1
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Fang C, Li L, Yang H, Kong C, Zhang J, Xie M, Wu J. Rh(III)-catalyzed selective C2 C-H acyloxylation of indoles. Chem Commun (Camb) 2023; 60:216-219. [PMID: 38050725 DOI: 10.1039/d3cc05799b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Herein, we present the first highly regio- and chemoselective C2 C-H acyloxylation of indole under rhodium catalysis and an N-quinolinyl auxiliary. This strategy accommodates a wide range of indoles and structurally diverse carboxylic acids with good reaction efficiencies to yield functionalized indoles. The utility of this logic was demonstrated by the concise synthesis of the functionalized 2-oxindole derivatives. Preliminary mechanistic studies indicate that catalyst turnover of RhIII-RhIV/V-RhII/III-RhIII might be involved in this catalytic C-H transformation.
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Affiliation(s)
- Chaoying Fang
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Li Li
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Haitao Yang
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Caiyang Kong
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Jitan Zhang
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Meihua Xie
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
| | - Jiaping Wu
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China.
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2
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Rinehart NI, Saunthwal RK, Wellauer J, Zahrt AF, Schlemper L, Shved AS, Bigler R, Fantasia S, Denmark SE. A machine-learning tool to predict substrate-adaptive conditions for Pd-catalyzed C-N couplings. Science 2023; 381:965-972. [PMID: 37651532 DOI: 10.1126/science.adg2114] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 08/01/2023] [Indexed: 09/02/2023]
Abstract
Machine-learning methods have great potential to accelerate the identification of reaction conditions for chemical transformations. A tool that gives substrate-adaptive conditions for palladium (Pd)-catalyzed carbon-nitrogen (C-N) couplings is presented. The design and construction of this tool required the generation of an experimental dataset that explores a diverse network of reactant pairings across a set of reaction conditions. A large scope of C-N couplings was actively learned by neural network models by using a systematic process to design experiments. The models showed good performance in experimental validation: Ten products were isolated in more than 85% yield from a range of couplings with out-of-sample reactants designed to challenge the models. Importantly, the developed workflow continually improves the prediction capability of the tool as the corpus of data grows.
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Affiliation(s)
- N Ian Rinehart
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Rakesh K Saunthwal
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Joël Wellauer
- Pharmaceutical Division, Synthetic Molecules Technical Development, Process Chemistry and Catalysis, F. Hoffmann-La Roche, Ltd., Basel, Switzerland
| | - Andrew F Zahrt
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Lukas Schlemper
- Pharmaceutical Division, Synthetic Molecules Technical Development, Process Chemistry and Catalysis, F. Hoffmann-La Roche, Ltd., Basel, Switzerland
| | - Alexander S Shved
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Raphael Bigler
- Pharmaceutical Division, Synthetic Molecules Technical Development, Process Chemistry and Catalysis, F. Hoffmann-La Roche, Ltd., Basel, Switzerland
| | - Serena Fantasia
- Pharmaceutical Division, Synthetic Molecules Technical Development, Process Chemistry and Catalysis, F. Hoffmann-La Roche, Ltd., Basel, Switzerland
| | - Scott E Denmark
- Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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3
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Roy S, Panja S, Sahoo SR, Chatterjee S, Maiti D. Enroute sustainability: metal free C-H bond functionalisation. Chem Soc Rev 2023; 52:2391-2479. [PMID: 36924227 DOI: 10.1039/d0cs01466d] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
The term "C-H functionalisation" incorporates C-H activation followed by its transformation. In a single line, this can be defined as the conversion of carbon-hydrogen bonds into carbon-carbon or carbon-heteroatom bonds. The catalytic functionalisation of C-H bonds using transition metals has emerged as an atom-economical technique to engender new bonds without activated precursors which can be considered as a major drawback while attempting large-scale synthesis. Replacing the transition-metal-catalysed approach with a metal-free strategy significantly offers an alternative route that is not only inexpensive but also environmentally benign to functionalize C-H bonds. Recently metal free synthetic approaches have been flourishing to functionalize C-H bonds, motivated by the search for greener, cost-effective, and non-toxic catalysts. In this review, we will highlight the comprehensive and up-to-date discussion on recent examples of ground-breaking research on green and sustainable metal-free C-H bond functionalisation.
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Affiliation(s)
- Sayan Roy
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Subir Panja
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Sumeet Ranjan Sahoo
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Sagnik Chatterjee
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India. .,Department of Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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4
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Bera M, Hwang HS, Um TW, Oh SM, Shin S, Cho EJ. Energy Transfer Photocatalytic Radical Rearrangement in N-Indolyl Carbonates. Org Lett 2022; 24:1774-1779. [PMID: 35230112 DOI: 10.1021/acs.orglett.2c00085] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A new type of sp3-like N-centered radical has been generated by selective energy transfer catalysis. Upon photoexcitation, homolytic N-O bond cleavage of N-indolyl carbonate in the presence of an Ir complex produced N- and O-centered radicals. The high spin density at the C3 position of indole led to radical recombination with the O-centered radical, affording valuable 3-oxyindole derivatives without decarboxylation. Transformations of the desired products into various molecules were also demonstrated.
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Affiliation(s)
- Milan Bera
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Ho Seong Hwang
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Tae-Woong Um
- Department of Chemistry, Center for New Directions in Organic Synthesis (CNOS), Institute for Natural Sciences, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Soo Min Oh
- Department of Chemistry, Center for New Directions in Organic Synthesis (CNOS), Institute for Natural Sciences, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Seunghoon Shin
- Department of Chemistry, Center for New Directions in Organic Synthesis (CNOS), Institute for Natural Sciences, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
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5
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Jeyakannu P, Chandru Senadi G, Chiang C, Kumar Dhandabani G, Chang Y, Wang J. An Efficient Approach to Functionalized Indoles from λ
3
‐Iodanes via Acyloxylation and Acyl Transfer. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Palaniraja Jeyakannu
- Department of Medicinal and Applied ChemistryKaohsiung Medical University No. 100, Shih-Chuan 1st Road, Sanmin District Kaohsiung City 807 Taiwan
| | - Gopal Chandru Senadi
- Department of Chemistry, Faculty of Engineering and TechnologySRM Institute of Science and Technology, Kattankulathur Chennai 603203 India
| | - Chun‐Hsien Chiang
- Department of Medicinal and Applied ChemistryKaohsiung Medical University No. 100, Shih-Chuan 1st Road, Sanmin District Kaohsiung City 807 Taiwan
| | - Ganesh Kumar Dhandabani
- Department of Medicinal and Applied ChemistryKaohsiung Medical University No. 100, Shih-Chuan 1st Road, Sanmin District Kaohsiung City 807 Taiwan
| | - Yu‐Ching Chang
- Department of Medicinal and Applied ChemistryKaohsiung Medical University No. 100, Shih-Chuan 1st Road, Sanmin District Kaohsiung City 807 Taiwan
| | - Jeh‐Jeng Wang
- Department of Medicinal and Applied ChemistryKaohsiung Medical University No. 100, Shih-Chuan 1st Road, Sanmin District Kaohsiung City 807 Taiwan
- Department of Medical ResearchKaohsiung Medical University Hospital No. 100, Tzyou 1st Road, Sanmin District Kaohsiung City 807 Taiwan
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6
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Mao Z, Liu M, Zhu G, Zhou J, Zhang X. Transition-metal-free highly regioselective C–H acetoxylation of pyrrolo[2,3-d]pyrimidine derivatives. Org Chem Front 2020. [DOI: 10.1039/d0qo00702a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Transition-metal-free catalyzed direct C(sp2)–H acetoxylation of pyrrolo[2,3-d]pyrimidine derivatives is reported. This protocol provides a variety of acetoxylated pyrrolo[2,3-d]pyrimidines in good to excellent yields.
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Affiliation(s)
- Zhengtong Mao
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Min Liu
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Gaoyang Zhu
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Jing Zhou
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Xingxian Zhang
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
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7
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Brahmachari G, Karmakar I. sp
2-C-H Acetoxylation of Diversely Substituted (E
)-1-(Arylmethylene)-2-phenylhydrazines Using PhI(OAc)2
as Acetoxy Source at Ambient Conditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900994] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Goutam Brahmachari
- Laboratory of Natural Products & Organic Synthesis; Department of Chemistry; Visva-Bharati(a Central University); 731 235 Santiniketan- West Bengal India
| | - Indrajit Karmakar
- Laboratory of Natural Products & Organic Synthesis; Department of Chemistry; Visva-Bharati(a Central University); 731 235 Santiniketan- West Bengal India
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8
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Garia A, Jain N. Transition-Metal-Free Synthesis of Fused Quinazolinones by Oxidative Cyclization of N-Pyridylindoles. J Org Chem 2019; 84:9661-9670. [DOI: 10.1021/acs.joc.9b01170] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Alankrita Garia
- Department of Chemistry, Indian Institute of Technology, New Delhi 110016, India
| | - Nidhi Jain
- Department of Chemistry, Indian Institute of Technology, New Delhi 110016, India
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9
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Liang RX, Wang K, Song LJ, Sheng WJ, Jia YX. Synthesis of tetracyclic indolin-3-ones through Pd-catalyzed intramolecular deacetylative dearomatization of 3-acetoxy-indoles. RSC Adv 2019; 9:13959-13967. [PMID: 35519305 PMCID: PMC9064017 DOI: 10.1039/c9ra02569c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 04/29/2019] [Indexed: 12/18/2022] Open
Abstract
An efficient palladium-catalyzed intramolecular deacetylative dearomatization reaction of 3-acetoxyindoles has been developed. A range of tetracyclic indolin-3-ones bearing C2-quaternary stereocenters are achieved in good yields, showing a wide substrate scope for this reaction. A preliminary enantioselective reaction is established to furnish the product in 63% ee by using (R,R,R)-phosphoramide-PE as a chiral ligand. An efficient palladium-catalyzed intramolecular deacetylative dearomatization reaction of 3-acetoxyindoles is disclosed, affording tetracyclic indolin-3-ones bearing C2-quaternary stereocenters in good yields.![]()
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Affiliation(s)
- Ren-Xiao Liang
- College of Chemical Engineering
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Ke Wang
- College of Chemical Engineering
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Ling-Jie Song
- College of Chemical Engineering
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Wei-Jian Sheng
- College of Chemical Engineering
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Yi-Xia Jia
- College of Chemical Engineering
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
- China
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10
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Song J, Cui J, Liang H, Liu Q, Dong Y, Liu H. Palladium-Catalyzed Direct Oxidative Esterification of Indoles at the C3 Position: A Novel Prospect for C(sp2
)−H Acyloxylation. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700663] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jian Song
- School of Chemistry and Chemical Engineering; Shandong University of Technology; 266 West Xincun Road Zibo 255049 P. R. China
| | - Jie Cui
- School of Chemistry and Chemical Engineering; Shandong University of Technology; 266 West Xincun Road Zibo 255049 P. R. China
| | - Hanbing Liang
- School of Chemistry and Chemical Engineering; Shandong University of Technology; 266 West Xincun Road Zibo 255049 P. R. China
| | - Qing Liu
- School of Chemistry and Chemical Engineering; Shandong University of Technology; 266 West Xincun Road Zibo 255049 P. R. China
| | - Yunhui Dong
- School of Chemistry and Chemical Engineering; Shandong University of Technology; 266 West Xincun Road Zibo 255049 P. R. China
| | - Hui Liu
- School of Chemistry and Chemical Engineering; Shandong University of Technology; 266 West Xincun Road Zibo 255049 P. R. China
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11
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Khake SM, Soni V, Gonnade RG, Punji B. A General Nickel-Catalyzed Method for C−H Bond Alkynylation of Heteroarenes Through Chelation Assistance. Chemistry 2017; 23:2907-2914. [DOI: 10.1002/chem.201605306] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Indexed: 01/12/2023]
Affiliation(s)
- Shrikant M. Khake
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
| | - Vineeta Soni
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
| | - Rajesh G. Gonnade
- Centre for Material Characterization; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Group; Chemical Engineering Division; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune 411 008 Maharastra India
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12
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Xu D, Sun WW, Xie Y, Liu JK, Liu B, Zhou Y, Wu B. Metal-Free Regioselective Hypervalent Iodine-Mediated C-2 and C-3 Difunctionalization of N-Substituted Indoles. J Org Chem 2016; 81:11081-11094. [PMID: 27792348 DOI: 10.1021/acs.joc.6b02078] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Mild, metal-free, highly regioselective hypervalent-iodine mediated C-2 acetoxylation and C-3 oxidations of N-substituted indoles with (diacetoxyiodo)benzene [PhI(OAc)2] have been reported. The reaction involves three cascade steps. The quantity of PhI(OAc)2 employed in this reaction plays a key role in the outcome of three types of products (2a-4a). Furthermore, the mild and highly regioselective C-2 oxidation and C-3 dichlorination of N-substituted indoles with PhICl2 have been developed. Extensive studies including in situ IR techniques and H2O18-labeling experiment were performed to gain insight into the possible reaction mechanism.
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Affiliation(s)
- Dongdong Xu
- Cardiovascular Research Center, Shantou University Medical College , 22 Xin-Ling Rd, Shantou, 515041, China
- PET/CT Center, The First People's Hospital of Yunnan Province , 157 Jinbi Road, Kunming, 650032, China
| | - Wen-Wu Sun
- School of Pharmaceutical Sciences, South-Central University for Nationalities , Wuhan 430074, China
| | - Yanli Xie
- Cardiovascular Research Center, Shantou University Medical College , 22 Xin-Ling Rd, Shantou, 515041, China
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central University for Nationalities , Wuhan 430074, China
| | - Bin Liu
- Cardiovascular Research Center, Shantou University Medical College , 22 Xin-Ling Rd, Shantou, 515041, China
| | - Yingbi Zhou
- Cardiovascular Research Center, Shantou University Medical College , 22 Xin-Ling Rd, Shantou, 515041, China
| | - Bin Wu
- School of Pharmaceutical Sciences, South-Central University for Nationalities , Wuhan 430074, China
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201, China
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13
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Wang L, Qu X, Fang L, Li Z, Hu S, Wang F. Synthesis of 3-Acetoxyoxindole Derivatives by Metal-Free PhI(OAc)2-Mediated Oxidation of 3-Substituted Indoles. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600706] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Liang Wang
- Key Laboratory of Optoelectronic Chemical Materials and Devices; Ministry of Education; School of Chemical and Enviromental Engineering; Jianghan University; 430056 Wuhan P. R. China
| | - Xing Qu
- Key Laboratory of Optoelectronic Chemical Materials and Devices; Ministry of Education; School of Chemical and Enviromental Engineering; Jianghan University; 430056 Wuhan P. R. China
| | - Lizhu Fang
- Key Laboratory of Optoelectronic Chemical Materials and Devices; Ministry of Education; School of Chemical and Enviromental Engineering; Jianghan University; 430056 Wuhan P. R. China
| | - Zhan Li
- Key Laboratory of Optoelectronic Chemical Materials and Devices; Ministry of Education; School of Chemical and Enviromental Engineering; Jianghan University; 430056 Wuhan P. R. China
| | - Siqian Hu
- Key Laboratory of Optoelectronic Chemical Materials and Devices; Ministry of Education; School of Chemical and Enviromental Engineering; Jianghan University; 430056 Wuhan P. R. China
| | - Feng Wang
- College of Chemistry and Materials Science; Hubei Engineering University; 432000 Xiaogan P. R. China
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14
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Bosnidou AE, Millán A, Ceballos J, Martínez C, Muñiz K. Iodine(III)-Mediated Selective Intermolecular C–H Amination for the Chemical Diversification of Tryptamines. J Org Chem 2016; 81:6496-504. [DOI: 10.1021/acs.joc.6b01118] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Alexandra E. Bosnidou
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avenida Països Catalans 16, E-43007 Tarragona, Spain
| | - Alba Millán
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avenida Països Catalans 16, E-43007 Tarragona, Spain
| | - Javier Ceballos
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avenida Països Catalans 16, E-43007 Tarragona, Spain
| | - Claudio Martínez
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avenida Països Catalans 16, E-43007 Tarragona, Spain
| | - Kilian Muñiz
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avenida Països Catalans 16, E-43007 Tarragona, Spain
- ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
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15
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Anumandla D, Acharya A, Jeffrey CS. Oxidative (3 + 2) Cycloaddition Reactions of Diaza-Oxyallyl Cationic Intermediates and Indoles for the Synthesis of Imidazoloindolines. Org Lett 2016; 18:476-9. [DOI: 10.1021/acs.orglett.5b03527] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Devendar Anumandla
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
| | - Arjun Acharya
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
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16
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Yang C, Cheng G, Huang B, Xue F, Jiang C. Metal-free regioselective construction of indolin-3-ones via hypervalent iodine oxidation of N-substituted indoles. RSC Adv 2016. [DOI: 10.1039/c6ra19741h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A metal-free method for regioselective construction of 2-acetoxy indolin-3-ones from N-substituted indoles using PhI(OAc)2 was developed under mild reaction conditions.
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Affiliation(s)
- Chao Yang
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Guanyun Cheng
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Baofu Huang
- Nanjing Perlong Medical Equipment Co., Ltd
- Nanjing
- China
| | - Fengtian Xue
- Department of Pharmaceutical Sciences
- University of Maryland School of Pharmacy
- Baltimore
- United States
| | - Chao Jiang
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
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17
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Prasad PK, Kalshetti RG, Reddi RN, Kamble SP, Sudalai A. I2-mediated regioselective C-3 azidation of indoles. Org Biomol Chem 2016; 14:3027-30. [DOI: 10.1039/c6ob00295a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
An unprecedented synthesis of novel 3-azido indoles has been developed using I2 and NaN3 in high yields and excellent regioselectivity.
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Affiliation(s)
- Pragati K. Prasad
- Chemical Engineering and Process Development Division
- National Chemical Laboratory
- Pune
- India
| | - Rupali G. Kalshetti
- Chemical Engineering and Process Development Division
- National Chemical Laboratory
- Pune
- India
| | - Rambabu N. Reddi
- Chemical Engineering and Process Development Division
- National Chemical Laboratory
- Pune
- India
| | - Sanjay P. Kamble
- Chemical Engineering and Process Development Division
- National Chemical Laboratory
- Pune
- India
| | - Arumugam Sudalai
- Chemical Engineering and Process Development Division
- National Chemical Laboratory
- Pune
- India
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