1
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Zhang ZX, Zhang B, Yuan M, Zhao PF, Da CS. Pd(II)-Catalyzed C4-Selective Alkynylation of Indoles by a Transient Directing Group. Org Lett 2024. [PMID: 39106047 DOI: 10.1021/acs.orglett.4c01970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
With alanine as a transient directing group, Pd-catalyzed regioselective alkynylation at the indole C4-position was successfully established in a good yield. The total synthesis of the PAF antagonist demonstrated the synthetic utility of this protocol. The regioselectivity was explicitly proven by the prepared C4-selective palladacycle intermediate in the catalytic process and the DFT calculation of the energy barriers of C4- and C2-site-selective C-H activation of indole.
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Affiliation(s)
- Ze-Xuan Zhang
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Bing Zhang
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Meng Yuan
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peng-Fei Zhao
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chao-Shan Da
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Key Lab of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou 730000, P. R. China
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2
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Luo W, Zhang C, Dong L. Rhodium(III)-Catalyzed Annulation Synthesis of Difluorinated Quinazolinone Derivatives Using an Amide Carbonyl as the Directing Group. J Org Chem 2024; 89:9627-9640. [PMID: 38888955 DOI: 10.1021/acs.joc.3c02596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
The use of amide carbonyl groups of substrates as weakly coordinating directing groups has received a significant amount of attention. Recently, difluoromethylene alkynes have been successfully used in fluorination reactions, resulting in the preparation of various fluorine-containing compounds. This work describes a [4+2] annulation method for creating a range of fluorinated quinolino[2,1-b]quinazolinone derivatives. The derivatives are formed through Rh(III)-catalyzed cascade cyclization of 3-phenylquinazolinones and gem-difluoromethylene alkynes.
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Affiliation(s)
- Wen Luo
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Chao Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Lin Dong
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
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3
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Banjare SK, Afreen S, Kong WY, Guo W, Nanda T, Das Adhikari GK, Preeyanka N, Tantillo DJ, Ravikumar PC. Cobalt-Catalyzed Deacylative Ipso-C-C Bond Functionalization: An Approach toward Indole-Acyloins and Its Photophysical Studies. J Org Chem 2024; 89:9187-9197. [PMID: 38904985 DOI: 10.1021/acs.joc.3c01845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Selective functionalization of the indole-C3-C bond with aromatic/heteroaromatic 1,2-diketones has been uncovered for the first time. Cobalt catalyst was found to be an effective catalyst for this unusual transformation. This ipso-C-C bond functionalization occurred in the presence of easily available weakly coordinating groups such as ketone and ester. One of the salient features of this methodology is the in situ generation of water from hexafluoro-2-propanol which acts as a reactant for the removal of the pivaloyl/ester group in a deacylative manner. The plausible mechanism has been supported by DFT calculations. Moreover, photophysical studies show the potential utility of indole-C3-acyloin and indolo-fused carbazole, which could be used in photovoltaic and optoelectronic application.
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Affiliation(s)
- Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Saista Afreen
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Wang-Yeuk Kong
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
| | - Wentao Guo
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
| | - Tanmayee Nanda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Gopal Krushna Das Adhikari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Naupada Preeyanka
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Dean J Tantillo
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
| | - Ponneri C Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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4
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Li T, Chen K, Wang X, Wang Y, Su Y, Guo Y. Mass Spectrometry Rearrangement Ions and Metabolic Pathway-Based Discovery of Indole Derivatives during the Aging Process in Citrus reticulata 'Chachi'. Foods 2023; 13:8. [PMID: 38201037 PMCID: PMC10778486 DOI: 10.3390/foods13010008] [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: 10/31/2023] [Revised: 11/29/2023] [Accepted: 12/11/2023] [Indexed: 01/12/2024] Open
Abstract
The rapid analysis and characterization of compounds using mass spectrometry (MS) may overlook trace compounds. Although targeted analysis methods can significantly improve detection sensitivity, it is hard to discover novel scaffold compounds in the trace. This study developed a strategy for discovering trace compounds in the aging process of traditional Chinese medicine based on MS fragmentation and known metabolic pathways. Specifically, we found that the characteristic component of C. reticulata 'Chachi', methyl N-methyl anthranilate (MMA), fragmented in electrospray ionization coupled with collision-induced dissociation (CID) to produce the rearrangement ion 3-hydroxyindole, which was proven to exist in trace amounts in C. reticulata 'Chachi' based on comparison with the reference substance using liquid chromatography-tandem mass spectrometry (LC-MS/MS). Combining the known metabolic pathways of 3-hydroxyindole and the possible methylation reactions that may occur during aging, a total of 10 possible indole derivatives were untargeted predicted. These compounds were confirmed to originate from MMA using purchased or synthesized reference substances, all of which were detected in C. reticulata 'Chachi' through LC-MS/MS, achieving trace compound analysis from untargeted to targeted. These results may contribute to explaining the aging mechanism of C. reticulata 'Chachi', and the strategy of using the CID-induced special rearrangement ion-binding metabolic pathway has potential application value for discovering trace compounds.
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Affiliation(s)
- Tian Li
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China;
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China; (K.C.); (X.W.); (Y.G.)
| | - Ke Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China; (K.C.); (X.W.); (Y.G.)
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China; (K.C.); (X.W.); (Y.G.)
| | - Ying Wang
- Institute for Control of Chinese Traditional Medicine and Ethnic Medicine, National Institutes for Food and Drug Control, No. 31 Huatuo Road, Daxing District, Beijing 102629, China
| | - Yue Su
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, China;
| | - Yinlong Guo
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China; (K.C.); (X.W.); (Y.G.)
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5
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Sarkar S, Biswas A, Das S, Sanyal B, Sahoo R, Samanta R. Weakly coordinating tert-amide assisted Rh(III)-catalyzed C4-cyanation of indoles: application in photophysical studies. Chem Commun (Camb) 2023; 59:11200-11203. [PMID: 37650543 DOI: 10.1039/d3cc03075j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
A rhodium(III)-catalyzed indole C4-selective cyanation is described using the bench-stable, user-friendly electrophilic cyanation agent N-cyano-N-phenyl-p-toluenesulfonamide (NCTS) as a coupling partner. A suitably positioned weakly coordinating tert-amide group was utilized for this site selectivity. The developed protocol proceeded with a broad scope. [Cp*Rh(MeCN)3][SbF6]2 was found to be an effective Rh(III) catalyst for this transformation. An initial study was carried out to know the photophysical properties of the C4-cyanated indole frameworks.
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Affiliation(s)
- Souradip Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Aniruddha Biswas
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Sarbojit Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Bortika Sanyal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Rajkumar Sahoo
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
| | - Rajarshi Samanta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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6
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Ramkumar A, Sreedharan R, Rajeshwaran P, Gandhi T. Ruthenium(II)-catalyzed oxidative dehydrogenation and hydroarylation of maleimides with phthalazinones - insights into additive-controlled product selectivity. Org Biomol Chem 2023; 21:2695-2699. [PMID: 36912076 DOI: 10.1039/d3ob00297g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Herein, we developed ruthenium(II)-catalyzed oxidative dehydrogenation and hydroarylation of maleimides with phthalazinones. The product selectivity is controlled by the additives, and the hydroarylated product was obtained in water, which is an important highlight of this study. Control experiments were conducted to elucidate a plausible mechanism. These experiments suggest the occurrence of an oxidative dehydrogenation pathway over E2-type elimination - the key step in producing Heck-type products.
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Affiliation(s)
- Alagumalai Ramkumar
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu-632014, India.
| | - Ramdas Sreedharan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu-632014, India.
| | - Purushothaman Rajeshwaran
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu-632014, India.
| | - Thirumanavelan Gandhi
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu-632014, India.
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7
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Hwang DJ, He Y, Ponnusamy S, Thiyagarajan T, Mohler ML, Narayanan R, Miller DD. Metabolism-Guided Selective Androgen Receptor Antagonists: Design, Synthesis, and Biological Evaluation for Activity against Enzalutamide-Resistant Prostate Cancer. J Med Chem 2023; 66:3372-3392. [PMID: 36825758 PMCID: PMC10243532 DOI: 10.1021/acs.jmedchem.2c01858] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
A major challenge for new drug discovery in the area of androgen receptor (AR) antagonists lies in predicting the druggable properties that will enable small molecules to retain their potency and stability during further studies in vitro and in vivo. Indole (compound 8) is a first-in-class AR antagonist with very high potency (IC50 = 0.085 μM) but is metabolically unstable. During the metabolic studies described herein, we synthesized new small molecules that exhibit significantly improved stability while retaining potent antagonistic activity for an AR. This structure-activity relationship (SAR) study of more than 50 compounds classified with three classes (Class I, II, and III) and discovered two compounds (32c and 35i) that are potent AR antagonists (e.g., IC50 = 0.021 μM, T1/2 = 120 min for compound 35i). The new antagonists exhibited improved in vivo pharmacokinetics (PK) with high efficacy antiandrogen activity in Hershberger and antiandrogen Enz-Res tumor xenograft models that overexpress AR (LNCaP-AR).
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Affiliation(s)
- Dong-Jin Hwang
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Yali He
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Suriyan Ponnusamy
- Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Thirumagal Thiyagarajan
- Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Michael L Mohler
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Ramesh Narayanan
- Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
| | - Duane D Miller
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, Tennessee 38163, United States
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8
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Banjare SK, Saxena A, Nanda T, Prusty N, Joshi S, Ravikumar PC. Weak-Chelation Assisted Cobalt-Catalyzed C-H Bond Activation: An Approach Toward Regioselective Ethynylation of N-Aryl γ-Lactam. Org Lett 2023; 25:251-255. [PMID: 36580352 DOI: 10.1021/acs.orglett.2c04098] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The sustainable C-H bond ethynylation of N-aryl γ-lactam has been achieved in a highly regioselective manner. In this protocol, earth-abundant cobalt(III)-catalyst was found to be effective, triggering the C-H metalation using a weakly coordinating lactam group. Herein, the ortho-(sp2)-H ethynylation has been obtained regioselectively. The mechanistic studies reveal the non-involvement of the radical pathway for this conversion. However, the parallel kinetic isotope experiment suggests that the C-H bond activation is involved in the rate-determining step. In addition, the synthetic utility of ethynylated N-aryl γ-lactam has been demonstrated for many useful transformations.
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Affiliation(s)
- Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050 India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Annapurna Saxena
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050 India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Tanmayee Nanda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050 India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Namrata Prusty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050 India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Sofaya Joshi
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050 India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Ponneri C Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Odisha 752050 India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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9
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Zeng C, He Y, Li Q, Dong L. Ir(III)-Catalyzed Novel Three-Component Cascade Trifluoroethoxylation and One-Pot Method to Construct Complex Amide Compounds. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202210033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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10
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Chen Y, Lv M, Zhang Y, Wu Y, Ying L, Tang J, Gong X, Zhou J, Song Z. C-H Diselenation and Monoselenation of Electron-Deficient Alkenes via Radical Coupling at Room Temperature. J Org Chem 2022; 87:16175-16187. [PMID: 36473161 DOI: 10.1021/acs.joc.2c01567] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A new, simple, and metal-free route for the diselenation of maleimides has been first developed employing (bis(trifluoroacetoxy)iodo)benzene (PIFA) at room temperature. The present method is compatible with different functional groups, and various diselenyl maleimides were obtained in moderate to excellent yields. Moreover, this protocol further highlights the unique practical application for the functionalization of biologically relevant molecules and amino acid derivatives. Preliminary mechanism studies suggest that radicals may be involved in this novel transformation. Additionally, this protocol is also applicable for the monoselenation of maleimides by switching the reaction conditions and selenation of other electron-deficient alkenes.
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Affiliation(s)
- Yao Chen
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Mengxia Lv
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Yuxin Zhang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Yao Wu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Linkun Ying
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Jielin Tang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Xiangnan Gong
- Analytical and Testing Center, Chongqing University, Chongqing 401331, China
| | - Jianmin Zhou
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Zengqiang Song
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
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11
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Sandeep K, Kumar AS, Kumara Swamy KC. Rhodium‐Catalyzed Vinyl Sulfonylation of 3‐Carbonyl‐Substituted Indoles with Ethenesulfonyl Fluoride by Cross‐Dehydrogenative Coupling: An Application in (3+2) Cycloaddition. European J Org Chem 2022. [DOI: 10.1002/ejoc.202201037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- K. Sandeep
- School of Chemistry University of Hyderabad Gachibowli Hyderabad 5000046 Telangana State India
| | - A. Sanjeeva Kumar
- School of Chemistry University of Hyderabad Gachibowli Hyderabad 5000046 Telangana State India
| | - K. C. Kumara Swamy
- School of Chemistry University of Hyderabad Gachibowli Hyderabad 5000046 Telangana State India
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12
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Li JF, Yin B, Wang JJ. Mechanistic Insights into Cobalt-Catalyzed Regioselective C4-Alkenylation of 3-Acetylindole: A Detailed Theoretical Study. J Org Chem 2022; 87:14125-14136. [PMID: 36256734 DOI: 10.1021/acs.joc.2c01696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A detailed mechanistic study of Co(III)-catalyzed C4-alkenylation of 3-acetylindole (1a) was done based on calculations at density functional theory (DFT) and correlated wave function levels. The whole catalytic cycle consists of four steps: C-H activation, olefin insertion, β-hydride elimination, and regeneration of the catalyst. The theoretical results support olefin insertion as the rate-determining step leading to the experimentally observed regioselectivity of the C4 site over the C2 site. By the analysis of three-dimensional (3D) geometries and the NCl plot, the preference for the C4 site over the C2 site could be attributed to the weaker repulsive interaction between the indole moiety and olefin in the transition states of the olefin insertion step for the former. The reliability of the theoretical mechanistic results is further confirmed through the DFT calculation of other related indole derivatives and olefin substrates.
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Affiliation(s)
- Jin-Feng Li
- College of Chemistry & Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an University, Yan'an 716000, China
| | - Bing Yin
- Lab of Theoretical Molecular Magnetism (LTMM), College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Ji-Jiang Wang
- College of Chemistry & Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an University, Yan'an 716000, China
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13
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Liu SL, Ye C, Wang X. Recent advances in transition-metal-catalyzed directed C-H alkenylation with maleimides. Org Biomol Chem 2022; 20:4837-4845. [PMID: 35635524 DOI: 10.1039/d2ob00604a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Transition-metal-catalyzed directed C-H alkenylation with maleimides has attracted much attention in recent years, as maleimide core moieties are present in various natural products and pharmaceuticals. In addition, these derivatives can be readily modified into biologically important compounds including succinimides, pyrrolidines and γ-lactams. The efficient chelation-assisted inert C-H bond activation strategy provides straightforward access to a wide array of structurally diverse molecules containing maleimide units. This review describes the major progress and mechanistic investigations on Heck-type reaction/cyclization of maleimides with organic molecules until early 2022.
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Affiliation(s)
- Shuang-Liang Liu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Kexue avenue 136, Zhengzhou, 450001, P.R. China.
| | - Changchun Ye
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Kexue avenue 136, Zhengzhou, 450001, P.R. China.
| | - Xiaoge Wang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Kexue avenue 136, Zhengzhou, 450001, P.R. China.
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14
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Taskesenligil Y, Aslan M, Cogurcu T, Saracoglu N. Directed C-H Functionalization of C3-Aldehyde, Ketone, and Acid/Ester-Substituted Free (NH) Indoles with Iodoarenes via a Palladium Catalyst System. J Org Chem 2022; 88:1299-1318. [PMID: 35609297 PMCID: PMC9903333 DOI: 10.1021/acs.joc.2c00716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Pd(II)-catalyzed C-H arylations of free (NH) indoles including different carbonyl directing groups on C3-position with aryl iodides are demonstrated. Importantly, the reactions are carried out using the same catalyst system without any additional transient directing group (TDG). In this study, the formyl group as a directing group gave the C4-arylated indoles versus C2-arylation. Using this catalyst system, C-H functionalization of 3-acetylindoles provided domino C4-arylation/3,2-carbonyl migration products. This transformation involves the unusual migration of the acetyl group to the C2-position following C4-arylation in one pot. Meanwhile, migration of the acetyl group could be simply controlled and N-protected 3-acetylindoles afforded C4-arylation products without migration of the acetyl group. Functionalization of indole-3-carboxylic acid (or methyl ester) with aryl iodides using the present Pd(II)-catalyst system resulted in decarboxylation followed by the formation of C2-arylated indoles. Based on the control experiments and the literature, plausible mechanisms are proposed. The synthetic utilities of these acetylindole derivatives have also been demonstrated. Remarkably, C4-arylated acetylindoles have allowed the construction of functionalized pityiacitrin (a natural product).
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15
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Mandal R, Garai B, Sundararaju B. Weak-Coordination in C–H Bond Functionalizations Catalyzed by 3d Metals. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05267] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Rajib Mandal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh208016, India
| | - Bholanath Garai
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh208016, India
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16
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Liu YZ, Zeng YF, Shu B, Zheng YC, Xiao L, Chen SY, Song JL, Zhang X, Zhang SS. Rh( iii)-Catalyzed dienylation and cyclopropylation of indoles at the C4 position with alkylidenecyclopropanes. Org Chem Front 2022. [DOI: 10.1039/d2qo00763k] [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
Herein, we report a Rh(iii)-catalyzed C–H functionalization of indoles at the C4 position with alkylidenecyclopropanes (ACPs).
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Affiliation(s)
- Yan-Zhi Liu
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Yao-Fu Zeng
- School of Pharmaceutical Science, Hunan Provincial Key Laboratory of Tumor Microenvironment Responsive Drug Research, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Bing Shu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, PR China
| | - Yi-Chuan Zheng
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Lin Xiao
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Shao-Yong Chen
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Jia-Lin Song
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Xuanxuan Zhang
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Shang-Shi Zhang
- Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou, 510006, China
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17
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Wang M, Zhang J, Wang H, Ma B, Dai HX. Construction of Aza-spiro[4,5]indole Scaffolds via Rhodium-Catalyzed Regioselective C(4)—H Activation of Indole ※. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a21120588] [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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18
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Chandra D, Manisha, Sharma U. Recent Advances in the High-Valent Cobalt-Catalyzed C-H Functionalization of N-Heterocycles. CHEM REC 2021; 22:e202100271. [PMID: 34932274 DOI: 10.1002/tcr.202100271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/21/2021] [Indexed: 12/18/2022]
Abstract
Direct functionalization of heterocycles using C-H activation widely relies on the precious metal complexes. In past decade, the use of earth abundant and inexpensive transition metal to functionalize heterocycles has become an attractive alternate strategy. This concept is also interesting due to the unique reactivity pattern of these inexpensive metals. In this context we and other research groups have utilized the high-valent cobalt complexes as an inexpensive and readily available catalyst for the functionalization of heterocycles. In this review, we intend to brief recent progress made in the area of high-valent cobalt complexes catalyzed C-H functionalization of N-containing heterocycles.
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Affiliation(s)
- Devesh Chandra
- Chemical Technology Division, CSIR-IHBT, Palampur, HP 176 061, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Manisha
- Chemical Technology Division, CSIR-IHBT, Palampur, HP 176 061, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Upendra Sharma
- Chemical Technology Division, CSIR-IHBT, Palampur, HP 176 061, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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19
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Jadhav PP, Kahar NM, Dawande SG. Ruthenium(II)-Catalyzed Highly Chemo- and Regioselective Oxidative C6 Alkenylation of Indole-7-carboxamides. Org Lett 2021; 23:8673-8677. [PMID: 34723545 DOI: 10.1021/acs.orglett.1c02948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We disclosed the first efficient method for highly chemo- and regioselective C6 alkenylation of indole-7-carboxamides using inexpensive Ru(II) catalyst through chelation assisted C-H bond activation. Electronically diverse indole-7-carboxamides and alkenes react efficiently to produce a wide range of C6 alkenyl indole derivatives. Further the C6 alkenyl indole-7-carboxamides modified to their derivatives through simple chemical transformations. The observed regioselectivity and kinetics has been evidenced by deuterium incorporation and intermolecular competitive studies. In addition, for mechanistic insights, the intermediates were analyzed by HRMS.
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Affiliation(s)
- Pankaj P Jadhav
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India
| | - Nilesh M Kahar
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India
| | - Sudam G Dawande
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India
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20
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Sheng Y, Gao Y, Duan B, Lv M, Chen Y, Yang M, Zhou J, Liang G, Song Z. Rhodium(III)‐Catalyzed Direct C7‐Selective Alkenylation and Alkylation of Indoles with Maleimides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yaoguang Sheng
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Yi Gao
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Bingbing Duan
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Mengxia Lv
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Yao Chen
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Mengjie Yang
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Jianmin Zhou
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Guang Liang
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
| | - Zengqiang Song
- School of Pharmaceutical Sciences Wenzhou Medical University Wenzhou Zhejiang 325035 People's Republic of China
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21
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Zhang S, Liu Y, Zheng Y, Xie H, Chen S, Song J, Shu B. Rhodium(III)‐Catalyzed Regioselective C−H Allylation and Prenylation of Indoles at C4‐Position. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100882] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shang‐Shi Zhang
- Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Yan‐Zhi Liu
- Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Yi‐Chuan Zheng
- Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Hui Xie
- Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Shao‐Yong Chen
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center Guangdong Pharmaceutical University Zhongshan 528458 People's Republic of China
| | - Jia‐Lin Song
- Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Bing Shu
- School of Pharmacy Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
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22
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Amide-based xanthine oxidase inhibitors bearing an N-(1-alkyl-3-cyano-1H-indol-5-yl) moiety: Design, synthesis and structure-activity relationship investigation. Bioorg Chem 2021; 117:105417. [PMID: 34673452 DOI: 10.1016/j.bioorg.2021.105417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/21/2021] [Accepted: 10/06/2021] [Indexed: 12/29/2022]
Abstract
Our previous work identified a promising isonicotinamide based xanthine oxidase (XO) inhibitor, N-(3-cyano-4-((2-cyanobenzyl)oxy)phenyl)isonicotinamide (1), and concluded that amide is an effective linker in exploring the XO inhibitor chemical space that is completely different from the five-membered ring framework of febuxostat and topiroxostat. Indole, an endogenous bioactive substance and a popular drug construction fragment, was involved in the structural optimization campaign of the present effort. After the installation of some functional groups, N-(1-alkyl-3-cyano-1H-indol-5-yl) was generated and employed to mend the missing H-bond interaction between the 3'-cyano of 1 and Asn768 residue of XO by shortening their distance. In this context, eight kinds of heterocyclic aromatic amide chemotypes were rationally designed and synthesized to investigate the structure-activity relationship (SAR) of amide-based XO inhibitors. The optimized compound a6 (IC50 = 0.018 μM) exhibits 17.2-fold improved potency than the initial compound 1 (IC50 = 0.31 μM). Its potency is comparable to that of topiroxostat (IC50 = 0.013 μM). Molecular docking and molecular dynamics studies proved the existence of the stable H-bond between the cyano group and the Asn768 residue. Moreover, oral administration of a6 (11.8 mg/kg) could effectively reduce serum uric acid levels in an acute hyperuricemia rat model. Liver microsomal stability assay illustrated that compound a6 possesses well metabolic stability in rat liver microsomes. However, the in vivo potency of a6 was much lower than that of topiroxostat, which may be explained by the poor absorption found in the parallel artificial membrane permeability assay (PAMPA). In addition, 6a has non-cytotoxicity against normal cell lines MCF10A and 16HBE. Taken together, this work culminated in the identification of compound 6a as an excellent lead for further exploration of amide-based XO inhibitors.
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23
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Faarasse S, El Brahmi N, Guillaumet G, El Kazzouli S. Regioselective C-H Functionalization of the Six-Membered Ring of the 6,5-Fused Heterocyclic Systems: An Overview. Molecules 2021; 26:5763. [PMID: 34641306 PMCID: PMC8510187 DOI: 10.3390/molecules26195763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
The regioselective C-H functionalization of the five-membered ring of the 6,5-fused heterocyclic systems is nowadays well documented due to its high reactivity compared to the six-membered ring. So, developing new procedures of C-H functionalization of the six-membered ring "by thinking out of the box" is extremely challenging, which explains the limited number of reports published to date. This review paper aims to highlight advances achieved in this emerging chemistry research and discusses recently reported methods.
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Affiliation(s)
- Soukaina Faarasse
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
- Institute of Organic and Analytical Chemistry, University of Orleans, UMR CNRS 7311, BP 6759, CEDEX 2, 45067 Orleans, France
| | - Nabil El Brahmi
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
| | - Gérald Guillaumet
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
- Institute of Organic and Analytical Chemistry, University of Orleans, UMR CNRS 7311, BP 6759, CEDEX 2, 45067 Orleans, France
| | - Saïd El Kazzouli
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
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24
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Ankade SB, Samal PP, Soni V, Gonnade RG, Krishnamurty S, Punji B. Ni(II)-Catalyzed Intramolecular C–H/C–H Oxidative Coupling: An Efficient Route to Functionalized Cycloindolones and Indenoindolones. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03314] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shidheshwar B. Ankade
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pragnya Paramita Samal
- Physical and Materials Chemistry Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Vineeta Soni
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajesh G. Gonnade
- Centre for Material Characterization, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
| | - Sailaja Krishnamurty
- Physical and Materials Chemistry Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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25
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Banjare SK, Nanda T, Pati BV, Adhikari GKD, Dutta J, Ravikumar PC. Breaking the Trend: Insight into Unforeseen Reactivity of Alkynes in Cobalt-Catalyzed Weak Chelation-Assisted Regioselective C(4)–H Functionalization of 3-Pivaloyl Indole. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02689] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Odisha 752050, India
| | - Tanmayee Nanda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Odisha 752050, India
| | - Bedadyuti Vedvyas Pati
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Odisha 752050, India
| | - Gopal Krushna Das Adhikari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Odisha 752050, India
| | - Juhi Dutta
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Odisha 752050, India
| | - Ponneri C. Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, Odisha 752050, India
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26
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Herbort JH, Lalisse RF, Hadad CM, RajanBabu TV. Cationic Co(I) Catalysts for Regiodivergent Hydroalkenylation of 1,6-Enynes. An Uncommon cis-β-C-H Activation Leads to Z-Selective Coupling of Acrylates. ACS Catal 2021; 11:9605-9617. [PMID: 34745711 DOI: 10.1021/acscatal.1c02530] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Two intermolecular hydroalkenylation reactions of 1,6-enynes are presented which yield substituted 5-membered carbo- and -heterocycles. This reactivity is enabled by a cationic bis-diphenylphosphinopropane (DPPP)CoI species which forms a cobaltacyclopentene intermediate by oxidative cyclization of the enyne. This key species interacts with alkenes in distinct fashion, depending on the identity of the coupling partner to give regiodivergent products. Simple alkenes undergo insertion reactions to furnish 1,3-dienes whereby one of the alkenes is tetrasubstituted. When acrylates are employed as coupling partners, the site of intermolecular C-C formation shifts from the alkyne to the alkene motif of the enyne, yielding Z-substituted-acrylate derivatives. Computational studies provide support for our experimental observations and show that the turnover-limiting steps in both reactions are the interactions of the alkenes with the cobaltacyclopentene intermediate via either a 1,2-insertion in the case of ethylene, or an unexpected β-C-H activation in the case of most acrylates. Thus, the H syn to the ester is activated through the coordination of the acrylate carbonyl to the cobaltacycle intermediate, which explains the uncommon Z-selectivity and regiodivergence. Variable time normalization analysis (VTNA) of the kinetic data reveals a dependance upon the concentration of cobalt, acrylate, and activator. A KIE of 2.1 was observed with methyl methacrylate in separate flask experiments, indicating that C-H cleavage is the turnover-limiting step in the catalytic cycle. Lastly, a Hammett study of aryl-substituted enynes yields a ρ value of -0.4, indicating that more electron-rich substituents accelerate the rate of the reaction.
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Affiliation(s)
- James H. Herbort
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Remy F. Lalisse
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Christopher M. Hadad
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - T. V. RajanBabu
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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27
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Mandal R, Garai B, Sundararaju B. Cp*Co III-Catalyzed C(7)-H Bond Annulation of Indolines with Alkynes. J Org Chem 2021; 86:9407-9417. [PMID: 34213334 DOI: 10.1021/acs.joc.1c00713] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An efficient protocol for the synthesis of biologically essential pyrroloquinolinones has been developed under Cp*CoIII catalysis, which involves a cascade reaction of C(7)-H alkenylation with alkynes followed by nucleophilic addition. A wide variety of internal alkynes including enyne, diyne, and ynamide and more challenging terminal alkynes were successfully employed for the annulation in good to excellent yield with high regioselectivity.
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Affiliation(s)
- Rajib Mandal
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India 208016
| | - Bholanath Garai
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India 208016
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India 208016
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28
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Sonowal P, Bhorali P, Sultana S, Gogoi S. Pd(ii)-Catalyzed regioselective functionalization of antipyrines: synthesis of pyrazolono-maleimides and pyrazolono-quinones. Org Biomol Chem 2021; 19:5333-5341. [PMID: 34042935 DOI: 10.1039/d1ob00819f] [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
A Pd(ii)-catalyzed direct functionalization reaction of the 4Csp2-H bond of antipyrine derivatives is reported. This metal-catalyzed reaction of antipyrines with maleimides provided an easy and efficient access to biologically important pyrazolonomaleimides. This catalytic system is also applicable for C-4 functionalization of the antipyrine ring with quinone derivatives.
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Affiliation(s)
- Priya Sonowal
- Applied Organic Chemistry, Chemical Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, AcSIR, Ghaziabad-201002, India.
| | - Pratiksha Bhorali
- Applied Organic Chemistry, Chemical Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, AcSIR, Ghaziabad-201002, India.
| | - Sabera Sultana
- Applied Organic Chemistry, Chemical Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, AcSIR, Ghaziabad-201002, India.
| | - Sanjib Gogoi
- Applied Organic Chemistry, Chemical Sciences & Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, AcSIR, Ghaziabad-201002, India.
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29
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Banjare SK, Nanda T, Pati BV, Biswal P, Ravikumar PC. O-Directed C-H functionalization via cobaltacycles: a sustainable approach for C-C and C-heteroatom bond formations. Chem Commun (Camb) 2021; 57:3630-3647. [PMID: 33870349 DOI: 10.1039/d0cc08199j] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review focuses on providing comprehensive highlights of the recent advances in the field of cobalt-catalysed C-H functionalization and related synthetic concepts, relying on these through oxygen atom coordination. In recent years, 3d transition metal (Fe, Co, Cu & Ni) catalysed C-H functionalization reactions have received immense attention on account of its higher abundance and low cost, as compared to noble metals such as Ir, Rh, Ru and Pd. Among the first-row transition metals, cobalt is one of the extensively used metals for sustainable synthesis due to its unique reactivity towards the functionalization of inert C-H bonds. The functionalization of the inert C-H bond necessitates a proximal directing group. In this context, strongly coordinating nitrogen atom directed C-H functionalizations have been well explored. Nevertheless, strongly coordinating nitrogen-containing scaffolds, such as pyridine, pyrimidine, and 8-aminoquinoline, have to be installed and removed in a separate process. In contrast, C-H functionalizations through weakly coordinating atoms, such as oxygen, are largely underdeveloped. Since the oxygen atom is a part of many readily available functional groups, such as aldehydes, ketones, carboxylic acids, and esters, it could be used as directing groups for selective C-H functionalization reactions without any modification. Thus, the use of 3d transition metals, such as cobalt, along with weakly coordinating (oxygen) directing groups for C-H functionalization reactions are more sustainable, especially for the large-scale production of pharmaceuticals in industries. During the last decade, notable progress has been made using this concept. Nonetheless, almost all the reports are restricted to the formation of C-C and C-N bond. Therefore, there is a wide scope for developing this area for the formation of other bonds, such as C-X (halogens), C-B, C-S, and C-Se.
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Affiliation(s)
- Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) HBNI, Bhubaneswar, Odisha 752050, India.
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30
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Cobalt-catalyzed C H activation of N-carbamoyl indoles or benzamides with maleimides: Synthesis of imidazo[1,5-a]indole- or isoindolone-incorporated spirosuccinimides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152872] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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31
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Sahoo S, Pal S. Rapid Access to Benzimidazo[1,2- a]quinoline-Fused Isoxazoles via Pd(II)-Catalyzed Intramolecular Cross Dehydrogenative Coupling: Synthetic Versatility and Photophysical Studies. J Org Chem 2021; 86:4081-4097. [PMID: 33626283 DOI: 10.1021/acs.joc.0c02926] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
An efficient and atom-economical palladium-catalyzed intramolecular cross dehydrogenative coupling (CDC) reaction has been developed for the construction of highly π-conjugated benzimidazo[1,2-a]quinoline-fused isoxazole scaffolds using molecular oxygen as sole oxidant. The approach portrayed wide substrate scope with good functional group tolerance and depicted a useful tool for the generation of fluorescence active compounds with high quantum yield. Synthetic versatility of the method via Fe-catalyzed reductive isoxazole ring cleavage toward pyridine, pyrimidine, pyrazole fused heteropolycyclic compounds has been showcase.
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Affiliation(s)
- Subrata Sahoo
- Organic Chemistry Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Argul, Odisha 752050, India
| | - Shantanu Pal
- Organic Chemistry Laboratory, School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Argul, Odisha 752050, India
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32
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Nanda T, Biswal P, Pati BV, Banjare SK, Ravikumar PC. Palladium-Catalyzed C-C Bond Activation of Cyclopropenone: Modular Access to Trisubstituted α,β-Unsaturated Esters and Amides. J Org Chem 2021; 86:2682-2695. [PMID: 33427445 DOI: 10.1021/acs.joc.0c02700] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Strain-driven palladium/N-heterocyclic carbene-catalyzed C-C bond activation of diphenylcyclopropenone (DPC) has been explored for one-step access to trisubstituted α,β-unsaturated esters and amides. The designed transformation works under mild conditions providing exclusively a single stereoisomer. Mechanistic studies support the oxidative addition of the C-C bond of cyclopropenone to in-situ-generated Pd(0) intermediate. We have proved that vinylic hydrogen in the product is coming from phenol/aniline through deuterium-labeling studies. Late-stage functionalization of bioactive molecules such as procaine, estrone, and hymecromone demonstrates the robustness of this protocol.
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Affiliation(s)
- Tanmayee Nanda
- National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar 752050, India
| | - Pragati Biswal
- National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar 752050, India
| | - Bedadyuti Vedvyas Pati
- National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar 752050, India
| | - Shyam Kumar Banjare
- National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar 752050, India
| | - Ponneri Chandrababu Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar 752050, India
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33
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Shinde VN, Rangan K, Kumar D, Kumar A. Rhodium(III)-Catalyzed Dehydrogenative Annulation and Spirocyclization of 2-Arylindoles and 2-(1H-Pyrazol-1-yl)-1H-indoles with Maleimides: A Facile Access to Isogranulatimide Alkaloid Analogues. J Org Chem 2021; 86:2328-2338. [DOI: 10.1021/acs.joc.0c02467] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Vikki N. Shinde
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Telangana 500078, India
| | - Dalip Kumar
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
| | - Anil Kumar
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Rajasthan 333031, India
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34
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Cheng Y, Yu S, He Y, An G, Li G, Yang Z. C4-arylation and domino C4-arylation/3,2-carbonyl migration of indoles by tuning Pd catalytic modes: Pd(i)-Pd(ii) catalysis vs. Pd(ii) catalysis. Chem Sci 2021; 12:3216-3225. [PMID: 34164090 PMCID: PMC8179361 DOI: 10.1039/d0sc05409g] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 01/07/2021] [Indexed: 12/14/2022] Open
Abstract
Efficient C4-arylation and domino C4-arylation/3,2-carbonyl migration of indoles have been developed. The former route enables C4-arylation in a highly efficient and mild manner and the latter route provides an alternative straightforward protocol for synthesis of C2/C4 disubstituted indoles. The mechanism studies imply that the different reaction pathways were tuned by the distinct acid additives, which led to either the Pd(i)-Pd(ii) pathway or Pd(ii) catalysis.
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Affiliation(s)
- Yaohang Cheng
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University No. 74, Xuefu Road, Nangang District Harbin 150080 People's Republic of China
| | - Shijie Yu
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University No. 74, Xuefu Road, Nangang District Harbin 150080 People's Republic of China
| | - Yuhang He
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University No. 74, Xuefu Road, Nangang District Harbin 150080 People's Republic of China
| | - Guanghui An
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University No. 74, Xuefu Road, Nangang District Harbin 150080 People's Republic of China
| | - Guangming Li
- Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University No. 74, Xuefu Road, Nangang District Harbin 150080 People's Republic of China
| | - Zhenyu Yang
- School of Pharmaceutical and Materials Engineering, Taizhou University 1139 Shifu Avenue Taizhou 318000 China
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35
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Xie G, Zhao Y, Cai C, Deng GJ, Gong H. Palladium-Catalyzed Direct and Specific C-7 Acylation of Indolines with 1,2-Diketones. Org Lett 2021; 23:410-415. [PMID: 33400544 DOI: 10.1021/acs.orglett.0c03922] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The indole scaffold is a ubiquitous and useful substructure, and extensive investigations have been conducted to construct the indole framework and/or realize indole modification. Nevertheless, the direct selective functionalization on the benzenoid core must overcome the high activity of the C-3 position and still remains highly challenging. Herein, a palladium-catalyzed direct and specific C-7 acylation of indolines in the presence of an easily removed directing group was developed. This strategy usually is considered as a practical strategy for the preparation of acylated indoles because indoline can be easily converted to indole under oxidation conditions. In particular, our strategy greatly improved the alkacylation yield of indolines for which only an unsatisfactory yield could be achieved in the previous studies. Furthermore, the reaction can be scaled up to gram level in the standard reaction conditions with a much lower palladium loading (1 mol %).
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Affiliation(s)
- Guilin Xie
- Foshan Green Intelligent Manufacturing Research Institute of Xiangtan University; The Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Yuhan Zhao
- Foshan Green Intelligent Manufacturing Research Institute of Xiangtan University; The Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Changqun Cai
- Foshan Green Intelligent Manufacturing Research Institute of Xiangtan University; The Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Foshan Green Intelligent Manufacturing Research Institute of Xiangtan University; The Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Hang Gong
- Foshan Green Intelligent Manufacturing Research Institute of Xiangtan University; The Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education College of Chemistry, Xiangtan University, Xiangtan 411105, China
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36
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Kumar P, Nagtilak PJ, Kapur M. Transition metal-catalyzed C–H functionalizations of indoles. NEW J CHEM 2021. [DOI: 10.1039/d1nj01696b] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review summarises a wide range of transformations on the indole skeleton, including arylation, alkenylation, alkynylation, acylation, nitration, borylation, and amidation, using transition-metal catalyzed C–H functionalization as the key step.
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Affiliation(s)
- Pravin Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
| | - Prajyot Jayadev Nagtilak
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
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37
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Sharma K, Neog K, Sharma A, Gogoi P. Pd(II)-Catalyzed oxidative alkenylation of 4-hydroxycoumarin with maleimide via a C-H bond activation strategy. Org Biomol Chem 2021; 19:6256-6266. [PMID: 34190290 DOI: 10.1039/d1ob00797a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A Pd(ii)-catalyzed oxidative alkenylation of 4-hydroxycoumarins with maleimides for the synthesis of 4-hydroxy-3-maleimidecoumarins has been described. This methodology proceeds via C-H activation and C(sp2)-C(sp2) bond formation providing a series of alkenylated Heck-type products.
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Affiliation(s)
- Kumud Sharma
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kashmiri Neog
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Abhilash Sharma
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pranjal Gogoi
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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38
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Pradhan S, De PB, Shah TA, Punniyamurthy T. Recent Advances in Metal‐catalyzed Alkylation, Alkenylation and Alkynylation of Indole/indoline Benzenoid Nucleus. Chem Asian J 2020; 15:4184-4198. [DOI: 10.1002/asia.202001159] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/05/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Sourav Pradhan
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati 781039 India
| | - Pinaki Bhusan De
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati 781039 India
| | - Tariq A. Shah
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati 781039 India
- Govt. Srinagar Women's College Zakura Srinagar 190006 India
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39
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Wu L, Song Y, Li Z, Guo J, Yao X. Copper(II)‐Catalysed Aerobic Oxidative Coupling of Arylamines with Hexafluoroisopropanol: An Alternative Methodology for Constructing Fluorinated Compounds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001048] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Liangying Wu
- Department of Applied Chemistry, College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016, People's Republic of China
| | - Yang Song
- Department of Applied Chemistry, College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016, People's Republic of China
| | - Zhanchong Li
- Department of Applied Chemistry, College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016, People's Republic of China
| | - Jiabao Guo
- Department of Applied Chemistry, College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016, People's Republic of China
| | - Xiaoquan Yao
- Department of Applied Chemistry, College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016, People's Republic of China
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40
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Talukdar R. Rapid access to 3-acyl indoles using ethyl acetate/triflic acid couple as the acylium donor and Cu(OAc) 2 catalysed aerial oxidation of indole benzoins. Org Biomol Chem 2020; 18:8876-8880. [PMID: 33103169 DOI: 10.1039/d0ob01977a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Esters are potential acyl donors but are relatively unexplored for that purpose. A facile installation of acyl groups at the C-3 position of indoles under triflic acid catalysed conditions with easily available and cheap esters as new acylating agents is described herein. Furthermore, heterocycles like N-protected pyrrole, furan and thiophene were also suitable substrates for similar C-2 acylation. Analogous C-3 benzoylated products of indole were obtained, albeit in lower yields, by using methyl benzoate as a benzoyl donor. The benzoylated products were synthesised in much better yields via a copper(ii) catalysed aerial oxidation of indole containing benzoins.
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Affiliation(s)
- Ranadeep Talukdar
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India.
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41
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Carral-Menoyo A, Sotomayor N, Lete E. Cp*Co(III)-Catalyzed C-H Hydroarylation of Alkynes and Alkenes and Beyond: A Versatile Synthetic Tool. ACS OMEGA 2020; 5:24974-24993. [PMID: 33043175 PMCID: PMC7542607 DOI: 10.1021/acsomega.0c03639] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/02/2020] [Indexed: 05/03/2023]
Abstract
The use of earth-abundant first-row transition metals, such as cobalt, in C-H activation reactions for the construction and functionalization of a wide variety of structures has become a central topic in synthetic chemistry over the last few years. In this context, the emergence of cobalt catalysts bearing pentamethylcyclopentadienyl ligands (Cp*) has had a major impact on the development of synthetic methodologies. Cp*Co(III) complexes have been proven to possess unique reactivity compared, for example, to their Rh(III) counterparts, obtaining improved chemo- or regioselectivities, as well as yielding new reactivities. This perspective is focused on recent advances on the alkylation and alkenylation reactions of (hetero)arenes with alkenes and alkynes under Cp*Co(III) catalysis.
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Affiliation(s)
- Asier Carral-Menoyo
- Departamento de Química
Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Apdo. 644, 48080 Bilbao, Spain
| | - Nuria Sotomayor
- Departamento de Química
Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Apdo. 644, 48080 Bilbao, Spain
| | - Esther Lete
- Departamento de Química
Orgánica II, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Apdo. 644, 48080 Bilbao, Spain
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42
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Ohara N, Rej S, Chatani N. Rh(I)-catalyzed Addition of the ortho C-H Bond in Aryl Sulfonamides to Maleimides. CHEM LETT 2020. [DOI: 10.1246/cl.200353] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Nozomi Ohara
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Supriya Rej
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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43
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Rong J, Li H, Fu R, Sun W, Loh TP, Jiang Y. Cleavage and Reassembly C≡C Bonds of Ynones to Access Highly Functionalized Ketones. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00381] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jiaxin Rong
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Haowen Li
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Rui Fu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Wangbin Sun
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
| | - Yaojia Jiang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
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44
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Peng J, Li C, Khamrakulov M, Wang J, Liu H. Rhodium(III)-Catalyzed C–H Alkenylation: Access to Maleimide-Decorated Tryptophan and Tryptophan-Containing Peptides. Org Lett 2020; 22:1535-1541. [DOI: 10.1021/acs.orglett.0c00086] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jingjing Peng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Chunpu Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Mirzadavlat Khamrakulov
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Jiang Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Hong Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
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45
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Vivek Kumar S, Banerjee S, Punniyamurthy T. Transition metal-catalyzed coupling of heterocyclic alkenes via C–H functionalization: recent trends and applications. Org Chem Front 2020. [DOI: 10.1039/d0qo00279h] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Heterocyclic alkenes and their derivatives are an important class of reactive feedstock and valuable synthons. This review highlights the transition-metal-catalyzed coupling of heterocyclic alkenes via a C–H functionalization strategy.
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46
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Carral-Menoyo A, Sotomayor N, Lete E. Palladium-catalysed Heck-type alkenylation reactions in the synthesis of quinolines. Mechanistic insights and recent applications. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00789g] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Recent developments in Pd(0)- and Pd(ii)-catalysed alkenylation reactions for the synthesis of quinolines focusing on mechanistic understanding.
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Affiliation(s)
- Asier Carral-Menoyo
- Departamento de Química Orgánica II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 48080 Bilbao
- Spain
| | - Nuria Sotomayor
- Departamento de Química Orgánica II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 48080 Bilbao
- Spain
| | - Esther Lete
- Departamento de Química Orgánica II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 48080 Bilbao
- Spain
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47
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Ghosh AK, Samanta S, Ghosh P, Neogi S, Hajra A. Regioselective hydroarylation and arylation of maleimides with indazoles via a Rh(iii)-catalyzed C–H activation. Org Biomol Chem 2020; 18:3093-3097. [DOI: 10.1039/d0ob00353k] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Switchable Rh(iii)-catalyzed highly regioselective hydroarylation and oxidative arylation of maleimides with 2-arylindazoles via C–H activation have been demonstrated.
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Affiliation(s)
- Asim Kumar Ghosh
- Department of Chemistry
- Visva-Bharati (A Central University) Santiniketan
- India
| | - Sadhanendu Samanta
- Department of Chemistry
- Visva-Bharati (A Central University) Santiniketan
- India
| | - Payel Ghosh
- Department of Chemistry
- Visva-Bharati (A Central University) Santiniketan
- India
| | - Sukanya Neogi
- Department of Chemistry
- Visva-Bharati (A Central University) Santiniketan
- India
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University) Santiniketan
- India
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48
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Pan C, Huang G, Shan Y, Li Y, Yu JT. Rh(iii)-Catalyzed regioselective C4 alkylation of indoles with allylic alcohols: direct access to β-indolyl ketones. Org Biomol Chem 2020; 18:3038-3042. [DOI: 10.1039/d0ob00396d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A Rh(iii)-catalyzed direct C4 alkylation of indoles with allylic alcohols to access β-indolyl ketones was developed.
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Affiliation(s)
- Changduo Pan
- School of Chemical and Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Gao Huang
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Yujia Shan
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Yiting Li
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jin-Tao Yu
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
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