Synthesis and biological evaluation of indomethacin analogs possessing a N-difluoromethyl-1,2-dihydropyrid-2-one ring system: A search for novel cyclooxygenase and lipoxygenase inhibitors

A novel class of indomethacin analogs were synthesized wherein a N-difluoromethyl-1,2-dihydropyrid-2-one moiety (5-LOX pharmacophore) was attached at its C-4 or C-5 position via either a C O ( 14a– b) or CH 2 ( 19a– b) linker to the indole N 1-position. In this regard, replacement of the 4-chloroben...

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Veröffentlicht in:Bioorganic & medicinal chemistry letters 2010-10, Vol.20 (19), p.5776-5780
Hauptverfasser: Chowdhury, Morshed A., Huang, Zhangjian, Abdellatif, Khaled R.A., Dong, Ying, Yu, Gang, Velázquez, Carlos A., Knaus, Edward E.
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container_end_page 5780
container_issue 19
container_start_page 5776
container_title Bioorganic & medicinal chemistry letters
container_volume 20
creator Chowdhury, Morshed A.
Huang, Zhangjian
Abdellatif, Khaled R.A.
Dong, Ying
Yu, Gang
Velázquez, Carlos A.
Knaus, Edward E.
description A novel class of indomethacin analogs were synthesized wherein a N-difluoromethyl-1,2-dihydropyrid-2-one moiety (5-LOX pharmacophore) was attached at its C-4 or C-5 position via either a C O ( 14a– b) or CH 2 ( 19a– b) linker to the indole N 1-position. In this regard, replacement of the 4-chlorobenzoyl group present in indomethacin by N-difluoromethyl-1,2-dihydropyrid-2-one-4-(or 5-)carbonyl and N-difluoromethyl-1,2-dihydropyrid-2-one-4-yl(or 5-yl)methylene moieties furnished compounds showing no inhibitory activities against the COX-2/5-LOX enzymes (except for the weak but selective COX-2 inhibitor 19a, COX-2 IC 50 = 31 μM), and moderate in vivo anti-inflammatory activities (except for the methylene compound 19a that was inactive). These structure–activity data indicate replacement of the 4-chlorobenzoyl group present in indomethacin by a N-difluoromethyl-1,2-dihydropyrid-2-one ring system connected by a C O or CH 2 linker is not a suitable approach for the design of dual COX-2/5-LOX inhibitory analogs of indomethacin.
doi_str_mv 10.1016/j.bmcl.2010.07.132
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In this regard, replacement of the 4-chlorobenzoyl group present in indomethacin by N-difluoromethyl-1,2-dihydropyrid-2-one-4-(or 5-)carbonyl and N-difluoromethyl-1,2-dihydropyrid-2-one-4-yl(or 5-yl)methylene moieties furnished compounds showing no inhibitory activities against the COX-2/5-LOX enzymes (except for the weak but selective COX-2 inhibitor 19a, COX-2 IC 50 = 31 μM), and moderate in vivo anti-inflammatory activities (except for the methylene compound 19a that was inactive). These structure–activity data indicate replacement of the 4-chlorobenzoyl group present in indomethacin by a N-difluoromethyl-1,2-dihydropyrid-2-one ring system connected by a C O or CH 2 linker is not a suitable approach for the design of dual COX-2/5-LOX inhibitory analogs of indomethacin.</description><identifier>ISSN: 0960-894X</identifier><identifier>EISSN: 1464-3405</identifier><identifier>DOI: 10.1016/j.bmcl.2010.07.132</identifier><identifier>PMID: 20727750</identifier><language>eng</language><publisher>Amsterdam: Elsevier Ltd</publisher><subject>Animals ; Anti-inflammatory activity ; Anti-Inflammatory Agents - chemical synthesis ; Anti-Inflammatory Agents - chemistry ; Anti-Inflammatory Agents - therapeutic use ; Arachidonate 5-Lipoxygenase - chemistry ; Arachidonate 5-Lipoxygenase - metabolism ; Biological and medical sciences ; Bones, joints and connective tissue. 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identifier ISSN: 0960-894X
ispartof Bioorganic & medicinal chemistry letters, 2010-10, Vol.20 (19), p.5776-5780
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Animals
Anti-inflammatory activity
Anti-Inflammatory Agents - chemical synthesis
Anti-Inflammatory Agents - chemistry
Anti-Inflammatory Agents - therapeutic use
Arachidonate 5-Lipoxygenase - chemistry
Arachidonate 5-Lipoxygenase - metabolism
Biological and medical sciences
Bones, joints and connective tissue. Antiinflammatory agents
Cyclooxygenase 2 - chemistry
Cyclooxygenase 2 - metabolism
Cyclooxygenase 2 Inhibitors - chemical synthesis
Cyclooxygenase 2 Inhibitors - therapeutic use
Cyclooxygenase and 5-lipoxygenase inhibition
Edema - chemically induced
Edema - drug therapy
Indoles - chemical synthesis
Indoles - chemistry
Indoles - therapeutic use
Indomethacin - chemical synthesis
Indomethacin - chemistry
Indomethacin - pharmacology
Indomethacin analogs
Lipoxygenase Inhibitors - chemical synthesis
Lipoxygenase Inhibitors - chemistry
Lipoxygenase Inhibitors - therapeutic use
Medical sciences
N-Difluoromethyl-1,2-dihydropyrid-2-one 5-Lipoxygenase pharmacophore
Pharmacology. Drug treatments
Pyridones - chemical synthesis
Pyridones - chemistry
Pyridones - therapeutic use
Rats
Structure-Activity Relationship
title Synthesis and biological evaluation of indomethacin analogs possessing a N-difluoromethyl-1,2-dihydropyrid-2-one ring system: A search for novel cyclooxygenase and lipoxygenase inhibitors
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