1
|
Zhao Y, Zhang J, Zhang J, Zhang Z, Liu R. Iodine-Catalyzed Cyclization of o-Nitrothiophenols with Cyclohexanones to Phenothiazines. J Org Chem 2024. [PMID: 38773694 DOI: 10.1021/acs.joc.4c00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
Here, a novel iodine-catalyzed direct cyclization of o-nitrothiophenols with cyclohexanones to phenothiazines has been described without external oxidants and hydrogen acceptors. The nitro of o-nitrothiophenol works as both a hydrogen acceptor and a coupling group, and water is the only byproduct. The reaction involves the reduction of nitro groups, C-H bond thioetherification, and C-H bond dehydroaromatization. This scheme offers broad synthetic value for further elaborations, as exemplified by a 3-step total synthesis of antipsychotic chlorpromazine.
Collapse
Affiliation(s)
- Yinglin Zhao
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Jin Zhang
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Jingwu Zhang
- Shandong Medicine Technician College, Fengtian Road 999, Tai'an 271000, Shandong, P. R. China
| | - Zhida Zhang
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Renhua Liu
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| |
Collapse
|
2
|
Fnaiche A, Bueno B, McMullin CL, Gagnon A. On the Barton Copper-Catalyzed C3-Arylation of Indoles using Triarylbismuth bis(trifluoroacetate) Reagents. Chempluschem 2023; 88:e202200465. [PMID: 36843381 DOI: 10.1002/cplu.202200465] [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: 12/31/2022] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 02/28/2023]
Abstract
We disclose herein our detailed investigation into the Barton copper-promoted C3-arylation of indoles using triarylbismuth bis(trifluoroacetates). The arylation of unsubstituted 1H-indole using Barton's conditions gave a low yield of the C3-arylated indole, along with small amounts of the product of double C2/C3-arylation and traces of the product of C2 arylation. On the contrary, the arylation of indoles blocked at the C2 position is highly efficient, affording the desired products of C3-arylation in good to excellent yields. The reaction operates under simple conditions, shows good substrate scope, excellent functional group compatibility, and allows the transfer of electron-neutral or deficient aryl groups. Computational studies propose a mechanism involving a trifluoroacetate-assisted C-H activation step.
Collapse
Affiliation(s)
- Ahmed Fnaiche
- Département de chimie, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, H3C 3P8, Montréal, Québec, Canada
| | - Bianca Bueno
- Département de chimie, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, H3C 3P8, Montréal, Québec, Canada
| | - Claire L McMullin
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Alexandre Gagnon
- Département de chimie, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, H3C 3P8, Montréal, Québec, Canada
| |
Collapse
|
3
|
Liu J, Wang X, Wang Z, Yang Y, Tang Q, Liu H, Huang H. Unlocking a self-catalytic cycle in a copper-catalyzed aerobic oxidative coupling/cyclization reaction. iScience 2022; 25:103906. [PMID: 35243259 PMCID: PMC8881718 DOI: 10.1016/j.isci.2022.103906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/22/2021] [Accepted: 02/08/2022] [Indexed: 12/16/2022] Open
|
4
|
Guo ZQ, Xu H, Wang X, Wang ZY, Ma B, Dai HX. C3-Arylation of indoles with aryl ketones via C-C/C-H activations. Chem Commun (Camb) 2021; 57:9716-9719. [PMID: 34473138 DOI: 10.1039/d1cc03954g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
C3-Arylation of indoles with aryl ketones is accomplished via palladium-catalyzed ligand-promoted Ar-C(O) cleavage and subsequent C-H arylation of indole. Various (hetero)aryl ketones are compatible in this reaction, affording the corresponding 3-arylindoles in moderate to good yields. Further introduction of an indole moiety into the natural products desoxyestrone and evodiamine demonstrate the synthetic utility of this protocol.
Collapse
Affiliation(s)
- Zi-Qiong Guo
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China.
| | - Hui Xu
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China.
| | - Xing Wang
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen-Yu Wang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Biao Ma
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China.
| | - Hui-Xiong Dai
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
5
|
Xing Q, Zhou C, Jiang S, Chen S, Deng GJ. Acid-catalyzed three-component addition of carbonyl compounds with 1,2,3-triazoles and indoles. Org Biomol Chem 2021; 19:7838-7842. [PMID: 34549239 DOI: 10.1039/d1ob01451j] [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 facile and efficient acid-catalyzed three-component reaction of indoles, 1-tosyl-1,2,3-triazoles and carbonyl compounds has been developed. The use of TsOH with a small amount of water significantly promoted the reaction yield. This method provided a general and one-pot approach for the synthesis of structurally diverse C3-alkylated indole derivatives. The alkylation exclusively occurred at the N2 position of triazoles. Various functional groups were tolerated under the optimized simple reaction conditions.
Collapse
Affiliation(s)
- Qiaoyan Xing
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| | - Chunlan Zhou
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| | - Shuxin Jiang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| | - Shanping Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| |
Collapse
|
6
|
Devkota S, Kim S, Yoo SY, Mohandoss S, Baik MH, Lee YR. Ruthenium(ii)-catalyzed regioselective direct C4- and C5-diamidation of indoles and mechanistic studies. Chem Sci 2021; 12:11427-11437. [PMID: 34567497 PMCID: PMC8409494 DOI: 10.1039/d1sc02138a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/20/2021] [Indexed: 11/21/2022] Open
Abstract
A ruthenium(ii)-catalyzed regioselective direct diamidation of 3-carbonylindoles at the C4- and C5-positions using various dioxazolones is described. This novel protocol allows for the effective installation of two amide groups on the benzene ring in indole. A remarkably broad substrate scope, excellent functional group tolerance, and mild reaction conditions are notable features of this protocol. Further explorations reveal that benzo[b]thiophene-3-carboxaldehyde is a viable substrate and affords its corresponding diamidation products. The diamido indoles are further converted into various functionalized products and used as sensors for metal ion detection. Density functional theory studies are also conducted to propose a reaction mechanism and provide a detailed understanding of the regioselectivity observed in the reaction. Ruthenium(ii)-catalyzed regioselective C4-/C5-diamidation of 3-carbonylindoles is described and a DFT study is conducted to understand the observed regioselectivity and the mechanism.![]()
Collapse
Affiliation(s)
- Shreedhar Devkota
- School of Chemical Engineering, Yeungnam University Gyeongsan 38541 Republic of Korea
| | - Suyeon Kim
- Department of Chemistry, Korea Advanced Institute of Technology (KAIST) Daejeon 34141 Republic of Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Seok Yeol Yoo
- Department of Chemistry, Korea Advanced Institute of Technology (KAIST) Daejeon 34141 Republic of Korea .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Sonaimuthu Mohandoss
- School of Chemical Engineering, Yeungnam University Gyeongsan 38541 Republic of Korea
| | - Mu-Hyun Baik
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea.,Department of Chemistry, Korea Advanced Institute of Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University Gyeongsan 38541 Republic of Korea
| |
Collapse
|
7
|
Synthesis and Antimycobacterial Activity of 3-Phenyl-1 H-indoles. MOLECULES (BASEL, SWITZERLAND) 2021; 26:molecules26175148. [PMID: 34500579 PMCID: PMC8433792 DOI: 10.3390/molecules26175148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 11/16/2022]
Abstract
Tuberculosis has been described as a global health crisis since the 1990s, with an estimated 1.4 million deaths in the last year. Herein, a series of 20 1H-indoles were synthesized and evaluated as in vitro inhibitors of Mycobacterium tuberculosis (Mtb) growth. Furthermore, the top hit compounds were active against multidrug-resistant strains, without cross-resistance with first-line drugs. Exposing HepG2 and Vero cells to the molecules for 72 h showed that one of the evaluated structures was devoid of apparent toxicity. In addition, this 3-phenyl-1H-indole showed no genotoxicity signals. Finally, time-kill and pharmacodynamic model analyses demonstrated that this compound has bactericidal activity at concentrations close to the Minimum Inhibitory Concentration, coupled with a strong time-dependent behavior. To the best of our knowledge, this study describes the activity of 3-phenyl-1H-indole against Mtb for the first time.
Collapse
|
8
|
Ma J, Liu TX, Zhang P, Zhao X, Zhang G. Metal-Free-Catalyzed Three-Component [2+2+2] Annulation Reaction of [60]Fullerene, Ketones, and Indoles: Access to Diverse [60]Fullerene-Fused 1,2-Tetrahydrocarbazoles. Org Lett 2021; 23:1775-1781. [PMID: 33576632 DOI: 10.1021/acs.orglett.1c00195] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The first example of metal-free-catalyzed multicomponent annulation reaction of [60]fullerene has been developed for concise and efficient construction of novel [60]fullerene-fused 1,2-tetrahydrocarbazoles. Using inexpensive and readily available I2 as a catalyst, [60]fullerene, ketones, and indoles undergo a formal [2+2+2] annulation process to conveniently assemble diverse 1,2-tetrahydrocarbazoles. Mechanistic studies indicate that this reaction proceeds through I2-promoted generation of a 3-vinylindole structure with the characteristics of a conjugated diene followed by cycloaddition to [60]fullerene.
Collapse
Affiliation(s)
- Jinliang Ma
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Tong-Xin Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Pengling Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuna Zhao
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| |
Collapse
|
9
|
Jiang P, Chen S, Huang H, Hu K, Xia Y, Deng GJ. Metal-free synthesis of indolo[2,3-b]indoles through aerobic cascade dehydrogenative aromatization/oxidative annulation. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.01.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
|
10
|
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.
Collapse
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
| |
Collapse
|
11
|
Deng K, Huang H, Deng GJ. Recent advances in the transition metal-free oxidative dehydrogenative aromatization of cyclohexanones. Org Biomol Chem 2021; 19:6380-6391. [PMID: 34212968 DOI: 10.1039/d1ob00908g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Cyclohexanone is a simple and widely available raw material that can be obtained from lignin biomass, highlighting its renewable and sustainable features. Cyclohexanone, as an important synthon in organic chemistry, has been demonstrated to be viable for constructing functionalized arenes and benzoheteroarenes, with recent extensive development on transition metal-free oxidative dehydrogenative aromatization. This review focuses on recent research progress on the transition metal-free derivation of cyclohexanones via oxidative dehydrogenative aromatization.
Collapse
Affiliation(s)
- Kun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, China.
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, China.
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, China.
| |
Collapse
|
12
|
Méndez A, Valdez-Camacho JR, Escalante J. Photooxidation of 2-( tert-Butyl)-3-Methyl-2,3,5,6,7,8-Hexahydroquinazolin-4( 1H)-one, an Example of Singlet Oxygen ene Reaction. Molecules 2020; 25:molecules25215008. [PMID: 33137910 PMCID: PMC7662339 DOI: 10.3390/molecules25215008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 11/29/2022] Open
Abstract
Singlet oxygen ene reactions produce 2-(tert-butyl)-4a-hydroperoxy-3-methyl-2,4a, 5,6,7,8-hexahydroquinazolin-4(3H)-one quantitatively during diffusion crystallization of 2-(tert-butyl)-3-methyl-2,3,5,6,7,8-hexahydroquinazolin-4(1H)-one in n-hexane/CH2Cl2 solvent mixture. To confirm this photo-oxidation, a 1H-NMR study in CDCl3 was performed with exposure to ambient conditions (light and oxygen), with neither additional reactants nor catalysts. A theoretical study at the B3LyP/6311++G** level using the QST2 method of locating transition states suggests a two-step mechanism where the intermediate, which unexpectedly did not come from the peroxide intermediate, has a low activation energy.
Collapse
|
13
|
Qiu Z, Zeng H, Li CJ. Coupling without Coupling Reactions: En Route to Developing Phenols as Sustainable Coupling Partners via Dearomatization-Rearomatization Processes. Acc Chem Res 2020; 53:2395-2413. [PMID: 32941014 DOI: 10.1021/acs.accounts.0c00479] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Transition-metal-catalyzed cross-coupling reactions represent one of the most straightforward and efficient protocols to assemble two different molecular motifs for the construction of carbon-carbon or carbon-heteroatom bonds. Because of their importance and wide applications in pharmaceuticals, agrochemicals, materials, etc., cross-coupling reactions have been well recognized in the 2010 Nobel Prize in chemistry. However, in the classical transition-metal-catalyzed cross-coupling reactions (e.g., the Suzuki-Miyaura, the Buchwald-Hartwig, and the Ullmann cross-coupling reactions), organohalides, which mainly stem from the nonrenewable fossil resources, are often utilized as coupling partners with halide wastes being generated after the reactions. To make cross-coupling reactions more sustainable, we initiated a general research program by employing phenols and cyclohexa(e)nones (the reduced forms of phenols) as pivotal feedstocks (coupling partners), instead of the commonly used fossil-derived organohalides, for cross-coupling reactions to build C-O, C-N, and C-C bonds. Phenols (cyclohexa(e)nones) are widely available and can be obtained from lignin biomass, highlighting their renewable and sustainable features. Moreover, water is expected to be the only stoichiometric byproduct, thus avoiding halide wastes.Notably, the cross-coupling reactions utilizing phenols/cyclohexa(e)nones are not based on the traditional transition-metal-catalyzed "oxidative-addition and reductive-elimination" mechanism, but via a novel "phenol-cyclohexanone" redox couple. This new working mechanism opens up new horizons of designing cross-coupling reactions via simple nucleophilic addition of cyclohexanones along with aromatization processes, thereby simplifying the design and avoiding laborious optimization of transition-metal precursors (e.g., Pd, Ni, Cu, etc.), as well as ligands in classical transition-metal-catalyzed cross-coupling reactions. Specifically, in this Account, we will summarize and discuss our related research work in the following three categories: "formal oxidative couplings of cyclohexa(e)nones", "formal reductive couplings of phenols", and "formal redox-neutral couplings of phenols". The successes of these research projects clearly demonstrated our initial inspirations and rational designs to develop cross-coupling reactions without the "conventional cross-coupling conditions" by pushing the reaction frontiers from initial cyclohexanones, ultimately, to the sustainable phenol targets.
Collapse
Affiliation(s)
- Zihang Qiu
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Huiying Zeng
- The State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Road, Lanzhou 730000, P. R. China
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| |
Collapse
|
14
|
Jiang P, Chen S, Xia Y, Zhang Q, Deng GJ. Access to Dibenzofurans through Dimerization/Trimerization of Cyclohexanones Followed by Dehydroaromatization. Org Lett 2020; 22:8076-8081. [DOI: 10.1021/acs.orglett.0c03023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Pingyu Jiang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Shanping Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Yi Xia
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Qingqing Zhang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| |
Collapse
|
15
|
Qiu Z, Li CJ. Transformations of Less-Activated Phenols and Phenol Derivatives via C–O Cleavage. Chem Rev 2020; 120:10454-10515. [DOI: 10.1021/acs.chemrev.0c00088] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zihang Qiu
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| |
Collapse
|
16
|
Lokhande† SK, Vaidya† GN, Satpute DP, Venkatesh A, Kumar S, Kumar D. Structure Ligation Relationship of Amino Acids for the Selective Indole C−H Arylation Reaction: L‐Aspartic acid as Sustainable Alternative of Phosphine Ligands. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000426] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shyam Kumar Lokhande†
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) – Ahmedabad, Palaj Gandhinagar 382355, Gujarat India
| | - Gargi Nikhil Vaidya†
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) – Ahmedabad, Palaj Gandhinagar 382355, Gujarat India
| | - Dinesh Parshuram Satpute
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) – Ahmedabad, Palaj Gandhinagar 382355, Gujarat India
| | - Ashwini Venkatesh
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) – Ahmedabad, Palaj Gandhinagar 382355, Gujarat India
| | - Sanjeev Kumar
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) – Ahmedabad, Palaj Gandhinagar 382355, Gujarat India
| | - Dinesh Kumar
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) – Ahmedabad, Palaj Gandhinagar 382355, Gujarat India
| |
Collapse
|
17
|
Liu S, Zhao F, Chen X, Deng G, Huang H. Aerobic Oxidative Functionalization of Indoles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000285] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Saiwen Liu
- College of Materials and Chemical Engineering Hunan City University Yiyang 413000 Hunan People's Republic of China
| | - Feng Zhao
- Key Laboratory for Antibody-based Drug and Intelligent Delivery System of Hunan Province Key Laboratory of Dong Medicine of Hunan Province School of Pharmaceutical Sciences Hunan University of Medicine Huaihua 418000 People's Republic of China
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Xing Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Guo‐Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| |
Collapse
|
18
|
Ban K, Yamamoto Y, Sajiki H, Sawama Y. Arylation of indoles using cyclohexanones dually-catalyzed by niobic acid and palladium-on-carbons. Org Biomol Chem 2020; 18:3898-3902. [PMID: 32400844 DOI: 10.1039/d0ob00702a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
3-Arylindoles were easily constructed from indoles and cyclohexanone derivatives using a combination of catalytic niobic acid-on-carbon (Nb2O5/C) and palladium-on-carbon (Pd/C) under heating conditions without any oxidants. The Lewis acidic Nb2O5/C promoted the nucleophilic addition of indoles to the cyclohexanones, and the subsequent dehydration and Pd/C-catalyzed dehydrogenation produced the 3-arylindoles. The additive 2,3-dimethyl-1,3-butadiene worked as a hydrogen acceptor to facilitate the dehydrogenation step.
Collapse
Affiliation(s)
- Kazuho Ban
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigakunishi, Gifu 501-1196, Japan.
| | | | | | | |
Collapse
|
19
|
Xu C, Xie W, Xu J. Metal-free and regiospecific synthesis of 3-arylindoles. Org Biomol Chem 2020; 18:2661-2671. [PMID: 32196059 DOI: 10.1039/d0ob00317d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A convenient, metal-free, and organic acid-base promoted synthetic method to prepare 3-arylindoles from 3-aryloxirane-2-carbonitriles and arylhydrazine hydrochlorides has been developed. In the reaction, the organic acid catalyzes a tandem nucleophilic ring-opening reaction of aryloxiranecarbonitriles and arylhydrazine hydrochlorides and Fischer indolization. The organic base triethylamine plays a crucial role in the final elimination step in the Fischer indole synthesis, affording 3-arylindoles regiospecifically. The reaction features advantages of microwave acceleration, non-metal participation, short reaction time, organic acid-base co-catalysis, and broad substrate scope.
Collapse
Affiliation(s)
- Chuangchuang Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Wenlai Xie
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
| |
Collapse
|
20
|
Takayama S, Yatabe T, Koizumi Y, Jin X, Nozaki K, Mizuno N, Yamaguchi K. Synthesis of unsymmetrically substituted triarylamines via acceptorless dehydrogenative aromatization using a Pd/C and p-toluenesulfonic acid hybrid relay catalyst. Chem Sci 2020; 11:4074-4084. [PMID: 34122873 PMCID: PMC8152582 DOI: 10.1039/c9sc06442g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
An efficient and convenient procedure for synthesizing triarylamines based on a dehydrogenative aromatization strategy has been developed. A hybrid relay catalyst comprising carbon-supported Pd (Pd/C) and p-toluenesulfonic acid (TsOH) was found to be effective for synthesizing a variety of triarylamines bearing different aryl groups starting from arylamines (diarylamines or anilines), using cyclohexanones as the arylation sources under acceptorless conditions with the release of gaseous H2. The proposed reaction comprises the following relay steps: condensation of arylamines and cyclohexanones to produce imines or enamines, dehydrogenative aromatization of the imines or enamines over Pd nanoparticles (NPs), and elimination of H2 from the Pd NPs. In this study, an interesting finding was obtained indicating that TsOH may promote the dehydrogenation. An efficient and convenient procedure for synthesizing triarylamines based on a dehydrogenative aromatization strategy has been developed.![]()
Collapse
Affiliation(s)
- Satoshi Takayama
- Department of Applied Chemistry, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan +81-3-5841-7220
| | - Takafumi Yatabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan +81-3-5841-7220
| | - Yu Koizumi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan +81-3-5841-7220
| | - Xiongjie Jin
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Noritaka Mizuno
- Department of Applied Chemistry, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan +81-3-5841-7220
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan +81-3-5841-7220
| |
Collapse
|
21
|
Zeng H, Yu J, Li CJ. Palladium-catalyzed aerobic synthesis of ortho-substituted phenols from cyclohexanones and primary alcohols. Chem Commun (Camb) 2020; 56:1239-1242. [DOI: 10.1039/c9cc09347h] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An aerobic palladium catalyzed site-specific synthesis of ortho-substituted phenols from cyclohexanones and primary alcohols via an oxidation/aldol/dehydration/aromatization process has been developed.
Collapse
Affiliation(s)
- Huiying Zeng
- The State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Jianjin Yu
- The State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis
- McGill University
- Montreal
- Canada
| |
Collapse
|
22
|
Singh H, Tiwari R, Sharma P, Kumar P, Jain N. Zinc triflate catalyzed 1,3-indolylation of cyclohexanones: tandem condensation, dehydrogenation and aromatization sequence. Org Biomol Chem 2020; 18:2492-2500. [DOI: 10.1039/d0ob00163e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
1,3-Bis(1-alkyl-1H-indol-3-yl)benzene derivatives have been synthesized through a Zn(OTf)2 catalyzed reaction between cyclohexanones and indoles.
Collapse
Affiliation(s)
- Himanshu Singh
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
| | - Rajat Tiwari
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
| | - Poonam Sharma
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
| | - Pramod Kumar
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
| | - Nidhi Jain
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
| |
Collapse
|
23
|
Lu G, Luo N, Hu F, Ban Z, Zhan Z, Huang G. Transition‐Metal‐Free Synthesis of 1,2‐diphenyl‐1
H
‐benzo[
d
] Imidazole Derivatives from
N
‐phenylbenzimidamides and Cyclohexanones. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Guoqiang Lu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| | - Nan Luo
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| | - Fangpeng Hu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| | - Zihui Ban
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| | - Zhenzhen Zhan
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| | - Guo‐Sheng Huang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| |
Collapse
|
24
|
Zhang J, Liu ZW, Ao YL, Hu LJ, Wei CJ, Zhang QH, Yuan MF, Wang Y, Zhang QW, Ye WC, Zhang XQ. Hunterines A-C, Three Unusual Monoterpenoid Indole Alkaloids from Hunteria zeylanica. J Org Chem 2019; 84:14892-14897. [PMID: 31475536 DOI: 10.1021/acs.joc.9b01835] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Three new monoterpenoid indole alkaloids (MIAs), hunterines A-C (1-3), were isolated from Hunteria zeylanica. Compound 1 possesses a unique skeleton with an unprecedented azabicyclo[4.3.1]decane ring system. Compounds 2 and 3 are a pair of epimeric vobasinylindole alkaloid heterodimers. Their structures including absolute configurations were established by spectroscopic analyses, X-ray diffraction, computational calculation, and the modified Mosher's method. Plausible biogenetic pathways of 1-3 were also proposed. Alkaloid 1 showed moderate cytotoxic activity against the HepG2 cell line.
Collapse
Affiliation(s)
- Jian Zhang
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China.,State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences , University of Macau , Macao SAR , P.R. China
| | - Zhi-Wen Liu
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Yun-Lin Ao
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Li-Jun Hu
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Cui-Jie Wei
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Qing-Hua Zhang
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Meng-Fei Yuan
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Qing-Wen Zhang
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences , University of Macau , Macao SAR , P.R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| | - Xiao-Qi Zhang
- Institute of Traditional Chinese Medicine & Natural Products, and Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , P.R. China
| |
Collapse
|
25
|
Chen S, Zhang M, Su R, Chen X, Feng B, Yang Y, You J. C2/C4 Regioselective Heteroarylation of Indoles by Tuning C–H Metalation Modes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01273] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shuyou Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Min Zhang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Rongchuan Su
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Xingyu Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Boya Feng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Yudong Yang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| |
Collapse
|
26
|
Wang Z, Zeng H, Li CJ. Dearomatization–Rearomatization Strategy for Reductive Cross-Coupling of Indoles with Ketones in Water. Org Lett 2019; 21:2302-2306. [PMID: 30908058 DOI: 10.1021/acs.orglett.9b00591] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zemin Wang
- The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, 222 Tianshui Road, Lanzhou 730000, People’s Republic of China
| | - Huiying Zeng
- The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, 222 Tianshui Road, Lanzhou 730000, People’s Republic of China
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| |
Collapse
|
27
|
Aggarwal T, Sushmita S, Verma AK. Recent advances in the synthesis of carbazoles from indoles. Org Biomol Chem 2019; 17:8330-8342. [DOI: 10.1039/c9ob01381d] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Synthesis of carbazoles using indoles as precursors through CH activation/annulation.
Collapse
Affiliation(s)
- Trapti Aggarwal
- Synthetic Organic Chemistry Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Sushmita Sushmita
- Synthetic Organic Chemistry Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Akhilesh K. Verma
- Synthetic Organic Chemistry Laboratory
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| |
Collapse
|
28
|
Lu C, Huang H, Tuo X, Jiang P, Zhang F, Deng GJ. Chemoselective metal-free indole arylation with cyclohexanones. Org Chem Front 2019. [DOI: 10.1039/c9qo00603f] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Elemental sulfur- and iodine reagent-mediated indole C3 arylations have been developed with cyclohexanones as the arylating reagent.
Collapse
Affiliation(s)
- Chaogang Lu
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
- China
| | - Huawen Huang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
- China
| | - Xiaolong Tuo
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
- China
| | - Pingyu Jiang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
- China
| | - Feng Zhang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
- China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
- China
| |
Collapse
|
29
|
Xu Z, Huang H, Chen H, Deng GJ. Catalyst- and additive-free annulation/aromatization leading to benzothiazoles and naphthothiazoles. Org Chem Front 2019. [DOI: 10.1039/c9qo00592g] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalyst- and additive-free three-component annulation/aromatization enable a highly efficient entry to naphtho[1,2-d]thiazoles and benzo[d]thiazoles.
Collapse
Affiliation(s)
- Zhenhua Xu
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Hongbiao Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| |
Collapse
|
30
|
Li PG, Yang Y, Zhu S, Li HX, Zou LH. Pd-Catalyzed Regioselective Direct Double C-H Arylation of 6,7-Benzindoles. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801473] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ping-Gui Li
- State Key Laboratory of Coordination Chemistry and Chemical Engineering; Nanjing University; Xianlin Avenue 163 210093 Nanjing P. R. China
- School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
| | - Youqing Yang
- State Key Laboratory of Coordination Chemistry and Chemical Engineering; Nanjing University; Xianlin Avenue 163 210093 Nanjing P. R. China
| | - Shuai Zhu
- School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
| | - Hong-Xi Li
- School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
| | - Liang-Hua Zou
- School of Pharmaceutical Sciences; Jiangnan University; Lihu Avenue 1800 214122 Wuxi P.R. China
| |
Collapse
|
31
|
Zhou Y, Deng S, Mai S, Song Q. Cu-Catalyzed Denitrogenative Ring-Opening of 3-Aminoindazoles for the Synthesis of Aromatic Nitrile-Containing (Hetero)Arenes. Org Lett 2018; 20:6161-6165. [DOI: 10.1021/acs.orglett.8b02629] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yao Zhou
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
| | - Shuilin Deng
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
| | - Shaoyu Mai
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, P.R. China
| |
Collapse
|
32
|
Wang Z, Chen X, Xie H, Wang D, Huang H, Deng GJ. Synthesis of o-Arylenediamines through Elemental Sulfur-Promoted Aerobic Dehydrogenative Aromatization of Cyclohexanones with Arylamines. Org Lett 2018; 20:5470-5473. [DOI: 10.1021/acs.orglett.8b02387] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zhen Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Xiangui Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Hao Xie
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Dahan Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| |
Collapse
|
33
|
O'Brien CJ, Droege DG, Jiu AY, Gandhi SS, Paras NA, Olson SH, Conrad J. Photoredox Cyanomethylation of Indoles: Catalyst Modification and Mechanism. J Org Chem 2018; 83:8926-8935. [PMID: 29940725 PMCID: PMC6097937 DOI: 10.1021/acs.joc.8b01146] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The direct cyanomethylation of indoles at the 2- or 3-position was achieved via photoredox catalysis. The versatile nitrile synthon is introduced as a radical generated from bromoacetonitrile, a photocatalyst, and blue LED as a light source. The mechanism of the reaction is explored by determination of the Stern-Volmer quenching constants. By combining photophysical data and mass spectrometry to follow the catalyst decomposition, the catalyst ligands were tuned to enable synthetically useful yields of radical coupling products. A range of indole substrates with alkyl, aryl, halogen, ester, and ether functional groups participate in the reaction, affording products in 16-90% yields. The reaction allows the rapid construction of synthetically useful cyanomethylindoles, products that otherwise require several synthetic steps.
Collapse
Affiliation(s)
- Connor J O'Brien
- Institute for Neurodegenerative Diseases (IND), UCSF Weill Institute for Neurosciences , University of California , San Francisco , California 94158 , United States
| | - Daniel G Droege
- Institute for Neurodegenerative Diseases (IND), UCSF Weill Institute for Neurosciences , University of California , San Francisco , California 94158 , United States
| | - Alexander Y Jiu
- Institute for Neurodegenerative Diseases (IND), UCSF Weill Institute for Neurosciences , University of California , San Francisco , California 94158 , United States
| | - Shivaani S Gandhi
- Institute for Neurodegenerative Diseases (IND), UCSF Weill Institute for Neurosciences , University of California , San Francisco , California 94158 , United States
| | - Nick A Paras
- Institute for Neurodegenerative Diseases (IND), UCSF Weill Institute for Neurosciences , University of California , San Francisco , California 94158 , United States
| | - Steven H Olson
- Institute for Neurodegenerative Diseases (IND), UCSF Weill Institute for Neurosciences , University of California , San Francisco , California 94158 , United States
| | - Jay Conrad
- Institute for Neurodegenerative Diseases (IND), UCSF Weill Institute for Neurosciences , University of California , San Francisco , California 94158 , United States
| |
Collapse
|
34
|
Nosova EV, Lipunova GN, Charushin VN, Chupakhin ON. Fluorine-containing indoles: Synthesis and biological activity. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.05.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
35
|
Tereniak SJ, Landis CR, Stahl SS. Are Phosphines Viable Ligands for Pd-Catalyzed Aerobic Oxidation Reactions? Contrasting Insights from a Survey of Six Reactions. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephen J. Tereniak
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| |
Collapse
|
36
|
Ji X, Li D, Wang Z, Tan M, Huang H, Deng GJ. Visible Light-Induced Aerobic Oxidation of Indoles: One-Pot Formation of 4-Quinolones at Room Temperature. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800036] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Xiaochen Ji
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Dongdong Li
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Zhongzhen Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Muyun Tan
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; Xiangtan 411105 China
| |
Collapse
|
37
|
Liang YF, Yuan Y, Shen T, Song S, Jiao N. Metal-Free I2
-Catalyzed Highly Selective Dehydrogenative Coupling of Alcohols and Cyclohexenones. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201700743] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yu-Feng Liang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences; Peking University, Xue Yuan Rd. 38; Beijing 100191 China
| | - Yizhi Yuan
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences; Peking University, Xue Yuan Rd. 38; Beijing 100191 China
| | - Tao Shen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences; Peking University, Xue Yuan Rd. 38; Beijing 100191 China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences; Peking University, Xue Yuan Rd. 38; Beijing 100191 China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences; Peking University, Xue Yuan Rd. 38; Beijing 100191 China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University, Weijin Road 94; Tianjin 300071 China
| |
Collapse
|
38
|
Liu X, Chen J, Ma T. Catalytic dehydrogenative aromatization of cyclohexanones and cyclohexenones. Org Biomol Chem 2018; 16:8662-8676. [DOI: 10.1039/c8ob02351d] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Prompted by the scant attention paid by published literature reviews to the comprehensive catalytic dehydrogenative aromatization of cyclohexa(e)nones, this review describes recent methods developed to-date involving transition-metal-catalyzed oxidative aromatization and metal-free strategies for the transformation of cyclohexa(e)nones to substituted phenols.
Collapse
Affiliation(s)
- Xueli Liu
- College of Material and Chemical Engineering
- Chuzhou University
- Chuzhou
- China
| | - Jun Chen
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou
- China
- Department of Biomedical and Pharmaceutical Sciences
| | - Tianlin Ma
- College of Material and Chemical Engineering
- Chuzhou University
- Chuzhou
- China
| |
Collapse
|
39
|
Ji X, Li D, Wang Z, Tan M, Huang H, Deng GJ. Aerobic C-C Bond Cleavage of Indoles by Visible-Light Photoredox Catalysis with Ru(bpy)3
2+. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701245] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaochen Ji
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Dongdong Li
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Zhongzhen Wang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Muyun Tan
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Huawen Huang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
- Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry; Chinese Academy of Sciences (CAS); 100190 Beijing P. R. China
| |
Collapse
|
40
|
Chen X, Zheng G, Li Y, Song G, Li X. Rhodium-Catalyzed Site-Selective Coupling of Indoles with Diazo Esters: C4-Alkylation versus C2-Annulation. Org Lett 2017; 19:6184-6187. [DOI: 10.1021/acs.orglett.7b03099] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xiaohong Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Beijing
Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Guangfan Zheng
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yunyun Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Guoyong Song
- Beijing
Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Xingwei Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| |
Collapse
|
41
|
Chen S, Wang L, Zhang J, Hao Z, Huang H, Deng GJ. Modular Synthesis of Carbazole-Based Conjugated Molecules through a One-Pot Annulation/Dehydrogenation Sequence. J Org Chem 2017; 82:11182-11191. [DOI: 10.1021/acs.joc.7b02305] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Shanping Chen
- Key Laboratory for Green
Organic Synthesis and Application of Hunan Province, Key Laboratory
of Environmentally Friendly Chemistry and Application of Ministry
of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Liren Wang
- Key Laboratory for Green
Organic Synthesis and Application of Hunan Province, Key Laboratory
of Environmentally Friendly Chemistry and Application of Ministry
of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Jing Zhang
- Key Laboratory for Green
Organic Synthesis and Application of Hunan Province, Key Laboratory
of Environmentally Friendly Chemistry and Application of Ministry
of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Zhaoran Hao
- Key Laboratory for Green
Organic Synthesis and Application of Hunan Province, Key Laboratory
of Environmentally Friendly Chemistry and Application of Ministry
of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Huawen Huang
- Key Laboratory for Green
Organic Synthesis and Application of Hunan Province, Key Laboratory
of Environmentally Friendly Chemistry and Application of Ministry
of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Key Laboratory for Green
Organic Synthesis and Application of Hunan Province, Key Laboratory
of Environmentally Friendly Chemistry and Application of Ministry
of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| |
Collapse
|
42
|
Qiu Z, Li JS, Li CJ. Formal aromaticity transfer for palladium-catalyzed coupling between phenols and pyrrolidines/indolines. Chem Sci 2017; 8:6954-6958. [PMID: 29147521 PMCID: PMC5642148 DOI: 10.1039/c7sc02578e] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 08/09/2017] [Indexed: 12/15/2022] Open
Abstract
We herein describe a palladium-catalyzed formal aromaticity transfer coupling reaction between phenols and pyrrolidines or indolines to generate the corresponding N-cyclohexyl pyrroles or indoles. In this transformation, the aromaticity of phenols is formally passed on to the pyrrolidine or indoline units. Substituted phenols thus can serve as latent cyclohexyl equivalents for the fast construction of various N-cyclohexyl pyrroles and indoles.
Collapse
Affiliation(s)
- Zihang Qiu
- Department of Chemistry , FQRNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
| | - Jiang-Sheng Li
- Department of Chemistry , FQRNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
- School of Chemistry and Biological Engineering , Changsha University of Science & Technology , Changsha 410114 , China
| | - Chao-Jun Li
- Department of Chemistry , FQRNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
| |
Collapse
|
43
|
Chen C, Chen X, Zhao H, Jiang H, Zhang M. Direct Access to Nitrogen Bi-heteroarenes via Iridium-Catalyzed Hydrogen-Evolution Cross-Coupling Reaction. Org Lett 2017; 19:3390-3393. [DOI: 10.1021/acs.orglett.7b01349] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chunlian Chen
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering, South China University of Technology, Wushan Road-381, Guangzhou 510641 ,People’s Republic of China
| | - Xiuwen Chen
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering, South China University of Technology, Wushan Road-381, Guangzhou 510641 ,People’s Republic of China
| | - He Zhao
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering, South China University of Technology, Wushan Road-381, Guangzhou 510641 ,People’s Republic of China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering, South China University of Technology, Wushan Road-381, Guangzhou 510641 ,People’s Republic of China
| | - Min Zhang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering, South China University of Technology, Wushan Road-381, Guangzhou 510641 ,People’s Republic of China
| |
Collapse
|
44
|
Chen S, Feng B, Zheng X, Yin J, Yang S, You J. Iridium-Catalyzed Direct Regioselective C4-Amidation of Indoles under Mild Conditions. Org Lett 2017; 19:2502-2505. [DOI: 10.1021/acs.orglett.7b00730] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shuyou Chen
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Boya Feng
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Xuesong Zheng
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Jiangliang Yin
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Shiping Yang
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| |
Collapse
|
45
|
Taniguchi K, Jin X, Yamaguchi K, Nozaki K, Mizuno N. Versatile routes for synthesis of diarylamines through acceptorless dehydrogenative aromatization catalysis over supported gold-palladium bimetallic nanoparticles. Chem Sci 2017; 8:2131-2142. [PMID: 28507665 PMCID: PMC5407272 DOI: 10.1039/c6sc04455g] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 11/26/2016] [Indexed: 12/13/2022] Open
Abstract
Diarylamines are an important class of widely utilized chemicals, and development of diverse procedures for their synthesis is of great importance. Herein, we have successfully developed novel versatile catalytic procedures for the synthesis of diarylamines through acceptorless dehydrogenative aromatization. In the presence of a gold-palladium alloy nanoparticle catalyst (Au-Pd/TiO2), various symmetrically substituted diarylamines could be synthesized starting from cyclohexylamines. The observed catalysis of Au-Pd/TiO2 was heterogeneous in nature and Au-Pd/TiO2 could be reused several times without severe loss of catalytic performance. This transformation needs no oxidants and generates molecular hydrogen (three equivalents with respect to cyclohexylamines) and ammonia as the side products. These features highlight the environmentally benign nature of the present transformation. Furthermore, in the presence of Au-Pd/TiO2, various kinds of structurally diverse unsymmetrically substituted diarylamines could successfully be synthesized starting from various combinations of substrates such as (i) anilines and cyclohexanones, (ii) cyclohexylamines and cyclohexanones, and (iii) nitrobenzenes and cyclohexanols. The role of the catalyst and the reaction pathways were investigated in detail for the transformation of cyclohexylamines. The catalytic performance was strongly influenced by the nature of the catalyst. In the presence of a supported gold nanoparticle catalyst (Au/TiO2), the desired diarylamines were hardly produced. Although a supported palladium nanoparticle catalyst (Pd/TiO2) gave the desired diarylamines, the catalytic activity was inferior to that of Au-Pd/TiO2. Moreover, the activity of Au-Pd/TiO2 was superior to that of a physical mixture of Au/TiO2 and Pd/TiO2. The present Au-Pd/TiO2-catalyzed transformation of cyclohexylamines proceeds through complex pathways comprising amine dehydrogenation, imine disproportionation, and condensation reactions. The amine dehydrogenation and imine disproportionation reactions are effectively promoted by palladium (not by gold), and the intrinsic catalytic performance of palladium is significantly improved by alloying with gold. One possible explanation of the alloying effect is the formation of electron-poor palladium species that can effectively promote the β-H elimination step in the rate-limiting amine dehydrogenation.
Collapse
Affiliation(s)
- Kento Taniguchi
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan . ;
| | - Xiongjie Jin
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan . ;
| | - Kazuya Yamaguchi
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan . ;
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan
| | - Noritaka Mizuno
- Department of Applied Chemistry , School of Engineering , The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku , Tokyo 113-8656 , Japan . ;
| |
Collapse
|
46
|
Chen S, Li Y, Ni P, Yang B, Huang H, Deng GJ. One-Pot Cascade Synthesis of Substituted Carbazoles from Indoles, Ketones, and Alkenes Using Oxygen as the Oxidant. J Org Chem 2017; 82:2935-2942. [DOI: 10.1021/acs.joc.6b02892] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shanping Chen
- Key Laboratory
of Environmentally
Friendly Chemistry and Application of Ministry of Education, College
of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Yuxia Li
- Key Laboratory
of Environmentally
Friendly Chemistry and Application of Ministry of Education, College
of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Penghui Ni
- Key Laboratory
of Environmentally
Friendly Chemistry and Application of Ministry of Education, College
of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Baichuan Yang
- Key Laboratory
of Environmentally
Friendly Chemistry and Application of Ministry of Education, College
of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Huawen Huang
- Key Laboratory
of Environmentally
Friendly Chemistry and Application of Ministry of Education, College
of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Key Laboratory
of Environmentally
Friendly Chemistry and Application of Ministry of Education, College
of Chemistry, Xiangtan University, Xiangtan 411105, China
| |
Collapse
|
47
|
Vignesh A, Kaminsky W, Dharmaraj N. Arylation ofN-Methyl-2-oxindole with Arylboronic Acids in Water Catalyzed by Palladium(II) Pincer Complexes with a Low Catalyst Loading. ChemCatChem 2017. [DOI: 10.1002/cctc.201601411] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Arumugam Vignesh
- Inorganic&Nanomaterials Research Laboratory; Department of Chemistry; Bharathiar University; Coimbatore 641 046 India
| | - Werner Kaminsky
- Department of Chemistry; University of Washington; Seattle Washington 98195 USA
| | - Nallasamy Dharmaraj
- Inorganic&Nanomaterials Research Laboratory; Department of Chemistry; Bharathiar University; Coimbatore 641 046 India
| |
Collapse
|
48
|
Chen X, Xie Y, Li C, Xiao F, Deng GJ. Synthesis of Substituted Acridines through a Palladium-Catalyzed Condensation/Cyclization/Tautomerization Sequence. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601553] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xiangui Chen
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Yanjun Xie
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Cheng Li
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Fuhong Xiao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education; College of Chemistry; Xiangtan University; 411105 Xiangtan China
- Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry; Chinese Academy of Sciences (CAS); 100190 Beijing China
| |
Collapse
|
49
|
Liu XJ, Wang WP, Huo CD, Wang XC, Quan ZJ. Palladium-catalyzed dehydrogenation of dihydro-heterocycles using isoprene as the hydrogen acceptor without oxidants. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02038k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and general method for Pd-catalyzed dehydrogenative aromatization of dihydro-heteroatom compounds without external O2 and H2 is first described.
Collapse
Affiliation(s)
- Xiao-Jun Liu
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Wen-Peng Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Cong-De Huo
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Xi-Cun Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Zheng-Jun Quan
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| |
Collapse
|
50
|
Kilic H, Bayindir S, Erdogan E, Agopcan Cinar S, Konuklar FAS, Bali SK, Saracoglu N, Aviyente V. Bismuth nitrate-promoted disproportionative condensation of indoles with cyclohexanone: a new-type azafulvenium reactivity of indole. NEW J CHEM 2017. [DOI: 10.1039/c7nj01987d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The bismuth nitrate-promoted disproportionative condensation of indoles with cyclohexanone in one pot, to yield C3-cyclohexyl substituted indoles and 1,3-di(1H-indol-3-yl)benzene derivatives is reported for the first time.
Collapse
Affiliation(s)
- H. Kilic
- Department of Chemistry
- Faculty of Sciences
- Atatürk University
- Erzurum
- Turkey
| | - S. Bayindir
- Department of Chemistry
- Faculty of Sciences
- Atatürk University
- Erzurum
- Turkey
| | - E. Erdogan
- Department of Chemistry
- Faculty of Sciences
- Atatürk University
- Erzurum
- Turkey
| | - S. Agopcan Cinar
- Department of Chemistry
- Faculty of Arts and Sciences
- Boğaziçi University
- Istanbul
- Turkey
| | | | - S. K. Bali
- Department of Chemistry
- Faculty of Arts and Sciences
- Boğaziçi University
- Istanbul
- Turkey
| | - N. Saracoglu
- Department of Chemistry
- Faculty of Sciences
- Atatürk University
- Erzurum
- Turkey
| | - V. Aviyente
- Department of Chemistry
- Faculty of Arts and Sciences
- Boğaziçi University
- Istanbul
- Turkey
| |
Collapse
|