B1
公开(公告)日:2004-05-26
US6472416B1
申请人:——
公开号:US6472416B1
公开(公告)日:2002-10-29
[EN] SULFONYLPHENYLPYRAZOLE COMPOUNDS USEFUL AS COX-2 INHIBITORS<br/>[FR] COMPOSES SULFONYLPHENYLPYRAZOLES UTILES EN TANT QU'INHIBITEURS DE COX-2
申请人:ABBOTT LAB
公开号:WO2001016138A1
公开(公告)日:2001-03-08
The present invention encompasses novel sulfonylphenylpyrazole compounds useful in the treatment of cyclooxygenase-2 mediated diseases.
Synthesis of 4,5-Diaryl-1<i>H</i>-pyrazole-3-ol Derivatives as Potential COX-2 Inhibitors
作者:Meena V. Patel、Randy Bell、Sandra Majest、Rodger Henry、Teodozyj Kolasa
DOI:10.1021/jo049264k
日期:2004.10.1
4,5-Diaryl-1H-pyrazole-3-ol was utilized as a versatile template to synthesize several classes of compounds such as pyrazolo-oxazines 7, pyrazolo-benzooxazines 9, pyrazolo-oxazoles 10, and its analogues 11a-c as potential COX-2 inhibitors. Compounds 11b,c were successfully synthesized with use of pyridinium p-toluenesulfonate mediated cyclization of the ketal intermediate. Diaryl-pyrazolo-benzooxazepine analogues were synthesized by using Cu-mediated cyclization of the O-alkylated arylbromide intermediate. Arylsulfonamides were synthesized efficiently on a large scale with 4-[4-(4-fluorophenyl)-5-hydroxy-2H-pyrazol-3-yl]benzenesulfonamide 31 template readily synthesized from commercially available 4-sulfamoyl benzoic acid 29. The structure of a representative compound from each class was confirmed by X-ray crystallography. Selected compounds tested for inhibitory activity against COX-1 and COX-2 enzymes showed good selectivity for COX-2 versus COX-1 enzyme.