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Meza-Aviña ME, Lingerfelt MA, Console-Bram LM, Gamage TF, Sharir H, Gettys KE, Hurst DP, Kotsikorou E, Shore DM, Caron MG, Rao N, Barak LS, Abood ME, Reggio PH, Croatt MP. Design, synthesis, and analysis of antagonists of GPR55: Piperidine-substituted 1,3,4-oxadiazol-2-ones. Bioorg Med Chem Lett 2016; 26:1827-1830. [PMID: 26916440 DOI: 10.1016/j.bmcl.2016.02.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 11/04/2015] [Revised: 02/09/2016] [Accepted: 02/11/2016] [Indexed: 12/24/2022]
Abstract
A series of 1,3,4-oxadiazol-2-ones was synthesized and tested for activity as antagonists at GPR55 in cellular beta-arrestin redistribution assays. The synthesis was designed to be modular in nature so that a sufficient number of analogues could be rapidly accessed to explore initial structure-activity relationships. The design of analogues was guided by the docking of potential compounds into a model of the inactive form of GPR55. The results of the assays were used to learn more about the binding pocket of GPR55. With this oxadiazolone scaffold, it was determined that modification of the aryl group adjacent to the oxadiazolone ring was often detrimental and that the distal cyclopropane was beneficial for activity. These results will guide further exploration of this receptor.
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Affiliation(s)
- Maria Elena Meza-Aviña
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Mary A Lingerfelt
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Linda M Console-Bram
- Center for Substance Abuse Research, Temple University, Philadelphia, Pennsylvania 19140, United States
| | - Thomas F Gamage
- Center for Substance Abuse Research, Temple University, Philadelphia, Pennsylvania 19140, United States
| | - Haleli Sharir
- Center for Substance Abuse Research, Temple University, Philadelphia, Pennsylvania 19140, United States
| | - Kristen E Gettys
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Dow P Hurst
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Evangelia Kotsikorou
- Department of Chemistry, University of Texas - Pan American, Edinburg, Texas 78539, United States
| | - Derek M Shore
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Marc G Caron
- Duke University Medical Center, Durham, North Carolina 27709, United States
| | - Narasinga Rao
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Larry S Barak
- Duke University Medical Center, Durham, North Carolina 27709, United States
| | - Mary E Abood
- Center for Substance Abuse Research, Temple University, Philadelphia, Pennsylvania 19140, United States
| | - Patricia H Reggio
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Mitchell P Croatt
- Department of Chemistry and Biochemistry, Natural Products and Drug Discovery Center, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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Althagafy HS, Meza-Aviña ME, Oberlies NH, Croatt MP. Mechanistic study of the biomimetic synthesis of flavonolignan diastereoisomers in milk thistle. J Org Chem 2013; 78:7594-600. [PMID: 23876147 PMCID: PMC3855429 DOI: 10.1021/jo4011377] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The mechanism for the biomimetic synthesis of flavonolignan diastereoisomers in milk thistle is proposed to proceed by single-electron oxidation of coniferyl alcohol, subsequent reaction with one of the oxygen atoms of taxifolin's catechol moiety, and finally, further oxidation to form four of the major components of silymarin: silybin A, silybin B, isosilybin A, and isosilybin B. This mechanism is significantly different from a previously proposed process that involves the coupling of two independently formed radicals.
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Affiliation(s)
- Hanan S Althagafy
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, 435 Sullivan Science Building, P.O. Box 26170, Greensboro, North Carolina 27402, USA
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Meza-Aviña ME, Patel MK, Lee CB, Dietz TJ, Croatt MP. Selective Formation of 1,5-Substituted Sulfonyl Triazoles Using Acetylides and Sulfonyl Azides. Org Lett 2011; 13:2984-7. [DOI: 10.1021/ol200696q] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maria Elena Meza-Aviña
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Mudita Kishor Patel
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Cylivia B. Lee
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Thomas J. Dietz
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Mitchell P. Croatt
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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