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Flemmich L, Moreno S, Micura R. Synthesis of O 6-alkylated preQ 1 derivatives. Beilstein J Org Chem 2021; 17:2295-2301. [PMID: 34621392 PMCID: PMC8450960 DOI: 10.3762/bjoc.17.147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 08/27/2021] [Indexed: 12/23/2022] Open
Abstract
A naturally occurring riboswitch can utilize 7-aminomethyl-O6-methyl-7-deazaguanine (m6preQ1) as cofactor for methyl group transfer resulting in cytosine methylation. This recently discovered riboswitch-ribozyme activity opens new avenues for the development of RNA labeling tools based on tailored O6-alkylated preQ1 derivatives. Here, we report a robust synthesis for this class of pyrrolo[2,3-d]pyrimidines starting from readily accessible N2-pivaloyl-protected 6-chloro-7-cyano-7-deazaguanine. Substitution of the 6-chloro atom with the alcoholate of interest proceeds straightforward. The transformation of the 7-cyano substituent into the required aminomethyl group turned out to be challenging and was solved by a hydration reaction sequence on a well-soluble dimethoxytritylated precursor via in situ oxime formation. The synthetic path now provides a solid foundation to access O6-alkylated 7-aminomethyl-7-deazaguanines for the development of RNA labeling tools based on the preQ1 class-I riboswitch scaffold.
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Affiliation(s)
- Laurin Flemmich
- Institute of Organic Chemistry, Center for molecular Biosciences Innsbruck (CMBI), Innrain 80-82, 6020 Innsbruck, Austria
| | - Sarah Moreno
- Institute of Organic Chemistry, Center for molecular Biosciences Innsbruck (CMBI), Innrain 80-82, 6020 Innsbruck, Austria
| | - Ronald Micura
- Institute of Organic Chemistry, Center for molecular Biosciences Innsbruck (CMBI), Innrain 80-82, 6020 Innsbruck, Austria
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Shabani-Nooshabadi M, Moradian M, Dadkhah-Tehrani S. A Practical One-Pot Electrochemical Synthesis of Pyrimido[4,5-b]indole Derivatives. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160250] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Khalaf A, Huggan JK, Suckling CJ, Gibson C, Stewart K, Giordani F, Barrett MP, Wong PE, Barrack KL, Hunter WN. Structure-based design and synthesis of antiparasitic pyrrolopyrimidines targeting pteridine reductase 1. J Med Chem 2014; 57:6479-94. [PMID: 25007262 PMCID: PMC4136963 DOI: 10.1021/jm500483b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The treatment of Human African trypanosomiasis remains a major unmet health need in sub-Saharan Africa. Approaches involving new molecular targets are important; pteridine reductase 1 (PTR1), an enzyme that reduces dihydrobiopterin in Trypanosoma spp., has been identified as a candidate target, and it has been shown previously that substituted pyrrolo[2,3-d]pyrimidines are inhibitors of PTR1 from Trypanosoma brucei (J. Med. Chem. 2010, 53, 221-229). In this study, 61 new pyrrolo[2,3-d]pyrimidines have been prepared, designed with input from new crystal structures of 23 of these compounds complexed with PTR1, and evaluated in screens for enzyme inhibitory activity against PTR1 and in vitro antitrypanosomal activity. Eight compounds were sufficiently active in both screens to take forward to in vivo evaluation. Thus, although evidence for trypanocidal activity in a stage I disease model in mice was obtained, the compounds were too toxic to mice for further development.
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Affiliation(s)
- Abedawn
I. Khalaf
- WestCHEM
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Judith K. Huggan
- WestCHEM
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Colin J. Suckling
- WestCHEM
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom, (C.J.S.) E-mail: ; Tel.: +44 141 548 2271
| | - Colin
L. Gibson
- WestCHEM
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Kirsten Stewart
- WestCHEM
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
| | - Federica Giordani
- Wellcome
Trust Centre for Molecular Parasitology, Institute of Infection, Immunity
and Inflammation and Glasgow Polyomics, College of Medical, Veterinary
and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom
| | - Michael P. Barrett
- Wellcome
Trust Centre for Molecular Parasitology, Institute of Infection, Immunity
and Inflammation and Glasgow Polyomics, College of Medical, Veterinary
and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom,(M.P.B.) E-mail: ; Tel.: +44 141 330 6904
| | - Pui Ee Wong
- Wellcome
Trust Centre for Molecular Parasitology, Institute of Infection, Immunity
and Inflammation and Glasgow Polyomics, College of Medical, Veterinary
and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom
| | - Keri L. Barrack
- Division
of Biological Chemistry and Drug Discovery, College of Life Sciences, University of Dundee, Dundee, DD1 5EH, United
Kingdom
| | - William N. Hunter
- Division
of Biological Chemistry and Drug Discovery, College of Life Sciences, University of Dundee, Dundee, DD1 5EH, United
Kingdom,(W.N.H.) E-mail: ; Tel.: +44 1382 385745
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Mao Z, Xu Y, Yu M, Long Y, Wu H. Synthesis of Pyrrolo[2,3-d]pyrimidine Analogues: “Pyridine Ring” Analogues of Pemetrexed. HETEROCYCLES 2009. [DOI: 10.3987/com-09-11725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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