1
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Mao L, Liu C, Tan X, Yao B, Wu J, Wu W, Jiang H. Pd-catalyzed Markovnikov selective oxidative amination of 4-pentenoic acid. Chem Commun (Camb) 2024. [PMID: 39150353 DOI: 10.1039/d4cc02504k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Pd-catalyzed regioselective amination of unactivated alkene remains a challenge and is of great interest. Herein, a palladium-catalyzed and ligand-controlled strategy for the Markovnikov selective oxidative amination of 4-pentenoic acid has been described. The protocol effectively reverses the carboxylic acid-directed anti-Markovnikov selectivity in oxidative amination of 4-pentenoic acid, successfully constructing γ-ketoamide derivatives.
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Affiliation(s)
- Lihua Mao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Chao Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Xiangwen Tan
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Biao Yao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Jiahao Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
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2
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De Snoo W, Kong WY, Tantillo DJ. Allyl-Allyl Coupling Promoted by Catalyst Systems with two Palladium Atoms - A Plethora of Potentially Pericyclic Processes. Angew Chem Int Ed Engl 2024; 63:e202406095. [PMID: 38709849 DOI: 10.1002/anie.202406095] [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: 03/29/2024] [Revised: 04/29/2024] [Accepted: 05/06/2024] [Indexed: 05/08/2024]
Abstract
Recently, Huang and co-workers reported a catalytic reaction that utilizes H2 as the sole reductant for a C-C coupling of allyl groups with yields up to 96 %. Here we use computational quantum chemistry to identify several key features of this reaction that provide clarity on how it proceeds. We propose the involvement of a Pd-Pd bound dimer precatalyst, demonstrate the importance of ligand π-π interactions and counterions, and identify a new, energetically viable, mechanism involving two dimerized, outer-sphere reductive elimination transition structures that determine both the rate and selectivity. Although we rule out the previously proposed transmetalation step on energetic grounds, we show it to have an unusual aromatic transition structure in which two Pd atoms support rearranging electrons. The prevalence of potential metal-supported pericyclic reactions in this system suggests that one should consider such processes regularly, but the results of our calculations also indicate that one should do so with caution.
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Affiliation(s)
- William De Snoo
- Department of Chemistry, University of California-Davis, Davis, CA 95616, USA
| | - Wang-Yeuk Kong
- Department of Chemistry, University of California-Davis, Davis, CA 95616, USA
| | - Dean J Tantillo
- Department of Chemistry, University of California-Davis, Davis, CA 95616, USA
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3
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Xu BB, Jin N, Liu JC, Liao AQ, Lin HY, Qin XY. Arene-Arene Coupled Disulfamethazines (or Sulfadiazine)-Phenanthroline-Metal(II) Complexes were Synthesized by In Situ Reactions and Inhibited the Growth and Development of Triple-Negative Breast Cancer through the Synergistic Effect of Antiangiogenesis, Anti-Inflammation, Pro-Apoptosis, and Cuproptosis. J Med Chem 2024. [PMID: 38634624 DOI: 10.1021/acs.jmedchem.3c02432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
The novel metal(II)-based complexes HA-Cu, HA-Co, and HA-Ni with phenanthroline, sulfamethazine, and aromatic-aromatic coupled disulfamethazines as ligands were synthesized and characterized. HA-Cu, HA-Co, and HA-Ni all showed a broad spectrum of cytotoxicity and antiangiogenesis. HA-Cu was superior to HA-Co and HA-Ni, and even superior to DDP, showing significant inhibitory effect on the growth and development of tripe-negative breast cancer in vivo and in vitro. HA-Cu exhibited observable synergistic effects of antiproliferation, antiangiogenesis, anti-inflammatory, pro-apoptosis, and cuproptosis to effectively inhibited tumor survival and development. The molecular mechanism was confirmed that HA-Cu could downregulate the expression of key proteins in the VEGF/VEGFR2 signaling pathway and the expression of inflammatory cytokines, enhance the advantage of pro-apoptotic protein Bax, and enforce cuproptosis by weakening the expression of FDX1 and enhancing the expression of HSP70. Our research will provide a theoretical and practical reference for the development of metal-sulfamethazine and its derivatives as chemotherapy drugs for cancer treatment.
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Affiliation(s)
- Bing-Bing Xu
- College of Pharmacy, Guilin Medical University, Guilin, Guangxi 541004, China
| | - Nan Jin
- College of Pharmacy, Guilin Medical University, Guilin, Guangxi 541004, China
| | - Ji-Cheng Liu
- Nanning Institute for Food and Drug Control, Nanning, Guangxi 530007, China
| | - Ai-Qiu Liao
- College of Pharmacy, Guilin Medical University, Guilin, Guangxi 541004, China
| | - Hong-Yu Lin
- College of Pharmacy, Guilin Medical University, Guilin, Guangxi 541004, China
| | - Xiu-Ying Qin
- College of Pharmacy, Guilin Medical University, Guilin, Guangxi 541004, China
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4
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Meng Y, Zare RN, Gnanamani E. Superfast Formation of C(sp 2 )-N, C(sp 2 )-P, and C(sp 2 )-S Vinylic Bonds in Water Microdroplets. Angew Chem Int Ed Engl 2024; 63:e202316131. [PMID: 38116872 DOI: 10.1002/anie.202316131] [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: 10/24/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 12/21/2023]
Abstract
We report examples of C(sp2 )-N, C(sp2 )-S, and C(sp2 )-P bond-forming transformations in water microdroplets at room temperature and atmospheric pressure using N2 as a nebulizing gas. When an aqueous solution of vinylic acid and amine is electrosprayed (+3 kV), the corresponding C(sp2 )-N product is formed in a single step, which was characterized using mass spectrometry (MS) and tandem mass spectrometry (MS2 ). The scope of this reaction was extended to other amines and other unsaturated acids, including acrylic (CH2 =CHCOOH) and crotonic (CH3 CH=CHCOOH) acids. We also found that thiols and phosphines are viable nucleophiles, and the corresponding C(sp2 )-S and C(sp2 )-P products are observed in positive ion mode using MS and MS2 .
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Affiliation(s)
- Yifan Meng
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Richard N Zare
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Elumalai Gnanamani
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
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5
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Mondal S, Midya SP, Mondal S, Das S, Ghosh P. Merging Photocatalytic Doubly-Decarboxylative C sp 2 -C sp 2 Cross-Coupling for Stereo-Selective (E)-α,β-Unsaturated Ketones Synthesis. Chemistry 2024; 30:e202303337. [PMID: 37987541 DOI: 10.1002/chem.202303337] [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: 10/11/2023] [Revised: 11/10/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
A photocatalytic domain of doubly decarboxylative Csp 2 -Csp 2 cross coupling reaction is disclosed. Merging iridium and palladium photocatalysis manifested carbon-carbon bonds in a tandem dual-radical pathway. Present catalytic platform efficiently cross-coupled α, β-unsaturated acids and α-keto acids to afford a variety of α, β-unsaturated ketones with excellent (E)-selectivity and functional group tolerance. Mechanistically, photocatalyst implicated through reductive quenching cycle whereas cross coupling proceeded over one electron oxidative pallado-cycle.
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Affiliation(s)
- Subal Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Siba P Midya
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Soumya Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Suman Das
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Pradyut Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India
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6
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Hu T, Liu J, Yuan H, Zhang L, Wang Y. Interface Charge Distribution Engineering of Pd-CeO 2 /C for Efficient Carbohydrazide Oxidation Reaction. CHEMSUSCHEM 2024; 17:e202301078. [PMID: 37723645 DOI: 10.1002/cssc.202301078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 09/12/2023] [Accepted: 09/18/2023] [Indexed: 09/20/2023]
Abstract
Carbohydrazide electrooxidation reaction (COR) is a potential alternative to oxygen evolution reaction in water splitting process. However, the sluggish kinetics process impels to develop efficient catalysts with the aim of the widespread use of such catalytic system. Since COR concerns the adsorption/desorption of reactive species on catalysts, the electronic structure of electrocatalyst can affect the catalytic activity. Interface charge distribution engineering can be considered to be an efficient strategy for improving catalytic performance, which facilitates the cleavage of chemical bond. Herein, highly dispersed Pd nanoparticles on CeO2 /C catalyst are prepared and the COR catalytic performance is investigated. The self-driven charge transfer between Pd and CeO2 can form the local nucleophilic and electrophilic region, promoting to the adsorption of electron-withdrawing and electron-donating group in carbohydrazide molecule, which facilitates the cleavage of C-N bond and the carbohydrazide oxidation. Due to the local charge distribution, the Pd-CeO2 /C exhibits superior COR catalytic activity with a potential of 0.27 V to attain 10 mA cm-2 . When this catalyst is used for energy-efficient electrolytic hydrogen production, the carbohydrazide electrolysis configuration exhibits a low cell voltage (0.6 V at 10 mA cm-2 ). This interface charge distribution engineering can provide a novel strategy for improving COR catalytic activity.
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Affiliation(s)
- Tianjun Hu
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science, Shanxi Normal University, 339 Taiyu Road, TaiYuan, 030032, China
| | - Jiali Liu
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science, Shanxi Normal University, 339 Taiyu Road, TaiYuan, 030032, China
| | - Hongjie Yuan
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science, Shanxi Normal University, 339 Taiyu Road, TaiYuan, 030032, China
| | - Limin Zhang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science, Shanxi Normal University, 339 Taiyu Road, TaiYuan, 030032, China
| | - Ying Wang
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science, Shanxi Normal University, 339 Taiyu Road, TaiYuan, 030032, China
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7
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Kumar R. Transition-Metal-Catalyzed 1,2-Diaminations of Olefins: Synthetic Methodologies and Mechanistic Studies. Chem Asian J 2024; 19:e202300705. [PMID: 37743249 DOI: 10.1002/asia.202300705] [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: 08/12/2023] [Revised: 09/20/2023] [Accepted: 09/20/2023] [Indexed: 09/26/2023]
Abstract
1,2-Diamines are synthetically important motifs in organo-catalysis, natural products, and drug research. Continuous utilization of transition-metal based catalyst in direct 1,2-diamination of olefines, in contrast to metal-free transformations, with numerous impressive advances made in recent years (2015-2023). This review summarized contemporary research on the transition-metal catalyzed/mediated [e. g., Cu(II), Pd(II), Fe(II), Rh(III), Ir(III), and Co(II)] 1,2-diamination (asymmetric and non-asymmetric) especially emphasizing the recent synthetic methodologies and mechanistic understandings. Moreover, up-to-date discussion on (i) paramount role of oxidant and catalyst (ii) key achievements (iii) generality and uniqueness, (iv) synthetic limitations or future challenges, and (v) future opportunities are summarized related to this potential area.
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Affiliation(s)
- Ravinder Kumar
- Department of Chemistry, MMEC, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, Haryana, INDIA
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8
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Zhang CP, Zhu YJ, Wang D, Qian J, Zhao YP, Lian C, Zhang ZH, He MY, Chen SC, Chen Q. Ligand-Mediated Regulation of the Chemical/Thermal Stability and Catalytic Performance of Isostructural Cobalt(II) Coordination Polymers. Inorg Chem 2023; 62:17678-17690. [PMID: 37856236 DOI: 10.1021/acs.inorgchem.3c02184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Regulating the chemical/thermal stability and catalytic activity of coordination polymers (CPs) to achieve high catalytic performance is topical and challenging. The CPs are competent in promoting oxidative cross-coupling, yet they have not received substantial attention. Here, the ligand effect of the secondary ligand of CPs for oxidative cross-coupling reactions was investigated. Specifically, four new isostructural CPs [Co(Fbtx)1.5(4-R-1,2-BDC)]n (denoted as Co-CP-R, Fbtx = 1,4-bis(1,2,4-triazole-1-ylmethyl)-2,3,5,6-tetrafluorobenzene, 4-R-1,2-BDC = 4-R-1,2-benzenedicarboxylate, R = F, Cl, Br, CF3) were prepared. It was found that in the reactions of oxidative amination of benzoxazoles with secondary amines and the oxidative coupling of styrenes with benzaldehydes, both the chemical and thermal stabilities of the four Co-CPs with the R group followed the trend of -CF3 > -Br > -Cl > -F. Density functional theory (DFT) calculations suggested that the difference in reactivity may be ascribed to the effect of substituent groups on the electron transition energy of the cobalt(II) center of these Co-CPs. These findings highlight the secondary ligand effect in regulating the stability and catalytic performance of coordination networks.
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Affiliation(s)
- Cheng-Peng Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Yu-Jun Zhu
- Department of Pharmacy and Biomedical Engineering, Clinical College of Anhui Medical University, Hefei 230031, P. R. China
| | - Danfeng Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Junfeng Qian
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Yu-Pei Zhao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Cheng Lian
- Department of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Zhi-Hui Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Ming-Yang He
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Sheng-Chun Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Qun Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
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9
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Yang S, Wu JY, Lin S, Pu M, Huang ZS, Wang H, Li Q. Divergent Fluorinations of Vinylcyclopropanes: Ring-Opening 1,5-Hydrofluorination and Ring-Retaining 1,2-Difluorination. Chem Asian J 2023; 18:e202300476. [PMID: 37366264 DOI: 10.1002/asia.202300476] [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: 05/29/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 06/28/2023]
Abstract
Organofluorine compounds have been widely used in pharmaceutical, agrochemical, and material sciences. Reported herein are divergent fluorination reactions of vinylcyclopropanes with different electrophiles, which allow the facile synthesis of homoallylic monofluorides and vicinal-difluorides through ring-opening 1,5-hydrofluorination and ring-retaining 1,2-difluorination, respectively. Both protocols feature mild conditions, simple operations, good functional group tolerance, and generally good yields. The practicality of these reactions is demonstrated by their scalability, as well as the successful conversion of the formed homoallylic monofluorides into other complex fluorinated molecules.
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Affiliation(s)
- Shuang Yang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Jun-Yunzi Wu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Shuang Lin
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Meicen Pu
- Department of Endocrinology and Metabolism, Nanfang Hospital of Southern Medical University, Guangzhou, 510515, P. R. China
| | - Zhi-Shu Huang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Honggen Wang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Qingjiang Li
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
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10
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Yang H, Ye Y. Recent Progress in NiH-Catalyzed Linear or Branch Hydrofunctionalization of Terminal or Internal Alkenes. Top Curr Chem (Cham) 2023; 381:23. [PMID: 37474812 DOI: 10.1007/s41061-023-00433-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/12/2023] [Indexed: 07/22/2023]
Abstract
The construction of C-C and C-X (X = N, O, Si, etc.) bonds is an important field in organic synthesis and methodology. In recent decades, studies on transition metal-catalyzed functionalization of alkenes have been on the rise. The individual properties of different transition metals determine the type of reaction that can be applied. Generally, post-transition metals with a large number of electrons in the d-orbit such as Mn, Fe, Co, Ni, Cu and Zn, etc., can be applied to more reaction types than pre-transition metals with a small number of electrons (e.g., Ti, Zr, etc.). Alkyl nickel intermediates formed by oxidative addition could couple with various of nucleophiles or electrophiles. Moreover, nickel has several oxidation valence states, which can flexibly realize a variety of catalytic cycles. These characteristics make nickel favored by researchers in the field of functionalization of alkenes, especially for the hydrofunctionalization of alkenes. Both terminal and internal alkenes could be converted, and the strategies of synthesizing linear and branched compounds have been expanded. Moreover, the guiding groups in alkenes played an almost decisive role in the regional selectivity, and the ligand or temperature also had regulating effects. Herein, we will give a comprehensive and timely overview of the works about the Ni-catalyzed hydrofunctionalization of alkenes and some insights on regional selectivity.
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Affiliation(s)
- Huimin Yang
- School of Pharmacy, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China
| | - Yang Ye
- School of Pharmacy, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
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11
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Zhang Z, Chen L, Wang Y, Dai W, Li P, Yang Z, Li X, Zheng H. Furan Synthesis via a Tandem 1,2-Acyloxy Migration/[3 + 2] Cycloaddition/Aromatization of Enol Ether-Tethered Propargylic Esters. J Org Chem 2023. [PMID: 37192482 DOI: 10.1021/acs.joc.3c00216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
An effective method for the synthesis of furans is developed via a tandem 1,2-acyloxy migration/intramolecular [3 + 2] cycloaddition/aromatization of enol ether-tethered propargylic esters. The reaction exhibits excellent functional group tolerance, broad substrate scope, and excellent chemoselectivity. The isolation of dihydrofuran intermediates in some cases gives more insight into the [3 + 2] cycloisomerization process.
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Affiliation(s)
- Zhiqiang Zhang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing 312000, China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Luxin Chen
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Ying Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Weikai Dai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Pengfei Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Zhen Yang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing 312000, China
- Research Center of Advanced Catalytic Materials & Functional Molecular Synthesis, College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing 312000, China
| | - Xiuhuan Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
| | - Huaiji Zheng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest Agriculture & Forestry University, 3 Taicheng Road, Yangling 712100, China
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12
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Thomas AA, Seidl FJ, Mague JT, Sathyamoorthi S. Ring-Opening Reactions of Phosphoramidate Heterocycles. Tetrahedron 2023; 137:133390. [PMID: 37885946 PMCID: PMC10602049 DOI: 10.1016/j.tet.2023.133390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
We present protocols for the conversion of phosphoramidate heterocycles into 1,3-chloroamines and 1,3-aminoalcohols. For the formation of chloroamines, our optimized protocol involves heating the phosphoramidate starting material with 4 equivalents of HCl in a dioxane/toluene solvent mixture. The substituents on the phosphoramidate starting material have a profound influence on product formation. Phosphoramidates with a variety of aza-heterocyclic substituents engage, but those containing a 5-chloro-8-quinolinol arm are most competent for 1,3-chloroamine formation. Furthermore, only the phosphoramidate cis diastereomers allow for 1,3-chloroamine formation. X-ray crystallography studies coupled with DFT analysis provide a basis for the stark difference in reactivity between the cis and trans diastereomers. Amino-alcohol products form by heating phosphoramidate heterocycles with aqueous HF in toluene. Here, there is no diastereomeric preference or a requirement for an aza-heterocyclic arm. Based on a substrate survey, both reactions tolerate a broad range of substitution patterns and functional groups. This work establishes that phosphoramidates are competent synthons for interesting amine products and further increases the prominence of tethered aza-Wacker technology.
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Affiliation(s)
- Annu Anna Thomas
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas, 66047, USA
| | | | - Joel T. Mague
- Department of Chemistry, Tulane University, New Orleans, Louisiana, 70118, USA
| | - Shyam Sathyamoorthi
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas, 66047, USA
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13
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Jia X, Tian X, Zhuang D, Wan Z, Gu J, Li Z. Copper-Catalyzed Intermolecular Cross-dehydrogenative C-N Coupling at Room Temperature via Remote Activating Group Enabled Radical Relay Strategy. Org Lett 2023; 25:2012-2017. [PMID: 36944029 DOI: 10.1021/acs.orglett.3c00267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Employing N-fluorobenzenesulfonimide (NFSI) as a nitrogen-centered radical (NCR) precursor, an intermolecular C(sp2)-N coupling on heteroarenes or substituted benzenes with remote activated aniline derivatives via copper catalyzed N-N radical relay strategy at room temperature is developed. Good to excellent yields are acquired, and no ligand or additive is required. Reaction scope investigation and preliminary mechanistic studies demonstrate that the remote activating strategy and delicate control on the reactivities of active NCR species are essential to guarantee satisfactory chemo- and site-selectivity.
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Affiliation(s)
- Xiaoqi Jia
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Xiangmin Tian
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Dailin Zhuang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Zhenyang Wan
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Jiahao Gu
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
| | - Ziyuan Li
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, China
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14
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Yang X, Li S, He Y, Dai D, Bao M, Luo Z, Liu X, Geng Y, Fan L. Rhodium(III)-catalyzed oxidative cross-coupling of benzoxazinones with styrenes via C-H activation. Org Biomol Chem 2023; 21:797-806. [PMID: 36594562 DOI: 10.1039/d2ob01655a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Vinylarenes represent an important class of core skeleton embedded in natural products, organic materials, and pharmaceutical molecules. Therefore, numerous efforts have been devoted to developing efficient methods for their preparation. Among them, transition-metal-catalyzed oxidative coupling of arenes and alkenes has proved to be a powerful method due to its high atom and step economy. Although a wide range of oxidative alkenylations of arenes have been developed, the alkenes employed in most cases are still limited to electron-deficient alkenes. Reported herein is a Rh(III)-catalyzed C-H cross-coupling of benzoxazinones and simple unactivated styrenes to furnish a variety of vinylarene scaffolds. This established protocol is characterized by wide functional group compatibility, high yields, and excellent regio- and chemo-selectivity. Mechanistic studies and gram-scale experiments on this high-value conversion are disclosed. Moreover, the potential utility of this method was highlighted by a series of further transformations.
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Affiliation(s)
- Xifa Yang
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Song Li
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Yuhao He
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Danhua Dai
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Mengyao Bao
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Ziyang Luo
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Xiangyang Liu
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Yuehua Geng
- Institute of Pesticide, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Liangxin Fan
- College of Sciences, Henan Agricultural University, Zhengzhou, 450002, China.
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15
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Tian Q, Yin X, Sun R, Wu X, Li Y. The lower the better: Efficient carbonylative reactions under atmospheric pressure of carbon monoxide. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214900] [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]
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16
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Wu J, Sun P, Hong Y, Yang H, Xie M, Zhang J. Palladium-catalyzed interannular C-H amination of biaryl amines. Chem Commun (Camb) 2022; 58:13620-13623. [PMID: 36408627 DOI: 10.1039/d2cc05129j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A palladium-catalyzed interannular C-H amination of biaryl amines with O-benzoylhydroxylamines is reported. This reaction undergoes smoothly with operational practicality and good tolerance of functional groups, thereby providing a concise synthesis of 2,2'-diaminobiaryls. Moreover, the readily accessible scale-up synthesis and the ability to transform the products into structurally diverse N-containing heterocycles demonstrate the synthetic potential of this catalytic protocol.
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Affiliation(s)
- Jiaping Wu
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Pengpeng Sun
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Yuwen Hong
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Haitao Yang
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Meihua Xie
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Jitan Zhang
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
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17
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Bruns DL, Stahl SS. Thermodynamic-Kinetic Comparison of Palladium(II)-Mediated Alcohol and Hydroquinone Oxidation. Organometallics 2022; 41:3161-3166. [PMID: 36776986 PMCID: PMC9916251 DOI: 10.1021/acs.organomet.2c00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Palladium(II) catalysts promote oxidative dehydrogenation and dehydrogenative coupling of many organic molecules. Oxidations of alcohols to aldehydes or ketones are prominent examples. Hydroquinone (H2Q) oxidation to benzoquinone (BQ) is conceptually related to alcohol oxidation, but it is significantly more challenging thermodynamically. The BQ/H2Q redox potential is sufficiently high that BQ is often used as an oxidant in Pd-catalyzed oxidation reactions. A recent report (J. Am Chem. Soc. 2020, 142, 19678-19688) showed that certain ancillary ligands can raise the PdII/0 redox potential sufficiently to reverse this reactivity, enabling (L)PdII(OAc)2 to oxidize hydroquinone to benzoquinone. Here, we investigate the oxidation of tert-butylhydroquinone ( t BuH2Q) and 4-fluorobenzyl alcohol (4FBnOH), mediated by (bc)Pd(OAc)2 (bc = bathocuproine). Although alcohol oxidation is thermodynamically favored over H2Q oxidation by more than 400 mV, the oxidation of t BuH2Q proceeds several orders of magnitude faster than 4FBnOH oxidation. Kinetic and mechanistic studies reveal that these reactions feature different rate-limiting steps. Alcohol oxidation proceeds via rate-limiting β-hydride elimination from a PdII-alkoxide intermediate, while H2Q oxidation features rate-limiting isomerization from an O-to-C-bound PdII-hydroquinonate species. The enhanced rate of H2Q oxidation reflects the kinetic facility of O─H relative to C─H bond cleavage.
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Affiliation(s)
- David L Bruns
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue Madison, WI, 53706, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue Madison, WI, 53706, United States
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18
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Meng Y, Gnanamani E, Zare RN. Direct C(sp 3)–N Bond Formation between Toluene and Amine in Water Microdroplets. J Am Chem Soc 2022; 144:19709-19713. [DOI: 10.1021/jacs.2c10032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yifan Meng
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Elumalai Gnanamani
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Richard N. Zare
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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19
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Raju MVN, Reddy GM, Reddy BJ, Rao VJ, Parvathaneni SP. Pd(II) catalyzed regioselective ortho arylation of 2-arylpyridines, 1-phenyl-1H-pyrazoles, and N-pyridinylcarbazoles with diaryliodonium salts. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-02990-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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He L, Xu Y. Palladium‐Catalyzed Alkenyl C−H Bonds Benzoxylation of Benzofurans by Perester. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Li He
- School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. China
| | - Yongjun Xu
- School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. China
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21
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Ji H, Zhan H, Chen S, Fang Z, Zhang Q, Li D. Copper‐catalyzed C(sp
3
)−H/N−H Cross Dehydrogenative Coupling Between Toluene Derivatives and Picolinamides. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Huihui Ji
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068 China
| | - Hongju Zhan
- Hubei Provincial Key Laboratory of Drug Synthesis and Optimization Jingchu University of Technology Jingmen 448000 China
| | - Shumin Chen
- Hubei Provincial Key Laboratory of Drug Synthesis and Optimization Jingchu University of Technology Jingmen 448000 China
| | - Zeguo Fang
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068 China
| | - Qian Zhang
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068 China
| | - Dong Li
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068 China
- Hubei Provincial Key Laboratory of Drug Synthesis and Optimization Jingchu University of Technology Jingmen 448000 China
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22
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Nchioua I, Alsubari A, Mague JT, Ramli Y. Crystal structure and Hirshfeld surface analysis of N-(2,6-di-methyl-phen-yl)-2-[3-hy-droxy-2-oxo-3-(2-oxoprop-yl)indolin-1-yl]acetamide. Acta Crystallogr E Crystallogr Commun 2022; 78:922-925. [PMID: 36072528 PMCID: PMC9443800 DOI: 10.1107/s2056989022007848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
The cup-shaped conformation of the title mol-ecule, C21H22N2O4, is largely determined by an intra-molecular N-H⋯O hydrogen bond. In the crystal, double layers of mol-ecules are formed by O-H⋯O and C-H⋯O hydrogen bonds. A Hirshfeld surface analysis was performed, which confirms the regions that are active for inter-molecular inter-actions.
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Affiliation(s)
- Intissar Nchioua
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | - Abdulsalam Alsubari
- Laboratory of Medicinal Chemistry, Faculty of Clinical Pharmacy, 21 September University, Yemen
| | - Joel T. Mague
- Department of Chemistry, 8 Tulane University, New Orleans, LA 70118, USA
| | - Youssef Ramli
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
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23
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Nayamadi Mahmoodabadi M, Akhlaghinia B. A green methodology for C–S cross-coupling reaction over Cu II attached to magnetic natural talc (γ-Fe 2O 3/talc/Cu II NPs) as a heterogeneous and ligand-free catalyst. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2022.2116635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
| | - Batool Akhlaghinia
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
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24
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Xia T, Xi Y, Ding H, Zhang Y, Fang K, Wu X, Qu J, Chen Y. Palladium(II)-catalyzed enantioselective intermolecular oxidative diarylation of internal enamides. Chem Commun (Camb) 2022; 58:9282-9285. [PMID: 35904065 DOI: 10.1039/d2cc03202c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The construction of vicinal stereogenic centers via the simultaneous formation of two C-C bonds across alkenes under oxidative conditions is a stubborn challenge. Herein, we report a Pd(II)-catalyzed highly enantioselective intermolecular oxidative 1,2-diarylation reaction of internal enamides with aryl boronic acids, enabling the expedient construction of two vicinal stereocenters with excellent diastereo-, and enantioselectivities.
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Affiliation(s)
- Tingting Xia
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Yang Xi
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Haojie Ding
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Yetong Zhang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Ke Fang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Xianqing Wu
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Jingping Qu
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
| | - Yifeng Chen
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
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25
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Missioui M, Guerrab W, Alsubari A, Mague JT, Ramli Y. 2-Azido- N-(4-methylphenyl)acetamide. IUCRDATA 2022; 7:x220621. [DOI: 10.1107/s2414314622006216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 06/13/2022] [Indexed: 11/10/2022] Open
Abstract
The asymmetric unit of the title compound, C9H10N4O, comprises three independent molecules, two pairs of which differ significantly in the rotational orientation of the azido group and one pair having very similar conformations; the N—N—C—C torsion angles are −173.9 (2), −102.7 (2) and −173.6 (2)°. In the crystal, each independent molecule forms N—H...O hydrogen bonds with its glide-plane-related counterparts, forming zigzag chains extending along the c-axis direction.
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26
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Shennan BDA, Berheci D, Crompton JL, Davidson TA, Field JL, Williams BA, Dixon DJ. Branching out: redox strategies towards the synthesis of acyclic α-tertiary ethers. Chem Soc Rev 2022; 51:5878-5929. [PMID: 35770619 DOI: 10.1039/d1cs00669j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Acyclic α-tertiary ethers represent a highly prevalent functionality, common to high-value bioactive molecules, such as pharmaceuticals and natural products, and feature as crucial synthetic handles in their construction. As such their synthesis has become an ever-more important goal in synthetic chemistry as the drawbacks of traditional strong base- and acid-mediated etherifications have become more limiting. In recent years, the generation of highly reactive intermediates via redox approaches has facilitated the synthesis of highly sterically-encumbered ethers and accordingly these strategies have been widely applied in α-tertiary ether synthesis. This review summarises and appraises the state-of-the-art in the application of redox strategies enabling acyclic α-tertiary ether synthesis.
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Affiliation(s)
- Benjamin D A Shennan
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Diana Berheci
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Jessica L Crompton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Timothy A Davidson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Joshua L Field
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Benedict A Williams
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Darren J Dixon
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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27
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Zhou J, Jiang B, Zhao Z, Shibata N. Etherification of Fluoroarenes with Alkoxyboronic Acid Pinacol Esters via C-F Bond Cleavage. Org Lett 2022; 24:5084-5089. [PMID: 35797451 DOI: 10.1021/acs.orglett.2c01864] [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
Potassium-base-mediated defluoroetherification of aryl and heteroaryl fluorides with alkoxyboronic acid pinacol esters under transition-metal-free conditions is reported. This protocol efficiently and safely provides a wide variety of aryl ethers in high yields without using metal catalysts, specific ligands, and harsh conditions to selectively forge Csp2-O bonds via the Csp2-F cleavage. This method can be applied to the late-stage etherification of structurally complex Csp2-fluorides and bioactive alcohols, such as β-estradiol, calciferol, and tocopherol.
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Affiliation(s)
- Jun Zhou
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Bingyao Jiang
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Zhengyu Zhao
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan.,Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan
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28
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Rahman M, Ghosh S, Bhattacherjee D, Zyryanov GV, Bagdi AK, Hajra A. Recent Advances in Microwave‐assisted Cross‐Coupling Reactions. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Matiur Rahman
- Ural Federal University named after the first President of Russia B N Yeltsin: Ural'skij federal'nyj universitet imeni pervogo Prezidenta Rossii B N El'cina Department of Organic and Biomolecular Chemistry RUSSIAN FEDERATION
| | | | - Dhananjay Bhattacherjee
- Ural Federal University named after the first President of Russia B N Yeltsin: Ural'skij federal'nyj universitet imeni pervogo Prezidenta Rossii B N El'cina Department of Organic and Biomolecular Chemistry RUSSIAN FEDERATION
| | - Grigory V. Zyryanov
- Ural Federal University named after the first President of Russia B N Yeltsin: Ural'skij federal'nyj universitet imeni pervogo Prezidenta Rossii B N El'cina Department of Organic and Biomolecular Chemistry RUSSIAN FEDERATION
| | | | - Alakananda Hajra
- Visva-Bharati Chemistry Santiniketan Road 731235 Santiniketan, Bolpur INDIA
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29
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Missioui M, Guerrab W, Nchioua I, El Moutaouakil Ala Allah A, Kalonji Mubengayi C, Alsubari A, Mague JT, Ramli Y. Crystal structure and Hirshfeld surface analysis of 2-chloro- N-(4-methoxyphenyl)acetamide. Acta Crystallogr E Crystallogr Commun 2022; 78:687-690. [PMID: 35855360 PMCID: PMC9260361 DOI: 10.1107/s205698902200576x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 05/28/2022] [Indexed: 11/10/2022]
Abstract
In the title molecule, C9H10ClNO2, the methoxy group lies very close to the plane of the phenyl ring while the acetamido group is twisted out of this plane by 28.87 (5)°. In the crystal, a three-dimensional structure is generated by N—H...O, C—H...O and C—H...Cl hydrogen bonds plus C—H...π(ring) interactions. A Hirshfeld surface analysis of the intermolecular interactions was performed and indicated that C...H/H...C interactions make the largest contribution to the surface area (33.4%).
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30
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Chernyshev VM, Khazipov OV, Shevchenko MA, Pasyukov DV, Burykina JV, Minyaev ME, Eremin DB, Ananikov VP. Discovery of the N–NHC Coupling Process under the Conditions of Pd/NHC- and Ni/NHC-Catalyzed Buchwald–Hartwig Amination. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Victor M. Chernyshev
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, Novocherkassk 346428, Russia
| | - Oleg V. Khazipov
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, Novocherkassk 346428, Russia
| | - Maksim A. Shevchenko
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, Novocherkassk 346428, Russia
| | - Dmitry V. Pasyukov
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, Novocherkassk 346428, Russia
| | - Julia V. Burykina
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
| | - Mikhail E. Minyaev
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
| | - Dmitry B. Eremin
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
| | - Valentine P. Ananikov
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, Novocherkassk 346428, Russia
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia
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31
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Thavaselvan S, Parthasarathy K. Nickel-catalyzed [2 + 2 + 2] benzannulation of alkynes: a new route to the synthesis of highly substituted naphthalenes. Org Biomol Chem 2022; 20:4309-4313. [PMID: 35583045 DOI: 10.1039/d2ob00513a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Ni(II)-catalyzed aromatic homologation of various directing groups with alkynes to afford highly substituted naphthalene products via C-X bond cleavage followed by alkyne insertion and C-H activation is described. This reaction proceeded with a wide range of directing groups such as pyrazoles, imidazopyridines, benzoimidazothiazoles, thiazoles and triazoles with alkynes to afford highly substituted naphthalenes in moderate to good yields. This transformation is promoted by a simple, straightforward combination of a Ni(II)-complex, Zn dust and a base.
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Affiliation(s)
- Sampath Thavaselvan
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, Tamil Nadu, India.
| | - Kanniyappan Parthasarathy
- Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, Tamil Nadu, India.
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32
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Shahid M, Banakar VB, Ganesh PSKP, Gopinath P. Transition‐metal Catalyzed Remote C(sp3)‐H functionalization of carboxylic acid and its derivative. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- M. Shahid
- Indian Institute of Science Education and Research Tirupati Chemistry INDIA
| | | | | | - Purushothaman Gopinath
- Indian Institute of Science Education and Research Chemistry Karkambadi Road 517507 Tirupati INDIA
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33
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Park J, Son J. Cobalt‐Catalyzed C(sp2)–O Bond Formation by Directing Group Assisted C–H Activation. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200465] [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)
- Jinhwan Park
- Dong-A University Chemical Engineering KOREA, REPUBLIC OF
| | - Jongwoo Son
- Dong-A University Chemistry 550beon-gil, Nakdong-daero 49315 Busan KOREA, REPUBLIC OF
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34
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Zeng K, Ye J, Meng X, Dechert S, Simon M, Gong S, Mata RA, Zhang K. Anomeric Stereoauxiliary Cleavage of the C−N Bond of
d
‐Glucosamine for the Preparation of Imidazo[1,5‐a]pyridines. Chemistry 2022; 28:e202200648. [PMID: 35319128 PMCID: PMC9325398 DOI: 10.1002/chem.202200648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Indexed: 11/13/2022]
Abstract
The targeted cleavage of the C−N bonds of alkyl primary amines in sustainable compounds of biomass according to a metal‐free pathway and the conjunction of nitrogen in the synthesis of imidazo[1,5‐a]pyridines are still highly challenging. Despite tremendous progress in the synthesis of imidazo[1,5‐a]pyridines over the past decade, many of them can still not be efficiently prepared. Herein, we report an anomeric stereoauxiliary approach for the synthesis of a wide range of imidazo[1,5‐a]pyridines after cleaving the C−N bond of d‐glucosamine (α‐2° amine) from biobased resources. This new approach expands the scope of readily accessible imidazo[1,5‐a]pyridines relative to existing state‐of‐the‐art methods. A key strategic advantage of this approach is that the α‐anomer of d‐glucosamine enables C−N bond cleavage via a seven‐membered ring transition state. By using this novel method, a series of imidazo[1,5‐a]pyridine derivatives (>80 examples) was synthesized from pyridine ketones (including para‐dipyridine ketone) and aldehydes (including para‐dialdehyde). Imidazo[1,5‐a]pyridine derivatives containing diverse important deuterated C(sp2)−H and C(sp3)−H bonds were also efficiently achieved.
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Affiliation(s)
- Kui Zeng
- Sustainable Materials and Chemistry Georg-August-University of Göttingen Büsgenweg 4 37077 Göttingen Germany
| | - Jin Ye
- Institute of Physical Chemistry Georg-August-University of Göttingen Tammannstraße 6 37077 Göttingen Germany
| | - Xintong Meng
- Sustainable Materials and Chemistry Georg-August-University of Göttingen Büsgenweg 4 37077 Göttingen Germany
| | - Sebastian Dechert
- Institute of Inorganic Chemistry Georg-August-University of Göttingen Tammannstraße 4 37077 Göttingen Germany
| | - Martin Simon
- Institute of Organic and Biomolecular Chemistry Georg-August-University of Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Shuaiyu Gong
- Sustainable Materials and Chemistry Georg-August-University of Göttingen Büsgenweg 4 37077 Göttingen Germany
| | - Ricardo A. Mata
- Institute of Physical Chemistry Georg-August-University of Göttingen Tammannstraße 6 37077 Göttingen Germany
| | - Kai Zhang
- Sustainable Materials and Chemistry Georg-August-University of Göttingen Büsgenweg 4 37077 Göttingen Germany
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35
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Reddy MB, Prasanth K, Anandhan R. Controlled Photochemical Synthesis of Substituted Isoquinoline-1,3,4(2 H)-triones, 3-Hydroxyisoindolin-1-ones, and Phthalimides via Amidyl Radical Cyclization Cascade. Org Lett 2022; 24:3674-3679. [PMID: 35549291 DOI: 10.1021/acs.orglett.2c01296] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a controlled radical cyclization cascade of isoquinoline-1,3,4(2H)-triones, 3-hydroxyisoindolin-1-ones, and phthalimides from o-alkynylated benzamides by metal-free photoredox catalyzed amidyl N-centered radical addition to the C-C triple bond using the proton-coupled electron transfer (PCET) process under mild reaction conditions. A time tunable synthesis of 3-hydroxyisoindolin-1-ones and phthalimides via β-carbonyl-C(sp3) bond cleavage was also achieved under visible light irradiation. A mechanistic rationale for the radical cyclization cascade is supported by various control and quenching experiments as well as EPR studies.
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Affiliation(s)
| | - Kesavan Prasanth
- Department of Organic Chemistry, University of Madras, Chennai-600025, Tamilnadu, India
| | - Ramasamy Anandhan
- Department of Organic Chemistry, University of Madras, Chennai-600025, Tamilnadu, India
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36
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Barboza AA, Dantas JA, Jardim GADM, Ferreira MAB, Costa MO, Chiavegatti A. Recent Advances in Palladium-Catalyzed Oxidative Couplings in the Synthesis/Functionalization of Cyclic Scaffolds Using Molecular Oxygen as the Sole Oxidant. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1701-7397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractOver the past years, Pd(II)-catalyzed oxidative couplings have enabled the construction of molecular scaffolds with high structural diversity via C–C, C–N and C–O bond-forming reactions. In contrast to the use of stoichiometric amounts of more common oxidants, such as metal salts (Cu and Ag) and benzoquinone derivatives, the use of molecular oxygen for the direct or indirect regeneration of Pd(II) species presents itself as a more viable alternative in terms of economy and sustainability. In this review, we describe recent advances on the development of Pd-catalyzed oxidative cyclizations/functionalizations, where molecular oxygen plays a pivotal role as the sole stoichiometric oxidant.1 Introduction2 Oxidative C–C and C–Nu Coupling2.1 Intramolecular Oxidative C–Nu Heterocyclization Reactions2.1.1 C–H Activation2.1.2 Wacker/Aza-Wacker-Type Cyclization2.1.3 Tandem Wacker/Aza-Wacker and Cyclization/Cross-Coupling Reactions2.2 Intermolecular Oxidative C–Nu Heterocoupling Reactions2.3 Intramolecular Oxidative (C–C) Carbocyclization Reactions2.4 Intermolecular Oxidative C–C Coupling Reactions2.4.1 Cyclization Reactions2.4.2 Cross-Coupling Reactions2.4.3 Homo-Coupling Reactions3 Aerobic Dehydrogenative Coupling/Functionalization4 Oxidative C–H Functionalization5 Summary
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37
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Wang L, Li L, Gao Y, Mingli S, Liu J, Li P. Visible‐light‐induced site‐selective difunctionalization of 2,3‐dihydrofuran with quinoxalin‐2(1H)‐ones and peroxides. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lei Wang
- Huaibei Normal University Chemistry 100 Dongshan Road 235000 Huaibei CHINA
| | - Laiqiang Li
- Huaibei Normal University Chemistry Huaibei CHINA
| | - Yanhui Gao
- Huaibei Normal University Chemistry Huaibei CHINA
| | - Sun Mingli
- Huaibei Normal University Chemistry Huaibei CHINA
| | - Jie Liu
- Huaibei Normal University Chemistry Huaibei CHINA
| | - Pinhua Li
- Huaibei Normal University Chemistry Huaibei CHINA
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38
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Saha A, Shankar M, Sau S, Sahoo AK. Multiple annulations of inert C(sp 2)-H bonds with alkynes. Chem Commun (Camb) 2022; 58:4561-4587. [PMID: 35303048 DOI: 10.1039/d2cc00172a] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Transition-metal catalyzed directing group (DG) assisted annulation of inert C-H bonds leads to the formation of complex molecular frameworks from readily accessible substrates. Thus, multiple annulation of less functionalized substrates with unsaturated species leads to the construction of structurally diverse fused poly(hetero)cycles. The directed inert C(arene)-H bond activation and the mode of TM-migration in this process could enabled obatining L-type [involves DG heteroatom, o-C(arene)-H bond, and C(arene)-H bond of aryl-motif in alkyne], Y-type [involves two heteroatoms of the DG and o-,o'-C(arene)-H bonds], and B-type [involves o-C(arene)-H bond and m-C(arene)-H bond] π-extended annulation products. The coordination preference of the DG heteroatom makes the transformation chemo- and regio-selective. This article underlines the conceptual development of unsymmetrical multiple annulation of arene C(sp2)-H bonds with alkynes, which is exceedingly appealing and highly important.
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Affiliation(s)
- Arijit Saha
- School of Chemistry, University of Hyderabad, Hyderabad, Telangana - 500046, India.
| | - Majji Shankar
- School of Chemistry, University of Hyderabad, Hyderabad, Telangana - 500046, India.
| | - Somratan Sau
- School of Chemistry, University of Hyderabad, Hyderabad, Telangana - 500046, India.
| | - Akhila K Sahoo
- School of Chemistry, University of Hyderabad, Hyderabad, Telangana - 500046, India.
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39
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Ustimenko YP, Agafontsev AM, Tkachev AV. Synthesis of chiral pinopyridines using catalysis by metal complexes. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03066-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Su YT, Yin ZC, Wang GW. Palladium-Catalyzed Three-Component 1,4-Alkoxyarylation Reaction of [60]Fullerene. J Org Chem 2022; 87:4051-4060. [PMID: 35201777 DOI: 10.1021/acs.joc.1c02853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The palladium-catalyzed three-component alkoxyarylation reaction of [60]fullerene with primary/secondary alcohols and aryl iodides generates a series of 1,4-(alkoxy)(aryl)[60]fullerene derivatives. Plausible reaction pathways for the formation of 1,4-(alkoxy)(aryl)[60]fullerenes are proposed. In addition, the electrochemical properties of the synthesized 1,4-alkoxyarylation adducts are investigated.
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Affiliation(s)
- Yi-Tan Su
- Department of Medical Imaging, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001, P. R. China.,Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zheng-Chun Yin
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Guan-Wu Wang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
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41
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Microwave-Assisted Synthesis of 2-Methyl-1H-indole-3-carboxylate Derivatives via Pd-Catalyzed Heterocyclization. Symmetry (Basel) 2022. [DOI: 10.3390/sym14030435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Indole moiety is well-known as a superlative framework in many natural products and synthetic pharmaceuticals. Herein, we report an efficient procedure to synthesize a series of functionalized 2-methyl-1H-indole-3-carboxylate derivatives from commercially available anilines properly functionalized by different electron-withdrawing and -donating groups through a palladium-catalyzed intramolecular oxidative coupling. The conversion of a variety of enamines into the relevant indole was optimized by exposing the neat mixture of reactants to microwave irradiation, obtaining the desired products in excellent yields and high regioselectivity. The synthesized compounds were confirmed by 1H and 13C spectroscopic means as well as by high-resolution mass spectrometry.
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42
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Visible light-driven efficient palladium catalyst turnover in oxidative transformations within confined frameworks. Nat Commun 2022; 13:928. [PMID: 35177599 PMCID: PMC8854557 DOI: 10.1038/s41467-022-28474-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 01/07/2022] [Indexed: 11/08/2022] Open
Abstract
Palladium catalyst turnover by reoxidation of a low-valent Pd species dominates the proceeding of an efficient oxidative transformation, but the state-of-the-art catalysis approaches still have great challenges from the perspectives of high efficiency, atom-economy and environmental-friendliness. Herein, we report a new strategy for addressing Pd reoxidation problem by the fabrication of spatially proximate IrIII photocatalyst and PdII catalyst into metal-organic framework (MOF), affording MOFs based Pd/photoredox catalysts UiO-67-Ir-PdX2 (X = OAc, TFA), which are systematically evaluated using three representative Pd-catalyzed oxidation reactions. Owing to the stabilization of single-site Pd and Ir catalysts by MOFs framework as well as the proximity of them favoring fast electron transfer, UiO-67-Ir-PdX2, under visible light, exhibits up to 25 times of Pd catalyst turnover number than the existing catalysis systems. Mechanism investigations theoretically corroborate the capability of MOFs based Pd/photoredox catalysis to regulate the competitive processes of Pd0 aggregation and reoxidation in Pd-catalyzed oxidation reactions.
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43
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Mekheimer RA, Abd-Elmonem M, Abou Elsebaa M, Nazmy MH, Sadek KU. Recent developments in the green synthesis of biologically relevant cinnolines and phthalazines. PHYSICAL SCIENCES REVIEWS 2022; 0. [DOI: 10.1515/psr-2021-0091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Abstract
Both cinnolines and phthalazines are heterocyclic compounds which have a wide range of biological activities and pharmacological profiles. This work represents the recent advances in the green synthesis of cinnolines and phthalazines as 1,2 and 2,3-diazanaphalenes were cited. The docking studies and mode of action for key scaffolds were also reported.
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Affiliation(s)
| | - Mohamed Abd-Elmonem
- Chemistry Department , Faculty of Science, Minia University , Minia 61519 , Egypt
| | - Mohamed Abou Elsebaa
- Chemistry Department , Faculty of Science, Minia University , Minia 61519 , Egypt
| | - Maiiada Hassan Nazmy
- Biochemistry Department , Faculty of Pharmacy, Minia University , Minia 61519 , Egypt
| | - Kamal Usef Sadek
- Chemistry Department , Faculty of Science, Minia University , Minia 61519 , Egypt
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44
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Tahara K, Takezaki S, Ozawa Y, Abe M. Synthesis of an Organometallic Alkyl-Co(III) Complex with Amidoquinoline Directing Groups via C(sp3)-H Activation and its UV-vis/NMR Spectroscopic, Crystallographic, DFT, and Electrochemical Studies. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20210425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Keishiro Tahara
- Department of Material Science, Graduate School of Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Shun Takezaki
- Department of Material Science, Graduate School of Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Yoshiki Ozawa
- Department of Material Science, Graduate School of Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Masaaki Abe
- Department of Material Science, Graduate School of Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
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45
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Zhang B, Deng W, Xu Z. Mechanism of Ligand‐Controlled Chemoselectivity‐Switchable Ni‐Catalyzed C−N Cross‐Coupling of Amine. ChemistrySelect 2022. [DOI: 10.1002/slct.202103723] [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)
- Bo Zhang
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai 201418 P.R. China
| | - Wei Deng
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai 201418 P.R. China
| | - Zheng‐Yang Xu
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai 201418 P.R. China
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46
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Xie Q, Zhang X, Liu H, Zhang F, Luo X, Luo H. Copper‐Catalyzed N‐Arylation of Indoles and Anilines with Aryltrialkoxysilanes. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Qi Xie
- Gannan Normal University Department of Chemistry & Chemical Engineering CHINA
| | - Xiuqi Zhang
- Gannan Normal University Department of Chemistry & Chemical Engineering CHINA
| | - Huijin Liu
- Gannan Normal University Department of Chemistry &Chemical Engineering CHINA
| | - Fukuan Zhang
- Gannan Normal University Department of Chemistry & Chemical Engineer CHINA
| | - Xuzhong Luo
- Gannan Normal University Department of Chemistry & Chemical Engineering CHINA
| | - Haiqing Luo
- Gannan Normal University Department of Chemistry & Chemical Engineering Economic &Technological Development Zone 341000 Ganzhou CHINA
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47
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Loro C, Molteni L, Papis M, Beccalli EM, Nava D, Presti LL, Brenna S, Colombo G, Foschi F, Broggini G. Direct Synthesis of Fluorescent Oxazolo-phenoxazines by Copper-Catalyzed/Hypervalent Iodine(III)-Mediated Dimerization/Cyclization of 2-Benzylamino-phenols. J Org Chem 2022; 87:1032-1042. [PMID: 35014843 DOI: 10.1021/acs.joc.1c02329] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A dimerization/cyclization reaction of 2-benzylamino-phenols for the direct synthesis of the oxazolo-phenoxazine skeleton is reported. The reaction occurs under copper catalysis in the presence of hypervalent iodine(III), giving selectively the 5H-oxazolo[4,5-b]phenoxazine compounds. The cascade process, which allows the conversion of the substrates into the tetracyclic products, involves three C-H functionalization steps. Initial oxidation of electron-rich arenes by the hypervalent iodine is essential for the dimerization of substrates, whereas the formation of the five-membered rings is promoted by the copper species. 1-Benzyl-2-phenyl-6-(aryl-benzyl)amino-benzimidazoles are regioselectively obtained using N,N'-dibenzyl-phenylenediamines as starting substrates. The fluorescence emission properties of these classes of products have been evaluated.
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Affiliation(s)
- Camilla Loro
- Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Letizia Molteni
- DISFARM, Sezione di Chimica Generale e Organica "A. Marchesini" Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
| | - Marta Papis
- Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Egle M Beccalli
- DISFARM, Sezione di Chimica Generale e Organica "A. Marchesini" Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
| | - Donatella Nava
- DISFARM, Sezione di Chimica Generale e Organica "A. Marchesini" Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy
| | - Leonardo Lo Presti
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Stefano Brenna
- Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Gioele Colombo
- Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Francesca Foschi
- Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Gianluigi Broggini
- Dipartimento di Scienza e Alta Tecnologia, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
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48
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Zhang Q, Deng S, Li D, Shimokawa J, Yorimitsu H. AgF‐Mediated Electrophilic Amination of Alkoxyarylsilanes with Azodicarboxylates. Chem Asian J 2022; 17:e202101345. [DOI: 10.1002/asia.202101345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/29/2021] [Indexed: 11/08/2022]
Affiliation(s)
- Qian Zhang
- Hubei University of Technology School of Materials and Chemical Engineering CHINA
| | - Shijun Deng
- Hubei University of Technology School of Materials and Chemical Engineering CHINA
| | - Dong Li
- Hubei University of Technology School of Materials and Chemical Engineering CHINA
| | - Jun Shimokawa
- Kyoto University , Graduate School of Science Sakyo-ku 606-8502 Kyoto JAPAN
| | - Hideki Yorimitsu
- Kyoto University: Kyoto Daigaku Department of Chemistry, Graduate School of Science JAPAN
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49
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Ondar EE, Burykina JV, Ananikov VP. Evidence for the “cocktail” nature of platinum-catalyzed alkyne and alkene hydrosilylation reactions. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02006d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Evidence of the involvement of a “cocktail”-type catalytic system in the alkyne and alkene hydrosilylation reaction in the presence of platinum on a carbon support is reported.
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Affiliation(s)
- Evgeniia E. Ondar
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospekt 47, Moscow, 119991, Russia
| | - Julia V. Burykina
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospekt 47, Moscow, 119991, Russia
| | - Valentine P. Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospekt 47, Moscow, 119991, Russia
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50
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Zhu X, Jiang M, Li X, Zhu E, Deng Q, Song X, Lv J, Yang D. Alkylsulfonium salts for the photochemical desulphurizative functionalization of heteroarenes. Org Chem Front 2022. [DOI: 10.1039/d1qo01570b] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A metal-free organic photoredox-catalyzed alkylation of heteroarenes using alkylsulfonium salts as alkylation reagents has been developed.
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Affiliation(s)
- Xiaolong Zhu
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Min Jiang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 310036, P. R. China
| | - Xuan Li
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Enjie Zhu
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Qirong Deng
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Xiuyan Song
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Jian Lv
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Daoshan Yang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
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