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Srinivas V, Mohan CD, Baburajeev CP, Rangappa S, Jagadish S, Fuchs JE, Sukhorukov AY, Chandra, Mason DJ, Sharath Kumar KS, Madegowda M, Bender A, Basappa, Rangappa KS. Synthesis and characterization of novel oxazines and demonstration that they specifically target cyclooxygenase 2. Bioorg Med Chem Lett 2015; 25:2931-6. [PMID: 26048794 DOI: 10.1016/j.bmcl.2015.05.047] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/07/2015] [Accepted: 05/15/2015] [Indexed: 12/22/2022]
Abstract
In the present study, we used solution combustion synthesis-bismuth oxide (Bi2O3) as catalyst for the simple and efficient synthesis of 1,2-oxazine based derivatives of 6-fluoro-3-(piperidin-4-yl)benzo[d]isoxazoles, 1-arylpiperazine and carbazoles. (4aR,8aR)-4-(4-Methoxyphenyl)-3-((4-(4-methoxyphenyl)piperazin-1-yl)methyl)-4a,5,6,7,8,8a-hexahydro-4H-benzo[e][1,2]oxazine was found to be the most potent compound with a high degree of selectivity in inhibition towards COX2 (1.7 μM) over COX1 (40.4 μM) demonstrating the significance of 1,2-oxazine derivatives in developing COX2 specific inhibitors. Molecular docking analyses demonstrated that an isoleucine residue in the active site of COX1 is responsible for lower affinity to COX1 and increased potency towards COX2. Overall, our study reveals that the new 1,2-oxazine-based small molecules qualify as lead structures in developing COX2-specific inhibitors for anti-inflammatory therapy.
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Affiliation(s)
- V Srinivas
- Laboratory of Chemical Biology, Department of Chemistry, Bangalore University, Central College Campus, Palace Road, Bangalore 560001, India
| | | | - C P Baburajeev
- Laboratory of Chemical Biology, Department of Chemistry, Bangalore University, Central College Campus, Palace Road, Bangalore 560001, India
| | - Shobith Rangappa
- Frontier Research Center for Post-genome Science and Technology, Hokkaido University, Sapporo 060-0808, Japan
| | - Swamy Jagadish
- Department of Studies in Chemistry, Manasagangotri, University of Mysore, Mysore 570006, India
| | - Julian E Fuchs
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, United Kingdom
| | - Alexey Yu Sukhorukov
- N.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect, 47, Moscow 119991, Russia
| | - Chandra
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysore 570006, India
| | - Daniel J Mason
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, United Kingdom
| | | | - Mahendra Madegowda
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysore 570006, India
| | - Andreas Bender
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, United Kingdom
| | - Basappa
- Laboratory of Chemical Biology, Department of Chemistry, Bangalore University, Central College Campus, Palace Road, Bangalore 560001, India
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