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Blackham EE, Knowles JP, Burgess J, Booker-Milburn KI. Combining photochemistry and catalysis: rapid access to sp 3 - rich polyheterocycles from simple pyrroles. Chem Sci 2016; 7:2302-2307. [PMID: 29910920 PMCID: PMC5977501 DOI: 10.1039/c5sc04062k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 12/30/2015] [Indexed: 11/22/2022] Open
Abstract
Use of FEP flow reactor technology allows access to gram quantities of photochemically-generated tricyclic aziridines. These undergo a range of novel palladium-catalyzed ring-opening and cycloaddition reactions, likely driven by their inherent strain, allowing incorporation of further functionality by fusing additional heterocyclic rings onto these already complex polycyclic cores. This rapid, 2-step access to complex sp3 - rich heterocycles should be of interest to those in the fields of drug discovery and natural product synthesis.
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Affiliation(s)
- Emma E Blackham
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; http://www.chm.bris.ac.uk/org/bmilburn/index2.htm
| | - Jonathan P Knowles
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; http://www.chm.bris.ac.uk/org/bmilburn/index2.htm
| | - Jonathan Burgess
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; http://www.chm.bris.ac.uk/org/bmilburn/index2.htm
| | - Kevin I Booker-Milburn
- School of Chemistry , University of Bristol , Cantock's Close , Bristol , BS8 1TS , UK . ; http://www.chm.bris.ac.uk/org/bmilburn/index2.htm
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Adams J, Anderson EC, Blackham EE, Chiu YWR, Clarke T, Eccles N, Gill LA, Haye JJ, Haywood HT, Hoenig CR, Kausas M, Le J, Russell HL, Smedley C, Tipping WJ, Tongue T, Wood CC, Yeung J, Rowedder JE, Fray MJ, McInally T, Macdonald SJF. Structure Activity Relationships of αv Integrin Antagonists for Pulmonary Fibrosis by Variation in Aryl Substituents. ACS Med Chem Lett 2014; 5:1207-12. [PMID: 25408832 DOI: 10.1021/ml5002079] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [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: 05/21/2014] [Accepted: 09/19/2014] [Indexed: 12/21/2022] Open
Abstract
Antagonism of αvβ6 is emerging as a potential treatment of idiopathic pulmonary fibrosis based on strong target validation. Starting from an αvβ3 antagonist lead and through simple variation in the nature and position of the aryl substituent, the discovery of compounds with improved αvβ6 activity is described. The compounds also have physicochemical properties commensurate with oral bioavailability and are high quality starting points for a drug discovery program. Compounds 33S and 43E1 are pan αv antagonists having ca. 100 nM potency against αvβ3, αvβ5, αvβ6, and αvβ8 in cell adhesion assays. Detailed structure activity relationships with these integrins are described which also reveal substituents providing partial selectivity (defined as at least a 0.7 log difference in pIC50 values between the integrins in question) for αvβ3 and αvβ5.
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Affiliation(s)
- James Adams
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Edward C. Anderson
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Emma E. Blackham
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Yin Wa Ryan Chiu
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Thomas Clarke
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Natasha Eccles
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Luke A. Gill
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Joshua J. Haye
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Harvey T. Haywood
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Christian R. Hoenig
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Marius Kausas
- GlaxoSmithKline
Medicines Research Centre, Gunnels
Wood Road, Stevenage SG1
2NY, U.K
| | - Joelle Le
- GlaxoSmithKline
Medicines Research Centre, Gunnels
Wood Road, Stevenage SG1
2NY, U.K
| | - Hannah L. Russell
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Christopher Smedley
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - William J. Tipping
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Tom Tongue
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Charlotte C. Wood
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Jason Yeung
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - James E. Rowedder
- GlaxoSmithKline
Medicines Research Centre, Gunnels
Wood Road, Stevenage SG1
2NY, U.K
| | - M. Jonathan Fray
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Thomas McInally
- University
of Nottingham, School of Chemistry, University of Nottingham, University
Park, Nottingham NG7 2RD, U.K
| | - Simon J. F. Macdonald
- GlaxoSmithKline
Medicines Research Centre, Gunnels
Wood Road, Stevenage SG1
2NY, U.K
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