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Kang B, Ikeda K. 4-Dimethylaminopyridine (DMAP), A Superior Mediator for Morita-Balylis-Hillman Reaction-Triggered Annulative Condensation of Salicylaldehydes and Acrylonitrile to Form 3-Cyano-2H-chromenes. Chem Pharm Bull (Tokyo) 2023; 71:318-325. [PMID: 36805528 DOI: 10.1248/cpb.c23-00068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
We unveiled superior base mediators for the annulative condensation of salicylaldehydes and acrylonitrile to give 3-cyano-2H-chromenes, which has been mediated only by 1,4-diazabicyclo[2.2.2]octane (DABCO) over the past two decades. The reactions were most efficiently mediated by 4-dimethylaminopyridine (DMAP), which yielded 3-cyano-2H-chromenes in higher yields than DABCO in most cases. We also confirmed that the reaction remained high yielding in a decagram-scale experiment with a catalytic amount of DMAP. The utility of this reaction was also exemplified by derivatization of an obtained 3-cyano-2H-chromene into a known 2H-chromene-3-carboxylic acid, which was previously synthesized with a non-readily available reagent.
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Affiliation(s)
- Bubwoong Kang
- Graduate School of Agricultural Science, Kobe University
| | - Kaede Ikeda
- Graduate School of Agricultural Science, Kobe University
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Rueda-Zubiaurre A, Yahiya S, Fischer OJ, Hu X, Saunders CN, Sharma S, Straschil U, Shen J, Tate EW, Delves MJ, Baum J, Barnard A, Fuchter MJ. Structure-Activity Relationship Studies of a Novel Class of Transmission Blocking Antimalarials Targeting Male Gametes. J Med Chem 2019; 63:2240-2262. [PMID: 31490680 DOI: 10.1021/acs.jmedchem.9b00898] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Malaria is still a leading cause of mortality among children in the developing world, and despite the immense progress made in reducing the global burden, further efforts are needed if eradication is to be achieved. In this context, targeting transmission is widely recognized as a necessary intervention toward that goal. After carrying out a screen to discover new transmission-blocking agents, herein we report our medicinal chemistry efforts to study the potential of the most robust hit, DDD01035881, as a male-gamete targeted compound. We reveal key structural features for the activity of this series and identify analogues with greater potency and improved metabolic stability. We believe this study lays the groundwork for further development of this series as a transmission blocking agent.
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Affiliation(s)
- Ainoa Rueda-Zubiaurre
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Sabrina Yahiya
- Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Oliver J Fischer
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Xiaojun Hu
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Charlie N Saunders
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Sachi Sharma
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Ursula Straschil
- Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Junting Shen
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Edward W Tate
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Michael J Delves
- Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Jake Baum
- Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom
| | - Anna Barnard
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
| | - Matthew J Fuchter
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London W12 0BZ, United Kingdom
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Wang Q, Yang C, Jiang C. Visible-light-promoted radical acylation/cyclization of alkynoates with aldehydes for the synthesis of 3-acylcoumarins. Org Biomol Chem 2018; 16:8196-8204. [DOI: 10.1039/c8ob02232a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A new, efficient, and atom-economic visible-light-promoted radical acylation/cyclization of alkynoates with aldehydes was developed for the synthesis of 3-acylcoumarins.
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Affiliation(s)
- Qiumei Wang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Chao Yang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Chao Jiang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
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Sun H, Zhang Y, Guo F, Yan Y, Wan C, Zha Z, Wang Z. One-Pot Synthesis of 3,4-Disubstituted Coumarins under Catalysis of Mn3O4 Nanoparticles. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101578] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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