1
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Aravindan N, Vinayagam V, Jeganmohan M. A Ruthenium-Catalyzed Cyclization to Dihydrobenzo[ c]phenanthridinone from 7-Azabenzonorbornadienes with Aryl Amides. Org Lett 2022; 24:5260-5265. [PMID: 35838244 DOI: 10.1021/acs.orglett.2c01734] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An efficient ruthenium(II)-catalyzed tandem C-C/C-N bond formation with aryl amides and 7-azabenzonorbornadienes has been developed to synthesize cis-fused dihydrobenzo[c]phenanthridinones. The amide group functions as a directing group as well as a leaving group and provides an easy access to the pharmaceutically useful benzo[c]phenanthridine alkaloids such as nitidine and fagaronine analogues. The present methodology is compatible with various functional groups with respect to azabicyclic alkenes and aromatic amides. The reaction mechanism involving directing-group-assisted C-H activation was proposed and supported by the deuterium labeling studies.
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Affiliation(s)
- Narasingan Aravindan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Varathan Vinayagam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Masilamani Jeganmohan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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2
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Tóth BL, Monory A, Egyed O, Domján A, Bényei A, Szathury B, Novák Z, Stirling A. The ortho effect in directed C-H activation. Chem Sci 2021; 12:5152-5163. [PMID: 34163752 PMCID: PMC8179598 DOI: 10.1039/d1sc00642h] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 02/20/2021] [Indexed: 12/12/2022] Open
Abstract
The success of transition metal-catalysed ortho-directed C-H activation is often plagued by the effects of undesirable interactions between the directing group (DG) and other groups introduced into the aromatic core of the substrate. In particular, when these groups are in neighbouring positions, their interactions can affect profoundly the efficacy of the C-H activation by transition metals. In this work we introduce a simple substrate-only-based model to interpret the influence of steric hindrance of a group in ortho position to the DG in directed ortho-C-H bond activation reactions, and coined the term Ortho Effect (OE) for such situations. We consider simple descriptors such as torsion angle and torsional energy to predict and explain the reactivity of a given substrate in directed C-H activation reactions. More than 250 examples have been invoked for the model, and the nature of the ortho effect was demonstrated on a wide variety of structures. In order to guide organic chemists, we set structural and energetic criteria to evaluate a priori the efficiency of the metalation step which is usually the rate-determining event in C-H activations, i.e. we provide a simple and general protocol to estimate the reactivity of a potential substrate in C-H activation. For borderline cases these criteria help set the minimum reaction temperature to obtain reasonable reaction rates. As an example for the practical applicability of the model, we performed synthetic validations via palladium-catalysed 2,2,2-trifluoroethylation reactions in our lab. Furthermore, we give predictions for the necessary reaction conditions for several selected DGs.
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Affiliation(s)
- Balázs L Tóth
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Faculty of Science, Institute of Chemistry, Eötvös Loránd University Pázmány Péter Sétány. 1/A H-1117 Budapest Hungary
| | - Anna Monory
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Faculty of Science, Institute of Chemistry, Eötvös Loránd University Pázmány Péter Sétány. 1/A H-1117 Budapest Hungary
| | - Orsolya Egyed
- Research Centre for Natural Sciences, Eötvös Loránd Research Network Magyar Tudósok Körútja 2 H-1117 Budapest Hungary
| | - Attila Domján
- Research Centre for Natural Sciences, Eötvös Loránd Research Network Magyar Tudósok Körútja 2 H-1117 Budapest Hungary
| | - Attila Bényei
- Department of Physical Chemistry, University of Debrecen Egyetem Tér 1 H-4032 Debrecen Hungary
| | - Bálint Szathury
- Department of Chemistry, University of Cambridge Lensfield Rd Cambridge CB2 1EW UK
| | - Zoltán Novák
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Faculty of Science, Institute of Chemistry, Eötvös Loránd University Pázmány Péter Sétány. 1/A H-1117 Budapest Hungary
| | - András Stirling
- Research Centre for Natural Sciences, Eötvös Loránd Research Network Magyar Tudósok Körútja 2 H-1117 Budapest Hungary
- Department of Chemistry, Eszterházy Károly University Leányka u. 6 H-3300 Eger Hungary
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3
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Garrec J, Cordier M, Frison G, Prévost S. Palladium-Catalyzed C8-Arylation of Naphthalenes through C-H Activation: A Combined Experimental and Computational Study. Chemistry 2019; 25:14441-14446. [PMID: 31478579 DOI: 10.1002/chem.201903500] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 01/06/2023]
Abstract
Herein, a direct C8-arylation reaction of 1-amidonaphthalenes is described. By using diaryliodonium salts as arylating agents, the palladium-catalyzed C-H activation reaction showed perfect C8 regioselectivity and a wide functional group tolerance. In most cases, the desired polyaromatic compounds were isolated in good to excellent yields. To explain the observed regioselectivity, DFT calculations were performed and highlighted the crucial role of the amide directing group. Finally, the utility of this method is showcased by the synthesis of benzanthrone derivatives.
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Affiliation(s)
- Julian Garrec
- Unité Chimie et Procédés, ENSTA, Institut Polytechnique de Paris, 91128, Palaiseau, France
| | - Marie Cordier
- Laboratoire de Chimie Moléculaire, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, 91128, Palaiseau, France.,Present address: Institut des Sciences Chimiques de Rennes, Université de Rennes, Campus de Baulieu, 35042, Rennes Cedex, France
| | - Gilles Frison
- Laboratoire de Chimie Moléculaire, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, 91128, Palaiseau, France
| | - Sébastien Prévost
- Laboratoire de Synthèse Organique, Ecole Polytechnique, ENSTA, CNRS, Institut Polytechnique de Paris, 91128, Palaiseau, France
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4
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Elhadi Benhalouche M, Huang HY, Miloudi A, Doucet H, Soulé JF. Reactivity of N-methyl-N-(polyfluorobenzyl)acetamides and N-methyl-N-(polyfluorobenzyl)benzamides in Pd-catalyzed C–H bond arylation. CR CHIM 2019. [DOI: 10.1016/j.crci.2019.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Kalepu J, Pilarski LT. Weinreb Amides as Directing Groups for Transition Metal-Catalyzed C-H Functionalizations. Molecules 2019; 24:E830. [PMID: 30813564 PMCID: PMC6429370 DOI: 10.3390/molecules24050830] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 11/17/2022] Open
Abstract
Weinreb amides are a privileged, multi-functional group with well-established utility in classical synthesis. Recently, several studies have demonstrated the use of Weinreb amides as interesting substrates in transition metal-catalyzed C-H functionalization reactions. Herein, we review this part of the literature, including the metal catalysts, transformations explored so far and specific insights from mechanistic studies.
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Affiliation(s)
- Jagadeesh Kalepu
- Department of Chemistry-BMC, Uppsala University, BOX 576, 75-123 Uppsala, Sweden.
| | - Lukasz T Pilarski
- Department of Chemistry-BMC, Uppsala University, BOX 576, 75-123 Uppsala, Sweden.
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6
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Park H, Chekshin N, Shen PX, Yu JQ. Ligand-Enabled, Palladium-Catalyzed β-C(sp 3)-H Arylation of Weinreb Amides. ACS Catal 2018; 8:9292-9297. [PMID: 31223513 DOI: 10.1021/acscatal.8b03014] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the development of Pd(II)-catalyzed C(sp3)-H arylation of Weinreb amides. This work demonstrates the first example of using Weinreb amide as a directing group for transition metal-catalyzed C(sp3)-H activation. Both the inductive effect and the potential bidentate coordination mode of the Weinreb amides pose a unique challenge for this reaction development. A pyridinesulfonic acid ligand is designed to accommodate the weak, neutral coordinating property of Weinreb amides via preserving the cationic character of Pd center through zwitterionic assembly of Pd/ligand complexes. DFT studies of the C-H cleavage step indicate that the superior reactivity of 3-pyridinesulfonic acid ligand compared to pyridine, Ac-Gly-OH, and ligandless conditions originates from the stabilization of overall substrate-bound Pd species.
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Affiliation(s)
- Hojoon Park
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Nikita Chekshin
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Peng-Xiang Shen
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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7
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Kawai K, Bunno Y, Yoshino T, Matsunaga S. Weinreb Amide Directed Versatile C-H Bond Functionalization under (η 5 -Pentamethylcyclopentadienyl)cobalt(III) Catalysis. Chemistry 2018; 24:10231-10237. [PMID: 29732683 DOI: 10.1002/chem.201801750] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Indexed: 01/24/2023]
Abstract
The (η5 -pentamethylcyclopentadienyl)cobalt(III) (Cp*CoIII )-catalyzed C-H bond functionalization of aromatic, heteroaromatic, and α,β-unsaturated Weinreb amides was explored. C-H allylation reactions with the use of allyl carbonate and a perfluoroalkene, oxidative alkenylation reactions with the use of ethyl acrylate, iodination reactions with the use of N-iodosuccinimide, and amidation reactions with the use of dioxazolones were catalyzed by Cp*Co(CO)I2 in the presence of a cationic Ag salt and AgOAc to afford various synthetically useful building blocks. Mechanistic studies of the C-H allylation disclosed that the C-H activation step was rate determining and virtually irreversible.
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Affiliation(s)
- Kentaro Kawai
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| | - Youka Bunno
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
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8
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Jaiswal Y, Kumar Y, Kumar A. Palladium-Catalyzed Regioselective C-H Alkenylation of Arylacetamides via Distal Weakly Coordinating Primary Amides as Directing Groups. J Org Chem 2018; 83:1223-1231. [PMID: 29276827 DOI: 10.1021/acs.joc.7b02618] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we disclose the efficient Pd(II)-catalyzed and regioselective ortho C-H alkenylation of arylacetamide derivatives, viz. weakly coordinating aliphatic primary amides. This protocol utilizes ubiquitous free primary amides as the directing group and circumvents two troublesome steps of installation and removal of an external auxiliary. This strategy directly enables the incorporation of a synthetically versatile olefin in the products in moderate to good yields with regio- and distereoselectivity. The alkenylated acetamides can be easily manipulated and further transformed into a variety of useful derivatives.
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Affiliation(s)
- Yogesh Jaiswal
- Department of Chemistry, Indian Institute of Technology Patna , Bihta 801106, Bihar, India
| | - Yogesh Kumar
- Department of Chemistry, Indian Institute of Technology Patna , Bihta 801106, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna , Bihta 801106, Bihar, India
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9
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Das R, Kumar GS, Kapur M. Amides as Weak Coordinating Groups in Proximal C-H Bond Activation. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700546] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Riki Das
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462066 Bhopal MP India
| | - Gangam Srikanth Kumar
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462066 Bhopal MP India
| | - Manmohan Kapur
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462066 Bhopal MP India
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10
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Li F, Yu C, Zhang J, Zhong G. Weinreb amide directed cross-coupling reaction between electron-deficient alkenes catalyzed by a rhodium catalyst. Org Biomol Chem 2017; 15:1236-1244. [DOI: 10.1039/c7ob00026j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A rhodium-catalyzed Weinreb amide directed cross-coupling reaction between electron-deficient alkenes is reported, which provides an efficient route for the synthesis of valuable and versatile Weinreb amide functionalized (Z,E)-butadienes.
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Affiliation(s)
- Feifei Li
- College of Materials
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310036
- China
| | - Chunbing Yu
- College of Materials
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310036
- China
| | - Jian Zhang
- College of Materials
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310036
- China
| | - Guofu Zhong
- College of Materials
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310036
- China
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11
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Ping L, Chung DS, Bouffard J, Lee SG. Transition metal-catalyzed site- and regio-divergent C–H bond functionalization. Chem Soc Rev 2017; 46:4299-4328. [DOI: 10.1039/c7cs00064b] [Citation(s) in RCA: 354] [Impact Index Per Article: 50.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The regioselectivity of C–H functionalization reactions can be redirected to obtain regioisomeric products form the same starting materials.
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Affiliation(s)
- Lucy Ping
- Department of Chemistry and Nano Science (BK 21 Plus)
- Ewha Womans University
- 03760 Seoul
- Korea
| | - Da Sol Chung
- Department of Chemistry and Nano Science (BK 21 Plus)
- Ewha Womans University
- 03760 Seoul
- Korea
| | - Jean Bouffard
- Department of Chemistry and Nano Science (BK 21 Plus)
- Ewha Womans University
- 03760 Seoul
- Korea
| | - Sang-gi Lee
- Department of Chemistry and Nano Science (BK 21 Plus)
- Ewha Womans University
- 03760 Seoul
- Korea
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12
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Clarke AK, Liddon JTR, Cuthbertson JD, Taylor RJK, Unsworth WP. Dearomatisation approaches to spirocyclic dienones via the electrophilic activation of alkynes. Org Biomol Chem 2017; 15:233-245. [DOI: 10.1039/c6ob02426b] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Two simple metal-mediated dearomatising spirocyclisation protocols to generate spirocyclic dienones from anisole and phenol-tethered ynones in high yields are described.
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13
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Jaiswal Y, Kumar Y, Thakur R, Pal J, Subramanian R, Kumar A. Primary Amide Directed Regioselective ortho-C–H-Arylation of (Aryl)Acetamides. J Org Chem 2016; 81:12499-12505. [DOI: 10.1021/acs.joc.6b02353] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yogesh Jaiswal
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Yogesh Kumar
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Rima Thakur
- Department
of Chemistry, National Institute of Technology Patna, Patna 800005, Bihar, India
| | - Jagannath Pal
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Ranga Subramanian
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Amit Kumar
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
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14
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Frutos-Pedreño R, García-López JA. 2-Arylacetamides as Versatile Precursors for 3-Aminoisocoumarin and Homophthalimide Derivatives: Palladium-Catalyzed Cascade Double Carbonylation Reactions. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600224] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Roberto Frutos-Pedreño
- Grupo de Química Organometálica. Dpto. Química Inorgánica; Universidad de Murcia; Campus de Espinardo 30100 Murcia Spain
| | - José-Antonio García-López
- Grupo de Química Organometálica. Dpto. Química Inorgánica; Universidad de Murcia; Campus de Espinardo 30100 Murcia Spain
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15
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Yedage SL, Bhanage BM. Palladium-Catalyzed Deaminative Phenanthridinone Synthesis from Aniline via C–H Bond Activation. J Org Chem 2016; 81:4103-11. [DOI: 10.1021/acs.joc.6b00378] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Subhash L. Yedage
- Department of Chemistry, Institute of Chemical Technology, Mumbai 400 019, India
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16
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Bunno Y, Murakami N, Suzuki Y, Kanai M, Yoshino T, Matsunaga S. Cp*CoIII-Catalyzed Dehydrative C–H Allylation of 6-Arylpurines and Aromatic Amides Using Allyl Alcohols in Fluorinated Alcohols. Org Lett 2016; 18:2216-9. [DOI: 10.1021/acs.orglett.6b00846] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Youka Bunno
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Nanami Murakami
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Yudai Suzuki
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Motomu Kanai
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuhiko Yoshino
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- ACT-C, Japan Science
and Technology Agency, Sapporo 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- ACT-C, Japan Science
and Technology Agency, Sapporo 060-0812, Japan
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17
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Liu M, Niu Y, Wu YF, Ye XS. Ligand-Controlled Monoselective C-Aryl Glycoside Synthesis via Palladium-Catalyzed C–H Functionalization of N-Quinolyl Benzamides with 1-Iodoglycals. Org Lett 2016; 18:1836-9. [DOI: 10.1021/acs.orglett.6b00566] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Minglong Liu
- State Key Laboratory of Natural
and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - Youhong Niu
- State Key Laboratory of Natural
and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - Yan-Fen Wu
- State Key Laboratory of Natural
and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - Xin-Shan Ye
- State Key Laboratory of Natural
and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
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18
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Wang PL, Li Y, Ma L, Luo CG, Wang ZY, Lan Q, Wang XS. Palladium-Catalyzed C-7 Selective CH Carbonylation of Indolines for Expedient Synthesis of Pyrroloquinazolinediones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501070] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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19
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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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20
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Li G, Wan L, Zhang G, Leow D, Spangler J, Yu JQ. Pd(II)-catalyzed C-H functionalizations directed by distal weakly coordinating functional groups. J Am Chem Soc 2015; 137:4391-7. [PMID: 25768039 PMCID: PMC4431596 DOI: 10.1021/ja5126897] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Ortho-C(sp(2))-H olefination and acetoxylation of broadly useful synthetic building blocks phenylacetyl Weinreb amides, esters, and ketones are developed without installing an additional directing group. The interplay between the distal weak coordination and the ligand-acceleration is crucial for these reactions to proceed under mild conditions. The tolerance of longer distance between the target C-H bonds and the directing functional groups also allows for the functionalizations of more distal C-H bonds in hydrocinnamoyl ketones, Weinreb amides, and biphenyl Weinreb amides. Mechanistically, the coordination of these carbonyl groups and the bisdentate amino acid ligand with Pd(II) centers provides further evidence for our early hypothesis that the carbonyl groups of the potassium carboxylate are responsible for the directed C-H activation of carboxylic acids.
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Affiliation(s)
- Gang Li
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
| | - Li Wan
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
| | - Guofu Zhang
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
| | - Dasheng Leow
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
| | - Jillian Spangler
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
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