1
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Dong K, Wu T, Wang M, Lin L. Spirobipyridine Ligand Enabled Iridium-Catalyzed Site-Selective C-H Activation via Non-Covalent Interactions. Angew Chem Int Ed Engl 2024; 63:e202411158. [PMID: 39008194 DOI: 10.1002/anie.202411158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/15/2024] [Accepted: 07/15/2024] [Indexed: 07/16/2024]
Abstract
The selective borylation of specific C-H bonds in organic synthesis remains a formidable challenge. In this study, we present a novel spirobipyridine ligand that features a binaphthyl backbone. This ligand facilitates the iridium-catalyzed selective C-H borylation of benzene derivatives. The ligand is designed with "side-arm-wall" substituents that allow vicinal di- or multi-substituted benzene derivatives to approach metal center and effectively block other reactive sites by non-covalent interactions with substrates. The effectiveness of this strategy is demonstrated by the successful selective distal C-H activation of various alkaloids and its broad compatibility with functional groups.
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Affiliation(s)
- Kun Dong
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Tianbao Wu
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Luqing Lin
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning, 116024, China
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2
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Guria S, Hassan MMM, Dey S, Singh KN, Chattopadhyay B. Sterically Controlled Lewis Acid-Base Interaction Toward para-Selective Borylation of Aromatic Aldimines and Benzylamines. Angew Chem Int Ed Engl 2024; 63:e202409010. [PMID: 39012678 DOI: 10.1002/anie.202409010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/15/2024] [Accepted: 07/16/2024] [Indexed: 07/17/2024]
Abstract
Site-selective C-H bond functionalization of arenes at the para position remains extremely challenging primarily due to its relative inaccessibility from the catalytic site. As a consequence, it is significantly restricted to limited molecular scaffolds. Herein, we report a method for the para-C-H borylation of aromatic aldimines and benzylamines using commercially available ligands under iridium catalysis. The established method displays excellent para selectivity for variously substituted aromatic aldimines, benzylamines and bioactive molecules. Based on several control experiments, it is proposed that a Lewis acid-base interaction between the nitrogen and boron functionality guides the para selectivity via a steric shield for the aromatic aldimines, where Bpin acts as a transient directing group. However, the steric shield of the in situ generated N-Bpin moiety controlled the overall selectivity for the para borylation of benzylamines.
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Affiliation(s)
- Saikat Guria
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Mirja Md Mahamudul Hassan
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Sayan Dey
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Krishna Nand Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Buddhadeb Chattopadhyay
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
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3
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Tang J, Huang J, Li G, Liu Z, He S, Jin Z. Palladium-Catalyzed para-Selective C-H Olefination and Acetoxylation of Benzylamines Enabled by an Unmasked Benzoyl Template. Org Lett 2024; 26:6109-6113. [PMID: 39023060 DOI: 10.1021/acs.orglett.4c01785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Benzylamines belong to an important class of building blocks in the synthesis of biologically active natural products and drugs. Encumbered by amide-directed ortho-C-H activation, remote para-selective C-H functionalization of benzylamines has hitherto not been realized to date. Here, we report a palladium-catalyzed para-selective C-H olefination and acetoxylation of benzylamines using a functionalized benzoyl template. Enhancing the coordination strength of the directing group in the template significantly improved the site selectivity of C-H functionalization.
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Affiliation(s)
- Jinghong Tang
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University, Kashgar, Xinjiang 844000, People's Republic of China
| | - Jun Huang
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University, Kashgar, Xinjiang 844000, People's Republic of China
| | - Guoshuai Li
- College of Chemistry, National Engineering Research Center of Pesticide, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Zelin Liu
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University, Kashgar, Xinjiang 844000, People's Republic of China
| | - Siquan He
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University, Kashgar, Xinjiang 844000, People's Republic of China
| | - Zhong Jin
- Key Laboratory of Xinjiang Native Medicinal and Edible Plant Resource Chemistry, College of Chemistry and Environmental Sciences, Kashi University, Kashgar, Xinjiang 844000, People's Republic of China
- College of Chemistry, National Engineering Research Center of Pesticide, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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4
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Alshehri JA, Jones AM. Chemical approaches to the sulfation of small molecules: current progress and future directions. Essays Biochem 2024:EBC20240001. [PMID: 38958528 DOI: 10.1042/ebc20240001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/07/2024] [Accepted: 06/18/2024] [Indexed: 07/04/2024]
Abstract
Sulfation is one of the most important modifications that occur to a wide range of bioactive small molecules including polysaccharides, proteins, flavonoids, and steroids. In turn, these sulfated molecules have significant biological and pharmacological roles in diverse processes including cell signalling, modulation of immune and inflammation response, anti-coagulation, anti-atherosclerosis, and anti-adhesive properties. This Essay summarises the most encountered chemical sulfation methods of small molecules. Sulfation reactions using sulfur trioxide amine/amide complexes are the most used method for alcohol and phenol groups in carbohydrates, steroids, proteins, and related scaffolds. Despite the effectiveness of these methods, they suffer from issues including multiple-purification steps, toxicity issues (e.g., pyridine contamination), purification challenges, stoichiometric excess of reagents which leads to an increase in reaction cost, and intrinsic stability issues of both the reagent and product. Recent advances including SuFEx, the in situ reagent approach, and TBSAB show the widespread appeal of novel sulfating approaches that will enable a larger exploration of the field in the years to come by simplifying the purification and isolation process to access bespoke sulfated small molecules.
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Affiliation(s)
- Jaber A Alshehri
- School of Pharmacy, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
| | - Alan M Jones
- School of Pharmacy, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
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5
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Peruzzi C, Miller SL, Dannatt JE, Ghaffari B, Maleczka RE, Smith MR. A Hydrazone Ligand for Iridium-Catalyzed C-H Borylation: Enhanced Reactivity and Selectivity for Fluorinated Arenes. Organometallics 2024; 43:1208-1212. [PMID: 38873573 PMCID: PMC11167643 DOI: 10.1021/acs.organomet.4c00174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/10/2024] [Accepted: 05/15/2024] [Indexed: 06/15/2024]
Abstract
Ir-catalyzed C-H borylations of fluorinated and cyanated arenes with high meta-to-F/CN are described. Use of a dipyridyl hydrazone framework as the ancillary ligand and pinacolborane (HBpin) as the functionalizing reagent generates catalysts that are significantly more active and selective than 4,4'-di-tert-butyl-2,2'-bipyridine (dtbpy) for both electron-deficient and electron-rich substrates. Investigation of the ligand framework resulted in the observation of formal N-borylation of the hydrazone by HBpin, as evidenced by NMR spectroscopy and X-ray crystallography. Subsequent stoichiometric reactions of this adduct with an iridium precatalyst revealed the formation of an unusual IrI hydrazido. Isolation and use of this hydrazido reproduce the selectivity of in situ generated catalysts, suggesting that it leads to formation of the active species.
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Affiliation(s)
- Christopher
D. Peruzzi
- Department
of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
| | - Susanne L. Miller
- Department
of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
| | - Jonathan E. Dannatt
- Department
of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
- Department
of Chemistry, University of Dallas, 1845 East Northgate Drive, Irving, Texas 75062, United States
| | - Behnaz Ghaffari
- Department
of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
| | - Robert E. Maleczka
- Department
of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
| | - Milton R. Smith
- Department
of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
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6
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Wen Y, Jin HX, Qiu YH, Zong Y, Luo W, Chen Z, Yu D. Photo-induced tungsten-catalyzed cascade synthesis of pyrrolo[2,1- a]isoquinoline-1,3-dicarboxylate and its reaction mechanism. Chem Commun (Camb) 2024; 60:4573-4576. [PMID: 38572995 DOI: 10.1039/d4cc00169a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
A pyrrolo[2,1-a]isoquinoline core structure is prevalent in marine and other natural products. This article describes a tungsten-catalyzed [3+2] cycloaddition aromatization of dihydroisoquinoline ester and maleic anhydride or an acrylate. The photochemical reaction tolerates a range of functional groups such as ester, cyano, ketone, bromide, and alkene. It is shown that the cycloaddition-aromatization of 2-substitued acrylate catalyzed by a tungsten photocatalyst can be used to evaluate the leaving ability of the leaving group. Experiments done to determine the reaction mechanism revealed that the formation of an ion-pair intermediate generated in situ from dihydroisoquinoline ester and (Z)-4-methoxy-4-oxobut-2-enoic acid via the solvolysis of maleic anhydride with methanol is crucial for the cascade process to occur. The key cycloadduct acid intermediate derived from [3+2] cycloaddition was isolated and determined by X-ray crystallography.
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Affiliation(s)
- Yongshun Wen
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Hong-Xian Jin
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Yan-Hua Qiu
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Yingtong Zong
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Wenjun Luo
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Zhengwang Chen
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
| | - Daohong Yu
- Key laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China.
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7
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Li M, Deng YH, Chang Q, Li J, Wang C, Wang L, Sun TY. Photoinduced Site-Selective Aryl C-H Borylation with Electron-Donor-Acceptor Complex Derived from B 2Pin 2 and Isoquinoline. Molecules 2024; 29:1783. [PMID: 38675603 PMCID: PMC11052414 DOI: 10.3390/molecules29081783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/08/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Due to boron's metalloid properties, aromatic boron reagents are prevalent synthetic intermediates. The direct borylation of aryl C-H bonds for producing aromatic boron compounds offers an appealing, one-step solution. Despite significant advances in this field, achieving regioselective aryl C-H bond borylation using simple and readily available starting materials still remains a challenge. In this work, we attempted to enhance the reactivity of the electron-donor-acceptor (EDA) complex by selecting different bases to replace the organic base (NEt3) used in our previous research. To our delight, when using NH4HCO3 as the base, we have achieved a mild visible-light-mediated aromatic C-H bond borylation reaction with exceptional regioselectivity (rr > 40:1 to single isomers). Compared with our previous borylation methodologies, this protocol provides a more efficient and broader scope for aryl C-H bond borylation through the use of N-Bromosuccinimide. The protocol's good functional-group tolerance and excellent regioselectivity enable the functionalization of a variety of biologically relevant compounds and novel cascade transformations. Mechanistic experiments and theoretical calculations conducted in this study have indicated that, for certain arenes, the aryl C-H bond borylation might proceed through a new reaction mechanism, which involves the formation of a novel transient EDA complex.
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Affiliation(s)
- Manhong Li
- Key Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China; (M.L.); (Y.-H.D.); (C.W.)
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, No. 66, Gongchang Road, Shenzhen 518107, China;
- Institute of Molecular Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
- Department of Pharmacy and Pharmaceutical Sciences, Faculty of Science, National University of Singapore, Block S4A, Level 3, 18 Science Drive 4, Singapore 117543, Singapore
| | - Yi-Hui Deng
- Key Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China; (M.L.); (Y.-H.D.); (C.W.)
| | - Qianqian Chang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, No. 66, Gongchang Road, Shenzhen 518107, China;
| | - Jinyuan Li
- Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China;
| | - Chao Wang
- Key Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China; (M.L.); (Y.-H.D.); (C.W.)
| | - Leifeng Wang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, No. 66, Gongchang Road, Shenzhen 518107, China;
| | - Tian-Yu Sun
- Key Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China; (M.L.); (Y.-H.D.); (C.W.)
- Institute of Molecular Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
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8
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Docherty P, Kadarauch M, Mistry N, Phipps RJ. Application of sSPhos as a Chiral Ligand for Palladium-Catalyzed Asymmetric Allylic Alkylation. Org Lett 2024; 26:2862-2866. [PMID: 38147571 PMCID: PMC11020163 DOI: 10.1021/acs.orglett.3c04025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 12/28/2023]
Abstract
Palladium-catalyzed asymmetric allylic alkylation is a versatile method for C-C bond formation. Many established classes of chiral ligands can perform allylic alkylation reactions enantioselectively, but identification of new ligand classes remains important for future development of the field. We demonstrate that enantiopure sSPhos, a bifunctional chiral monophosphine ligand, when used as its tetrabutyl ammonium salt, is a highly effective ligand for a benchmark Pd-catalyzed allylic alkylation reaction. We explore the scope and limitations and perform experiments to probe the origin of selectivity. In contrast with reactions previously explored using enantiopure sSPhos, it appears that steric bulk around the sulfonate group is responsible for the high enantioselectivity in this case, rather than attractive noncovalent interactions.
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Affiliation(s)
- Philip
J. Docherty
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Max Kadarauch
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Nisha Mistry
- Drug
Substance Development, GSK, Stevenage SG1 2NY, U.K.
| | - Robert J. Phipps
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
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9
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Ju G, Huang Z, Zhao Y. Trialkoxysilane-Induced Iridium-Catalyzed para-Selective C-H Bond Borylation of Arenes. Nat Commun 2024; 15:2847. [PMID: 38565860 PMCID: PMC10987550 DOI: 10.1038/s41467-024-47205-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 03/22/2024] [Indexed: 04/04/2024] Open
Abstract
An ideal approach for the construction of aryl boron compounds is to selectively replace a C-H bond in arenes with a C-B bond, and controlling regioselectivity is one of the most challenging aspects of these transformations. Herein, we report an iridium-catalyzed trialkoxysilane protecting group-assisted regioselective C-H borylation of arenes, including derivatives of benzaldehydes, acetophenones, benzoic acids, benzyl alcohols, phenols, aryl silanes, benzyl silanes, and multi-functionalized aromatic rings are all well tolerated and gave the para -selective C-H borylation products in a short time without the requirement of inert gases atmosphere. The site-selective C-H borylation can be adjustable by installing the developed trialkoxysilane protecting group on different functional groups on one aromatic ring. Importantly, the preparation process of the trialkoxychlorosilane is efficient and scalable. Mechanistic and computational studies reveal that the steric hindrance of the trialkoxysilane protecting group plays a key role in dictating the para-selectivity.
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Affiliation(s)
- Guodong Ju
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Zhibin Huang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453000, China.
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10
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Zhou Y, Jones AM. Rearrangement of Arylsulfamates and Sulfates to Para-Sulfonyl Anilines and Phenols. Molecules 2024; 29:1445. [PMID: 38611725 PMCID: PMC11013102 DOI: 10.3390/molecules29071445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/16/2024] [Accepted: 03/18/2024] [Indexed: 04/14/2024] Open
Abstract
The C(sp2)-aryl sulfonate functional group is found in bioactive molecules, but their synthesis can involve extreme temperatures (>190 °C or flash vacuum pyrolysis) and strongly acidic reaction conditions. Inspired by the 1917 Tyrer industrial process for a sulfa dye that involved an aniline N(sp2)-SO3 intermediate en route to a C(sp2)-SO3 rearranged product, we investigated tributylsulfoammonium betaine (TBSAB) as a milder N-sulfamation to C-sulfonate relay reagent. Initial investigations of a stepwise route involving TBSAB on selected anilines at room temperature enabled the isolation of N(sp2)-sulfamate. Subsequent thermal rearrangement demonstrated the intermediary of a sulfamate en route to the sulfonate; however, it was low-yielding. Investigation of the N-sulfamate to C--sulfonate mechanism through control experiments with variation at the heteroatom positions and kinetic isotope experiments (KIEH/D) confirmed the formation of a key N(sp2)-SO3 intermediate and further confirmed an intermolecular mechanism. Furthermore, compounds without an accessible nitrogen (or oxygen) lone pair did not undergo sulfamation- (or sulfation) -to-sulfonation under these conditions. A one-pot sulfamation and thermal sulfonation reaction was ultimately developed and explored on a range of aniline and heterocyclic scaffolds with high conversions, including N(sp2)-sulfamates (O(sp2)-sulfates) and C(sp2)-sulfonates, in up to 99 and 80% (and 88% for a phenolic example) isolated yield, respectively. Encouragingly, the ability to modulate the ortho-para selectivity of the products obtained was observed under thermal control. A sulfonated analog of the intravenous anesthetic propofol was isolated (88% yield), demonstrating a proof-of-concept modification of a licensed drug alongside a range of nitrogen- and sulfur-containing heterocyclic fragments used in drug discovery.
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Affiliation(s)
| | - Alan M. Jones
- School of Pharmacy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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11
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Guria S, Hassan MMM, Ma J, Dey S, Liang Y, Chattopadhyay B. A tautomerized ligand enabled meta selective C-H borylation of phenol. Nat Commun 2023; 14:6906. [PMID: 37903772 PMCID: PMC10616221 DOI: 10.1038/s41467-023-42310-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 10/06/2023] [Indexed: 11/01/2023] Open
Abstract
Remote meta selective C-H functionalization of aromatic compounds remains a challenging problem in chemical synthesis. Here, we report an iridium catalyst bearing a bidentate pyridine-pyridone (PY-PYRI) ligand framework that efficiently catalyzes this meta selective borylation reaction. We demonstrate that the developed concept can be employed to introduce a boron functionality at the remote meta position of phenols, phenol containing bioactive and drug molecules, which was an extraordinary challenge. Moreover, we have demonstrated that the method can also be applied for the remote C6 borylation of indole derivatives including tryptophan that was the key synthetic precursor for the total synthesis of Verruculogen and Fumitremorgin A alkaloids. The inspiration of this catalytic concept was started from the O-Si secondary interaction, which by means of several more detailed control experiments and detailed computational investigations revealed that an unprecedented Bpin shift occurs during the transformation of iridium bis(boryl) complex to iridium tris(boryl) complex, which eventually control the remote meta selectivity by means of the dispersion between the designed ligand and steering silane group.
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Affiliation(s)
- Saikat Guria
- Department of Biological & Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Mirja Md Mahamudul Hassan
- Department of Biological & Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Jiawei Ma
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Sayan Dey
- Department of Biological & Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China.
| | - Buddhadeb Chattopadhyay
- Department of Biological & Synthetic Chemistry, Centre of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India.
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12
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Li CY, Zhang Z, Yan X. Ir-Catalyzed Ortho-Selective C-H Borylation of Difluoromethyl Arenes. Org Lett 2023; 25:7278-7282. [PMID: 37782225 DOI: 10.1021/acs.orglett.3c02308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
The difluoromethyl group (CF2H) has received great attention due to its distinct properties in recent years. Herein, we report a new strategy for postmodification of difluoromethyl compounds. Ortho-selective C-H borylation of difluoromethyl arenes is achieved by a cyclometalated mesoionic carbene-Ir complex. The regioselectivity is controlled by a hydrogen bond between CF2H and the boryl group via the outer-sphere direction.
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Affiliation(s)
- Chen-Yuan Li
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Zengyu Zhang
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xiaoyu Yan
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
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13
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Hassan MMM, Guria S, Dey S, Das J, Chattopadhyay B. Transition metal-catalyzed remote C─H borylation: An emerging synthetic tool. SCIENCE ADVANCES 2023; 9:eadg3311. [PMID: 37083526 PMCID: PMC10121176 DOI: 10.1126/sciadv.adg3311] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 03/22/2023] [Indexed: 05/03/2023]
Abstract
Transition metal-catalyzed C─H bond activation and borylation is a powerful synthetic method that offers versatile synthetic transformation from organoboron compounds to virtually all other functional groups. Compared to the ortho-borylation, remote borylation remains more challenging owing to the inaccessibility of these C─H bonds. Enforcing the metal catalyst toward the remote C─H bonds needs well-judged catalyst design through proper ligand development. This review article aims to summarize the recent discoveries for the remote C─H borylation by the employment of new catalyst/ligand design with the help of steric of the ligand, noncovalent interactions. It has been found that C─H borylation now takes part in the total synthesis of natural products in a shorter route. Whereas, Ir-catalyzed C─H borylation is predominant, cobalt catalyst has also started to affect this field for sustainable and cost-effective development.
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Affiliation(s)
- Mirja Md Mahamudul Hassan
- Department of Biological and Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Saikat Guria
- Department of Biological and Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Sayan Dey
- Department of Biological and Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Jaitri Das
- Department of Biological and Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Buddhadeb Chattopadhyay
- Department of Biological and Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
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14
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Kim S, Treacy JW, Nelson YA, Gonzalez JAM, Gembicky M, Houk KN, Spokoyny AM. Arene C-H borylation strategy enabled by a non-classical boron cluster-based electrophile. Nat Commun 2023; 14:1671. [PMID: 36966132 PMCID: PMC10039867 DOI: 10.1038/s41467-023-37258-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 03/08/2023] [Indexed: 03/27/2023] Open
Abstract
Introducing a tri-coordinate boron-based functional group (e.g., boronic ester) into an unactivated C-H bond in the absence of directing groups is an ongoing challenge in synthetic chemistry. Despite previous developments in transition metal-catalyzed and -free approaches, C-H borylation of sterically hindered arenes remains a largely unsolved problem to date. Here, we report a synthetic strategy of a two-step, precious metal-free electrophilic C-H borylation of sterically hindered alkyl- and haloarenes to generate aryl boronic esters. The first step relies on electrophilic aromatic substitution (EAS) induced by cage-opening of Cs2[closo-B10H10], forming a 6-Ar-nido-B10H13 product containing a B-C bond, followed by a cage deconstruction of arylated decaboranes promoted by diols. The combination of these two steps allows for the preparation of aryl boronic esters that are hardly accessible by current direct C-H borylation approaches. This reaction does not require any precious metals, highly-engineered ligands, pre-functionalized boron reagents, or inert conditions. In addition, the unique properties of a non-classical boron cluster electrophile intermediate, B10H13+, afford a regioselectivity with unique steric and electronic control without the undesirable side reactions.
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Affiliation(s)
- Sangmin Kim
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Joseph W Treacy
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Yessica A Nelson
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jordan A M Gonzalez
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Milan Gembicky
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
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15
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Marcos-Atanes D, Vidal C, Navo CD, Peccati F, Jiménez-Osés G, Mascareñas JL. Iridium-Catalyzed ortho-Selective Borylation of Aromatic Amides Enabled by 5-Trifluoromethylated Bipyridine Ligands. Angew Chem Int Ed Engl 2023; 62:e202214510. [PMID: 36602092 DOI: 10.1002/anie.202214510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 01/06/2023]
Abstract
Iridium-catalyzed borylations of aromatic C-H bonds are highly attractive transformations because of the diversification possibilities offered by the resulting boronates. These transformations are best carried out using bidentate bipyridine or phenanthroline ligands, and tend to be governed by steric factors, therefore resulting in the competitive functionalization of meta and/or para positions. We have now discovered that a subtle change in the bipyridine ligand, namely, the introduction of a CF3 substituent at position 5, enables a complete change of regioselectivity in the borylation of aromatic amides, allowing the synthesis of a wide variety of ortho-borylated derivatives. Importantly, thorough computational studies suggest that the exquisite regio- and chemoselectivity stems from unusual outer-sphere interactions between the amide group of the substrate and the CF3 -substituted aryl ring of the bipyridine ligand.
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Affiliation(s)
- Daniel Marcos-Atanes
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
| | - Cristian Vidal
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
| | - Claudio D Navo
- CIC bioGUNE, Basque Research and Technology Alliance, BRTA, Bizkaia Technology Park, 48162, Derio, Spain
| | - Francesca Peccati
- CIC bioGUNE, Basque Research and Technology Alliance, BRTA, Bizkaia Technology Park, 48162, Derio, Spain
| | - Gonzalo Jiménez-Osés
- CIC bioGUNE, Basque Research and Technology Alliance, BRTA, Bizkaia Technology Park, 48162, Derio, Spain.,Ikerbasque, Basque Foundation for Science, 48013, Bilbao, Spain
| | - José L Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain
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16
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Non-covalent interactions in transition metal-catalyzed para-selective C H functionalization of arenes. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2023. [DOI: 10.1016/bs.adomc.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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17
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Tan X, Wang X, Li ZH, Wang H. Borenium-Ion-Catalyzed C-H Borylation of Arenes. J Am Chem Soc 2022; 144:23286-23291. [PMID: 36524876 DOI: 10.1021/jacs.2c12151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Non-metal-catalyzed C-H borylation of arenes represents a sustainable and environment-friendly approach for the functionalization of arenes. Despite its promise as an alternative to traditional transition-metal systems, its substrate scope is generally limited to electron-rich arenes, thus hindering its application in organic synthesis. Herein, we report the development of a borenium-ion catalyst which can borylate unactivated arenes under ambient conditions with 4-chlorocatecholborane (HBcatCl) as borylation reagent. This metal-free catalytic system is suitable for the borylation of C-H bonds in sterically encumbered positions, which has been a challenging task for transition-metal systems. Additionally, this catalytic system allows para-selective one-pot borylation of phenols, which has not been achieved by using transition-metal systems. Our mechanistic investigations and computational studies support a synergistic activation of the H-BcatCl bond by the arene substrate and the borenium-ion catalyst. This generates a Wheland intermediate and a neutral hydroborane species and is followed by deprotonation of the Wheland intermediate with the hydroborane species. The latter step of C-H bond cleavage is likely the rate-limiting step.
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Affiliation(s)
- Xinyue Tan
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Songhu Road 2005, Shanghai 200438, China
| | - Xi Wang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Songhu Road 2005, Shanghai 200438, China
| | - Zhen Hua Li
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Songhu Road 2005, Shanghai 200438, China
| | - Huadong Wang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Songhu Road 2005, Shanghai 200438, China
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18
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Haldar C, Bisht R, Chaturvedi J, Guria S, Hassan MMM, Ram B, Chattopadhyay B. Ligand- and Substrate-Controlled para C–H Borylation of Anilines at Room Temperature. Org Lett 2022; 24:8147-8152. [DOI: 10.1021/acs.orglett.2c03188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Chabush Haldar
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Ranjana Bisht
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Jagriti Chaturvedi
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Saikat Guria
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Mirja Md Mahamudul Hassan
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
| | - Bali Ram
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Buddhadeb Chattopadhyay
- Department of Biological & Synthetic Chemistry, Center of Biomedical Research, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India
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19
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Gillespie J, Fanourakis A, Phipps RJ. Strategies That Utilize Ion Pairing Interactions to Exert Selectivity Control in the Functionalization of C-H Bonds. J Am Chem Soc 2022; 144:18195-18211. [PMID: 36178308 PMCID: PMC9562467 DOI: 10.1021/jacs.2c08752] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Indexed: 11/30/2022]
Abstract
Electrostatic attraction between two groups of opposite charge, typically known as ion-pairing, offers unique opportunities for the design of systems to enable selectivity control in chemical reactions. Catalysis using noncovalent interactions is an established and vibrant research area, but it is noticeable that hydrogen bonding interactions are still the main interaction of choice in system design. Opposite charges experience the powerful force of Coulombic attraction and have the ability to exert fundamental influence on the outcome of reactions that involve charged reagents, intermediates or catalysts. In this Perspective, we will examine how ion-pairing interactions have been used to control selectivity in C-H bond functionalization processes. This broad class of reactions provides an interesting and thought-provoking lens through which to examine the application of ion-pairing design strategies because it is one that encompasses great mechanistic diversity, poses significant selectivity challenges, and perhaps most importantly is of immense interest to synthetic chemists in both industry and academia. We survey reactions that proceed via radical and ionic mechanisms alongside those that involve transition metal catalysis and will deal with control of site-selectivity and enantioselectivity. We anticipate that as this emerging area develops, it will become an ever-more important design strategy for selectivity control.
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Affiliation(s)
| | | | - Robert J. Phipps
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
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20
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Frédéric L, Fabri B, Guénée L, Zinna F, Di Bari L, Lacour J. Triple Regioselective Functionalization of Cationic [4]Helicenes via Iridium-Catalyzed Borylation and Suzuki Cross-Coupling Reactivity. Chemistry 2022; 28:e202201853. [PMID: 35796630 DOI: 10.1002/chem.202201853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Indexed: 01/07/2023]
Abstract
In essentially one-pot, using Ir- and Pd-catalysis, tris(arene)-functionalized cationic [4]helicenes are synthesized with full regioselectivity and enantiospecificity starting from a trivial precursor (17 examples). This poly-addition of aryl groups improves key optical properties, that is, fluorescence quantum yields and lifetimes. Electronic circular dichroism and circularly polarized luminescence signatures are observed up to the far-red domain, in particular with additional arenes prone to aggregation.
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Affiliation(s)
- Lucas Frédéric
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Bibiana Fabri
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Laure Guénée
- Laboratoire de Cristallographie, University of Geneva, Quai Ernest Ansermet 24, 1211, Geneva 4, Switzerland
| | - Francesco Zinna
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Via G. Moruzzi 13, Pisa, Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Via G. Moruzzi 13, Pisa, Italy
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
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21
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Li B, Wang K, Yue H, Drichel A, Lin J, Su Z, Rueping M. Catalyst-Free C(sp 2)-H Borylation through Aryl Radical Generation from Thiophenium Salts via Electron Donor-Acceptor Complex Formation. Org Lett 2022; 24:7434-7439. [PMID: 36191259 DOI: 10.1021/acs.orglett.2c03008] [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
Aryl borates lie at the heart of carbon-carbon bond couplings, and they are widely applied to the synthesis of functional materials, pharmaceutical compounds, and natural products. Currently, synthetic methods for aryl borates are mostly limited to metal-catalyzed routes, and nonmetallic strategies remain comparatively underdeveloped. Herein, we report a mild, scalable, visible-light-induced cross-coupling between aryl dibenzothiophenium triflate salts and bis(catecholato)-diboron for the construction of C-B bonds in the absence of base, transition metal-ligand complex, or photoredox catalyst. Mechanistic studies reveal that this transformation is achieved through an electron donor-acceptor (EDA) complex activation in the absence of a catalyst. The mild reaction conditions allow the preparation of aromatic borates in good yields with excellent functional group tolerance. This photochemical protocol was also successfully applied to the late-stage modification of natural products and the synthesis of a drug intermediate, greatly demonstrating broadened utility.
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Affiliation(s)
- Bo Li
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal23955-6900, Saudi Arabia.,Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074Aachen, Germany
| | - Ke Wang
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074Aachen, Germany
| | - Huifeng Yue
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal23955-6900, Saudi Arabia
| | - Alwin Drichel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074Aachen, Germany
| | - Jingjing Lin
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074Aachen, Germany
| | - Zhenying Su
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074Aachen, Germany
| | - Magnus Rueping
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal23955-6900, Saudi Arabia
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22
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Chen YJ, Deng WH, Guo JD, Ci RN, Zhou C, Chen B, Li XB, Guo XN, Liao RZ, Tung CH, Wu LZ. Transition-Metal-Free, Site-Selective C-F Arylation of Polyfluoroarenes via Electrophotocatalysis. J Am Chem Soc 2022; 144:17261-17268. [PMID: 36070360 DOI: 10.1021/jacs.2c08068] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Direct CAr-F arylation is effective and sustainable for synthesis of polyfluorobiaryls with different degrees of fluorination, which are important motifs in medical and material chemistry. However, with no aid of transition metals, the engagement of CAr-F bond activation has proved difficult. Herein, an unprecedented transition-metal-free strategy is reported for site-selective CAr-F arylation of polyfluoroarenes with simple (het)arenes. By merging N,N-bis(2,6-diisopropylphenyl)perylene-3,4,9,10-bis(dicarboximide)-catalyzed electrophotocatalytic reduction and anodic nitroxyl radical oxidation in an electrophotocatalytic cell, various polyfluoroaromatics (2F-6F and 8F), especially inactive partially fluorinated aromatics, undergo sacrificial-reagents-free C-F bond arylation with high regioselectivity, and the yields are comparable to those for reported transition-metal catalysis. This atom- and step-economic protocol features a paired electrocatalysis with organic mediators in both cathodic and anodic processes. The broad substrate scope and good functional-group compatibility highlight the merits of this operationally simple strategy. Moreover, the easy gram-scale synthesis and late-stage functionalization collectively advocate for the practical value, which would promote the vigorous development of fluorine chemistry.
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Affiliation(s)
- Ya-Jing Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Wen-Hao Deng
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Jia-Dong Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Rui-Nan Ci
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chao Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xu-Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xiao-Ning Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Rong-Zhen Liao
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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23
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Wang Y, Chang W, Qin S, Ang H, Ma J, Lu S, Liang Y. Diversification of Aryl Sulfonyl Compounds through Ligand‐Controlled
meta
‐ and
para
‐C−H Borylation. Angew Chem Int Ed Engl 2022; 61:e202206797. [DOI: 10.1002/anie.202206797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Indexed: 01/05/2023]
Affiliation(s)
- Yajun Wang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Wenju Chang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Shengmeng Qin
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Han Ang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Jiawei Ma
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Shuo Lu
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
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24
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Veth L, Grab HA, Dydio P. Recent Trends in Group 9 Catalyzed C–H Borylation Reactions: Different Strategies To Control Site-, Regio-, and Stereoselectivity. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1711-5889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractOrganoboron compounds continue contributing substantially to advances in organic chemistry with their increasing role as both synthetic intermediates and target compounds for medicinal chemistry. Particularly attractive methods for their synthesis are based on the direct borylation of C–H bonds of available starting materials since no additional pre-functionalization steps are required. However, due to the high abundance of C–H bonds with similar reactivity in organic molecules, synthetically useful C–H borylation protocols demand sophisticated strategies to achieve high regio- and stereoselectivity. For this purpose, selective transition-metal-based catalysts have been developed, with group 9 centered catalysts being among the most commonly utilized. Recently, a multitude of diverse strategies has been developed to push the boundaries of C–H borylation reactions with respect to their regio- and enantioselectivity. Herein, we provide an overview of approaches for the C–H borylation of arenes, alkenes, and alkanes based on group 9 centered catalysts with a focus on the recent literature. Lastly, an outlook is given to assess the future potential of the field.1 Introduction1.1 Mechanistic Considerations1.2 Selectivity Issues in C–H Borylation1.3 Different Modes of Action Employing Directing Group Strategies in C–H Borylation1.4 Scope and Aim of this Short Review2 Trends in C–H Borylation Reactions2.1 Photoinduced Catalysis2.2 Transfer C–H Borylation2.3 Lewis Acid Mediated C–H Borylation2.4 Directed Metalation2.5 Miscellaneous C–H Borylation Reactions2.6 Electrostatic Interactions2.7 Hydrogen Bonding3 Conclusion and Outlook
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25
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Wang H, Fu L, Zhou C, Li G. Pd(ii)-catalyzed meta-C-H bromination and chlorination of aniline and benzoic acid derivatives. Chem Sci 2022; 13:8686-8692. [PMID: 35974770 PMCID: PMC9337732 DOI: 10.1039/d2sc01834a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/04/2022] [Indexed: 12/02/2022] Open
Abstract
The classic electrophilic bromination leads to ortho- and para-bromination of anilines due to their electron-rich properties. Herein we report the development of an unprecedented Pd-catalyzed meta-C-H bromination of aniline derivatives using commercially available N-bromophthalimide (NBP), which overcomes the competing ortho/para-selectivity of electrophilic bromination of anilines. The addition of acid additives is crucial for the success of this reaction. A broad range of substrates with various substitution patterns can be tolerated in this reaction. Moreover, benzoic acid derivatives bearing complex substitution patterns are also viable with this mild bromination reaction, and meta-C-H chlorination is also feasible under similar reaction conditions. The ease of the directing group removal and subsequent diverse transformations of the brominated products demonstrate the application potential of this method and promise new opportunities for drug discovery.
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Affiliation(s)
- Hao Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 China
| | - Lei Fu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 China
| | - Chunlin Zhou
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 China
| | - Gang Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 China
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University Shanghai 200240 China
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26
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Li NN, Li M, Gao JN, Zhang Z, Xie JB. Revisiting the Mg/TMSCl/Dipolar Solvent System for Dearomatic Silylation of Aryl Carbonyl Compounds: Substrate Scope, Transformations, and Mechanistic Studies. J Org Chem 2022; 87:10876-10889. [PMID: 35905447 DOI: 10.1021/acs.joc.2c01178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dearomatic silylation of arene derivatives is an intriguing synthetic target, which represents an elegant extension of Birch reduction and produces silylated cyclohexene derivatives with great potential of further transformation. Herein, we report a systematic study on dearomatic silylation of aryl carbonyl compounds with Mg and the TMSCl/NMP adduct. The protocol displays a wide range of substrate scope, including alkyl aryl ketones, aromatic amides, benzonitriles, tert-butyl benzoates, and even 2,2'-bipyridines. Synthetic utility is demonstrated using the products as versatile substrate in various transformations. The detailed mechanism is presented with both control experimental analyses and theoretical calculations. An unusual five-coordinated silicon dianion intermediate is first proposed and described here. The selectivity is influenced by the relative rates of single electron reductions (the TMSCl/NMP adduct versus the substrate) and the steric effects.
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Affiliation(s)
- Nan-Nan Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Meng Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Jia-Ni Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Zhong Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Jian-Bo Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.,Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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27
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Hoque ME, Bisht R, Unnikrishnan A, Dey S, Mahamudul Hassan MM, Guria S, Rai RN, Sunoj RB, Chattopadhyay B. Iridium‐Catalyzed Ligand‐Controlled Remote
para
‐Selective C−H Activation and Borylation of Twisted Aromatic Amides. Angew Chem Int Ed Engl 2022; 61:e202203539. [DOI: 10.1002/anie.202203539] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Indexed: 12/14/2022]
Affiliation(s)
- Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Anju Unnikrishnan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sayan Dey
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Mirja Md Mahamudul Hassan
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Saikat Guria
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Rama Nand Rai
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Raghavan B. Sunoj
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
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28
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Mondal P, Pal R, Pal AK, Das S, Misra A, Datta A. Understanding the Regioselectivity of Ion-Pair-Assisted Meta-Selective C(sp 2)-H Activation in Conformationally Flexible Arylammonium Salts. J Org Chem 2022; 87:9222-9231. [PMID: 35771188 DOI: 10.1021/acs.joc.2c00957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The lack of directionality and the long-range nature of Coulomb interactions have been a bottleneck to achieve chemically precise C-H activation using ion-pairs. Recent report by Phipps and co-workers of the ion-pair-directed regioselective Iridium-catalyzed borylation opens a new direction toward harnessing noncovalent interactions for C-H activation. In this article, the mechanism and specific role of ion-pairing are investigated using density functional theory (DFT). Computational studies reveal that meta C-H activation is kinetically more favorable than the para analogue due to stronger electrostatic interactions between the ion-pairs in closer proximity [d(NMe3+···SO3-)TSP1m = 3.93 Å versus d(NMe3+···SO3-)TSP1p = 4.30 Å]. The electrostatic interactions overwhelm the Pauli repulsion and distortion interactions incurred in bringing the oppositely charged ions in close contact for the rate-limiting meta transition state (TSP1m). Multiple linear regression shows that the free energies of activation correlate well with descriptors like the charge densities on the meta carbon and Ir atom along with that on the cation and anion with R2 = 0.74. Tuned range-separated DFT calculations demonstrate accurately the localization of charge separation in the reactant complex and transition state for the meta selectivity.
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Affiliation(s)
- Partha Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Rapti Pal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Arun K Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Soumik Das
- Department of Chemistry, University of North Bengal, Dist-Darjeeling 734013, India
| | - Anirban Misra
- Department of Chemistry, University of North Bengal, Dist-Darjeeling 734013, India
| | - Ayan Datta
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
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29
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Wang Y, Chang W, Qin S, Ang H, Ma J, Lu S, Liang Y. Diversification of Aryl Sulfonyl Compounds through Ligand Controlled meta‐ and para‐C‐H Borylation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yajun Wang
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Wenju Chang
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Shengmeng Qin
- Nanjing University of Chemical Technology: Nanjing Tech University School of Chemistry and Chemical Engineering CHINA
| | - Han Ang
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Jiawei Ma
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Shuo Lu
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Yong Liang
- Nanjing University Chemistry 163 Xianlin Ave 210023 Nanjing CHINA
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30
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Lee S, Chung W. Enantioselective halogenation via asymmetric
phase‐transfer
catalysis. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sunggi Lee
- Department of Physics and Chemistry DGIST Daegu Republic of Korea
| | - Won‐jin Chung
- Department of Chemistry GIST Gwangju Republic of Korea
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31
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Wu Q, Muto K, Yamaguchi J. Pd-Catalyzed 1,4-Carboamination of Bicyclic Bromoarenes with Diazo Compounds and Amines. Org Lett 2022; 24:4129-4134. [PMID: 35652792 DOI: 10.1021/acs.orglett.2c01233] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A palladium-catalyzed 1,4-carboamination of bromoarenes with diazo compounds and amines was developed. This reaction proceeds through a palladium-carbene that then generates a π-benzylpalladium intermediate, forming ipso C-C and para C-N bonds on bromoarenes in a regioselective manner. The successful application of this transformation to the rapid synthesis of an antitumor agent demonstrates its synthetic utility.
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Affiliation(s)
- Qikun Wu
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
| | - Kei Muto
- Waseda Institute for Advanced Study, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
| | - Junichiro Yamaguchi
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
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32
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Geng J, Fang Z, Tu G, Zhao Y. Non-directed highly para-selective C-H functionalization of TIPS-protected phenols promoted by a carboxylic acid ligand. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.06.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Bisht R, Haldar C, Hassan MMM, Hoque ME, Chaturvedi J, Chattopadhyay B. Metal-catalysed C-H bond activation and borylation. Chem Soc Rev 2022; 51:5042-5100. [PMID: 35635434 DOI: 10.1039/d1cs01012c] [Citation(s) in RCA: 83] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Transition metal-catalysed direct borylation of hydrocarbons via C-H bond activation has received a remarkable level of attention as a popular reaction in the synthesis of organoboron compounds owing to their synthetic versatility. While controlling the site-selectivity was one of the most challenging issues in these C-H borylation reactions, enormous efforts of several research groups proved instrumental in dealing with selectivity issues that presently reached an impressive level for both proximal and distal C-H bond borylation reactions. For example, in the case of ortho C-H bond borylation reactions, innovative methodologies have been developed either by the modification of the directing groups attached with the substrates or by creating new catalytic systems via the design of new ligand frameworks. Whereas meta and para selective C-H borylations remained a formidable challenge, numerous innovative concepts have been developed within a very short period of time by the development of new catalytic systems with the employment of various noncovalent interactions. Moreover, significant advancements have occurred for aliphatic C(sp3)-H borylations as well as enantioselective borylations. In this review article, we aim to discuss and summarize the different approaches and findings related to the development of directed proximal ortho, distal meta/para, aliphatic (racemic and enantioselective) borylation reactions since 2014. Additionally, considering the C-H borylation reaction as one of the most important mainstream reactions, various applications of this C-H borylation reaction toward the synthesis of natural products, therapeutics, and applications in materials chemistry will be summarized in the last part of this review article.
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Affiliation(s)
- Ranjana Bisht
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Chabush Haldar
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Mirja Md Mahamudul Hassan
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Md Emdadul Hoque
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Jagriti Chaturvedi
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
| | - Buddhadeb Chattopadhyay
- Center of Bio-Medical Research, Division of Molecular Synthesis & Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, Uttar Pradesh, India.
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34
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Wang N, Chi Z, Wang X, Gao Z, Li S, Li G. Formal C-H/C-I Metathesis: Site-Selective C-H Iodination of Anilines Using Aryl Iodides. Org Lett 2022; 24:3657-3662. [PMID: 35576322 DOI: 10.1021/acs.orglett.2c01283] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Functional group metathesis has the potential to render mild reaction conditions for C-H functionalization. Protocols for the meta- and ortho-C-H iodination of aniline derivatives via formal C(sp2)-H/C(sp2)-I metathesis using 2-nitrophenyl iodides as mild iodinating reagents are reported herein. These protocols led to the production of a range of valuable iodinated aniline derivatives. These results demonstrate the potential of developing novel site-selective C-H activation reactions with electron-rich compounds, since mild reagents can often been utilized in functional group metathesis reactions.
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Affiliation(s)
- Ning Wang
- College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350002, China.,Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Zhuomin Chi
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Xinchao Wang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Zezhong Gao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Shangda Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Gang Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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35
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Lu S, Zheng T, Ma J, Deng Z, Qin S, Chen Y, Liang Y. para-Selective C-H Borylation of Aromatic Quaternary Ammonium and Phosphonium Salts. Angew Chem Int Ed Engl 2022; 61:e202201285. [PMID: 35253322 DOI: 10.1002/anie.202201285] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 11/06/2022]
Abstract
Aromatic ammonium and phosphonium salts are important synthetic intermediates and multifunctional materials, but para-selective functionalization of the aromatic salts remains a challenge. Here we develop an ionic ligand based on our newly designed "biphenyl-phenanthroline" skeleton and realize the Ir-catalyzed para-selective C-H borylation of seven types of aromatic quaternary ammonium and phosphonium salts. Gram-scale transformation, late-stage elaboration for drug molecule, and diversification of borylated products demonstrate the potential utility of this reaction. The mechanistic studies and computational analysis elucidate the origin of para-selectivity.
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Affiliation(s)
- Shuo Lu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Tianyu Zheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Jiawei Ma
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Zhangming Deng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Shengmeng Qin
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yu Chen
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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36
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Gou Q, Chen Q, Tan Q, Zhu M, Huang H, Deng M, Yi W, He S. Divergent Regioselective Csp 2-H Difluoromethylation of Aromatic Amines Enabled by Nickel Catalysis. Org Lett 2022; 24:3549-3554. [PMID: 35522204 DOI: 10.1021/acs.orglett.2c01262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Herein, the first catalytic protocol for nickel-catalyzed ortho or para position difluoromethylation of various aromatic amines has been developed with the assistance of a bidentate phosphine ligand, offering an invaluable synthesis means to construct extensive p-difluoromethylated products and difluorooxindole derivatives with significant functional fragments. Furthermore, the gram-scale reaction, broad substrate scope, excellent functional-group compatibility, late-stage difluoromethylation of pesticides, and even formal synthesis of HDAC6 inhibitors further demonstrate the usefulness of this method.
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Affiliation(s)
- Quan Gou
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100 China
| | - Qianqiong Chen
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100 China
| | - Qiujian Tan
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100 China
| | - Minghong Zhu
- Fuling Hospital, Chongqing University, Chongqing 408000 China
| | - Huisheng Huang
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100 China
| | - Mengjiao Deng
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100 China
| | - Wei Yi
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100 China
| | - Shuhua He
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100 China
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37
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Hoque ME, Bisht R, Unnikrishnan A, Dey S, Mahamudul Hassan MM, Guria S, Rai RN, Sunoj RB, Chattopadhyay B. Iridium‐Catalyzed Ligand‐Controlled Remote
para
‐Selective C−H Activation and Borylation of Twisted Aromatic Amides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Anju Unnikrishnan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sayan Dey
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Mirja Md Mahamudul Hassan
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Saikat Guria
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Rama Nand Rai
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Raghavan B. Sunoj
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
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38
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Douthwaite JL, Phipps RJ. Extended sulfonated bipyridine ligands targeting the para-selective borylation of arenes. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132831] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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40
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Zhong RL, Suzuki K, Yamashita M, Sakaki S. Theoretical Insight into Catalysis of the Aluminabenzene–Iridium Complex for C(sp 3)–H Borylation of NEt 3: How to Control α- and β-Regioselectivities? ACS Catal 2022. [DOI: 10.1021/acscatal.1c05792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Rong-Lin Zhong
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Katsunori Suzuki
- Department of Applied Chemistry, Faculty of Engineering, Sanyo-Onoda City University, Daigakudori 1-1-1, Sanyo-Onoda, Yamaguchi 756-0884, Japan
| | - Makoto Yamashita
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho,
Chikusa-ku, Nagoya 464-8603, Japan
| | - Shigeyoshi Sakaki
- Element Strategy Initiative for Catalysts and Batteries, Kyoto University, Goryo-Ohara 1-30,
Nishikyo-ku, Kyoto 615-8245, Japan
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41
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Aitken RA, Harper AD, Inwood RA, Slawin AMZ. Access to Diarylmethanols by Wittig Rearrangement of ortho-, meta-, and para-Benzyloxy- N-Butylbenzamides. J Org Chem 2022; 87:4692-4701. [PMID: 35286089 PMCID: PMC9007461 DOI: 10.1021/acs.joc.1c03160] [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] [Indexed: 11/30/2022]
Abstract
![]()
The N-butyl amide
group, CONHBu, has been found
to be an effective promoter of the [1,2]-Wittig rearrangement of aryl
benzyl ethers and thus allow the two-step synthesis of isomerically
pure substituted diarylmethanols starting from simple hydroxybenzoic
acid derivatives. The method is compatible with a wide range of functional
groups including methyl, methoxy, and fluoro, although not with nitro
and, unexpectedly, is applicable to meta as well
as ortho and para isomeric series.
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Affiliation(s)
- R Alan Aitken
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Andrew D Harper
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Ryan A Inwood
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Alexandra M Z Slawin
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
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42
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Lu S, Zheng T, Ma J, Deng Z, Qin S, Chen Y, Liang Y. para
‐Selective C−H Borylation of Aromatic Quaternary Ammonium and Phosphonium Salts. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201285] [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]
Affiliation(s)
- Shuo Lu
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Tianyu Zheng
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Jiawei Ma
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Zhangming Deng
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Shengmeng Qin
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Yu Chen
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
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43
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Fernández-Figueiras A, Ravutsov MA, Simeonov SP. Site-Selective C-H Functionalization of Arenes Enabled by Noncovalent Interactions. ACS OMEGA 2022; 7:6439-6448. [PMID: 35252639 PMCID: PMC8892649 DOI: 10.1021/acsomega.1c05830] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 01/31/2022] [Indexed: 06/01/2023]
Abstract
The direct metal-catalyzed C-H functionalization of arenes has emerged as a powerful tool for streamlining the synthesis of complex molecular scaffolds. However, despite the different chemical environments, the energy values of all C-H bonds are within a fairly narrow range; hence, the regioselective C-H bond functionalization poses a great challenge. The use of covalently bound directing groups is to date the most exploited approach to achieve regioselective C-H functionalization of arenes. However, the required installation and removal of those groups is a serious drawback. Recently, new strategies for regioselective metal-catalyzed distal C-H functionalization of arenes based on noncovalent forces (hydrogen bonds, Lewis acid-base interactions, ionic or electrostatic forces, etc.) have been developed to tackle these issues. Nowadays, these approaches have already showcased impressive advances. Therefore, the aim of this mini-review is to cover chronologically how these groundbreaking strategies evolved over the past decade.
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Affiliation(s)
- Adolfo Fernández-Figueiras
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy
of Sciences, Acad. G. Bonchev St., bl. 9, 1113 Sofia, Bulgaria
| | - Martin A. Ravutsov
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy
of Sciences, Acad. G. Bonchev St., bl. 9, 1113 Sofia, Bulgaria
| | - Svilen P. Simeonov
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy
of Sciences, Acad. G. Bonchev St., bl. 9, 1113 Sofia, Bulgaria
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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44
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Bastidas JRM, Chhabra A, Feng Y, Oleskey TJ, Smith MR, Maleczka RE. Steric Shielding Effects Induced by Intramolecular C-H⋯O Hydrogen Bonding: Remote Borylation Directed by Bpin Groups. ACS Catal 2022; 12:2694-2705. [PMID: 36685107 PMCID: PMC9854017 DOI: 10.1021/acscatal.1c05701] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Regioselectivities in catalytic C-H borylations (CHBs) have been rationalized using simplistic steric models and correlations with nuclear magnetic resonance (NMR) chemical shifts. However, regioselectivity can be significant for important substrate classes where none would be expected from these arguments. In this study, intramolecular hydrogen bonding (IMHB) can lead to steric shielding effects that can direct Ir-catalyzed CHB regiochemistry. Bpin (Bpin = pinacol boronic ester)/arene IMHB can promote remote borylations of N-borylated anilines, 2-amino-N-alkylpyridine, tetrahydroquinolines, indoles, and 1-borylated naphthalenes. Experimental and computational studies support molecular geometries with the Bpin orientation controlled by a C-H⋯O IMHB. IMHB-directed remote CHB appeared operative in the C6 borylation of 3-aminoindazole (seven-membered IMHB) and C6 borylation of an osimertinib analogue where a pyrimidine IMHB creates the steric shield. This study informs researchers to evaluate not only inter- but also intramolecular noncovalent interactions as potential drivers of remote CHB regioselectivity.
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Affiliation(s)
- Jose R Montero Bastidas
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Arzoo Chhabra
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Yilong Feng
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Thomas J Oleskey
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Milton R Smith
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Robert E Maleczka
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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45
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Zhang H, Guo Q, Cheng H, Ran C, Wu D, Lan J. An umpolung strategy for rapid access to thermally activated delayed fluorescence (TADF) materials based on phenazine. Chem Commun (Camb) 2022; 58:1581-1584. [PMID: 35018392 DOI: 10.1039/d1cc06705b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Herein, Ag(I)-promoted regioselective intramolecular radical nucleophilic addition/rearrangement of 2-aryl diazaboroles has been accomplished for the first time to construct phenazine structures. This protocol is an umpolung strategy based on the classical electrophilic mechanism, and therefore, a reversed regioselectivity was observed, which provides an opportunity to prepare sterically hindered phenazines. The resulting thermally activated delayed fluorescence (TADF) materials based on phenazine exhibit emission bands from green to red with high quantum yields and moderate fluorescence lifetimes as solid films.
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Affiliation(s)
- Huaxing Zhang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China.
| | - Qiang Guo
- College of Optoelectronic Engineering, Chengdu University of Information Technology, 24 Xuefu Road, Chengdu 610225, P. R. China
| | - Hu Cheng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China.
| | - Chunhao Ran
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China.
| | - Di Wu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China.
| | - Jingbo Lan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China.
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46
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Yu D, Liu Y, Che CM. Tungsten catalysed decarboxylative [3 + 2] cycloaddition aromatization: one-pot synthesis of trifluoromethyl-pyrrolo[2,1- a]isoquinolines with visible light irradiation. Org Chem Front 2022. [DOI: 10.1039/d2qo00401a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Trifluoromethyl-pyrrolo[2,1-a]isoquinolines, which are difficult to prepare via traditional methods, could be readily prepared via a tungsten-catalysed decarboxylative [3 + 2] cycloaddition aromatization process.
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Affiliation(s)
- Daohong Yu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, 341000, China
| | - Yungen Liu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Chi-Ming Che
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
- HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518055, China
- Laboratory for Synthetic Chemistry and Chemical Biology Limited, Units 1503-1511, 15/F, Building 17W, Hong Kong Science and Technology Parks, New Territories, Hong Kong, China
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47
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Tu G, Ju G, Huang Z, Ji SJ, Zhao Y. Nickel-catalyzed para-selective carboxylation of phenols with CBr 4/MeOH. Org Chem Front 2022. [DOI: 10.1039/d2qo00462c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
1,10-Phenanthroline-assisted, Ni(ii)-catalyzed para-carboxylation of phenol derivatives is reported.
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Affiliation(s)
- Guangliang Tu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Guodong Ju
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Zhibin Huang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453000, P.R. China
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48
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Liu S, Wang Q, Huang F, Wang W, Yang C, Liu J, Chen D. Insight into the mechanism of the arylation of arenes via norbornene relay palladation through meta- to para-selectivity. Org Chem Front 2022. [DOI: 10.1039/d1qo01500a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A theoretical insight was shown into the origin of site-selectivity in the arylation of arenes by a norbornene relay palladation through meta- to para-selectivity.
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Affiliation(s)
- Shengnan Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Qiong Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Fang Huang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Wenjuan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Chong Yang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Jianbiao Liu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Dezhan Chen
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institute of Molecular and Nano Science, Shandong Normal University, Jinan 250014, P. R. China
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49
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Cheng YY, Yu JX, Lei T, Hou HY, Chen B, Tung CH, Wu LZ. Direct 1,2-Dicarbonylation of Alkenes towards 1,4-Diketones via Photocatalysis. Angew Chem Int Ed Engl 2021; 60:26822-26828. [PMID: 34586701 DOI: 10.1002/anie.202112370] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Indexed: 12/17/2022]
Abstract
1,4-Dicarbonyl compounds are intriguing motifs and versatile precursors in numerous pharmaceutical molecules and bioactive natural compounds. Direct incorporation of two carbonyl groups into a double bond at both ends is straightforward, but also challenging. Represented herein is the first example of 1,2-dicarbonylation of alkenes by photocatalysis. Key to success is that N(n-Bu)4 + not only associates with the alkyl anion to avoid protonation, but also activates the α-keto acid to undergo electrophilic addition. The α-keto acid is employed both for acyl generation and electrophilic addition. By tuning the reductive and electrophilic ability of the acyl precursor, unsymmetric 1,4-dicarbonylation is achieved for the first time. This metal-free, redox-neutral and regioselective 1,2-dicarbonylation of alkenes is executed by a photocatalyst for versatile substrates under extremely mild conditions and shows great potential in biomolecular and drug molecular derivatization.
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Affiliation(s)
- Yuan-Yuan Cheng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ji-Xin Yu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Hong-Yu Hou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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50
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Cheng Y, Yu J, Lei T, Hou H, Chen B, Tung C, Wu L. Direct 1,2‐Dicarbonylation of Alkenes towards 1,4‐Diketones via Photocatalysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yuan‐Yuan Cheng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Ji‐Xin Yu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Hong‐Yu Hou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Chen‐Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
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