1
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Pavithra E, Kannadasan S, Shanmugam P. Synthesis of 5-aryl-3,3'-bis-indolyl and bis-7-aza-indolyl methanone derivatives from 5-bromo-7-azaindoles via sequential methylenation using microwave irradiation, CAN oxidation, and Suzuki coupling reactions. RSC Adv 2022; 12:30712-30721. [PMID: 36349162 PMCID: PMC9607884 DOI: 10.1039/d2ra05849a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 10/18/2022] [Indexed: 11/05/2022] Open
Abstract
A catalyst-free and green chemical method has been developed for the methylenation of indole and N-methyl-7-aza indoles with aqueous formaldehyde afforded respective N,N'-dimethyl-3,3'-bis-7-azaindolylmethanes under microwave irradiation in excellent yield. Subsequent oxidation of the products thus obtained, using one electron chemical oxidant CAN afforded N,N'-dimethyl-3,3'-bis-7-azaindolylmethanone derivatives in excellent yield. This resulted in methanone derivatives with halogen substitution at the aryl ring which when subjected to Suzuki coupling with aryl boronic acids furnished highly functionalized fluorescent biaryl derivatives. Plausible mechanisms, characterization including XRD, and evaluation of photophysical properties of the Suzuki coupled products are described.
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Affiliation(s)
- Elavarasan Pavithra
- Department of Chemistry, School of Advanced Sciences, VIT Vellore-632014 India
| | | | - Ponnusamy Shanmugam
- Organic and Bioorganic Chemistry Division, CSIR-Central Leather Research Institute (CLRI), Adyar Chennai-600020 India
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2
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Maji M, Borthakur I, Srivastava S, Kundu S. Regio-Selective C3- and N-Alkylation of Indolines in Water under Air Using Alcohols. J Org Chem 2022; 87:5603-5616. [PMID: 35416045 DOI: 10.1021/acs.joc.1c03040] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We disclosed a regio-selective C-H and N-H bond functionalization of indolines using alcohols in water via tandem dehydrogenation of N-heterocycles and alcohols. A diverse range of N- and C3-alkylated indolines/indoles were accessed utilizing a new cooperative iridium catalyst. The practical applicability of this methodology was demonstrated by the preparative-scale synthesis and synthesis of a psychoactive drug, N,N-dimethyltryptamine. A catalytic cycle is proposed based on several kinetic experiments, series of control experiments and density functional theory calculations.
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Affiliation(s)
- Milan Maji
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Ishani Borthakur
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Sameer Srivastava
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
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3
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Zhu L, Ye S, Wang J, Zhu J, He G, Liu X. Supported Iridium Catalyst for Clean Transfer Hydrogenation of Aldehydes and Ketones using Methanol as Hydrogen Source. ChemCatChem 2022. [DOI: 10.1002/cctc.202101794] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Longfei Zhu
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Sen Ye
- The University of Hong Kong Morningside Laboratory for Chemical Biology and Department of Chemistry CHINA
| | - Jing Wang
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Jiazheng Zhu
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Guangke He
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Xiang Liu
- Nanjing Tech University School of Chemistry and Molecular Engineering NO.30 Puzhu Road 211816 Nanjing CHINA
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4
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Li B, Qin H, Yan K, Ma J, Yang J, Wen J. NHPI-catalyzed electrochemical C–H alkylation of indoles with alcohols to access di(indolyl)methanes via radical coupling. Org Chem Front 2022. [DOI: 10.1039/d2qo01498j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The present indirect electrochemically mediated radical protocol outperforms the traditional Friedel–Crafts route with a broad substrate scope and functional group tolerance, as well as facile gram-scale synthesis without metal contamination.
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Affiliation(s)
- Bingwen Li
- Shandong Key Laboratory of Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China
| | - Hongyun Qin
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, China
| | - Kelu Yan
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, China
| | - Jing Ma
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, China
| | - Jianjing Yang
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, China
| | - Jiangwei Wen
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, China
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5
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Prasada Rao DE, Raju MD, Surendra J, Babu AV, Eswaraiah P, Reddy NRK, Rajendiran C, Rao MVB. A Facile and Efficient Synthesis of bis(Imidazo[1,2-a]pyridin-3-yl)methane
and Vinyl Derivatives. LETT ORG CHEM 2022. [DOI: 10.2174/1570178618666211022144225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An efficient synthetic route for the novel bis-imdizo[1,2-a]pyridine-3-yl)methane (2a-k)
derivatives have been developed using acetic acid and two drops of trifluoroacetic acid at 40-45oC,
resulting in 60-72% yields. An attempt to synthesize bis(Imidazo[1,2-a]pyridin-3-yl)methyl
chloride derivatives by the reaction between two moles of imidazo[1,2-a]pyridine, one mole of
chloroacetaldehyde in acetic acid, and two drops of trifluoroacetic acid was not successful, instead
underwent dehydrohalogenation to yield vinyl derivatives (4a-d).
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Affiliation(s)
| | - Medepalli David Raju
- Department of Chemistry,
P.B. Siddhartha college of Arts and Sciences, Vijayawada, Andhra Pradesh, 520010, India
| | - Jasti Surendra
- Department of Mechanical Engineering, Prasad
V. Potluri Siddhartha Institute of Technology, Vijayawada, Andhra Pradesh, 520007, India
| | - Ala Vasu Babu
- Department of Chemistry,
Krishna University, Machilipatnam, Andhra Pradesh, 521001, India
| | - Poguri Eswaraiah
- R&D Centre, Suven Pharmaceuticals Ltd, Jeedimetla, Hyderabad, Telangana, 500055, India
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6
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Zhou H, Huang Z, Huang H, Song C, Chang J. Synthesis of bisindolylmethane, bispyrrolylmethane, and indolylpyrrolylmethane derivatives via reductive heteroarylation. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Chen H, Zhou Z, Kong W. Allylic alcohol synthesis by Ni-catalyzed direct and selective coupling of alkynes and methanol. Chem Sci 2021; 12:9372-9378. [PMID: 34349909 PMCID: PMC8278963 DOI: 10.1039/d1sc02625a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/05/2021] [Indexed: 11/21/2022] Open
Abstract
Methanol is an abundant and renewable chemical raw material, but its use as a C1 source in C-C bond coupling reactions still constitutes a big challenge, and the known methods are limited to the use of expensive and noble metal catalysts such as Ru, Rh and Ir. We herein report nickel-catalyzed direct coupling of alkynes and methanol, providing direct access to valuable allylic alcohols in good yields and excellent chemo- and regioselectivity. The approach features a broad substrate scope and high atom-, step- and redox-economy. Moreover, this method was successfully extended to the synthesis of [5,6]-bicyclic hemiacetals through a cascade cyclization reaction of alkynones and methanol.
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Affiliation(s)
- Herong Chen
- The Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 P. R. China
| | - Zhijun Zhou
- The Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 P. R. China
| | - Wangqing Kong
- The Institute for Advanced Studies (IAS), Wuhan University Wuhan Hubei 430072 P. R. China
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8
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Jin J, Li Y, Xiang S, Fan W, Guo S, Huang D. Selectfluor facilitated bridging of indoles to bis(indolyl)methanes using methyl tert-butyl ether as a new methylene precursor. Org Biomol Chem 2021; 19:4076-4081. [PMID: 33978036 DOI: 10.1039/d1ob00120e] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, green and efficient method is developed for the synthesis of methylene bridged bis(indolyl)methanes in good to excellent yields. The reaction employs methyl tert-butyl ether (MTBE) as the methylene source and selectfluor as an oxidizing agent. The scope and versatility of the methods have been successfully demonstrated with 48 examples. The metal-free transformation process is suitable for scale-up production. A selectfluor-promoted oxidative reaction mechanism is proposed based on the results of the experimental studies.
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Affiliation(s)
- Jiang Jin
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China
| | - Yinghua Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Shiqun Xiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Weibin Fan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Shiwei Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
| | - Deguang Huang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
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9
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Hao S, Yang J, Liu P, Xu J, Yang C, Li F. Linear-Organic-Polymer-Supported Iridium Complex as a Recyclable Auto-Tandem Catalyst for the Synthesis of Quinazolinones via Selective Hydration/Acceptorless Dehydrogenative Coupling from o-Aminobenzonitriles. Org Lett 2021; 23:2553-2558. [PMID: 33729807 DOI: 10.1021/acs.orglett.1c00475] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A linear-organic-polymer-supported iridium complex Cp*Ir@P4VP, which is designed and synthesized by the coordinative immobilization of [Cp*IrCl2]2 on poly(4-vinylpyridine), was proven to be an efficient heterogeneous autotandem catalyst for synthesizing quinazolinones via selective hydration/acceptorless dehydrogenative coupling from o-aminobenzonitriles. Furthermore, the synthesized catalyst was recycled five times without an obvious decrease in the catalytic activity.
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Affiliation(s)
- Shushu Hao
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Jiazhi Yang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Peng Liu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Jing Xu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Chenchen Yang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Feng Li
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
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10
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Liu P, Yang J, Ai Y, Hao S, Chen X, Li F. Recyclable covalent triazine framework-supported iridium catalyst for the N-methylation of amines with methanol in the presence of carbonate. J Catal 2021. [DOI: 10.1016/j.jcat.2021.02.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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11
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Murugan K, Vijayapritha S, Kavitha V, Viswanathamurthi P. Versatile formation of Ru(II) hydrazone complexes: Structure, theoretical studies and catalytic activity in α-alkylation. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Lei L, Wang B, Jin D, Gao Z, Huan‐Liang, Wang S, Xu X, Zhang K, Zhang X. Al(OTf)
3
‐Catalyzed Tandem Coupling Reaction between
N,N
‐Disubstituted Aminomalonitriles and Substituted Arenes: a Synthesis of 1‐Cyano‐bisindolylmethane Analogues
≠. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000261] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lin‐Sheng Lei
- School of Pharmacy & State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
| | - Bo‐Wen Wang
- School of Pharmacy & State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
| | - Da‐Ping Jin
- School of Pharmacy & State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
| | - Zhu‐Peng Gao
- School of Pharmacy & State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
| | - Huan‐Liang
- School of Pharmacy & State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
| | - Shao‐Hua Wang
- School of Pharmacy & State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
- School of Biotechnology and Health ScienceWuyi University Jiangmen 529020 People's Republic of China
| | - Xue‐Tao Xu
- School of Biotechnology and Health ScienceWuyi University Jiangmen 529020 People's Republic of China
| | - Kun Zhang
- School of Biotechnology and Health ScienceWuyi University Jiangmen 529020 People's Republic of China
| | - Xiao‐Yun Zhang
- School of Pharmacy & State Key Laboratory of Applied Organic ChemistryLanzhou University Lanzhou 730000 People's Republic of China
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13
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Affiliation(s)
- Debasish Sarmah
- Department of Chemical SciencesTezpur University, Napaam Tezpur Assam India, Pin 784028
| | - Utpal Bora
- Department of Chemical SciencesTezpur University, Napaam Tezpur Assam India, Pin 784028
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14
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On the Stability and Degradation Pathways of Venetoclax under Stress Conditions. Pharmaceutics 2020; 12:pharmaceutics12070639. [PMID: 32645956 PMCID: PMC7407384 DOI: 10.3390/pharmaceutics12070639] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 12/18/2022] Open
Abstract
Venetoclax is an orally bioavailable, B-cell lymphoma-2 (BCL-2) selective inhibitor, used for the treatment of various types of blood cancers, such as chronic lymphocytic leukemia (CLL) and small lymphocytic lymphoma (SLL). In this study we investigated the degradation of venetoclax under various stress conditions including acidic, basic, oxidative, photolytic and thermolytic conditions. We isolated and identified six of its main degradation products produced in forced degradation studies. The structures of the isolated degradation products were determined by using nuclear magnetic resonance (NMR) spectroscopy, high resolution mass spectrometry (HRMS) and infrared (IR) spectroscopy. Additionally, one oxidation degradation product was identified with comparison to a commercially obtained venetoclax impurity. We proposed the key degradation pathways of venetoclax in solution. To the best of our knowledge, no structures of degradation products of venetoclax have been previously published. The study provides novel and primary knowledge of the stability characteristics of venetoclax under stress conditions. Venetoclax is currently the only BCL-2 protein inhibitor on the market. In addition to single agent treatment, it is effective in combinational therapy, so future drug development involving venetoclax can be expected. A better insight into the stability properties of the therapeutic can facilitate future studies involving venetoclax and aid in the search of new similar therapeutics.
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15
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Wübbolt S, Cheong CB, Frost JR, Christensen KE, Donohoe TJ. A Vinyl Cyclopropane Ring Expansion and Iridium-Catalyzed Hydrogen Borrowing Cascade. Angew Chem Int Ed Engl 2020; 59:11339-11344. [PMID: 32314851 PMCID: PMC7463175 DOI: 10.1002/anie.202003614] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/31/2020] [Indexed: 12/18/2022]
Abstract
A vinyl cyclopropane rearrangement embedded in an iridium-catalyzed hydrogen borrowing reaction enabled the formation of substituted stereo-defined cyclopentanes from Ph* methyl ketone and cyclopropyl alcohols. Mechanistic studies provide evidence for the ring-expansion reaction being the result of a cascade based on oxidation of the cyclopropyl alcohols, followed by aldol condensation with the pentamethyl phenyl-substituted ketone to form an enone containing the vinyl cyclopropane. Subsequent single electron transfer (SET) to this system initiates a rearrangement, and the catalytic cycle is completed by reduction of the new enone. This process allows for the efficient formation of diversely substituted cyclopentanes as well as the construction of complex bicyclic carbon skeletons containing up to four contiguous stereocentres, all with high diastereoselectivity.
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Affiliation(s)
- Simon Wübbolt
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
| | | | - James R. Frost
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
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16
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Biswas N, Sharma R, Srimani D. Ruthenium Pincer Complex Catalyzed Selective Synthesis of C‐3 Alkylated Indoles and Bisindolylmethanes Directly from Indoles and Alcohols. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000326] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nandita Biswas
- Department of ChemistryIndian Institute of Technology Guwahati Assam India 781039
| | - Rahul Sharma
- Department of ChemistryIndian Institute of Technology Guwahati Assam India 781039
| | - Dipankar Srimani
- Department of ChemistryIndian Institute of Technology Guwahati Assam India 781039
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17
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Wübbolt S, Cheong CB, Frost JR, Christensen KE, Donohoe TJ. A Vinyl Cyclopropane Ring Expansion and Iridium‐Catalyzed Hydrogen Borrowing Cascade. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003614] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Simon Wübbolt
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
| | - Choon Boon Cheong
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
| | - James R. Frost
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
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18
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Bartoccini F, Retini M, Piersanti G. C3-Alkylation of indoles and oxindoles by alcohols by means of borrowing hydrogen methodology. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151875] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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19
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Lafzi F, Kilic H, Saracoglu N. Protocols for the Syntheses of 2,2'-Bis(indolyl)arylmethanes, 2-Benzylated Indoles, and 5,7-Dihydroindolo[2,3- b]carbazoles. J Org Chem 2019; 84:12120-12130. [PMID: 31454241 DOI: 10.1021/acs.joc.9b02124] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electrophilic substitution reaction of 4,7-dihydroindole with aryl-aldehydes as an electrophilic partner followed by an oxidation step to deliver 2,2'-bis(indolyl)arylmethanes was studied for the first time. The reaction afforded regioselectivity at the 2,2'-positions of indole in an operationally simple and inexpensive procedure with a variety of substrates. To the best of our knowledge, this is the first set of examples of 2,2'-bis(indolyl)arylmethanes obtained in a substituent-free manner. A facile method from dipyrromethanes to the corresponding 2-benzylindoles was also reported. In addition, 2,2'-bis(indolyl)arylmethanes were converted to 5,7-dihydroindolo[2,3-b]carbazoles.
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Affiliation(s)
- Ferruh Lafzi
- Department of Chemistry, Faculty of Sciences , Atatürk University , Erzurum 25240 , Turkey
| | - Haydar Kilic
- Department of Chemistry, Faculty of Sciences , Atatürk University , Erzurum 25240 , Turkey.,Oltu Vocational Training School , Atatürk University , Erzurum 25400 , Turkey
| | - Nurullah Saracoglu
- Department of Chemistry, Faculty of Sciences , Atatürk University , Erzurum 25240 , Turkey
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20
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Lee SH, Kim K, Jeon YU, Kundu A, Dey P, Hwang JY, Mishra NK, Kim HS, Kim IS. Lewis acid-mediated cross-coupling reaction of 7-azaindoles and aldehydes: Cytotoxic evaluation of C3-linked bis-7-azaindoles. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.150974] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Kim Y, Lee J, Jung J, Kim SG. Chiral Brønsted acid-catalyzed Friedel–Crafts reaction of 3-indolylsulfamidates with indoles: Synthesis of enantioenriched bisindolylmethane sulfamates. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.05.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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22
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Gandhi S, Baire B. Unusual Formation of Cyclopenta[b]indoles from 3-Indolylmethanols and Alkynes. J Org Chem 2019; 84:3904-3918. [DOI: 10.1021/acs.joc.8b03027] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Soniya Gandhi
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamilnadu, India
| | - Beeraiah Baire
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamilnadu, India
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23
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Satish G, Polu A, Kota L, Ilangovan A. Copper-catalyzed oxidative amination of methanol to access quinazolines. Org Biomol Chem 2019; 17:4774-4782. [DOI: 10.1039/c9ob00392d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel method for the copper-catalyzed oxidative amination of 2′-aminoarylketones with methanol as a C1 carbon source and ammonium acetate as an amine source to construct quinazolines was established in a one-pot manner.
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Affiliation(s)
| | - Ashok Polu
- School of Chemistry
- Bharathidasan University
- Tiruchirappalli
- India
| | - Laxman Kota
- School of Chemistry
- Bharathidasan University
- Tiruchirappalli
- India
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24
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Meng C, Xu J, Tang Y, Ai Y, Li F. The α-alkylation of ketones with alcohols in pure water catalyzed by a water-soluble Cp*Ir complex bearing a functional ligand. NEW J CHEM 2019. [DOI: 10.1039/c9nj03345a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A water-soluble dinuclear Cp*Ir complex bearing 4,4′,6,6′-tetrahydroxy-2,2′-bipyrimidine as a bridging ligand was found to be a highly effective catalyst for the α-alkylation of ketones with alcohols in water.
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Affiliation(s)
- Chong Meng
- School of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - Jing Xu
- School of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - Yawen Tang
- School of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - Yao Ai
- School of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - Feng Li
- School of Chemical Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
- State Key Laboratory of Fine Chemicals
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25
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Nguyen TTH, Nguyen XTT, Nguyen CQ, Tran PH. Porous metal oxides derived from Cu-Al layered double hydroxide as an efficient heterogeneous catalyst for the Friedel-Crafts alkylation of indoles with benzaldehydes under microwave irradiation. Heliyon 2018; 4:e00966. [PMID: 30533545 PMCID: PMC6260462 DOI: 10.1016/j.heliyon.2018.e00966] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/07/2018] [Accepted: 11/20/2018] [Indexed: 11/07/2022] Open
Abstract
Four Cu-Mg-Al mixed metal oxides (MMO) were synthesized through the calcination of layered double hydroxides (LDHs). These catalysts were fully characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller surface area (BET), and inductively coupled plasma optical emission spectrometer (ICP-OES). The catalytic efficiency of porous metal oxides derived from LDHs has been tested successfully for the synthesis of bis(indolyl)methanes via the Friedel–Crafts alkylation of indoles with aromatic aldehydes under solvent-free microwave irradiation. The Cu-Al MMO showed the best catalytic activity to produce the expected products up to 98% yield and 100% selectivity for only 20 min under solvent-free microwave irradiation. Moreover, the catalyst can be recovered quickly from the reaction mixture by filtration and reused several times without significant loss of the reactivity.
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Affiliation(s)
- Thanh-Truc Hoang Nguyen
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Science, Viet Nam National University, Ho Chi Minh City, 721337, Viet Nam
| | - Xuan-Trang Thi Nguyen
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Viet Nam National University, Ho Chi Minh City, 721337, Viet Nam
| | - Chinh Quoc Nguyen
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Science, Viet Nam National University, Ho Chi Minh City, 721337, Viet Nam
| | - Phuong Hoang Tran
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Viet Nam National University, Ho Chi Minh City, 721337, Viet Nam
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26
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Zhang W, Meng C, Liu Y, Tang Y, Li F. Auto-Tandem Catalysis with Ruthenium: From o
-Aminobenzamides and Allylic Alcohols to Quinazolinones via
Redox Isomerization/Acceptorless Dehydrogenation. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800660] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Weikang Zhang
- School of Chemical Engineering; Nanjing University of Science & Technology; Nanjing 210094 People's Republic of China
| | - Chong Meng
- School of Chemical Engineering; Nanjing University of Science & Technology; Nanjing 210094 People's Republic of China
| | - Yan Liu
- School of Chemical Engineering; Nanjing University of Science & Technology; Nanjing 210094 People's Republic of China
| | - Yawen Tang
- School of Chemical Engineering; Nanjing University of Science & Technology; Nanjing 210094 People's Republic of China
| | - Feng Li
- School of Chemical Engineering; Nanjing University of Science & Technology; Nanjing 210094 People's Republic of China
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian 116024 People's Republic of China
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27
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Qiao C, Liu XF, Fu HC, Yang HP, Zhang ZB, He LN. Directly Bridging Indoles to 3,3′-Bisindolylmethanes by Using Carboxylic Acids and Hydrosilanes under Mild Conditions. Chem Asian J 2018; 13:2664-2670. [DOI: 10.1002/asia.201800766] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 06/11/2018] [Indexed: 01/14/2023]
Affiliation(s)
- Chang Qiao
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Xiao-Fang Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Hong-Chen Fu
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Hao-Peng Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Zhi-Bo Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Liang-Nian He
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
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28
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Cooper L, Alonso JM, Eagling L, Newson H, Herath S, Thomson C, Lister A, Howsham C, Cox B, Muñoz MP. Synthesis of a Novel Type of 2,3'-BIMs via Platinum-Catalysed Reaction of Indolylallenes with Indoles. Chemistry 2018; 24:6105-6114. [PMID: 29393548 PMCID: PMC5947743 DOI: 10.1002/chem.201705417] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Indexed: 12/17/2022]
Abstract
Optimisation, scope and mechanism of the platinum-catalysed addition of indoles to indolylallenes is reported here to give 2,3'-BIMs with a novel core structure very relevant for pharmaceutical industry. The reaction is modulated by the electronic properties of the substituents on both indoles, with the 2,3'-BIMs favoured when electron donating groups are present. Although simple at first, a complex mechanism has been uncovered that explains the different behaviour of these systems with platinum when compared with other metals (e.g. gold). Detailed labelling studies have shown Pt-catalysed 6-endo-trig cyclisation of the indollylallene as the first step of the reaction and the involvement of two cyclic vinyl-platinum intermediates in equilibrium through a platinum carbene, as the key intermediates of the catalytic cycle towards the second nucleophilic attack and formation of the BIMs.
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Affiliation(s)
- Lisa Cooper
- School of ChemistryUniversity of East AngliaEarlham RoadNorwichNR4 7TJUK
| | - José Miguel Alonso
- School of ChemistryUniversity of East AngliaEarlham RoadNorwichNR4 7TJUK
| | - Louise Eagling
- School of ChemistryUniversity of East AngliaEarlham RoadNorwichNR4 7TJUK
- Novartis Pharmaceuticals (UK) LimitedRH12 5AB, HorshamWest SussexUK
| | - Helen Newson
- School of ChemistryUniversity of East AngliaEarlham RoadNorwichNR4 7TJUK
- Novartis Pharmaceuticals (UK) LimitedRH12 5AB, HorshamWest SussexUK
| | - Sachini Herath
- School of ChemistryUniversity of East AngliaEarlham RoadNorwichNR4 7TJUK
| | | | - Andrew Lister
- Novartis Pharmaceuticals (UK) LimitedRH12 5AB, HorshamWest SussexUK
| | | | - Brian Cox
- Novartis Pharmaceuticals (UK) LimitedRH12 5AB, HorshamWest SussexUK
| | - María Paz Muñoz
- School of ChemistryUniversity of East AngliaEarlham RoadNorwichNR4 7TJUK
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29
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Oikawa K, Itoh S, Yano H, Kawasaki H, Obora Y. Preparation and use of DMF-stabilized iridium nanoclusters as methylation catalysts using methanol as the C1 source. Chem Commun (Camb) 2018; 53:1080-1083. [PMID: 28044173 DOI: 10.1039/c6cc09279a] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report methylations of alcohols and anilines catalyzed by DMF-stabilized Ir nanoclusters using methanol as the C1 source. The DMF-stabilized Ir nanoclusters were prepared in one step and have diameters of 1-1.5 nm. They react in a borrowing-hydrogen reaction and are efficient methylation catalysts (TON up to 310 000).
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Affiliation(s)
- Kei Oikawa
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka 564-8680, Japan.
| | - Satoshi Itoh
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka 564-8680, Japan.
| | - Hiroki Yano
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka 564-8680, Japan.
| | - Hideya Kawasaki
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka 564-8680, Japan.
| | - Yasushi Obora
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka 564-8680, Japan.
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30
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Siddiki SMAH, Touchy AS, Jamil MAR, Toyao T, Shimizu KI. C-Methylation of Alcohols, Ketones, and Indoles with Methanol Using Heterogeneous Platinum Catalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04442] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Abeda S. Touchy
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Md. A. R. Jamil
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Takashi Toyao
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Ken-ichi Shimizu
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
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31
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Tran PH, Nguyen XTT, Chau DKN. A Brønsted-Acidic Ionic Liquid Gel as an Efficient and Recyclable Heterogeneous Catalyst for the Synthesis of Bis(indolyl)methanes under Solvent-Free Sonication. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700596] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Phuong Hoang Tran
- Department of Organic Chemistry; Faculty of Chemistry; University of Science, Vietnam National University; Ho Chi Minh City 721337 Vietnam
| | - Xuan-Trang Thi Nguyen
- Department of Organic Chemistry; Faculty of Chemistry; University of Science, Vietnam National University; Ho Chi Minh City 721337 Vietnam
| | - Duy-Khiem Nguyen Chau
- Department of Organic Chemistry; Faculty of Chemistry; University of Science, Vietnam National University; Ho Chi Minh City 721337 Vietnam
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32
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Fan H, Zhang W, Zhao W, Li F. Acceptorless Dehydrogenative Cyclization ofo-Aminobenzylamines and Aldehydes to Quinazolines in Water Catalyzed by a Water-Soluble Metal-Ligand Bifunctional Catalyst. ChemistrySelect 2017. [DOI: 10.1002/slct.201700871] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hongjun Fan
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P. R. China
| | - Weikang Zhang
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P. R. China
| | - Wei Zhao
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P. R. China
| | - Feng Li
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P. R. China
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33
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Zhang Y, Zhang SX, Fu LN, Guo QX. Highly Efficient Atom-Economic Synthesis of Chiral Bis(indolyl)methanes Bearing Quaternary Stereogenic Carbon Centers. ChemCatChem 2017. [DOI: 10.1002/cctc.201700368] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yan Zhang
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University Institution; Chongqing 400715 China
| | - Si-Xiang Zhang
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University Institution; Chongqing 400715 China
| | - Li-Na Fu
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University Institution; Chongqing 400715 China
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality; School of Chemistry and Chemical Engineering; Southwest University Institution; Chongqing 400715 China
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34
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Adolph CM, Werth J, Selvaraj R, Wegener EC, Uyeda C. Dehydrogenative Transformations of Imines Using a Heterogeneous Photocatalyst. J Org Chem 2017; 82:5959-5965. [PMID: 28485932 DOI: 10.1021/acs.joc.7b00617] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Colby M. Adolph
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jacob Werth
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Ramajeyam Selvaraj
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Evan C. Wegener
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Christopher Uyeda
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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35
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Zhao W, Ma W, Xiao T, Li F. Iridium-Catalyzed Cyclization of o
-Aminobenzamides with Unsaturated Aldehydes to Give 2-Alkylquinazolinones through a Hydrogen Autotransfer Process. ChemistrySelect 2017. [DOI: 10.1002/slct.201700780] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wei Zhao
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P. R. China
| | - Wangjing Ma
- Department of Chemistry; University of Oxford; Oxford OX1 3QR United Kingdom
| | - Tiancun Xiao
- Department of Chemistry; University of Oxford; Oxford OX1 3QR United Kingdom
| | - Feng Li
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P. R. China
- Department of Chemistry; University of Oxford; Oxford OX1 3QR United Kingdom
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36
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Pillaiyar T, Köse M, Sylvester K, Weighardt H, Thimm D, Borges G, Förster I, von Kügelgen I, Müller CE. Diindolylmethane Derivatives: Potent Agonists of the Immunostimulatory Orphan G Protein-Coupled Receptor GPR84. J Med Chem 2017; 60:3636-3655. [PMID: 28406627 DOI: 10.1021/acs.jmedchem.6b01593] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The Gi protein-coupled receptor GPR84, which is activated by (hydroxy)fatty acids, is highly expressed on immune cells. Recently, 3,3'-diindolylmethane was identified as a heterocyclic, nonlipid-like GPR84 agonist. We synthesized a broad range of diindolylmethane derivatives by condensation of indoles with formaldehyde in water under microwave irradiation. The products were evaluated at the human GPR84 in cAMP and β-arrestin assays. Structure-activity relationships (SARs) were steep. 3,3'-Diindolylmethanes bearing small lipophilic residues at the 5- and/or 7-position of the indole rings displayed the highest activity in cAMP assays, the most potent agonists being di(5-fluoro-1H-indole-3-yl)methane (38, PSB-15160, EC50 80.0 nM) and di(5,7-difluoro-1H-indole-3-yl)methane (57, PSB-16671, EC50 41.3 nM). In β-arrestin assays, SARs were different, indicating biased agonism. The new compounds were selective versus related fatty acid receptors and the arylhydrocarbon receptor. Selected compounds were further investigated and found to display an ago-allosteric mechanism of action and increased stability in comparison to the lead structure.
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Affiliation(s)
- Thanigaimalai Pillaiyar
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn , An der Immenburg 4, D-53121 Bonn, Germany
| | - Meryem Köse
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn , An der Immenburg 4, D-53121 Bonn, Germany
| | - Katharina Sylvester
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn , An der Immenburg 4, D-53121 Bonn, Germany
| | - Heike Weighardt
- Life and Medical Sciences (LIMES) Institute, Immunology and Environment, University of Bonn , Carl-Troll-Straße 31, 53115 Bonn, Germany
| | - Dominik Thimm
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn , An der Immenburg 4, D-53121 Bonn, Germany
| | - Gleice Borges
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn , An der Immenburg 4, D-53121 Bonn, Germany
| | - Irmgard Förster
- Life and Medical Sciences (LIMES) Institute, Immunology and Environment, University of Bonn , Carl-Troll-Straße 31, 53115 Bonn, Germany
| | - Ivar von Kügelgen
- Department of Pharmacology and Toxicology, University of Bonn , 53105 Bonn, Germany
| | - Christa E Müller
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn , An der Immenburg 4, D-53121 Bonn, Germany
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37
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Kim S, Hong SH. Ruthenium-Catalyzed Aminomethylation and Methylation of Phenol Derivatives Utilizing Methanol as the C1Source. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601117] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Seoksun Kim
- Department of Chemistry; College of Natural Sciences; Seoul National University; Seoul 08826 Republic of Korea
| | - Soon Hyeok Hong
- Department of Chemistry; College of Natural Sciences; Seoul National University; Seoul 08826 Republic of Korea
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38
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Karmakar S, Das P, Ray D, Ghosh S, Chattopadhyay SK. Ag(I)-Catalyzed Domino Cyclization–Addition Sequence with Simultaneous Carbonyl and Alkyne Activation as a Route to 2,2′-Disubstituted Bisindolylarylmethanes. Org Lett 2016; 18:5200-5203. [PMID: 27709960 DOI: 10.1021/acs.orglett.6b02321] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Swastik Karmakar
- Department
of Chemistry, Basirhat College, Basirhat 743412, West Bengal India
| | - Prasanta Das
- Department
of Chemistry, Basirhat College, Basirhat 743412, West Bengal India
| | - Debjyoti Ray
- Department
of Chemistry, Basirhat College, Basirhat 743412, West Bengal India
| | - Subhankar Ghosh
- Department
of Chemistry, University of Kalyani, Kalyani 741235, West Bengal India
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39
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40
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Wang R, Fan H, Zhao W, Li F. Acceptorless Dehydrogenative Cyclization of o-Aminobenzyl Alcohols with Ketones to Quinolines in Water Catalyzed by Water-Soluble Metal–Ligand Bifunctional Catalyst [Cp*(6,6′-(OH)2bpy)(H2O)][OTf]2. Org Lett 2016; 18:3558-61. [DOI: 10.1021/acs.orglett.6b01518] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rongzhou Wang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Hongjun Fan
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Wei Zhao
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Feng Li
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
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41
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Li F, Lu L, Liu P. Acceptorless Dehydrogenative Coupling of o-Aminobenzamides with the Activation of Methanol as a C1 Source for the Construction of Quinazolinones. Org Lett 2016; 18:2580-3. [DOI: 10.1021/acs.orglett.6b00925] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Feng Li
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Lei Lu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Pengcheng Liu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China
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42
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Zhao W, Liu P, Li F. Quinazolinones from o
-Aminobenzonitriles by One-Pot Sequential Selective Hydration/Condensation/Acceptorless Dehydrogenation Catalyzed by an Iridium Complex. ChemCatChem 2016. [DOI: 10.1002/cctc.201501385] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wei Zhao
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P.R. China
| | - Pengcheng Liu
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P.R. China
| | - Feng Li
- School of Chemical Engineering; Nanjing University of Science & Technology; 200 Xiaolingwei Street Nanjing 210094 P.R. China
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Lingong Road Dalian 116024 P.R. China
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43
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Obora Y. C-Alkylation by Hydrogen Autotransfer Reactions. Top Curr Chem (Cham) 2016; 374:11. [PMID: 27573136 DOI: 10.1007/s41061-016-0012-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/11/2016] [Indexed: 01/04/2023]
Abstract
The development of practical, efficient, and atom-economical methods for the formation of carbon-carbon bonds remains a topic of considerable interest in current synthetic organic chemistry. In this review, we have summarized selected topics from the recent literature with particular emphasis on C-alkylation processes involving hydrogen transfer using alcohols as alkylation reagents. This review includes selected highlights concerning recent progress towards the modification of catalytic systems for the α-alkylation of ketones, nitriles, and esters. Furthermore, we have devoted a significant portion of this review to the methylation of ketones, alcohols, and indoles using methanol. Lastly, we have also documented recent advances in β-alkylation methods involving the dimerization of alcohols (Guerbet reaction), as well as new developments in C-alkylation methods based on sp (3) C-H activation.
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Affiliation(s)
- Yasushi Obora
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, Suita, Osaka, 564-8680, Japan.
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44
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Pu F, Li Y, Song YH, Xiao J, Liu ZW, Wang C, Liu ZT, Chen JG, Lu J. Copper-Catalyzed Coupling of Indoles with Dimethylformamide as a Methylenating Reagent. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500874] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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45
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Neshat A. Synthesis, characterization and photophysical properties of some 3,3′-bisindolyl(aryl)methanes. RSC Adv 2016. [DOI: 10.1039/c6ra01391k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of 3,3′-bisindolyl(aryl)methanes were synthesized and fully characterized by a combination of1H and13C NMR spectroscopy and in one case using X-ray crystallography.
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Affiliation(s)
- Abdollah Neshat
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-6731
- Iran
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46
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Affiliation(s)
- Seung Hyo Kim
- Center
for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Chemistry,
College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea
- Korea Carbon Capture Sequestration R&D Center (KCRC), Daejeon 305-303, Republic of Korea
| | - Soon Hyeok Hong
- Center
for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea
- Department of Chemistry,
College of Natural Sciences, Seoul National University, Seoul 151-747, Republic of Korea
- Korea Carbon Capture Sequestration R&D Center (KCRC), Daejeon 305-303, Republic of Korea
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47
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Li Y, Li H, Junge H, Beller M. Selective ruthenium-catalyzed methylation of 2-arylethanols using methanol as C1 feedstock. Chem Commun (Camb) 2015; 50:14991-4. [PMID: 25327955 DOI: 10.1039/c4cc06933a] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the selective cross coupling of methanol and 2-arylethanols using a combination of Ru-MACHO (RuHCl(PNP(Ph))CO) and Shvo's diruthenium complex as catalysts. The desired domino transformation takes place via so-called borrowing hydrogen methodology, which constitutes an ideal example of green chemistry.
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Affiliation(s)
- Yang Li
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert Einstein Str. 29a, 18059 Rostock, Germany.
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48
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Wang N, Zou X, Ma J, Li F. The direct synthesis of N-alkylated amides via a tandem hydration/N-alkylation reaction from nitriles, aldoximes and alcohols. Chem Commun (Camb) 2015; 50:8303-5. [PMID: 24935726 DOI: 10.1039/c4cc02742f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel strategy for the direct synthesis of N-alkylated amides from nitriles, aldoximes and alcohols was proposed and accomplished in the presence of a Cp*Ir complex.
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Affiliation(s)
- Nana Wang
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
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49
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Lu L, Ma J, Qu P, Li F. Effective Recognition of Different Types of Amino Groups: From Aminobenzenesulfonamides to Amino-(N-alkyl)benzenesulfonamides via Iridium-Catalyzed N-Alkylation with Alcohols. Org Lett 2015; 17:2350-3. [DOI: 10.1021/acs.orglett.5b00824] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Lei Lu
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Juan Ma
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Panpan Qu
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Feng Li
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
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50
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Li F, Zou X, Wang N. Direct Coupling of Arylacetonitriles and Primary Alcohols to α-Alkylated Arylacetamides with Complete Atom Economy Catalyzed by a Rhodium Complex-Triphenylphosphine- Potassium Hydroxide System. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401013] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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