1
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Chen C, Chen Y, Han Z, Huang Y, Wang Y, Tao X, Wang L, Chen X, Long R, Yang Y, Zhu W, Zhou B. Switchable Regioselective C-H Activation/Annulation of Acrylamides with Alkynes for the Synthesis of 2-Pyridones. CHEMSUSCHEM 2024:e202400066. [PMID: 38656829 DOI: 10.1002/cssc.202400066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 04/26/2024]
Abstract
A catalyst-based switchable regioselective C-H activation/annulation of acrylamides with propargyl carbonates has been developed, delivering C5 or C6 alkenyl substituted 2-pyridones. This robust protocol proceeds with a broad substrate scope and good functional group tolerance under redox-neutral reaction conditions. More significantly, this reaction is highly effective with previously challenging unsymmetrical alkynes, including unbiased alkyl-alkyl substituted alkynes, with perfect and switchable regioselectivity. Additionally, mechanistic studies and DFT calculations were performed to shed light on the switchable regioselectivity.
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Affiliation(s)
- Chao Chen
- Department of Medicinal Chemistry, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, Shandong, 264117, China
| | - Yanni Chen
- Department of Medicinal Chemistry, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
| | - Zijian Han
- State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Yujie Huang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yujiao Wang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Xiuyu Tao
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Lan Wang
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Xiangli Chen
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Ruikai Long
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Yaxi Yang
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
- Department of Medicinal Chemistry, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, Shandong, 264117, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Weiliang Zhu
- State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Bing Zhou
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
- Department of Medicinal Chemistry, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, Shandong, 264117, China
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
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2
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Lu MZ, Goh J, Maraswami M, Jia Z, Tian JS, Loh TP. Recent Advances in Alkenyl sp 2 C-H and C-F Bond Functionalizations: Scope, Mechanism, and Applications. Chem Rev 2022; 122:17479-17646. [PMID: 36240299 DOI: 10.1021/acs.chemrev.2c00032] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Alkenes and their derivatives are featured widely in a variety of natural products, pharmaceuticals, and advanced materials. Significant efforts have been made toward the development of new and practical methods to access this important class of compounds by selectively activating the alkenyl C(sp2)-H bonds in recent years. In this comprehensive review, we describe the state-of-the-art strategies for the direct functionalization of alkenyl sp2 C-H and C-F bonds until June 2022. Moreover, metal-free, photoredox, and electrochemical strategies are also covered. For clarity, this review has been divided into two parts; the first part focuses on currently available alkenyl sp2 C-H functionalization methods using different alkene derivatives as the starting materials, and the second part describes the alkenyl sp2 C-F bond functionalization using easily accessible gem-difluoroalkenes as the starting material. This review includes the scope, limitations, mechanistic studies, stereoselective control (using directing groups as well as metal-migration strategies), and their applications to complex molecule synthesis where appropriate. Overall, this comprehensive review aims to document the considerable advancements, current status, and emerging work by critically summarizing the contributions of researchers working in this fascinating area and is expected to stimulate novel, innovative, and broadly applicable strategies for alkenyl sp2 C-H and C-F bond functionalizations in the coming years.
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Affiliation(s)
- Ming-Zhu Lu
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology, Zhengzhou 450001, China.,School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jeffrey Goh
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Manikantha Maraswami
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Zhenhua Jia
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jie-Sheng Tian
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Teck-Peng Loh
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology, Zhengzhou 450001, China.,School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore.,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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3
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Hubbell GE, Tepe JJ. Rh(III)-Catalyzed C-H Activation/Annulation of Benzohydroxamates and 2-Imidazolones: Access to Urea-Fused-Dihydroisoquinolone Scaffolds Reminiscent of Pyrrole Alkaloid Natural Products. Org Lett 2022; 24:6740-6744. [PMID: 36083605 DOI: 10.1021/acs.orglett.2c02508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A Rh(III)-catalyzed C-H activation/annulation with an imidazolone as alkene partner is reported to access dihydroisoquinolone-fused imidazolin-2-ones. These bicycles are reminiscent of scaffolds belonging to the pyrrole alkaloid family of natural products. This approach facilitates construction of a variety of urea-fused dihydroisoquinolone scaffolds including heterocyclic moieties.
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Affiliation(s)
- Grace E Hubbell
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Jetze J Tepe
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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4
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Saiegh T, Meyer C, Cossy J. Rhodium(III)‐Catalyzed Heteroannulations of 3‐Sulfolene Derivatives via C(sp2)–H Activation. Access to Pyridine ortho‑Quinodimethane Precursors. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tomas Saiegh
- ESPCI Paris Molecular, Macromolecular Chemistry, and Materials FRANCE
| | - Christophe Meyer
- ESPCI Paris, CNRS, PSL Research University Laboratory of Organic Chemsitry 10 rue Vauquelin 75005 PARIS FRANCE
| | - Janine Cossy
- ESPCI: ESPCI Paris Molecular, Macromolecular Chemistry, and Materials PARIS FRANCE
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5
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Wang HH, Wang XD, Yin GF, Zeng YF, Chen J, Wang Z. Recent Advances in Transition-Metal-Catalyzed C–H Alkylation with Three-Membered Rings. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05266] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hui-Hong Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, No. 222 South Tianshui Road, Lanzhou 730000, People’s Republic of China
| | - Xiao-Dong Wang
- School of Pharmacy, Lanzhou University, No. 199 West Donggang Road, Lanzhou 730000, People’s Republic of China
| | - Gao-Feng Yin
- School of Pharmacy, Lanzhou University, No. 199 West Donggang Road, Lanzhou 730000, People’s Republic of China
| | - Yao-Fu Zeng
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang 421001, People’s Republic of China
| | - Jinjin Chen
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang 421001, People’s Republic of China
| | - Zhen Wang
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang 421001, People’s Republic of China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, No. 222 South Tianshui Road, Lanzhou 730000, People’s Republic of China
- School of Pharmacy, Lanzhou University, No. 199 West Donggang Road, Lanzhou 730000, People’s Republic of China
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6
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Nanda SK, Mallik R. 1,2-Difunctionalizations of alkynes entailing concomitant C–C and C–N bond-forming carboamination reactions. RSC Adv 2022; 12:5847-5870. [PMID: 35424576 PMCID: PMC8981577 DOI: 10.1039/d1ra06633a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 01/30/2022] [Indexed: 12/20/2022] Open
Abstract
Vicinal carboamination of alkynes is a highly reliable and efficient practical strategy for the quick preparation of valuable and diverse amine derivatives starting from simple synthons. The last decade has witnessed numerous practical methods employing transition-metal-based/metal-free carboamination approaches using alkynes for the synthesis of these N-bearing entities. Driven by the renaissance of transition metal catalysis, intermolecular and intramolecular carboamination of alkynes comprising concomitant C–N and C–C bond formation has been studied extensively. In contrast to metal catalysis, though analogous metal-free approaches have been relatively less explored in the literature, they serve as alternatives to these expensive approaches. Despite this significant progress, reviews documenting such examples are sporadic; as a result, most reports of this type remained scattered throughout the literature, thereby hampering further developments in this escalating field. In this review, different conceptual approaches will be discussed and examples from the literature will be presented. Further, the reader will get insight into the mechanisms of different transformations. The 1,2-difunctionalization of alkynes happening through concomitant C–C and C–N bond formation strategies have provide an unified access to diversely functionalized N-bearing heterocycles.![]()
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Affiliation(s)
- Santosh Kumar Nanda
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha-761211, India
| | - Rosy Mallik
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha-761211, India
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7
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Pan S, Sarkar S, Ghosh B, Samanta R. Transition metal catalysed direct construction of 2-pyridone scaffolds through C-H bond functionalizations. Org Biomol Chem 2021; 19:10516-10529. [PMID: 34816862 DOI: 10.1039/d1ob01856f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Substituted 2-pyridone is one of the most frequent scaffolds among nitrogen-containing bioactive natural products, pharmaceuticals and organic materials. Besides the classical syntheses to construct this class of molecules, retrosynthetically more straightforward approaches based on transition metal catalysed C-H bond functionalizations have been explored recently. In this review, we have summarized the recent progress in the direct transition metal catalysed construction of substituted 2-pyridone scaffolds via site-selective C-H bond functionalizations.
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Affiliation(s)
- Subarna Pan
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Souradip Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Bidhan Ghosh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Rajarshi Samanta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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8
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Mukherjee S, Pramanik A. Mild and Expeditious Synthesis of Sulfenyl Enaminones of l-α-Amino Esters and Aryl/Alkyl Amines through NCS-Mediated Sulfenylation. ACS OMEGA 2021; 6:33805-33821. [PMID: 34926928 PMCID: PMC8675011 DOI: 10.1021/acsomega.1c05058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 11/18/2021] [Indexed: 06/14/2023]
Abstract
Sulfenylation or selenylation of enaminones of l-α-amino esters requires mild reaction conditions due to the presence of a racemization-prone chiral center and reactive side chains. An N-chlorosuccinimide (NCS)-mediated methodology has been developed for rapid sulfenylation of enaminones of l-α-amino esters and aryl/alkyl amines at room temperature in open air under metal-free conditions. Enaminones of l-α-amino esters bearing aliphatic, aromatic, and heterocyclic side chains react efficiently with diverse aryl/alkyl/heteroaryl thiols (R1SH) in the presence of NCS to afford a library of biologically important sulfenyl enaminones in good-to-excellent yields (71-90%). Under similar reaction conditions, the enaminones also react with benzeneselenol to produce selenyl enaminones in good yield (73-83%). The NCS-mediated pathway generates sulfenyl chloride (R1SCl) as an intermediate which leads to rapid sulfenylation of enaminones through cross-dehydrogenative coupling (CDC) under mild reaction conditions.
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Affiliation(s)
- Sayan Mukherjee
- Department of Chemistry, University
of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Animesh Pramanik
- Department of Chemistry, University
of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
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9
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Labadie SS, Thai K, Grandner JM, Liu Y, Parr BT. Enyne Amides to Fused Pyridones: Scope and Limitations. J Org Chem 2021; 86:14177-14191. [PMID: 34337936 DOI: 10.1021/acs.joc.1c00688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we present an investigation into the scope and mechanism for the synthesis of cyclopentyl and heterocyclic fused pyridones from the corresponding enyne amides. In the presence of a secondary amine, cyclization proceeds smoothly to form 5,6-bicyclic pyridones in 12-90% yield. The cyclization fails with enyne amides of six-membered and larger ring systems. The ring closure reaction is catalytic in nature with respect to the secondary amine and proceeds via sequential 1,6-addition of the amine, 6-exo-trig ring closure of the iminium intermediate, and subsequent elimination of the secondary amine. Computations show reduced conjugation between the enyne and amide for six-membered and larger systems, thereby providing an explanation for the inability of such enyne amides to form fused pyridones.
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Affiliation(s)
- Sharada S Labadie
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Karine Thai
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jessica M Grandner
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Yanzhou Liu
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Brendan T Parr
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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10
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Comesse S, Alahyen I, Benhamou L, Dalla V, Taillier C. 20 Years of Forging N-Heterocycles from Acrylamides through Domino/Cascade Reactions. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1503-7932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
AbstractAcrylamides are versatile building blocks that are easily obtained from readily available starting materials. During the last 20 years, these valuable substrates bearing a nucleophilic nitrogen atom and an electrophilic double bond have proven to be efficient domino partners, leading to a wide variety of complex aza-heterocycles of synthetic relevance. In this non-exhaustive review, metal-free and metal-triggered reactions followed by an annulation will be presented; these two approaches allow good modulation of the reactivity of the polyvalent acrylamides.1 Introduction2 Metal-Free Annulations2.1 Domino Reactions Triggered by a Michael Addition2.2 Domino Reactions Triggered by an Aza-Michael Addition2.3 Domino Processes Triggered by an Acylation Reaction2.4 Domino Reactions Triggered by a Baylis–Hillman Reaction2.5 Cycloadditions and Domino Reactions2.6 Miscellaneous Domino Reactions3 Metal-Triggered/Mediated Annulations3.1 Zinc-Promoted Transformations3.2 Rhodium-Catalyzed Functionalization/Annulation Cascades3.3 Cobalt-Catalyzed Functionalization/Annulation Cascades3.4 Ruthenium-Catalyzed Functionalization/Annulation Cascades3.5 Iron-Catalyzed Functionalization/Annulation Cascades3.6 Palladium-Catalyzed Functionalization/Annulation Cascades3.7 Copper-Catalyzed Transformations3.8 Transition Metals Acting in Tandem in Domino Processes4 Radical Cascade Reactions5 Conclusion
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11
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Cui Y, Bai D, Liu B, Chang J, Li X. Rh(iii)-Catalyzed acylation of heteroarenes with cyclobutenones via C-H/C-C bond activation. Chem Commun (Camb) 2020; 56:15631-15634. [PMID: 33283807 DOI: 10.1039/d0cc05965j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Rhodium(iii)-catalyzed C-H acylation of heteroarenes has been realized using cyclobutenones as an acylating reagent. This coupling proceeded via integration of C-H activation of heteroarenes and C-C cleavage of cyclobutenones. The reaction features excellent regio/chemoselectivity leading to versatile chalcones with exclusive E-selectivity.
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Affiliation(s)
- Yixin Cui
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China.
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12
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Nie B, Wu W, Ren Q, Wang Z, Zhang J, Zhang Y, Jiang H. Access to Cycloalkeno[ c]-Fused Pyridines via Pd-Catalyzed C(sp 2)-H Activation and Cyclization of N-Acetyl Hydrazones of Acylcycloalkenes with Vinyl Azides. Org Lett 2020; 22:7786-7790. [PMID: 32990446 DOI: 10.1021/acs.orglett.0c02466] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel Pd(II)-catalyzed vinylic C-H activation and cyclization has been developed, reacting a series of small, medium, and large N-acetyl hydrazones of acylcycloalkenes with vinyl azides to access diverse cycloalkeno[c]-fused pyridine scaffolds. This protocol provides progress in C(sp2)-H bond activation of medium to large cycloalkenes, and the target products can be obtained in a specific regioselectivity with good functional group tolerance and a broad substrate scope.
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Affiliation(s)
- Biao Nie
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Qingyun Ren
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Zhongqing Wang
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Ji Zhang
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Yingjun Zhang
- State Key Laboratory of Anti-Infective Drug Development (No. 2015DQ780357), Sunshine Lake Pharma Company, Ltd., Dongguan 523871, China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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13
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Song L, Zhang X, Tang X, Van Meervelt L, Van der Eycken J, Harvey JN, Van der Eycken EV. Ruthenium-catalyzed cascade C-H activation/annulation of N-alkoxybenzamides: reaction development and mechanistic insight. Chem Sci 2020; 11:11562-11569. [PMID: 34094402 PMCID: PMC8162874 DOI: 10.1039/d0sc04434b] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A highly selective ruthenium-catalyzed C–H activation/annulation of alkyne-tethered N-alkoxybenzamides has been developed. In this reaction, diverse products from inverse annulation can be obtained in moderate to good yields with high functional group compatibility. Insightful experimental and theoretical studies indicate that the reaction to the inverse annulation follows the Ru(ii)–Ru(iv)–Ru(ii) pathway involving N–O bond cleavage prior to alkyne insertion. This is highly different compared to the conventional mechanism of transition metal-catalyzed C–H activation/annulation with alkynes, involving alkyne insertion prior to N–O bond cleavage. Via this pathway, the in situ generated acetic acid from the N–H/C–H activation step facilitates the N–O bond cleavage to give the Ru-nitrene species. Besides the conventional mechanism forming the products via standard annulation, an alternative and novel Ru(ii)–Ru(iv)–Ru(ii) mechanism featuring N–O cleavage preceding alkyne insertion has been proposed, affording a new understanding of transition metal-catalyzed C–H activation/annulation. A highly selective ruthenium-catalyzed C–H activation/annulation through a pathway involving N–O bond cleavage prior to alkyne insertion is developed.![]()
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Xiaoyong Zhang
- Theoretical and Computational Chemistry, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Xiao Tang
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology Gardens Point Campus Brisbane QLD 4001 Australia
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University Krijgslaan 281 (S.4) B-9000 Ghent Belgium
| | - Jeremy N Harvey
- Theoretical and Computational Chemistry, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium .,Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Street 6 Moscow 117198 Russia
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14
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Shaaban S, Davies C, Merten C, Flegel J, Otte F, Strohmann C, Waldmann H. Rh III -Catalyzed C-H Activation of Aryl Hydroxamates for the Synthesis of Isoindolinones. Chemistry 2020; 26:10729-10734. [PMID: 32428319 PMCID: PMC7496876 DOI: 10.1002/chem.202002384] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Indexed: 01/20/2023]
Abstract
RhIII -catalyzed C-H functionalization reaction yielding isoindolinones from aryl hydroxamates and ortho-substituted styrenes is reported. The reaction proceeds smoothly under mild conditions at room temperature, and tolerates a range of functional groups. Experimental and computational investigations support that the high regioselectivity observed for these substrates results from the presence of an ortho-substituent embedded in the styrene. The resulting isoindolinones are valuable building blocks for the synthesis of bioactive compounds. They provide easy access to the natural-product-like compounds, isoindolobenzazepines, in a one-pot two-step reaction. Selected isoindolinones inhibited Hedgehog (Hh)-dependent differentiation of multipotent murine mesenchymal progenitor stem cells into osteoblasts.
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Affiliation(s)
- Saad Shaaban
- Max-Planck-Institute of Molecular PhysiologyDepartment of Chemical BiologyOtto-Hahn-Strasse 1144227DortmundGermany
| | - Caitlin Davies
- Max-Planck-Institute of Molecular PhysiologyDepartment of Chemical BiologyOtto-Hahn-Strasse 1144227DortmundGermany
- Technical University DortmundFaculty of Chemical BiologyOtto-Hahn-Strasse 4a44227DortmundGermany
| | - Christian Merten
- Ruhr University BochumOrganic Chemistry IIUniversitätsstrasse 15044801BochumGermany
| | - Jana Flegel
- Max-Planck-Institute of Molecular PhysiologyDepartment of Chemical BiologyOtto-Hahn-Strasse 1144227DortmundGermany
- Technical University DortmundFaculty of Chemical BiologyOtto-Hahn-Strasse 4a44227DortmundGermany
| | - Felix Otte
- Technical University DortmundDepartment of Inorganic ChemistryOtto-Hahn-Strasse 644227DortmundGermany
| | - Carsten Strohmann
- Technical University DortmundDepartment of Inorganic ChemistryOtto-Hahn-Strasse 644227DortmundGermany
| | - Herbert Waldmann
- Max-Planck-Institute of Molecular PhysiologyDepartment of Chemical BiologyOtto-Hahn-Strasse 1144227DortmundGermany
- Technical University DortmundFaculty of Chemical BiologyOtto-Hahn-Strasse 4a44227DortmundGermany
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15
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Tan JF, Bormann CT, Severin K, Cramer N. Alkynyl Triazenes as Fluoroalkyne Surrogates: Regioselective Access to 4-Fluoro-2-pyridones by a Rh(III)-Catalyzed C–H Activation–Lossen Rearrangement–Wallach Reaction. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00499] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jin-Fay Tan
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Carl Thomas Bormann
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Kay Severin
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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16
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Pham PH, Nguyen KX, Nguyen NP, Pham HTB, Nguyen TT, Phan NTS. 2‐Benzoyl Thienothiazoles from Annulation of C−H Bonds in Acetophenone Oximes. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Phuc H. Pham
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
| | - Khang X. Nguyen
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
| | - Ninh P. Nguyen
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
| | - Hoai T. B. Pham
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
- Department of ChemistryUniversity of Colorado Denver Denver CO 80204 USA
| | - Tung T. Nguyen
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
| | - Nam T. S. Phan
- Faculty of Chemical EngineeringHo Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
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17
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Vivek Kumar S, Banerjee S, Punniyamurthy T. Transition metal-catalyzed coupling of heterocyclic alkenes via C–H functionalization: recent trends and applications. Org Chem Front 2020. [DOI: 10.1039/d0qo00279h] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Heterocyclic alkenes and their derivatives are an important class of reactive feedstock and valuable synthons. This review highlights the transition-metal-catalyzed coupling of heterocyclic alkenes via a C–H functionalization strategy.
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18
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Mihara G, Noguchi T, Nishii Y, Hayashi Y, Kawauchi S, Miura M. Rhodium-Catalyzed Annulative Coupling of Isothiazoles with Alkynes through N-S Bond Cleavage. Org Lett 2019; 22:661-665. [PMID: 31886679 DOI: 10.1021/acs.orglett.9b04437] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A Rh(III)-catalyzed annulative coupling of 3,5-diarylisothiazoles and alkynes is reported. The N-S bond in the isothiazole ring acts as an internal oxidant to regenerate the Rh(III) species in combination with an external Cu(II) oxidant, and the corresponding 1:2 coupling products are obtained. The remarkable difference in the reaction outcome between isothiazoles and the relevant isoxazoles has been investigated by DFT calculations, revealing that the relative stability of the enolate intermediates dictates the product selectivity.
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Affiliation(s)
| | | | | | - Yoshihiro Hayashi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo 152-8552 , Japan
| | - Susumu Kawauchi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo 152-8552 , Japan
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