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Gupton JT, Yeudall S, Telang N, Hoerrner M, Huff E, Crawford E, Lounsbury K, Kimmel M, Curry W, Harrison A, Juekun W, Shimozono A, Ortolani J, Lescalleet K, Patteson J, Moore-Stoll V, Rohena CC, Mooberry SL, Obaidullah AJ, Kellogg GE, Sikorski JA. Ortho group activation of a bromopyrrole ester in Suzuki-Miyaura cross-coupling reactions: Application to the synthesis of new microtubule depolymerizing agents with potent cytotoxic activities. Bioorg Med Chem 2017; 25:3206-3214. [PMID: 28433513 DOI: 10.1016/j.bmc.2017.04.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 03/30/2017] [Accepted: 04/05/2017] [Indexed: 10/19/2022]
Abstract
New microtubule depolymerizing agents with potent cytotoxic activities have been prepared with a 5-cyano or 5-oximino group attached to a pyrrole core. The utilization of ortho activation of a bromopyrrole ester to facilitate successful Suzuki-Miyaura cross-coupling reactions was a key aspect of the synthetic methodology. This strategy allows for control of regiochemistry with the attachment of four completely different groups at the 2, 3, 4 and 5 positions of the pyrrole scaffold. Biological evaluations and molecular modeling studies are reported for these examples.
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Affiliation(s)
- John T Gupton
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA.
| | - Scott Yeudall
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Nakul Telang
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Megan Hoerrner
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Ellis Huff
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Evan Crawford
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Katie Lounsbury
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Michael Kimmel
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - William Curry
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Andrew Harrison
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Wen Juekun
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Alex Shimozono
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Joe Ortolani
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Kristin Lescalleet
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Jon Patteson
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | | | - Cristina C Rohena
- Department of Pharmacology and Cancer Therapy & Research Center, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Susan L Mooberry
- Department of Pharmacology and Cancer Therapy & Research Center, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Ahmad J Obaidullah
- Department of Medicinal Chemistry & Institute of Structural Biology, Drug Discovery and Development, Virginia Commonwealth University, Richmond, VA 23298, USA
| | - Glen E Kellogg
- Department of Medicinal Chemistry & Institute of Structural Biology, Drug Discovery and Development, Virginia Commonwealth University, Richmond, VA 23298, USA
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Gupton JT, Telang N, Patteson J, Lescalleet K, Yeudall S, Sobieski J, Harrison A, Curry W. The application of formyl group activation of bromopyrrole esters to formal syntheses of lycogarubin C, permethyl storniamide A and lamellarin G trimethyl ether. Tetrahedron 2014; 70:9759-9767. [PMID: 25584014 DOI: 10.1016/j.tet.2014.11.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lycogarubin C, permethyl storniamide A and lamellarin G trimethyl ether are pyrrole containing, natural products, which exhibit interesting biological properties. Such properties include anti-tumor activity on a variety of cancer cell lines including those that confer drug resistance, inhibition of HIV integrase and vascular disrupting activity. We now describe the use of methyl and ethyl 3-bromo-2-formylpyrrole-5-carboxylate as building blocks for the formal synthesis of these three highly functionalized, bioactive pyrroles. These new building blocks will now provide ready access to the natural products and many novel analogs due to the ability to easily modify positions 2,3,4 and 5 of the pyrrole core.
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Affiliation(s)
- John T Gupton
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Nakul Telang
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Jon Patteson
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Kristin Lescalleet
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Scott Yeudall
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - John Sobieski
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Andrew Harrison
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Will Curry
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
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