1
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Wang Z, Zhang J, Gai C, Wang J, Zhuo X, Song Y, Zou Y, Zhang P, Hou G, Meng Q, Zhao Q, Chai X. Discovery of dibenzylbutane lignan LCA derivatives as potent anti-inflammatory agents. RSC Med Chem 2024; 15:2114-2126. [PMID: 38911165 PMCID: PMC11187555 DOI: 10.1039/d4md00053f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 06/17/2024] [Accepted: 04/15/2024] [Indexed: 06/25/2024] Open
Abstract
Inflammation is the body's response to defence against infection or injury, and is associated with the progression of many diseases, such as inflammatory bowel disease (IBD) and rheumatoid arthritis (RA). LCA, a dibenzylbutane lignan extracted from the roots of traditional medicinal plant Litsea cubeba (Lour.) Pers., has demonstrated promising anti-inflammatory activity. In this study, a series of novel LCA derivatives were designed, synthesized, and evaluated for anti-inflammatory activity. Lipopolysaccharide (LPS)-induced RAW 264.7 cell model experiments showed that compound 10h (at 20 μM of concentration) had the strongest inhibitory effect on NO release, and inhibited the secretion and gene expression levels of interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α in vitro. In addition, western blot, immunofluorescence, and molecular docking showed that the anti-inflammatory mechanism of compound 10h may be related to the nuclear factor (NF)-κB signalling pathway. In vivo studies based on a carrageenan-induced mouse paw edema model have shown significant anti-inflammatory activity of compound 10h at 20 mg kg-1. Preliminary in vitro and in vivo studies indicate that compound 10h has the potential to be developed as a novel anti-inflammatory agent.
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Affiliation(s)
- Zhen Wang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Yantai University Yantai 264005 China
| | - Juan Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Yantai University Yantai 264005 China
| | - Conghao Gai
- Department of Organic Chemistry, School of Pharmacy, Naval Medical University Shanghai 200433 China
| | - Jing Wang
- Department of Organic Chemistry, School of Pharmacy, Naval Medical University Shanghai 200433 China
| | - Xiaobin Zhuo
- Department of Organic Chemistry, School of Pharmacy, Naval Medical University Shanghai 200433 China
| | - Yan Song
- Navy Medical Center, Naval Medical University Shanghai 200433 China
| | - Yan Zou
- Department of Organic Chemistry, School of Pharmacy, Naval Medical University Shanghai 200433 China
| | - Peichao Zhang
- Department of Organic Chemistry, School of Pharmacy, Naval Medical University Shanghai 200433 China
| | - Guige Hou
- School of Pharmacy, Binzhou Medical University Yantai 264003 China
| | - Qingguo Meng
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Yantai University Yantai 264005 China
| | - Qingjie Zhao
- Department of Organic Chemistry, School of Pharmacy, Naval Medical University Shanghai 200433 China
| | - Xiaoyun Chai
- Department of Organic Chemistry, School of Pharmacy, Naval Medical University Shanghai 200433 China
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2
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Yang D, Zhang X, Wang X, Si XJ, Wang J, Wei D, Song MP, Niu JL. Cobalt-Catalyzed Enantioselective C–H Annulation with Alkenes. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Dandan Yang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Xian Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Xinghua Wang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Xiao-Ju Si
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Jingtao Wang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Donghui Wei
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Mao-Ping Song
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Jun-Long Niu
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
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3
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Xiong W, Wang Y, Yang X, Liu WH. Selective Hydrolysis of Primary and Secondary Amides Enabled by Visible Light. Org Lett 2023; 25:2948-2952. [PMID: 36853098 DOI: 10.1021/acs.orglett.3c00354] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Amide hydrolysis is a fundamentally important transformation in organic chemistry. Developing hydrolysis procedures under mild conditions with a broad substrate scope is desirable. Herein, by leveraging a photoresponsive auxiliary o-nitroanilide, we established a mild two-step protocol for the hydrolysis of primary and secondary amides. This protocol is driven by visible light irradiation at room temperature under neutral conditions, which tolerates numerous acid- and base-sensitive functional groups. Various drugs, natural product-, and amino acid-derived amides can be selectively hydrolyzed.
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Affiliation(s)
- Wenzhang Xiong
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Yichun Wang
- College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Xiaobo Yang
- College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning 110034, China
| | - Wenbo H Liu
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
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4
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Zayene M, Le Bideau F, Retailleau P, Jannet HB, Alami M, Romdhane A, Messaoudi S. Site-Selective Palladium(II)-Catalyzed Methylene C(sp 3)-H Diarylation of a Tropane Scaffold. J Org Chem 2022; 87:16399-16409. [PMID: 36473230 DOI: 10.1021/acs.joc.2c02081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of 2,4-di-arylated tropane derivatives was synthesized through a site-selective palladium-catalyzed β-C(sp3)-H di-arylation process. This type of structure has been scarcely reported in literature. They nevertheless represent an interesting class of biologically relevant molecules as illustrated by the observed activity at the micromolecular level of eight derivatives toward human colorectal cancer cell line HCT116.
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Affiliation(s)
- Mayssa Zayene
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France.,Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Avenue of Environment, Faculty of Science of Monastir, University of Monastir, 5019 Monastir, Tunisia
| | - Franck Le Bideau
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Universite Paris-Saclay, avenue de la terrasse, 91198 Gif-sur-Yvette, France
| | - Hichem Ben Jannet
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Avenue of Environment, Faculty of Science of Monastir, University of Monastir, 5019 Monastir, Tunisia
| | - Mouad Alami
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France
| | - Anis Romdhane
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Avenue of Environment, Faculty of Science of Monastir, University of Monastir, 5019 Monastir, Tunisia
| | - Samir Messaoudi
- Université Paris-Saclay, BioCIS, CNRS, 5 rue J-B Clément, 92296 Châtenay-Malabry cedex, France
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5
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LI L, Mahri L, de Robichon M, Fatthalla M, Ferry A, MESSAOUDI S. Directed Dehydrogenative Copper‐Catalyzed C‐H Thiolation in Pseudo‐Anomeric Position of Glycals using Thiol and Thiosugar Partners. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Piticari A, Antermite D, Higham JI, Moore JH, Webster MP, Bull JA. Stereoselective Palladium‐Catalyzed C(
sp
3
)−H Mono‐Arylation of Piperidines and Tetrahydropyrans with a C(4) Directing Group. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Amalia‐Sofia Piticari
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane London W12 0BZ UK
| | - Daniele Antermite
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane London W12 0BZ UK
| | - Joe I. Higham
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane London W12 0BZ UK
| | - J. Harry Moore
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane London W12 0BZ UK
| | | | - James A. Bull
- Department of Chemistry Imperial College London Molecular Sciences Research Hub White City Campus Wood Lane London W12 0BZ UK
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7
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Azeem Z, Mandal PK. Recent advances in palladium-catalyzed C(sp 3)/C(sp 2)-H bond functionalizations: access to C-branched glycosides. Org Biomol Chem 2022; 20:264-281. [PMID: 34904995 DOI: 10.1039/d1ob02142g] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Over the recent decades, tremendous interest has developed in the transformation of complex substrates by C-H activation and functionalization. In particular, palladium-catalyzed directing and non-directing group-assisted C-H functionalization has emerged as a powerful avenue to access C-branched glycosides. Due to the extreme complexity, delicate functionalities, and high stability of C-H bonds, site-selective functionalization of carbohydrate under mild conditions is highly desirable. The purpose of this review is to cover most of the recent advances in palladium-catalyzed C(sp3) and C(sp2)-H bond functionalizations for the synthesis of C-branched glycosides along with future directions.
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Affiliation(s)
- Zanjila Azeem
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extn, Sitapur Road, P.O. Box 173, Lucknow 226031, India. .,Academy of Scientific and Innovative Research, Ghaziabad-201002, India
| | - Pintu Kumar Mandal
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extn, Sitapur Road, P.O. Box 173, Lucknow 226031, India. .,Academy of Scientific and Innovative Research, Ghaziabad-201002, India
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8
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Wang F, Han Y, Yu L, Zhu D. Decarboxylative Amination of Benzoic Acids Bearing Electron-Donating Substituents and Non-Activated Amines. Org Chem Front 2022. [DOI: 10.1039/d2qo00453d] [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
Efficient methods for decarboxylative activation of benzoic acids into great valuable products are highly sought after. Here we report a highly desirable and straightforward decarboxylative amination of readily available benzoic...
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9
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Lian P, Li R, Wang L, Wan X, Xiang Z, Wan X. Photoredox aerobic oxidation of unreactive amine derivatives through LMCT excitation of copper dichloride. Org Chem Front 2022. [DOI: 10.1039/d2qo01032a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Taking advantage of the chlorine radical as a HAT catalyst, a versatile oxidation system for unreactive amines has been well established.
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Affiliation(s)
- Pengcheng Lian
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Ruyi Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Lili Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xiao Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Zixin Xiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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10
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Liu B, Romine AM, Rubel CZ, Engle KM, Shi BF. Transition-Metal-Catalyzed, Coordination-Assisted Functionalization of Nonactivated C(sp 3)-H Bonds. Chem Rev 2021; 121:14957-15074. [PMID: 34714620 PMCID: PMC8968411 DOI: 10.1021/acs.chemrev.1c00519] [Citation(s) in RCA: 186] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Transition-metal-catalyzed, coordination-assisted C(sp3)-H functionalization has revolutionized synthetic planning over the past few decades as the use of these directing groups has allowed for increased access to many strategic positions in organic molecules. Nonetheless, several challenges remain preeminent, such as the requirement for high temperatures, the difficulty in removing or converting directing groups, and, although many metals provide some reactivity, the difficulty in employing metals outside of palladium. This review aims to give a comprehensive overview of coordination-assisted, transition-metal-catalyzed, direct functionalization of nonactivated C(sp3)-H bonds by covering the literature since 2004 in order to demonstrate the current state-of-the-art methods as well as the current limitations. For clarity, this review has been divided into nine sections by the transition metal catalyst with subdivisions by the type of bond formation. Synthetic applications and reaction mechanism are discussed where appropriate.
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Affiliation(s)
- Bin Liu
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 38 Zheda Rd., Hangzhou 310027, China.,College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Andrew M. Romine
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Camille Z. Rubel
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States.,Corresponding Author- (K. M. E.); (B.-F. S.)
| | - Bing-Feng Shi
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, 38 Zheda Rd., Hangzhou 310027, China.,College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China,Corresponding Author- (K. M. E.); (B.-F. S.)
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11
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Jeon J, Lee C, Park I, Hong S. Regio- and Stereoselective Functionalization Enabled by Bidentate Directing Groups. CHEM REC 2021; 21:3613-3627. [PMID: 34086390 DOI: 10.1002/tcr.202100117] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 12/15/2022]
Abstract
Chelation-assisted C-H bond and alkene functionalization using bidentate directing groups offers an elegant and versatile approach to overcome regiocontrol issues by allowing the catalyst to come into close proximity with the targeted sites. In this personal account, we highlight our recent works in developing regio- and stereocontrolled functionalizations through transition-metal catalysis enabled by bidentate directing groups. We classify our results into two categories: (1) regioselective alkene functionalization using bidentate directing groups, and (2) asymmetric C-H functionalization using chiral bidentate directing groups. Furthermore, density functional theory studies to elucidate the origin of the regio- and stereoselectivity exerted by bidentate directing groups are discussed.
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Affiliation(s)
- Jinwon Jeon
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Changseok Lee
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Inyoung Park
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
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12
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13
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Zhang H, Lv X, Yu H, Bai Z, Chen G, He G. β-Lactam Synthesis via Copper-Catalyzed Directed Aminoalkylation of Unactivated Alkenes with Cyclobutanone O-Benzoyloximes. Org Lett 2021; 23:3620-3625. [DOI: 10.1021/acs.orglett.1c01007] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Heng Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaoyan Lv
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hanrui Yu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zibo Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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14
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Fitzgerald LS, O'Duill ML. A Guide to Directing Group Removal: 8-Aminoquinoline. Chemistry 2021; 27:8411-8436. [PMID: 33559933 DOI: 10.1002/chem.202100093] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 02/08/2021] [Indexed: 12/23/2022]
Abstract
The use of directing groups allows high levels of selectivity to be achieved in transition metal-catalyzed transformations. Efficient removal of these auxiliaries after successful functionalization, however, can be very challenging. This review provides a critical overview of strategies used for removal of Daugulis' 8-aminoquinoline (2005-2020), one of the most widely used N,N-bidentate directing groups. The limitations of these strategies are discussed and alternative approaches are suggested for challenging substrates. Our aim is to provide a comprehensive end-users' guide for chemists in academia and industry who want to harness the synthetic power of directing groups-and be able to remove them from their final products.
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Affiliation(s)
- Liam S Fitzgerald
- School of Chemistry, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland
| | - Miriam L O'Duill
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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15
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Bai Z, Zhang H, Wang H, Yu H, Chen G, He G. Enantioselective Alkylamination of Unactivated Alkenes under Copper Catalysis. J Am Chem Soc 2020; 143:1195-1202. [PMID: 33378201 DOI: 10.1021/jacs.0c12333] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An enantioselective addition reaction of various alkyl groups to unactivated internal alkenes under Cu catalysis has been developed. The reaction uses amide-linked aminoquinoline as the directing group, 4-alkyl Hantzsch esters as the donor of alkyl radicals, and rarely used biaryl diphosphine oxide as a chiral ligand. β-lactams featuring two contiguous stereocenters at Cβ and the β substituent can be obtained in good yield with excellent enantioselectivity. Mechanistic studies indicate that a nucleophilic addition of the alkyl radical to CuII-coordinated alkene is the enantio-determining step.
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Affiliation(s)
- Zibo Bai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Heng Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hao Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hanrui Yu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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16
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Ghouilem J, de Robichon M, Le Bideau F, Ferry A, Messaoudi S. Emerging Organometallic Methods for the Synthesis of C-Branched (Hetero)aryl, Alkenyl, and Alkyl Glycosides: C-H Functionalization and Dual Photoredox Approaches. Chemistry 2020; 27:491-511. [PMID: 32813294 DOI: 10.1002/chem.202003267] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 07/31/2020] [Indexed: 12/15/2022]
Abstract
Transition-metal-catalyzed C-H functionalization and photoredox nickel dual catalysis have emerged as innovative and powerful avenues for the synthesis of C-branched glycosides. These two concepts have been recently established and provide efficient and mild methods for accessing a series of valuable complex C-branched glycosides of great interest. Herein, recent developments in the synthesis of C-branched aryl/alkenyl/alkyl glycosides through these two approaches are highlighted.
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Affiliation(s)
- Juba Ghouilem
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
| | - Morgane de Robichon
- CY Cergy-Paris Université, BioCIS, Equipe de Chimie Biologique, CNRS, 95000, Neuville sur Oise, France
| | - Franck Le Bideau
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
| | - Angélique Ferry
- CY Cergy-Paris Université, BioCIS, Equipe de Chimie Biologique, CNRS, 95000, Neuville sur Oise, France
| | - Samir Messaoudi
- Université Paris-Saclay, BioCIS, Faculté de Pharmacie, CNRS, 92290, Châtenay-Malabry, France
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17
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Lanzi M, Cera G. Iron-Catalyzed C-H Functionalizations under Triazole-Assistance. Molecules 2020; 25:E1806. [PMID: 32326406 PMCID: PMC7221773 DOI: 10.3390/molecules25081806] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/10/2020] [Accepted: 04/11/2020] [Indexed: 11/16/2022] Open
Abstract
3d transition metals-catalyzed C-H bond functionalizations represent nowadays an important tool in organic synthesis, appearing as the most promising alternative to cross-coupling reactions. Among 3d transition metals, iron found widespread application due to its availability and benign nature, and it was established as an efficient catalyst in organic synthesis. In this context, the use of ortho-orientating directing groups (DGs) turned out to be necessary for promoting selective iron-catalyzed C-H functionalization reactions. Very recently, triazoles DGs were demonstrated to be more than an excellent alternative to the commonly employed 8-aminoquinoline (AQ) DG, as a result of their modular synthesis as well as the mild reaction conditions applied for their removal. In addition, their tunable geometry and electronics allowed for new unprecedented reactivities in iron-catalyzed C-H activation methodologies that will be summarized within this review.
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Affiliation(s)
- Matteo Lanzi
- Laboratoire de Chemie Moléculaire (UMR CNRS 7509), Université de Strasbourg, ECPM 25 Rue Becquerel, 67087 Strasbourg, France;
| | - Gianpiero Cera
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/A, I-43124 Parma, Italy
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18
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Rej S, Ano Y, Chatani N. Bidentate Directing Groups: An Efficient Tool in C-H Bond Functionalization Chemistry for the Expedient Construction of C-C Bonds. Chem Rev 2020; 120:1788-1887. [PMID: 31904219 DOI: 10.1021/acs.chemrev.9b00495] [Citation(s) in RCA: 561] [Impact Index Per Article: 140.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
During the past decades, synthetic organic chemistry discovered that directing group assisted C-H activation is a key tool for the expedient and siteselective construction of C-C bonds. Among the various directing group strategies, bidentate directing groups are now recognized as one of the most efficient devices for the selective functionalization of certain positions due to fact that its metal center permits fine, tunable, and reversible coordination. The family of bidentate directing groups permit various types of assistance to be achieved, such as N,N-dentate, N,O-dentate, and N,S-dentate auxiliaries, which are categorized based on the coordination site. In this review, we broadly discuss various C-H bond functionalization reactions for the formation of C-C bonds with the aid of bidentate directing groups.
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Affiliation(s)
- Supriya Rej
- Department of Applied Chemistry, Faculty of Engineering , Osaka University , Suita , Osaka 560-0871 , Japan
| | - Yusuke Ano
- Department of Applied Chemistry, Faculty of Engineering , Osaka University , Suita , Osaka 560-0871 , Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering , Osaka University , Suita , Osaka 560-0871 , Japan
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19
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Isley NA, Endo Y, Wu ZC, Covington BC, Bushin LB, Seyedsayamdost MR, Boger DL. Total Synthesis and Stereochemical Assignment of Streptide. J Am Chem Soc 2019; 141:17361-17369. [PMID: 31577142 DOI: 10.1021/jacs.9b09067] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Streptide (1) is a peptide-derived macrocyclic natural product that has attracted considerable attention since its discovery in 2015. It contains an unprecedented post-translational modification that intramolecularly links the β-carbon (C3) of a residue 2 lysine with the C7 of a residue 6 tryptophan, thereby forming a 20-membered cyclic peptide. Herein, we report the first total synthesis of streptide that confirms the regiochemistry of the lysine-tryptophan cross-link and provides an unambiguous assignment of the stereochemistry (3R vs 3S) of the lysine-2 C3 center. Both the 3R and the originally assigned 3S lysine diastereomers were independently prepared by total synthesis, and it is the former, not the latter, that was found to correlate with the natural product. The approach enlists a powerful Pd(0)-mediated indole annulation for the key macrocyclization of the complex core peptide, utilizes an underdeveloped class of hypervalent iodine(III) aryl substrates in a palladium-catalyzed C-H activation/β-arylation reaction conducted on a lysine derivative, and provides access to material with which the role of streptide and related natural products may be examined.
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Affiliation(s)
- Nicholas A Isley
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Yusuke Endo
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Zhi-Chen Wu
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Brett C Covington
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Leah B Bushin
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | | | - Dale L Boger
- Department of Chemistry and Skaggs Institute for Chemical Biology , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
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20
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Sagara PS, Siril PF, Ravikumar PC. N-Amino-7-azaindole as the N,N′-Bidentate Directing Group: Ruthenium-Catalyzed Oxidative Annulation of N-(7-Azaindole)benzamides with Alkynes via C–H Bond Activation. J Org Chem 2019; 84:12314-12323. [DOI: 10.1021/acs.joc.9b01598] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Prateep Singh Sagara
- School of Basic Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
| | - Prem Felix Siril
- School of Basic Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
| | - Ponneri Chandrababu Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Jatani Campus, Odisha 752050, India
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21
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Nicke L, Horx P, Harms K, Geyer A. Directed C(sp 3)-H arylation of tryptophan: transformation of the directing group into an activated amide. Chem Sci 2019; 10:8634-8641. [PMID: 31803437 PMCID: PMC6844298 DOI: 10.1039/c9sc03440d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 08/03/2019] [Indexed: 12/18/2022] Open
Abstract
The aminoquinoline-directed C–H activation was used to synthezise unnatural tryptophans for solid phase peptide synthesis for the first time.
The 8-aminoquinoline (8AQ) directed C(sp3)–H functionalization was applied in the synthesis of β-arylated tryptophan derivatives. The laborious protecting group reorganization towards α-amino acids compatible for solid phase peptide synthesis (SPPS) was cut short by the transformation of the directing group into an activated amide, which was either used directly in peptide coupling or in the gram scale synthesis of storable Fmoc-protected amino acids for SPPS. In this work, directed C–H activation and nonplanar amide chemistry complement each other for the synthesis of hybrids between phenylalanine and tryptophan with restricted side chain mobility.
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Affiliation(s)
- Lennart Nicke
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
| | - Philip Horx
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
| | - Klaus Harms
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
| | - Armin Geyer
- Philipps-Universität Marburg , Fachbereich Chemie , Hans Meerwein Straße , 35032 Marburg , Germany .
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22
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St John‐Campbell S, Bull JA. Base Metal Catalysis in Directed C(
sp
3
)−H Functionalisation. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900532] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - James A. Bull
- Molecular Sciences Research HubWhite City Campus Wood Lane London W12 0BZ U.K
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23
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24
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Zhang Z, Li X, Song M, Wan Y, Zheng D, Zhang G, Chen G. Selective Removal of Aminoquinoline Auxiliary by IBX Oxidation. J Org Chem 2019; 84:12792-12799. [DOI: 10.1021/acs.joc.9b01362] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Zhiguo Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, 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, Henan 453007, China
| | - Xiang Li
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, 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, Henan 453007, China
| | - Mengmeng Song
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, 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, Henan 453007, China
| | - Yameng Wan
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, 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, Henan 453007, China
| | - Dan Zheng
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, 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, Henan 453007, China
| | - Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, 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, Henan 453007, China
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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25
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Padmavathi R, Babu SA. Palladium‐Catalyzed 8‐Aminoquinoline‐Aided sp
2
δ
‐C−H Intramolecular Amidation/Annulation: A Route to Tricyclic Quinolones. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900109] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rayavarapu Padmavathi
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O. Punjab 140306 India
| | - Srinivasarao Arulananda Babu
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O. Punjab 140306 India
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26
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Schmitz AJ, Ricke A, Oschmann M, Verho O. Convenient Access to Chiral Cyclobutanes with Three Contiguous Stereocenters from Verbenone by Directed C(sp
3
)−H arylation. Chemistry 2019; 25:5154-5157. [DOI: 10.1002/chem.201806416] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Alexander J. Schmitz
- Department of Organic ChemistryArrhenius Laboratory Stockholm University 10691 Stockholm Sweden
- Institut für Organische ChemieRWTH Aachen 52056 Aachen Germany
| | - Alexander Ricke
- Department of Organic ChemistryArrhenius Laboratory Stockholm University 10691 Stockholm Sweden
| | - Michael Oschmann
- Department of Organic ChemistryArrhenius Laboratory Stockholm University 10691 Stockholm Sweden
| | - Oscar Verho
- Department of Organic ChemistryArrhenius Laboratory Stockholm University 10691 Stockholm Sweden
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27
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Shi P, Wang J, Gan Z, Zhang J, Zeng R, Zhao Y. A practical copper-catalyzed approach to β-lactams via radical carboamination of alkenyl carbonyl compounds. Chem Commun (Camb) 2019; 55:10523-10526. [PMID: 31415048 DOI: 10.1039/c9cc05668h] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalized β-lactams are highly important motifs in synthetic chemistry. We report an efficient and novel approach to the synthesis of β-lactams via a copper(i)-catalyzed cascade process involving C(benzyl)-H radical abstraction, intermolecular alkene addition, and intramolecular amination reaction. Variously substituted alkenes were synthesized from vinylacetic acid, leading to the corresponding β-lactams in moderate to good yields. Preliminary studies indicate that the reaction undergoes a free radical mechanism via a Cu(i)/Cu(ii)/Cu(iii) catalytic cycle.
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Affiliation(s)
- Peng Shi
- Soochow University, College of Chemistry, Chemical Engineering and Materials Science, 199 Ren'ai Road, Suzhou, Jiangsu, China.
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28
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Pichette Drapeau M, Bahri J, Lichte D, Gooßen LJ. Decarboxylative ipso
Amination of Activated Benzoic Acids. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201812068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin Pichette Drapeau
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
| | - Janet Bahri
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
| | - Dominik Lichte
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
| | - Lukas J. Gooßen
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
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29
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Pichette Drapeau M, Bahri J, Lichte D, Gooßen LJ. Decarboxylative ipso
Amination of Activated Benzoic Acids. Angew Chem Int Ed Engl 2018; 58:892-896. [DOI: 10.1002/anie.201812068] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 11/16/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Martin Pichette Drapeau
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
| | - Janet Bahri
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
| | - Dominik Lichte
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
| | - Lukas J. Gooßen
- ZEMOS; Fakultät für Chemie und Biochemie; Ruhr-Universität Bochum; Universitätsstr. 150 44801 Bochum Germany
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30
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Matsuura R, Jankins TC, Hill DE, Yang KS, Gallego GM, Yang S, He M, Wang F, Marsters RP, McAlpine I, Engle KM. Palladium(ii)-catalyzed γ-selective hydroarylation of alkenyl carbonyl compounds with arylboronic acids. Chem Sci 2018; 9:8363-8368. [PMID: 30542583 PMCID: PMC6247822 DOI: 10.1039/c8sc03081b] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 08/31/2018] [Indexed: 12/31/2022] Open
Abstract
A catalytic γ-selective syn-hydroarylation of alkenyl carbonyl compounds using arylboronic acids has been developed using a substrate directivity approach with a palladium(ii) catalyst. This method tolerates a wide range of functionalized (hetero)arylboronic acids and a variety of substitution patterns on the alkene. Preliminary mechanistic studies suggest that transmetalation is rate-limiting.
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Affiliation(s)
- Rei Matsuura
- Department of Chemistry , The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla , California 92037 , USA .
| | - Tanner C Jankins
- Department of Chemistry , The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla , California 92037 , USA .
| | - David E Hill
- Department of Chemistry , The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla , California 92037 , USA .
| | - Kin S Yang
- Department of Chemistry , The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla , California 92037 , USA .
| | - Gary M Gallego
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , USA
| | - Shouliang Yang
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , USA
| | - Mingying He
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , USA
| | - Fen Wang
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , USA
| | - Rohan P Marsters
- Department of Chemistry , The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla , California 92037 , USA .
| | - Indrawan McAlpine
- Pfizer Oncology Medicinal Chemistry , 10770 Science Center Drive , San Diego , California 92121 , USA
| | - Keary M Engle
- Department of Chemistry , The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla , California 92037 , USA .
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31
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Honeycutt AP, Hoover JM. Nickel-Catalyzed Oxidative Decarboxylative Annulation for the Synthesis of Heterocycle-Containing Phenanthridinones. Org Lett 2018; 20:7216-7219. [PMID: 30394749 DOI: 10.1021/acs.orglett.8b03144] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A nickel-catalyzed oxidative decarboxylative annulation reaction of simple benzamides and (hetero)aromatic carboxylates has been developed. This reaction provides access to a large array of phenanthridinones and their heterocyclic analogues, highlighting the utility and versatility of oxidative decarboxylative coupling strategies for C-C bond formation.
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Affiliation(s)
- Aaron P Honeycutt
- C. Eugene Bennett Department of Chemistry , West Virginia University , Morgantown , West Virginia , United States
| | - Jessica M Hoover
- C. Eugene Bennett Department of Chemistry , West Virginia University , Morgantown , West Virginia , United States
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32
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Sambiagio C, Schönbauer D, Blieck R, Dao-Huy T, Pototschnig G, Schaaf P, Wiesinger T, Zia MF, Wencel-Delord J, Besset T, Maes BUW, Schnürch M. A comprehensive overview of directing groups applied in metal-catalysed C-H functionalisation chemistry. Chem Soc Rev 2018; 47:6603-6743. [PMID: 30033454 PMCID: PMC6113863 DOI: 10.1039/c8cs00201k] [Citation(s) in RCA: 1087] [Impact Index Per Article: 181.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Indexed: 12/20/2022]
Abstract
The present review is devoted to summarizing the recent advances (2015-2017) in the field of metal-catalysed group-directed C-H functionalisation. In order to clearly showcase the molecular diversity that can now be accessed by means of directed C-H functionalisation, the whole is organized following the directing groups installed on a substrate. Its aim is to be a comprehensive reference work, where a specific directing group can be easily found, together with the transformations which have been carried out with it. Hence, the primary format of this review is schemes accompanied with a concise explanatory text, in which the directing groups are ordered in sections according to their chemical structure. The schemes feature typical substrates used, the products obtained as well as the required reaction conditions. Importantly, each example is commented on with respect to the most important positive features and drawbacks, on aspects such as selectivity, substrate scope, reaction conditions, directing group removal, and greenness. The targeted readership are both experts in the field of C-H functionalisation chemistry (to provide a comprehensive overview of the progress made in the last years) and, even more so, all organic chemists who want to introduce the C-H functionalisation way of thinking for a design of straightforward, efficient and step-economic synthetic routes towards molecules of interest to them. Accordingly, this review should be of particular interest also for scientists from industrial R&D sector. Hence, the overall goal of this review is to promote the application of C-H functionalisation reactions outside the research groups dedicated to method development and establishing it as a valuable reaction archetype in contemporary R&D, comparable to the role cross-coupling reactions play to date.
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Affiliation(s)
- Carlo Sambiagio
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - David Schönbauer
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Remi Blieck
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Toan Dao-Huy
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Gerit Pototschnig
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Patricia Schaaf
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Thomas Wiesinger
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Muhammad Farooq Zia
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Joanna Wencel-Delord
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
, Université de Strasbourg
,
ECPM 25 Rue Becquerel
, 67087 Strasbourg
, France
| | - Tatiana Besset
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Bert U. W. Maes
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
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33
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Probst N, Grelier G, Dahaoui S, Alami M, Gandon V, Messaoudi S. Palladium(II)-Catalyzed Diastereoselective 2,3-Trans C(sp3)–H Arylation of Glycosides. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01617] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Nicolas Probst
- BioCIS, Université Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry 92290, France
| | - Gwendal Grelier
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, Gif-sur-Yvette 91198, France
| | - Slimane Dahaoui
- Cristallographie, Résonance Magnétique et Modélisations (CRM2), UMR UL-CNRS 7036, Faculté des Sciences et Technologies, Université de Lorraine, BP 70239, Boulevard des Aiguillettes, Vandœuvre-lès-Nancy 54506 Cedex, France
| | - Mouâd Alami
- BioCIS, Université Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry 92290, France
| | - Vincent Gandon
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Université Paris-Saclay, route de Saclay, Palaiseau 91128 Cedex, France
- Institut de Chimie Moléculaire et des Matériaux d’Orsay, CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay, Orsay 91405, France
| | - Samir Messaoudi
- BioCIS, Université Paris-Sud, CNRS, University Paris-Saclay, Châtenay-Malabry 92290, France
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34
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Antermite D, Affron DP, Bull JA. Regio- and Stereoselective Palladium-Catalyzed C(sp3)–H Arylation of Pyrrolidines and Piperidines with C(3) Directing Groups. Org Lett 2018; 20:3948-3952. [DOI: 10.1021/acs.orglett.8b01521] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Daniele Antermite
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Dominic P. Affron
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - James A. Bull
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
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35
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Verho O, Pourghasemi Lati M, Oschmann M. A Two-Step Procedure for the Overall Transamidation of 8-Aminoquinoline Amides Proceeding via the Intermediate N-Acyl-Boc-Carbamates. J Org Chem 2018; 83:4464-4476. [PMID: 29578345 DOI: 10.1021/acs.joc.8b00174] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Herein a two-step strategy for achieving overall transamidation of 8-aminoquinoline amides has been explored. In this protocol, the 8-aminoquinoline amides were first treated with Boc2O and DMAP to form the corresponding N-acyl-Boc-carbamates, which were found to be sufficiently reactive to undergo subsequent aminolysis with different amines in the absence of any additional reagents or catalysts. To demonstrate the utility of this approach, it was applied on a number of 8-aminoquinoline amides from the recent C-H functionalization literature, enabling access to a range of elaborate amide derivatives in good to high yields.
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Affiliation(s)
- Oscar Verho
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Monireh Pourghasemi Lati
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
| | - Michael Oschmann
- Department of Organic Chemistry, Arrhenius Laboratory , Stockholm University , SE-106 91 Stockholm , Sweden
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36
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Zhang Z, Zheng D, Wan Y, Zhang G, Bi J, Liu Q, Liu T, Shi L. Selective Cleavage of Inert Aryl C-N Bonds in N-Aryl Amides. J Org Chem 2018; 83:1369-1376. [PMID: 29302966 DOI: 10.1021/acs.joc.7b02880] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A highly selective, IBX-promoted reaction has been developed for the oxidative cleavage of inert C(aryl)-N bonds on secondary amides while leaving the C(carbonyl)-N bond unchanged. This metal-free reaction proceeds under mild conditions (HFIP/H2O, 25 °C), providing facile access to various useful primary amides, some of which would be otherwise unattainable using conventional aminolysis and hydrolysis approaches.
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Affiliation(s)
- Zhiguo Zhang
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China.,Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University , Jilin, Changchun 130024, China
| | - Dan Zheng
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Yameng Wan
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Jingjing Bi
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Qingfeng Liu
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Tongxin Liu
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
| | - Lei Shi
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, China
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37
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Tran CB, Duong XNT, Lu HD, Cao TTV, Truong T. Auxiliary-directed etherification of sp2 C–H bonds under heterogeneous metal–organic framework catalysis: synthesis of ethenzamide. RSC Adv 2018; 8:2829-2836. [PMID: 35541499 PMCID: PMC9077472 DOI: 10.1039/c7ra12010a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 12/18/2017] [Indexed: 11/21/2022] Open
Abstract
An efficient protocol for 8-aminoquinoline assisted alkoxylation and phenoxylation of sp2 C–H bonds under heterogeneous catalysis was developed. The optimal conditions employed Cu-MOF-74 (20%), K2CO3 base, pyridine ligand or dimethyl formamide solvent, and O2 oxidant at 80 °C or 100 °C for 24 hours. Cu-MOF-74 revealed remarkably higher activity when compared with other previously commonly used Cu-MOFs in cross coupling reactions, supported copper catalysts, and homogeneous copper salts. The reaction scope with respect to coupling partners included a wide range of various substrates. Interestingly, the developed conditions are applicable for the synthesis of high-profile relevant biological agents from easily accessible starting materials. Furthermore, a leaching test confirmed the reaction heterogeneity and the catalyst was reused and recycled at least 8 times with trivial degradation in activity. An efficient protocol for 8-aminoquinoline assisted alkoxylation and phenoxylation of sp2 C–H bonds under heterogeneous catalysis was developed.![]()
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Affiliation(s)
- Chau B. Tran
- Department of Chemical Engineering
- Ho Chi Minh University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Xuan N. T. Duong
- Department of Chemical Engineering
- Ho Chi Minh University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Huy D. Lu
- Department of Chemical Engineering
- Ho Chi Minh University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Thu T. V. Cao
- Department of Chemical Engineering
- Ho Chi Minh University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Thanh Truong
- Department of Chemical Engineering
- Ho Chi Minh University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
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38
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St John-Campbell S, Bull JA. Transient imines as ‘next generation’ directing groups for the catalytic functionalisation of C–H bonds in a single operation. Org Biomol Chem 2018; 16:4582-4595. [DOI: 10.1039/c8ob00926k] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review describes recent developments in the use of catalytic transient directing groups, through imine linkages, which in combination with transition metal catalysts provide streamlined C–H functionalisation processes.
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Affiliation(s)
| | - James A. Bull
- Department of Chemistry
- Imperial College London
- South Kensington
- London
- UK
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39
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Obata A, Ano Y, Chatani N. Nickel-catalyzed C-H/N-H annulation of aromatic amides with alkynes in the absence of a specific chelation system. Chem Sci 2017; 8:6650-6655. [PMID: 28989692 PMCID: PMC5625264 DOI: 10.1039/c7sc01750b] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 07/24/2017] [Indexed: 11/21/2022] Open
Abstract
The Ni-catalyzed reaction of aromatic amides with alkynes in the presence of KOBu t involves C-H/N-H oxidative annulation to give 1(2H)-isoquinolinones. A key to the success of the reaction is the use of a catalytic amount of strong base, such as KOBu t . The reaction shows a high functional group compatibility. The reaction with unsymmetrical alkynes, such as 1-arylalkynes, gives the corresponding 1(2H)-isoquinolinones with a high level of regioselectivity. This discovery would lead to the development of Ni-catalyzed chelation-assisted C-H functionalization reactions without the need for a specific chelation system.
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Affiliation(s)
- Atsushi Obata
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan
| | - Yusuke Ano
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan
| | - Naoto Chatani
- Department of Applied Chemistry , Faculty of Engineering , Osaka University , Suita , Osaka 565-0871 , Japan
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40
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Thrimurtulu N, Dey A, Pal K, Nair A, Kumar S, Volla CMR. Metal-Free Remote C-H Bond Acetoxylation of 8-Aminoquinolines on the C5-Position. ChemistrySelect 2017. [DOI: 10.1002/slct.201701388] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Neetipalli Thrimurtulu
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400076 India
| | - Arnab Dey
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400076 India
| | - Kuntal Pal
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400076 India
| | - Akshay Nair
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400076 India
| | - Shreemoyee Kumar
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400076 India
| | - Chandra M. R. Volla
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400076 India
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41
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Verho O, Maetani M, Melillo B, Zoller J, Schreiber SL. Stereospecific Palladium-Catalyzed C–H Arylation of Pyroglutamic Acid Derivatives at the C3 Position Enabled by 8-Aminoquinoline as a Directing Group. Org Lett 2017; 19:4424-4427. [DOI: 10.1021/acs.orglett.7b01776] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Oscar Verho
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Broad Institute, Cambridge, Massachusetts 02142, United States
| | - Micah Maetani
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Broad Institute, Cambridge, Massachusetts 02142, United States
| | - Bruno Melillo
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Broad Institute, Cambridge, Massachusetts 02142, United States
| | - Jochen Zoller
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Broad Institute, Cambridge, Massachusetts 02142, United States
| | - Stuart L. Schreiber
- Department of Chemistry and
Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Broad Institute, Cambridge, Massachusetts 02142, United States
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42
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Parella R, Babu SA. Pd(II)-Catalyzed Arylation and Intramolecular Amidation of γ-C(sp3)–H Bonds: En Route to Arylheteroarylmethane and Pyrrolidone Ring Annulated Furan/Thiophene Scaffolds. J Org Chem 2017; 82:7123-7150. [DOI: 10.1021/acs.joc.7b00582] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ramarao Parella
- Department Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Manauli P.O., Mohali, Punjab 140306, India
| | - Srinivasarao Arulananda Babu
- Department Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge
City, Sector 81, SAS Nagar, Manauli P.O., Mohali, Punjab 140306, India
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43
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Parella R, Babu SA. Pd(II)-Catalyzed, Picolinamide-Assisted, Z-Selective γ-Arylation of Allylamines To Construct Z-Cinnamylamines. J Org Chem 2017; 82:6550-6567. [DOI: 10.1021/acs.joc.7b00535] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ramarao Parella
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Manauli P.O., Sector 81, SAS Nagar, Knowledge City, Mohali, Punjab 140306, India
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Manauli P.O., Sector 81, SAS Nagar, Knowledge City, Mohali, Punjab 140306, India
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44
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St John-Campbell S, White AJP, Bull JA. Single operation palladium catalysed C(sp 3)-H functionalisation of tertiary aldehydes: investigations into transient imine directing groups. Chem Sci 2017; 8:4840-4847. [PMID: 28959406 PMCID: PMC5603794 DOI: 10.1039/c7sc01218g] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 04/30/2017] [Indexed: 01/17/2023] Open
Abstract
Mono and bidentate amine directing groups formed transiently though imine linkages promote C–H arylation of tertiary aldehydes.
Simple amine and diamine derivatives can promote the palladium catalysed direct β-C–H arylation of aliphatic aldehydes via transient imine formation. Trifluoroacetate was shown to be crucial in promoting the reaction. Sub-stoichiometric quantities of simple N-tosylethylenediamine was shown to form a bidentate directing group with an imine linkage. Isolation of an unsymmetrical palladacycle has shown different potential binding modes of the secondary NTs coordinating group by single crystal X-ray diffraction analysis, suggestive of a hemilabile ligand.
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Affiliation(s)
- S St John-Campbell
- Department of Chemistry , Imperial College London , South Kensington , London , SW7 2AZ , UK .
| | - A J P White
- Department of Chemistry , Imperial College London , South Kensington , London , SW7 2AZ , UK .
| | - J A Bull
- Department of Chemistry , Imperial College London , South Kensington , London , SW7 2AZ , UK .
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45
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Deguchi T, Xin HL, Morimoto H, Ohshima T. Direct Catalytic Alcoholysis of Unactivated 8-Aminoquinoline Amides. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00442] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Toru Deguchi
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
| | - Hai-Long Xin
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
| | - Hiroyuki Morimoto
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
| | - Takashi Ohshima
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka, Japan, 812-8582
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46
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Synthesis and antimicrobial evaluation of novel analogues of dehydroabietic acid prepared by C H-Activation. Eur J Med Chem 2017; 126:937-943. [DOI: 10.1016/j.ejmech.2016.12.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 12/02/2016] [Accepted: 12/03/2016] [Indexed: 11/21/2022]
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