1
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Budiman YP, Putra MH, Ramadhan MR, Hannifah R, Luz C, Ghafara IZ, Rustaman R, Ernawati EE, Mayanti T, Groß A, Radius U, Marder TB. Pd-Catalyzed Oxidative C-H Arylation of (Poly)fluoroarenes with Aryl Pinacol Boronates and Experimental and Theoretical Studies of its Reaction Mechanism. Chem Asian J 2024; 19:e202400094. [PMID: 38412058 DOI: 10.1002/asia.202400094] [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: 01/28/2024] [Revised: 02/27/2024] [Accepted: 02/27/2024] [Indexed: 02/29/2024]
Abstract
We report the synergistic combination of Pd(OAc)2 and Ag2O for the oxidative C-H arylation of (poly)fluoroarenes with aryl pinacol boronates (Ar-Bpin) in DMF as the solvent. This procedure can be conducted easily in air, and without using additional ligands, to afford the fluorinated unsymmetrical biaryl products in up to 98 % yield. Experimental studies suggest that the formation of [PdL2(C6F5)2] in DMF as coordinating solvent does not take place under the reaction conditions as it is stable to reductive elimination and thus would deactivate the catalyst. Thus, the intermediate [Pd(DMF)2(ArF)(Ar)] must be formed selectively to give desired arylation products. DFT calculations predict a low barrier (5.87 kcal/mol) for the concerted metalation deprotonation (CMD) process between C6F5H and the Pd(II) species formed after transmetalation between the Pd(II)X2 complex and aryl-Bpin which forms a Pd-Arrich species. Thus a Pd(Arrich)(Arpoor) complex is generated selectively which undergoes reductive elimination to generate the unsymmetrical biaryl product.
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Affiliation(s)
- Yudha P Budiman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | | | - Muhammad R Ramadhan
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Raiza Hannifah
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Christian Luz
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ilham Z Ghafara
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Rustaman Rustaman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Engela E Ernawati
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Tri Mayanti
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Axel Groß
- Institute of Theoretical Chemistry, Ulm University, 89081, Ulm, Germany
- Helmholtz Institute Ulm (HIU), Electrochemical Energy Storage, 89069, Ulm, Germany
| | - Udo Radius
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Todd B Marder
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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2
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Roy B, Kuila P, Sarkar D. Visible Light Promoted Brominative Dearomatization of Biaryl Ynones to Spirocycles. J Org Chem 2023; 88:10925-10945. [PMID: 37459885 DOI: 10.1021/acs.joc.3c00941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Bromine induced spiro cyclization of biaryl ynones facilitated the synthesis of spiro[5,5]trienones suitable for extended functionality at the C(3') position. Herein, a step-economic photo-oxidative brominative carbannulation of biaryl ynones employing ammonium bromide and riboflavin tetraacetate (RFTA) has been developed. The reactivity between distal phenyl C-H activated ortho-annulation and dearomative ipso-annulation is well exemplified. The eminent features of the methodology include metal-free, external additive free, low-loading photocatalyst (0.1 mol %), and use of a simple precursor.
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Affiliation(s)
- Barnali Roy
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Puspendu Kuila
- Department of Chemistry, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Debayan Sarkar
- Organic Synthesis and Molecular Engineering Laboratory, Department of Chemistry, Indian Institute of Technology Indore, Indore, Madhya Pradesh 453552, India
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3
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Tse MH, Choy PY, Kwong FY. Facile Assembly of Modular-Type Phosphines for Tackling Modern Arylation Processes. Acc Chem Res 2022; 55:3688-3705. [PMID: 36472355 DOI: 10.1021/acs.accounts.2c00587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This Account presents an overview of a promising collection of phosphine ligands simply made from the modular Fischer indolization process and their applications in modern arylation processes. Using one easily accessible 2-arylindole scaffold, three major phosphino-moiety-positioned ligand series can be readily generated. We have attempted to explore challenging electrophilic and nucleophilic partners for the coupling reaction using the modular ligand tool. For the electrophilic partner study, CM-phos-type ligands, where the phosphino group is located at the 2-arene position of 2-arylindole, allow the successful cross-coupling of aryl mesylates. The CM-phos ligand forms a palladacycle before entering the cross-coupling catalytic cycle. For the nucleophilic partner investigation, the indole C3-positioned phosphines show the first accomplishment of Pd-catalyzed organotitanium nucleophile arylation. Indeed, the aryl-titanium nucleophile undergoes cross-coupling more efficiently than does the organoboron coupling partner in particular cases. Moreover, in the indole C3-positioned phosphine series, the -PPh2-containing ligands perform better in the highly sterically hindered cross-coupling of aryl chlorides than do ligands containing the -PCy2 moiety. The catalyst loading can even be reduced to 0.2 mol % Pd for tetra-ortho-substituted biaryl synthesis. This finding offers a new perspective on the next-generation design of phosphine ligands in which the sterically bulky and electron-rich -PR2 group (R = alkyl) may not be necessary for the cross-coupling of aryl chlorides. In general, we hypothesize that a good balance of steric and electronic properties for entertaining the oxidative addition and reductive elimination steps is crucial to the success of the reaction. For the steric factor, the highly sterically congested -PR2 group normally favors the reductive elimination, yet we conjecture that this sterically bulky group would serve as an obstacle for the incoming aryl halides. For the electronic factor, the electron rich -PR2 group is believed to support the oxidative cleavage of the C(Ar)-Cl bond by donating more electron density to the corresponding σ* orbital. Nevertheless, the high electron richness of the -PR2 group may disfavor the reductive elimination electronically. Overall, an appropriate balance of both electron density and steric bulkiness is suggested to allow the sterically hindered cross-coupling to proceed smoothly. We have found that the -PPh2-containing ligand is a good starting point for this investigation. The formation of aromatic carbon-carbon (C-C) and carbon-heteroatom (C-X) bonds from aryl chlorides was successfully realized using our proprietary phosphines.In addition to the indole-core-bearing ligand skeleton, we also explored the relevant imidazolyl and carbazolyl phosphines for their unique applications. Interestingly, the carbazolyl ligand, having more flexible C-N axial chirality, displays particular interchangeable Pd-N and Pd-arene coordination, which facilitates both oxidative addition and reductive elimination processes. Moreover, this C-N axially chiral ligand allows the successful asymmetric Suzuki-Miyaura coupling for attaining the most sterically hindered tetra-ortho-substituted biaryls with excellent enantioselectivity. The rationale behind these scientifically interesting findings is presented in detail.
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Affiliation(s)
- Man Ho Tse
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, China
| | - Pui Ying Choy
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, China
| | - Fuk Yee Kwong
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, China
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4
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Yee KY, Leung MP, Tse MH, Choy PY, Kwong FY. Palladium‐Catalyzed Direct C‐H Olefination of Polyfluoroarenes with Alkenyl Tosylates. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ka Yee Yee
- The Chinese University of Hong Kong Department of Chemistry HONG KONG
| | - Man Pan Leung
- The Chinese University of Hong Kong Department of Chemistry HONG KONG
| | - Man Ho Tse
- The Chinese University of Hong Kong Department of Chemistry HONG KONG
| | - Pui Ying Choy
- The Chinese University of Hong Kong Department of Chemistry HONG KONG
| | - Fuk Yee Kwong
- The Chinese University of Hong Kong Department of Chemistry G56, Science CentreThe Chinese University of Hong KongShatin, N.T. 852 Hong Kong HONG KONG
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5
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Ng SS, Chen Z, Yuen OY, So CM. An indole-amide-based phosphine ligand enabling a general palladium-catalyzed sterically hindered Suzuki-Miyaura cross-coupling reaction. Org Biomol Chem 2022; 20:1373-1378. [PMID: 35080549 DOI: 10.1039/d1ob02294f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel family of indole-amide-based phosphine ligands was designed and synthesized. The Pd/InAm-phos (L1) catalytic system exhibited excellent efficiency in the Suzuki-Miyaura cross-coupling of sterically hindered (hetero)aryl chlorides to synthesize tri-ortho-substituted biaryls. Excellent product yields were obtained in a short reaction time (e.g., 10 min), and a Pd catalyst loading down to 50 ppm was also achieved. The oxidative addition adduct of Pd-L1 with 2-chlorotoluene was also well-characterized by single-crystal X-ray crystallography and showed a κ2-P,O-coordination of L1 with palladium.
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Affiliation(s)
- Shan Shan Ng
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Zicong Chen
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - On Ying Yuen
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Chau Ming So
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. .,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, People's Republic of China
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6
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Moseev TD, Varaksin MV, Gorlov DA, Charushin VN, Chupakhin ON. Recent advances in the functionalization of polyfluoro(aza)aromatics via C-C coupling strategies. Org Biomol Chem 2021; 19:4429-4459. [PMID: 33908555 DOI: 10.1039/d1ob00472g] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyfluoro(aza)aromatic compounds are of interest in various fields of practical applications, such as medicinal and agrochemistry, materials science and advanced technologies. The C-C coupling reactions are known to be a promising synthetic tool to create challenging fluorinated molecules of diverse architectures. In this review, we have summarized the recent advances in the functionalization of polyfluoro(aza)aromatics via both transition metal-catalyzed and metal-free C-C coupling reactions for the period from 2006 to the beginning of 2021. Also, mechanistic features for chemical transformations of fluoroarene scaffolds and new opportunities for practical applications of the designed fluorinated molecules have been highlighted.
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Affiliation(s)
- Timofey D Moseev
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia.
| | - Mikhail V Varaksin
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia. and Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Str., 620990 Ekaterinburg, Russia.
| | - Denis A Gorlov
- Moscow State University, 1 Leninskie Gory, 119991 Moscow, Russia
| | - Valery N Charushin
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia. and Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Str., 620990 Ekaterinburg, Russia.
| | - Oleg N Chupakhin
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia. and Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Str., 620990 Ekaterinburg, Russia.
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7
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Choy PY, Yuen OY, Leung MP, Chow WK, Kwong FY. A Highly Efficient Monophosphine Ligand for Parts per Million Levels Pd-Catalyzed Suzuki-Miyaura Coupling of (Hetero)Aryl Chlorides. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000068] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Pui Ying Choy
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules; Shenzhen Research Institute; The Chinese University of Hong Kong; No. 10, Second Yuexing Road 518507 Shenzhen P. R. China
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; Shenzhen Research Institute; The Chinese University of Hong Kong; China
| | - On Ying Yuen
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules; Shenzhen Research Institute; The Chinese University of Hong Kong; No. 10, Second Yuexing Road 518507 Shenzhen P. R. China
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; Shenzhen Research Institute; The Chinese University of Hong Kong; China
| | - Man Pan Leung
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules; Shenzhen Research Institute; The Chinese University of Hong Kong; No. 10, Second Yuexing Road 518507 Shenzhen P. R. China
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; Shenzhen Research Institute; The Chinese University of Hong Kong; China
| | - Wing Kin Chow
- Shenzhen Research Institute; The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI); 518057 Shenzhen P. R. China
| | - Fuk Yee Kwong
- Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules; Shenzhen Research Institute; The Chinese University of Hong Kong; No. 10, Second Yuexing Road 518507 Shenzhen P. R. China
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; Shenzhen Research Institute; The Chinese University of Hong Kong; China
- Shenzhen Research Institute; The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI); 518057 Shenzhen P. R. China
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8
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Yuen OY, Chen X, Wu J, So CM. Palladium-Catalyzed Direct α-Arylation of Arylacetonitriles with Aryl Tosylates and Mesylates. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- On Ying Yuen
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Kowloon Hong Kong
| | - Xiangmeng Chen
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Kowloon Hong Kong
| | - Junyu Wu
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Kowloon Hong Kong
| | - Chau Ming So
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hung Hom Kowloon Hong Kong
- Shenzhen Research Institute; The Hong Kong Polytechnic University; Shenzhen People's Republic of China
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9
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Li S, Li WJ, Yang X, Sun R, Tang J, Zheng XL, Yuan ML, Li RX, Chen H, Fu HY. Selective direct C–H polyfluoroarylation of electron-deficient N-heterocyclic compounds. Org Chem Front 2020. [DOI: 10.1039/d0qo00923g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An efficient protocol of C2-selective direct C–H polyfluoroarylation of six-membered N-heterocyclic compounds with polyfluorobenzoic acid via corresponding N-methyl quaternary ammonium salts.
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10
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Eliseenko SS, Liu F. Switchable pyrrole-based hydrogen bonding motif in enantioselective trifunctional organocatalysis. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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11
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Ji H, Cai J, Gan N, Wang Z, Wu L, Li G, Yi T. Palladium-catalyzed borylation of aryl (pseudo)halides and its applications in biaryl synthesis. Chem Cent J 2018; 12:136. [PMID: 30564982 PMCID: PMC6768141 DOI: 10.1186/s13065-018-0510-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 12/03/2018] [Indexed: 12/26/2022] Open
Abstract
A facile and efficient palladium-catalyzed borylation of aryl (pseudo)halides at room temperature has been developed. Arylboronic esters were expeditiously assembled in good yields and with a broad substrate scope and good functional group compatibility. This approach has been successfully applied to the one-pot two-step borylation/Suzuki-Miyaura cross-coupling reaction, providing a concise access to biaryl compounds from readily available aryl halides. Furthermore, a parallel synthesis of biaryl analogs is accomplished at room temperature using the strategy, which enhances the practical usefulness of this method.
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Affiliation(s)
- Hong Ji
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436 People’s Republic of China
| | - Jianghong Cai
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436 People’s Republic of China
| | - Nana Gan
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436 People’s Republic of China
| | - Zhaohua Wang
- School of Basic Sciences, Guangzhou Medical University, Guangzhou, 511436 People’s Republic of China
| | - Liyang Wu
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436 People’s Republic of China
| | - Guorong Li
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436 People’s Republic of China
| | - Tao Yi
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, 999077 Hong Kong Special Administrative Region People’s Republic of China
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12
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Varaksin MV, Moseev TD, Charushin VN, Chupakhin ON. Direct C-Li/C-H coupling of pentafluorophenyl lithium with azines - An atom- and step-economical strategy for the synthesis of polyfluoroaryl azaaromatics. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.01.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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13
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Yuen OY, Leung MP, So CM, Sun RWY, Kwong FY. Palladium-Catalyzed Direct Arylation of Polyfluoroarenes for Accessing Tetra- ortho-Substituted Biaryls: Buchwald-type Ligand Having Complementary -PPh 2 Moiety Exhibits Better Efficiency. J Org Chem 2018; 83:9008-9017. [PMID: 29882668 DOI: 10.1021/acs.joc.8b01176] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first general examples of direct C-H arylation of electron-deficient polyfluoroarenes with challenging di- ortho-substituted aryl(heteroaryl) chlorides for tetra- ortho-substituted biaryl synthesis are reported. Key to success is the use of Buchwald-type biaryl phosphine ligand, notably with inexpensive -PPh2 moiety (instead of -PCy2 group). Pd(OAc)2 associated with ligand L9 exhibits even higher efficiency than the corresponding SPhos toward this reaction. A wide range of sterically hindered di- ortho-substituted chloroarenes bearing electron-donating or -withdrawing groups are found applicable. Excellent product yields are obtained under mild reaction conditions, and the catalyst loading down to 0.25 mol % of Pd can also be achieved.
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Affiliation(s)
- On Ying Yuen
- Department of Chemistry , The Chinese University of Hong Kong , Shatin, New Territories , Hong Kong.,Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom, Kowloon , Hong Kong
| | - Man Pan Leung
- Department of Chemistry , The Chinese University of Hong Kong , Shatin, New Territories , Hong Kong.,Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom, Kowloon , Hong Kong
| | - Chau Ming So
- Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom, Kowloon , Hong Kong
| | - Raymond Wai-Yin Sun
- Guangzhou Lee & Man Technology Company Limited , 8 Huanshi Avenue South , Nansha, Guangzhou , Guangdong Province , China
| | - Fuk Yee Kwong
- Department of Chemistry , The Chinese University of Hong Kong , Shatin, New Territories , Hong Kong.,Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom, Kowloon , Hong Kong
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14
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Fu WC, Wu Y, So CM, Wong SM, Lei A, Kwong FY. Catalytic Direct C2-Alkenylation of Oxazoles at Parts per Million Levels of Palladium/PhMezole-Phos Complex. Org Lett 2016; 18:5300-5303. [DOI: 10.1021/acs.orglett.6b02619] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wai Chung Fu
- State
Key Laboratory of Chirosciences and Department of Applied Biology
and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 852, Hong Kong
| | - Yong Wu
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P.R. China
| | - Chau Ming So
- State
Key Laboratory of Chirosciences and Department of Applied Biology
and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 852, Hong Kong
| | - Shun Man Wong
- State
Key Laboratory of Chirosciences and Department of Applied Biology
and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 852, Hong Kong
| | - Aiwen Lei
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, P.R. China
| | - Fuk Yee Kwong
- State
Key Laboratory of Chirosciences and Department of Applied Biology
and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 852, Hong Kong
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15
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Yuen OY, So CM, Man HW, Kwong FY. A General Palladium-Catalyzed Hiyama Cross-Coupling Reaction of Aryl and Heteroaryl Chlorides. Chemistry 2016; 22:6471-6. [PMID: 26998586 DOI: 10.1002/chem.201600420] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 11/06/2022]
Abstract
A general palladium-catalyzed Hiyama cross-coupling reaction of aryl and heteroaryl chlorides with aryl and heteroaryl trialkoxysilanes by a Pd(OAc)2 /L2 catalytic system is presented. A newly developed water addition protocol can dramatically improve the product yields. The conjugation of the Pd/L2 system and the water addition protocol can efficiently catalyze a broad range of electron-rich, -neutral, -deficient, and sterically hindered aryl chlorides and heteroaryl chlorides with excellent yields within three hours and the catalyst loading can be down to 0.05 mol % Pd for the first time. Hiyama coupling of heteroaryl chlorides with heteroaryl silanes is also reported for the first time. The reaction can be easily scaled up 200 times (100 mmol) without any degasification and purification of reactants; this facilitates the practical application in routine synthesis.
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Affiliation(s)
- On Ying Yuen
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China.,The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI), Shenzhen, P. R. of China
| | - Chau Ming So
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China. .,The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI), Shenzhen, P. R. of China.
| | - Ho Wing Man
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China
| | - Fuk Yee Kwong
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. of China. .,The Hong Kong Polytechnic University Shenzhen Research Institute (SZRI), Shenzhen, P. R. of China.
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16
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Laidaoui N, He M, El Abed D, Soulé JF, Doucet H. Reactivity of (poly)fluorobenzamides in palladium-catalysed direct arylations. RSC Adv 2016. [DOI: 10.1039/c6ra12165a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Under PdCl2/PivOK as reaction conditions, fluoro substituents act as better directing groups than amides in the palladium-catalysed direct arylations.
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Affiliation(s)
- Nouria Laidaoui
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- CNRS-Université de Rennes 1
- “Organométalliques: Matériaux et Catalyse”
- Campus de Beaulieu
| | - Mian He
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- CNRS-Université de Rennes 1
- “Organométalliques: Matériaux et Catalyse”
- Campus de Beaulieu
| | - Douniazad El Abed
- Laboratoire de Chimie Fine
- Département de Chimie, Faculté des Sciences Exactes et Appliquées
- Université d'Oran 1 Ahmed BenBella
- Oran 31100
- Algeria
| | - Jean-François Soulé
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- CNRS-Université de Rennes 1
- “Organométalliques: Matériaux et Catalyse”
- Campus de Beaulieu
| | - Henri Doucet
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- CNRS-Université de Rennes 1
- “Organométalliques: Matériaux et Catalyse”
- Campus de Beaulieu
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17
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Yang Q, Choy PY, Fu WC, Fan B, Kwong FY. Copper-Catalyzed Oxidative C-H Amination of Tetrahydrofuran with Indole/Carbazole Derivatives. J Org Chem 2015; 80:11193-9. [PMID: 26485515 DOI: 10.1021/acs.joc.5b01990] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple α-C-H amination of cyclic ether with indole/carbazole derivatives has been accomplished by employing copper(II) chloride/bipy as the catalyst system. In the presence of the di-tert-butyl peroxide oxidant, cyclic ethers such as tetrahydrofuran, 1,4-dioxane, and tetrahydropyran successfully undergo C-H/N-H cross dehydrogenative coupling (CDC) with various carbazole or indole derivatives in good-to-excellent yields.
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Affiliation(s)
- Qingjing Yang
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
| | - Pui Ying Choy
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
| | - Wai Chung Fu
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
| | - Baomin Fan
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University , Kunming 650500, People's Republic of China
| | - Fuk Yee Kwong
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
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18
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Fu WC, So CM, Chow WK, Yuen OY, Kwong FY. Design of an Indolylphosphine Ligand for Reductive Elimination-Demanding Monoarylation of Acetone Using Aryl Chlorides. Org Lett 2015; 17:4612-5. [DOI: 10.1021/acs.orglett.5b02344] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wai Chung Fu
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Chau Ming So
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wing Kin Chow
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - On Ying Yuen
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Fuk Yee Kwong
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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