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Kunz S, Barnå F, Urrutia MP, Ingner FJL, Martínez-Topete A, Orthaber A, Gates PJ, Pilarski LT, Dyrager C. Derivatization of 2,1,3-Benzothiadiazole via Regioselective C-H Functionalization and Aryne Reactivity. J Org Chem 2024; 89:6138-6148. [PMID: 38648018 PMCID: PMC11077497 DOI: 10.1021/acs.joc.4c00122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/29/2024] [Accepted: 03/15/2024] [Indexed: 04/25/2024]
Abstract
Despite growing interest in 2,1,3-benzothiadiazole (BTD) as an integral component of many functional molecules, methods for the functionalization of its benzenoid ring have remained limited, and many even simply decorated BTDs have required de novo synthesis. We show that regioselective Ir-catalyzed C-H borylation allows access to versatile 5-boryl or 4,6-diboryl BTD building blocks, which undergo functionalization at the C4, C5, C6, and C7 positions. The optimization and regioselectivity of C-H borylation are discussed. A broad reaction scope is presented, encompassing ipso substitution at the C-B bond, the first examples of ortho-directed C-H functionalization of BTD, ring closing reactions to generate fused ring systems, as well as the generation and capture reactions of novel BTD-based heteroarynes. The regioselectivity of the latter is discussed with reference to the Aryne Distortion Model.
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Affiliation(s)
- Susanna Kunz
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
| | - Fredrik Barnå
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
| | | | | | | | - Andreas Orthaber
- Department
of Chemistry—Ångström, Uppsala University, Box 523, Uppsala 75120, Sweden
| | - Paul J. Gates
- School
of Chemistry, University of Bristol, Cantock’s Close, Clifton, Bristol BS8 1TS, U.K.
| | - Lukasz T. Pilarski
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
| | - Christine Dyrager
- Department
of Chemistry—BMC, Uppsala University, Box 576, Uppsala 75123, Sweden
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2
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Liu F, Sohail A, Ablajan K. Metal-Free Oxidative Formation of Aryl Esters by Catalytic Coupling of Acyl and Sulfonyl Chlorides with Arylboronic Acids. J Org Chem 2024; 89:27-33. [PMID: 38096383 DOI: 10.1021/acs.joc.3c01151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
A practical and efficient synthesis of aryl esters was developed through metal-free oxidation. This reaction employs stable and readily available acyl or sulfonyl chlorides and arylboronic acids as the starting materials and proceeds under mild reaction conditions without additional precious metal catalysts. This new strategy exhibits broad substrate tolerance and operational simplicity and gives diverse aryl esters in moderate to high yields.
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Affiliation(s)
- Fang Liu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, P. R. China
| | - Akbar Sohail
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, P. R. China
| | - Keyume Ablajan
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, P. R. China
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3
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Zhang P, Jiang Z, Fan Z, Li G, Ma Q, Huang J, Tang J, Xu X, Yu JQ, Jin Z. Macrocyclization via remote meta-selective C-H olefination using a practical indolyl template. Chem Sci 2023; 14:8279-8287. [PMID: 37564415 PMCID: PMC10411616 DOI: 10.1039/d3sc01670f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/03/2023] [Indexed: 08/12/2023] Open
Abstract
The synthesis of macrocyclic compounds with different sizes and linkages remains a great challenge via transition metal-catalysed intramolecular C-H activation. Herein, we disclose an efficient macrocyclization strategy via Pd-catalysed remote meta-C-H olefination using a practical indolyl template. This approach was successfully employed to access macrolides and coumarins. In addition, the intermolecular meta-C-H olefination also worked well and was exemplified by the synthesis of antitumor drug belinostat from inexpensive and readily available benzenesulfonyl chloride. Notably, catalytic copper acetate and molecular oxygen were used in place of silver salts as oxidants. Furthermore, for the first time, the formation of a macrocyclophane cyclopalladated intermediate was detected through in situ Fourier-transform infrared monitoring experiments and ESI-MS.
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Affiliation(s)
- Pengfei Zhang
- College of Chemistry, State Key Laboratory of Elemento-organic Chemistry, Nankai University Tianjin 300071 China
| | - Zhiwei Jiang
- College of Chemistry, State Key Laboratory of Elemento-organic Chemistry, Nankai University Tianjin 300071 China
| | - Zhoulong Fan
- Department of Chemistry, The Scripps Research Institute La Jolla CA 92037 United States
| | - Guoshuai Li
- College of Chemistry, State Key Laboratory of Elemento-organic Chemistry, Nankai University Tianjin 300071 China
| | - Qingxue Ma
- College of Chemistry, State Key Laboratory of Elemento-organic Chemistry, Nankai University Tianjin 300071 China
| | - Jun Huang
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University Kashgar 844007 China
| | - Jinghong Tang
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University Kashgar 844007 China
| | - Xiaohua Xu
- College of Chemistry, State Key Laboratory of Elemento-organic Chemistry, Nankai University Tianjin 300071 China
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute La Jolla CA 92037 United States
| | - Zhong Jin
- College of Chemistry, State Key Laboratory of Elemento-organic Chemistry, Nankai University Tianjin 300071 China
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University Kashgar 844007 China
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4
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Bang J, Gi S, Lee Y, Tan KL, Lee S. Meta-Selective C-H Functionalization of Arylsilanes Using a Silicon Tethered Directing Group. Org Lett 2022; 24:5181-5185. [PMID: 35822845 DOI: 10.1021/acs.orglett.2c02015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe meta-selective C-H functionalization of arylsilanes using a Si-tethered directing group. The current method enables a selective alkenylation of arenes bearing a variety of functional groups, and several electron-deficient olefins are also applicable as coupling partners. Further functional group transformations of the silicon-tethered directing group provide multisubstituted arenes efficiently.
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Affiliation(s)
- Jaehan Bang
- Department of Physics and Chemistry, DGIST, 333 Techno Jungang-daero, Dalseong-gun, Daegu 42988, Republic of Korea
| | - Seyun Gi
- School of Undergraduate Studies, DGIST, 333 Techno Jungang-daero, Dalseong-gun, Daegu 42988, Republic of Korea
| | - Yoonjung Lee
- School of Undergraduate Studies, DGIST, 333 Techno Jungang-daero, Dalseong-gun, Daegu 42988, Republic of Korea
| | - Kian L Tan
- Global Discovery Chemistry-SynTech Group, Novartis Institutes for Biomedical Research, Cambridge, Massachusetts 02139, United States
| | - Sunggi Lee
- Department of Physics and Chemistry, DGIST, 333 Techno Jungang-daero, Dalseong-gun, Daegu 42988, Republic of Korea.,Center for Basic Science, DGIST, 333 Techno Jungang-daero, Dalseong-gun, Daegu 42988, Republic of Korea
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5
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Sinha SK, Guin S, Maiti S, Biswas JP, Porey S, Maiti D. Toolbox for Distal C-H Bond Functionalizations in Organic Molecules. Chem Rev 2021; 122:5682-5841. [PMID: 34662117 DOI: 10.1021/acs.chemrev.1c00220] [Citation(s) in RCA: 166] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Transition metal catalyzed C-H activation has developed a contemporary approach to the omnipresent area of retrosynthetic disconnection. Scientific researchers have been tempted to take the help of this methodology to plan their synthetic discourses. This paradigm shift has helped in the development of industrial units as well, making the synthesis of natural products and pharmaceutical drugs step-economical. In the vast zone of C-H bond activation, the functionalization of proximal C-H bonds has gained utmost popularity. Unlike the activation of proximal C-H bonds, the distal C-H functionalization is more strenuous and requires distinctly specialized techniques. In this review, we have compiled various methods adopted to functionalize distal C-H bonds, mechanistic insights within each of these procedures, and the scope of the methodology. With this review, we give a complete overview of the expeditious progress the distal C-H activation has made in the field of synthetic organic chemistry while also highlighting its pitfalls, thus leaving the field open for further synthetic modifications.
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Affiliation(s)
- Soumya Kumar Sinha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Srimanta Guin
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sudip Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Jyoti Prasad Biswas
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sandip Porey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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6
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Li G, Yan Y, Zhang P, Xu X, Jin Z. Palladium-Catalyzed meta-Selective C–H Functionalization by Noncovalent H-Bonding Interaction. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02974] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Guoshuai Li
- State Key Laboratory of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yifei Yan
- State Key Laboratory of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Pengfei Zhang
- State Key Laboratory of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaohua Xu
- State Key Laboratory of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhong Jin
- State Key Laboratory of Elementoorganic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Enviromental Science, Kashi University, Kashgar 844007, China
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7
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MIDA-directed meta-selective C−H functionalizations. TRENDS IN CHEMISTRY 2021. [DOI: 10.1016/j.trechm.2021.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Zhao J, Chen J, Xu Q, Li H. Synthesis of Benzoxaboroles by ortho-Oxalkylation of Arylboronic Acids with Aldehydes/Ketones in the Presence of Brønsted Acids. Org Lett 2021; 23:1986-1990. [PMID: 33646001 DOI: 10.1021/acs.orglett.1c00032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we describe a simple and efficient synthesis of benzoxaboroles from arylboronic acids and aldehydes or ketones in the presence of a Brønsted acid. This method greatly simplifies the starting materials and reduces the number of reaction steps. The reaction can also be accomplished with acetals and ketals. The reaction has a wide substrate scope and high practicability.
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Affiliation(s)
- Jing Zhao
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Jiuxi Chen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Qing Xu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Huan Li
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
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9
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Ali W, Prakash G, Maiti D. Recent development in transition metal-catalysed C-H olefination. Chem Sci 2021; 12:2735-2759. [PMID: 34164039 PMCID: PMC8179420 DOI: 10.1039/d0sc05555g] [Citation(s) in RCA: 103] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 12/28/2020] [Indexed: 01/10/2023] Open
Abstract
Transition metal-catalysed functionalizations of inert C-H bonds to construct C-C bonds represent an ideal route in the synthesis of valuable organic molecules. Fine tuning of directing groups, catalysts and ligands has played a crucial role in selective C-H bond (sp2 or sp3) activation. Recent developments in these areas have assured a high level of regioselectivity in C-H olefination reactions. In this review, we have summarized the recent progress in the oxidative olefination of sp2 and sp3 C-H bonds with special emphasis on distal, atroposelective, non-directed sp2 and directed sp3 C-H olefination. The scope, limitation, and mechanism of various transition metal-catalysed olefination reactions have been described briefly.
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Affiliation(s)
- Wajid Ali
- Department of Chemistry, Indian Institute of Technology Bombay Powai Mumbai Maharashtra-400076 India
| | - Gaurav Prakash
- Department of Chemistry, Indian Institute of Technology Bombay Powai Mumbai Maharashtra-400076 India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay Powai Mumbai Maharashtra-400076 India
- Tokyo Tech World Research Hub Initiative (WRHI), Laboratory for Chemistry and Life Science, Tokyo Institute of Technology Tokyo 152-8550 Japan
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10
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Spencer ARA, Korde R, Font M, Larrosa I. meta-Selective olefination of fluoroarenes with alkynes using CO 2 as a traceless directing group. Chem Sci 2020; 11:4204-4208. [PMID: 34122883 PMCID: PMC8152615 DOI: 10.1039/d0sc01138j] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 03/31/2020] [Indexed: 11/28/2022] Open
Abstract
Over the last few decades C-H olefination has received significant interest, due to the importance and usefulness of aryl olefins both as synthetic targets and intermediates. While a wide range of ortho-olefination protocols have been developed, only a small number of meta-olefinations are currently available. Importantly, the most common approach to meta-olefination, using a large meta-directing template, is not suitable for substrates such as fluorobenzenes, which cannot be derivatised. We report that the meta-selective olefination of fluoroarenes can be achieved via the use of CO2 as a traceless directing group, which can be easily installed and removed in a one-pot process. Furthermore, this approach avoids the use of stoichiometric Ag(i)-salts, commonly used in C-H olefinations, and affords complete meta- over ortho/para-regioselectivity.
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Affiliation(s)
- Andrew R A Spencer
- School of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK
| | - Rishi Korde
- School of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK
| | - Marc Font
- School of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK
| | - Igor Larrosa
- School of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK
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