1
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Zhao H, Gu Y, Shen Q. [(SIPr)Ag(CF 2 H)]: A Shelf-Stable, Versatile Difluoromethylation Reagent. CHEM REC 2023; 23:e202300124. [PMID: 37194962 DOI: 10.1002/tcr.202300124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 05/05/2023] [Indexed: 05/18/2023]
Abstract
Due to its unique physical and electrophilic properties, the difluoromethyl group (-CF2 H) has been playing an irreplaceable role in the field of pharmaceutical and agrochemical industry. Methods that could efficiently incorporate the difluoromethyl group into the target molecules are increasing in the recent years. Developing a stable and efficient difluoromethylating reagent is thus highly attractive. In this review, we describe the development of a nucleophilic difluoromethylation reagent [(SIPr)Ag(CF2 H)], including its elemental reaction, difluoromethylation reaction with different types of electrophiles, and its application in the synthesis of a nucleophilic and an electrophilic difluoromethylthiolating reagent.
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Affiliation(s)
- Haiwei Zhao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Yang Gu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Qilong Shen
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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2
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Amii H. Copper-Catalyzed Aromatic Trifluoromethylation and the Related Transformations. CHEM REC 2023; 23:e202300154. [PMID: 37489548 DOI: 10.1002/tcr.202300154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/29/2023] [Indexed: 07/26/2023]
Abstract
Trifluoromethylated aromatic compounds (Ar-CF3 ) are the substances of considerable interest in various industrial fields. The high lipophilicity, strong electron-withdrawing ability, and characteristic size of trifluoromethyl group are key influences in biologically active molecules. Due to these attractive properties, the benzotrifluoride structural motifs have been widely employed in the design of pharmaceuticals, agrochemicals, dyes, liquid crystals, and polymers. Therefore, the development of highly efficient methodologies for aromatic trifluoromethylation is of significant importance for wide fields of science and technology. Recently, a great deal of attention has been paid to catalytic protocols to introduce fluoroalkyl groups into aromatic rings selectively. This personal account highlights the copper-mediated aromatic trifluoromethylation and the related transformations developed by our research group.
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Affiliation(s)
- Hideki Amii
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
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3
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Ispizua-Rodriguez X, Krishnamurti V, Carpio V, Barrett C, Prakash GKS. Copper-Catalyzed Synthesis of Difluoromethyl Alkynes from Terminal and Silyl Acetylenes. J Org Chem 2023; 88:1194-1199. [PMID: 36622772 DOI: 10.1021/acs.joc.2c02799] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient method for the direct C(sp)-H difluoromethylation of terminal alkynes and the desilylation-difluoromethylation of (trimethylsilyl)acetylenes is disclosed. The copper-catalyzed transformation provides access to a wide range of structurally diverse CF2H alkynes in good yields, utilizing a (difluoromethyl)zinc reagent and an organic oxidant. The difluoromethylation of important synthons and API's is showcased. The synthetic utility of these (difluoromethyl)alkynes is demonstrated by selected cycloaddition reactions. Additionally, a slight modification to the reaction conditions allowed the selective preparation of a 2-difluoromethylindole.
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Affiliation(s)
- Xanath Ispizua-Rodriguez
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Vinayak Krishnamurti
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Vanessa Carpio
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - Colby Barrett
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - G K Surya Prakash
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
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4
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Monsigny L, Doche F, Besset T. Transition-metal-catalyzed C-H bond activation as a sustainable strategy for the synthesis of fluorinated molecules: an overview. Beilstein J Org Chem 2023; 19:448-473. [PMID: 37123090 PMCID: PMC10130906 DOI: 10.3762/bjoc.19.35] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 03/24/2023] [Indexed: 05/02/2023] Open
Abstract
The last decade has witnessed the emergence of innovative synthetic tools for the synthesis of fluorinated molecules. Among these approaches, the transition-metal-catalyzed functionalization of various scaffolds with a panel of fluorinated groups (XRF, X = S, Se, O) offered straightforward access to high value-added compounds. This review will highlight the main advances made in the field with the transition-metal-catalyzed functionalization of C(sp2) and C(sp3) centers with SCF3, SeCF3, or OCH2CF3 groups among others, by C-H bond activation. The scope and limitations of these transformations are discussed in this review.
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Affiliation(s)
- Louis Monsigny
- Normandie University, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Floriane Doche
- Normandie University, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Tatiana Besset
- Normandie University, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
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5
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Doche F, Escudero J, Petit‐Cancelier F, Xiong H, Couve‐Bonnaire S, Audisio D, Poisson T, Besset T. Directed Palladium Catalyzed C-H (Ethoxycarbonyl)difluoromethylthiolation Reactions. Chemistry 2022; 28:e202202099. [PMID: 35904010 PMCID: PMC9826264 DOI: 10.1002/chem.202202099] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Indexed: 01/11/2023]
Abstract
The unprecedented Pd-catalyzed (ethoxycarbonyl)difluoromethylthiolation reaction of various unsaturated derivatives was studied. In the presence of the (ethoxycarbonyl)difluoromethylsulfenamide reagent I and under mild reaction conditions (60 °C), both 2-(hetero)aryl and 2-(α-aryl-vinyl)pyridine derivatives were smoothly functionalized with this methodology (37 examples, up to 87 % yield). Moreover, the synthetic interest of this fluorinated moiety was further showcased by its conversion into various original fluorinated residues. Finally, a plausible mechanism for this transformation was suggested.
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Affiliation(s)
- Floriane Doche
- Normandie Univ.INSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance).
| | - Julien Escudero
- Normandie Univ.INSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance).
| | | | - Heng‐Ying Xiong
- Normandie Univ.INSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance).
| | | | - Davide Audisio
- CEADépartement Médicaments et Technologies pour la SantéSCBMUniversité Paris Saclay91191Gif-sur-YvetteFrance
| | - Thomas Poisson
- Normandie Univ.INSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance).,Institut Universitaire de France1 rue Descartes75231ParisFrance
| | - Tatiana Besset
- Normandie Univ.INSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance).
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6
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Vuagnat M, Tognetti V, Jubault P, Besset T. Ru(II)-Catalyzed Hydroarylation of in situ Generated 3,3,3-Trifluoro-1-propyne by C-H Bond Activation: A Facile and Practical Access to β-Trifluoromethylstyrenes. Chemistry 2022; 28:e202201928. [PMID: 35736795 PMCID: PMC9804422 DOI: 10.1002/chem.202201928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Indexed: 01/05/2023]
Abstract
In this study, a practical and straightforward synthesis of β-(E)-trifluoromethylstyrenes by ruthenium-catalyzed C-H bond activation was developed. The readily available and inexpensive 2-bromo-3,3,3-trifluoropropene (BTP), a non-ozone depleting reagent, was used as a reservoir of 3,3,3-trifluoropropyne. With this approach, the monofunctionalization of a panel of heteroarenes was possible in a safe and scalable manner (23 examples, up to 87 % yield). Mechanistic investigations and density functional theory (DFT) calculations were also conducted to get a better understanding of the mechanism of this transformation. These studies suggested that 1) a cyclometallated ruthenium complex enabled the transformation, 2) this complex exhibited high efficiency in this transformation compared to the commercially available [RuCl2 (p-cymene)]2 and 3) the mechanism proceeded through a bis-cyclometallated ruthenium intermediate for the carboruthenation step.
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Affiliation(s)
- Martin Vuagnat
- Normandie UnivINSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance
| | - Vincent Tognetti
- Normandie UnivINSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance
| | - Philippe Jubault
- Normandie UnivINSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance
| | - Tatiana Besset
- Normandie UnivINSA RouenUNIROUENCNRSCOBRA (UMR 6014)76000RouenFrance
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7
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Zhao H, Leng XB, Zhang W, Shen Q. [Ph
4
P]
+
[Cu(CF
2
H)
2
]
−
: A Powerful Difluoromethylating Reagent Inspired by Mechanistic Investigation. Angew Chem Int Ed Engl 2022; 61:e202210151. [DOI: 10.1002/anie.202210151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Haiwei Zhao
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry 345 Lingling Lu Shanghai 200032 China
| | - Xuebing B. Leng
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry 345 Lingling Lu Shanghai 200032 China
| | - Wei Zhang
- Centre for Green Chemistry and Department of Chemistry University of Massachusetts Boston 100 Morrissey Boulevard Boston Massachusetts 02125 USA
| | - Qilong Shen
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry 345 Lingling Lu Shanghai 200032 China
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8
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Zhao H, Leng X, Zhang W, Shen Q. [Ph4P]+[Cu(CF2H)2]‐: A Powerful Difluoromethylating Reagent Inspired by Mechanistic Investigation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Haiwei Zhao
- SIOC: Shanghai Institute of Organic Chemistry Key Laboratory of Organofluorine Chemistry 345 Lingling Lu 200032 Shanghai CHINA
| | - Xuebing Leng
- Shanghai Institute of Organic Chemistry Key Laboratory of Organofluorine Chemistry 345 Lingling Lu 200032 Shanghai CHINA
| | - Wei Zhang
- University of Massachusetts Boston Chemistry UNITED STATES
| | - Qilong Shen
- Shanghai Institute of Organic Chemistry Key Laboratory of Organofluorine Chemsitry 345 Lingling Road 200032 Shanghai CHINA
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9
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Nobile E, Hébert JP, Castanheiro T, Ledoux A, Besset T. Cost-Efficient, Multigram Scalable Synthesis of Shelf-Stable Electrophilic (Phenylsulfonyl)difluoromethylating Reagents. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Enzo Nobile
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France
| | - Jean-Pierre Hébert
- Normandie Univ, INSA Rouen, LSPC, Saint Etienne du Rouvray 76801, France
| | - Thomas Castanheiro
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France
| | - Alain Ledoux
- Normandie Univ, INSA Rouen, LSPC, Saint Etienne du Rouvray 76801, France
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France
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10
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Yamamoto Y, Suzuki H, Kuroyanagi E, Yamada K, Yasui T. Co-Catalyzed atom transfer radical addition of bromodifluoroacetamides, expanding the scope of radical difluoroalkylation. Org Biomol Chem 2022; 20:2867-2872. [PMID: 35302578 DOI: 10.1039/d2ob00437b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The atom transfer radical addition (ATRA) of bromodifluoroacetamides to arylalkynes and terminal alkenes was conducted using von Wangelin's Co catalyst system (CoBr2/1,2-bis(diphenylphosphino)benzene/Zn) in acetone/H2O at 30 °C to afford the corresponding functionalized difluoroacetamides in 33-89% yields. Moreover, the Co catalyst was successfully applied to the tandem addition/cyclization of 1,6-diene and -enyne substrates and intramolecular ATRA of N-allyl and N-propargyl bromodifluoroacetamides, significantly expanding the scope of radical difluoroalkylation.
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Affiliation(s)
- Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
| | - Harufumi Suzuki
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
| | - Eisuke Kuroyanagi
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
| | - Keiji Yamada
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
| | - Takeshi Yasui
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
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11
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Zhai SJ, Cahard D, Zhang FG, Ma JA. Metal-free regioselective construction of 2-aryl-2H-tetrazol-5-yl difluoromethylene phosphonates. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Nobile E, Castanheiro T, Besset T. C-H Electrophilic (phenylsulfonyl)difluoromethylation of (hetero)arenes with a newly designed reagent. Chem Commun (Camb) 2021; 57:12337-12340. [PMID: 34747423 PMCID: PMC8603193 DOI: 10.1039/d1cc04737j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 09/20/2021] [Indexed: 02/01/2023]
Abstract
The synthesis of an original electrophilic difluoromethylating reagent was successfully achieved upon a straightforward protocol (3 steps). Like a Swiss army knife, this bench-stable reagent allowed the functionalization of various classes of compounds under mild and transition metal-free conditions. Hence, an efficient and operationally simple tool for the construction of C(sp2)-, C(sp3)- and S-CF2SO2Ph bonds was provided, expanding the chemical space of PhSO2CF2-containing molecules. Late-stage functionalization of bioactive molecules and the synthesis of PhSO2CF2- and HCF2-analogs of Lidocaine were also successfully achieved.
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Affiliation(s)
- Enzo Nobile
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France.
| | - Thomas Castanheiro
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France.
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France.
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13
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Ruyet L, Lapuh MI, Koshti VS, Földesi T, Jubault P, Poisson T, Novák Z, Besset T. Z-Selective Pd-catalyzed 2,2,2-trifluoroethylation of acrylamides at room temperature. Chem Commun (Camb) 2021; 57:6241-6244. [PMID: 34079967 DOI: 10.1039/d1cc02007b] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A straightforward 2,2,2-trifluoroethylation of acrylamides by Pd-catalyzed C-H bond activation was reported by using a fluorinated hypervalent iodine reagent as a coupling partner. At room temperature, this additive-free approach allowed the synthesis of Z-2,2,2-trifluoroethylated acrylamides (19 examples, up to 73% yield) in a stereoselective manner. Under these mild reaction conditions, the methodology turned out to be functional group tolerant and mechanistic studies gave us a better understanding of the transformation.
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Affiliation(s)
- Louise Ruyet
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Maria I Lapuh
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Vijay S Koshti
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Tamás Földesi
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös Loránd University, Faculty of Science, Budapest H-1117, Hungary
| | - Philippe Jubault
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Thomas Poisson
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France. and Institut Universitaire de France, Paris 75231, France
| | - Zoltán Novák
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös Loránd University, Faculty of Science, Budapest H-1117, Hungary
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
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14
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Ruyet L, Poisson T, Besset T. Transition Metal‐Free Regioselective Remote C−H Bond 2,2,2‐Trifluoroethoxylation of 8‐Aminoquinoline Derivatives at the C5 Position. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Louise Ruyet
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014) 76000 Rouen France
| | - Thomas Poisson
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014) 76000 Rouen France
- Institut Universitaire de France 75231 Paris France
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014) 76000 Rouen France
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15
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Shevchuk M, Wang Q, Pajkert R, Xu J, Mei H, Röschenthaler G, Han J. Recent Advances in Synthesis of Difluoromethylene Phosphonates for Biological Applications. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001464] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Michael Shevchuk
- Department of Life Sciences and Chemistry Jacobs University Bremen gGmbH Campus Ring 1 28759 Bremen Germany
| | - Qian Wang
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Romana Pajkert
- Department of Life Sciences and Chemistry Jacobs University Bremen gGmbH Campus Ring 1 28759 Bremen Germany
| | - Jingcheng Xu
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Haibo Mei
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Gerd‐Volker Röschenthaler
- Department of Life Sciences and Chemistry Jacobs University Bremen gGmbH Campus Ring 1 28759 Bremen Germany
| | - Jianlin Han
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
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16
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Abstract
This review highlights important developments in nickel-catalysed mono-, di- and tri-fluoromethylation, trifluoromethylthiolation and trifluoromethylselenolation.
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Affiliation(s)
- Pravya P. Nair
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
| | - Rose Mary Philip
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
| | - Gopinathan Anilkumar
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
- Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
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17
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Yamamoto Y, Sakai M, Ishida Y, Yasui T. Synthesis of 1-(Difluoromethyl)alk-1-enes via Palladium-Catalyzed S N2'-Type Substitution Reaction of Difluoromethylated Allylic Phosphates with 1,3-Dicarbonyl Compounds and Imides. J Org Chem 2020; 86:1053-1064. [PMID: 33253567 DOI: 10.1021/acs.joc.0c02538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Herein, we report the synthesis of 1-(difluoromethyl)alkenes via a palladium-catalyzed reaction of difluoromethyl-substituted allylic phosphates with 1,3-dicarbonyl compounds using PdCl2(PPh3)2 as a precatalyst. 1,3-Dicarbonyl compounds attacked the γ-carbon with respect to the difluoromethyl group to afford their corresponding SN2'-type substitution products irrespective of the substitution pattern in the allylic phosphates. This regioselectivity has been ascribed to the electronic environment of the unsymmetrical π-allylpalladium intermediate using density functional theory (DFT) calculations. The reaction of difluoromethyl-substituted allylic phosphates with imides was also carried out using a different catalyst system composed of [PdCl(η3-allyl)]2 and di(diphenylphosphino)butane (dppb).
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Affiliation(s)
- Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Motoji Sakai
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Yuki Ishida
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Takeshi Yasui
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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18
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Engl S, Reiser O. Copper Makes the Difference: Visible Light-Mediated Atom Transfer Radical Addition Reactions of Iodoform with Olefins. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02984] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Sebastian Engl
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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