1
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Charlesworth NG, Arunprasath D, Graham MA, Argent SP, Datsenko OP, Mykhailiuk PK, Denton RM. Modular synthesis of cyclic β-difluoroamines. Chem Commun (Camb) 2024; 60:7701-7704. [PMID: 38896427 DOI: 10.1039/d4cc00640b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Fluorine-containing saturated nitrogen heterocycles are very attractive structures in medicinal and biological chemistry because fluorine can be used to tune conformation as well as key properties such as basicity and bioavailability. At present cyclic fluorinated amines are accessed using hazardous reagents such as DAST or by lengthy synthesis routes. Here we report a modular two-step synthesis of cyclic β-fluoroalkyl amines using a photoredox-catalysed cyclisation/hydrogen atom transfer reaction of bromodifluoroethylamines.
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Affiliation(s)
- Natalie G Charlesworth
- School of Chemistry, GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, 6 Triumph Road, Nottingham NG7 2GA, UK.
| | - Dhanarajan Arunprasath
- School of Chemistry, GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, 6 Triumph Road, Nottingham NG7 2GA, UK.
| | - Mark A Graham
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, UK
| | - Stephen P Argent
- School of Chemistry, GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, 6 Triumph Road, Nottingham NG7 2GA, UK.
| | | | - Pavel K Mykhailiuk
- Enamine Ltd, Winston Churchill Str. 78, 02094 Kyiv, Ukraine
- Chemistry Department, Taras Shevchenko National University of Kyiv, Volodymyrska 64, 01601 Kyiv, Ukraine
| | - Ross M Denton
- School of Chemistry, GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, 6 Triumph Road, Nottingham NG7 2GA, UK.
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2
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Thibeault O, Ouellet-Du Berger MR, Gonay M, Paquin JF. Room temperature deoxofluorination of aromatic aldehydes with XtalFluor-E under highly concentrated conditions. Org Biomol Chem 2023; 21:6115-6119. [PMID: 37462469 DOI: 10.1039/d3ob00859b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
The synthesis of difluoromethyl-containing compounds exploiting the deoxofluorination reaction of aromatic aldehydes using XtalFluor-E is described. This transformation occurs at room temperature under highly concentrated conditions, i.e., with no added solvent. A wide range of difluoromethyl-containing compounds was obtained in 21 to 87% isolated yields.
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Affiliation(s)
- Olivier Thibeault
- CCVC, PROTEO, Département Université Laval, 1045 Avenue de la Médecine, Québec, Québec, G1V 0A6, Canada.
| | | | - Marie Gonay
- CCVC, PROTEO, Département Université Laval, 1045 Avenue de la Médecine, Québec, Québec, G1V 0A6, Canada.
| | - Jean-François Paquin
- CCVC, PROTEO, Département Université Laval, 1045 Avenue de la Médecine, Québec, Québec, G1V 0A6, Canada.
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3
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Liu X, Wang Y, Xu T. Chemo- and Diastereoselective Acylfluorination of Nonactivated Olefins to Access Benzo[ b]azepines. Org Lett 2023; 25:726-731. [PMID: 36705940 DOI: 10.1021/acs.orglett.2c04082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Here, we describe a transition-metal-free condition that realized the intramolecular acylfluorination of unactivated olefins. It was designed to access seven-membered-ring-containing benzo[b]annulenones from readily prepared 2-allylamino benzoic acids. The formation of a broad scope of electronically and sterically varied benzo[b]annulenones was demonstrated (>30 examples, up to 88% yield and >20:1 dr ratio). Mechanistic studies indicated that the in situ formed XatlFluor-E-activated anhydride was the active species and induced an electrophilic 7-endo-trig cyclization, followed by fluoride capture of the cation.
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Affiliation(s)
- Xingfeng Liu
- Molecular Synthesis Center and Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266003, China
| | - Yuxi Wang
- Molecular Synthesis Center and Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266003, China
| | - Tao Xu
- Molecular Synthesis Center and Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao, Shandong 266003, China.,Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao, Shandong 266237, China
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4
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A Bromine-Terminated Triblock Copolymer (Br-PCL-PDMS-PCL-Br) as the Stationary Phase for Gas Chromatography Analysis. Chromatographia 2022. [DOI: 10.1007/s10337-022-04202-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Synthesis of mono-fluoromethyl 6,5-heteroaromatic bicycles using 1,3-difluoroacetone as a cyclising reagent. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Sheng C, Li Z, Pu M, Lei M. Theoretical study on the mechanism of the benzaldehyde deoxyfluorination by sulfuryl fluoride and tetramethylammonium fluoride. J PHYS ORG CHEM 2022. [DOI: 10.1002/poc.4389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chenxi Sheng
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry Beijing University of Chemical Technology Beijing China
| | - Zhewei Li
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry Beijing University of Chemical Technology Beijing China
| | - Min Pu
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry Beijing University of Chemical Technology Beijing China
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry Beijing University of Chemical Technology Beijing China
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7
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Shet H, Sahu R, Sanghvi YS, Kapdi AR. Strategies for the Synthesis of Fluorinated Nucleosides, Nucleotides and Oligonucleotides. CHEM REC 2022; 22:e202200066. [PMID: 35638251 DOI: 10.1002/tcr.202200066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/11/2022] [Indexed: 11/09/2022]
Abstract
Fluorinated nucleosides and oligonucleotides are of specific interest as probes for studying nucleic acids interaction, structures, biological transformations, and its biomedical applications. Among various modifications of oligonucleotides, fluorination of preformed nucleoside and/or nucleotides have recently gained attention owing to the unique properties of fluorine atoms imparting medicinal properties with respect to the small size, electronegativity, lipophilicity, and ability for stereochemical control. This review deals with synthetic protocols for selective fluorination either at sugar or base moiety in a preformed nucleosides, nucleotides and nucleic acids using specific fluorinating reagents.
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Affiliation(s)
- Harshita Shet
- Department of Chemistry, Institute of Chemical Technology -, Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, Mouza Samantpuri, Bhubaneswar, Odisha-751013, India.,Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai-400019, India
| | - Rajesh Sahu
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai-400019, India
| | - Yogesh S Sanghvi
- Rasayan Inc., 2802, Crystal Ridge, Encinitas, CA92024-6615, California, USA
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai-400019, India
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8
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Abstract
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Fluorinated
carbohydrates have found many applications in the glycosciences.
Typically, these contain fluorination at a single position. There
are not many applications involving polyfluorinated carbohydrates,
here defined as monosaccharides in which more than one carbon has
at least one fluorine substituent directly attached to it, with the
notable exception of their use as mechanism-based inhibitors. The
increasing attention to carbohydrate physical properties, especially
around lipophilicity, has resulted in a surge of interest for this
class of compounds. This review covers the considerable body of work
toward the synthesis of polyfluorinated hexoses, pentoses, ketosugars,
and aminosugars including sialic acids and nucleosides. An overview
of the current state of the art of their glycosidation is also provided.
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Affiliation(s)
- Kler Huonnic
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K.,Department of Organic and Macromolecular Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-S4, Ghent, 9000, Belgium
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Abstract
This review provides a short summary of the traditional methods for synthesis of CF3-O-containing compounds, followed by a critical overview of known trifluoromethoxylating reagents, focusing on their preparation, synthetic generality and limitations.
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Pirnot M, Stone K, Wright TJ, Lamberto DJ, Schoell J, Lam YH, Zawatzky K, Wang X, Dalby SM, Fine AJ, McMullen JP. Manufacturing Process Development for Belzutifan, Part 6: Ensuring Scalability for a Deoxyfluorination Reaction. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00239] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Pirnot
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Kevin Stone
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Timothy J. Wright
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - David J. Lamberto
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Jochen Schoell
- Process Research and Development, MSD Werthenstein BioPharma, Industrie Nord 1, CH-6105 Schachen, Switzerland
| | - Yu-hong Lam
- Computational and Structural Chemistry, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Kerstin Zawatzky
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Xiao Wang
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Stephen M. Dalby
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Adam J. Fine
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
| | - Jonathan P. McMullen
- Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey 07033, United States
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11
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Kaźmierczak M, Bilska‐Markowska M. Diethylaminosulfur Trifluoride (DAST) Mediated Transformations Leading to Valuable Building Blocks and Bioactive Compounds. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101027] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Marcin Kaźmierczak
- Faculty of Chemistry Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 8 61-614 Poznań Poland
- Centre for Advanced Technologies Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 10 61-614 Poznań Poland
| | - Monika Bilska‐Markowska
- Faculty of Chemistry Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 8 61-614 Poznań Poland
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12
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Abstract
AbstractAcyl fluorides are valuable intermediates in organic synthesis. They are increasingly employed in peptide synthesis, in challenging esterification and amidation reactions or in transition-metal-catalyzed transformations. This review summarizes recent advances in their preparation.1 Introduction2 Nucleophilic Fluorination2.1 α-Fluoroamine Reagents2.2 Sulfur-Based Reagents2.3 Metal Catalysts2.4 Phosphorus-Based Reagents2.5 N,N′-Dicyclohexylcarbodiimide/HF·Pyridine2.6 Uranium Hexafluoride2.7 Bromine Trifluoride3 Radical Fluorination4 Conclusion
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