1
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Huang C, Jin Z, Zhang B, Zhou Y, Lin H, Kang H, Shen G, Lv X. One-pot synthesis of 4-(imidazol-1-yl)indole derivatives through a sequential dearomatization and Ag-catalyzed cyclization/Cs 2CO 3-mediated addition/aromatization reaction. Org Biomol Chem 2023; 21:4245-4256. [PMID: 37145103 DOI: 10.1039/d3ob00316g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A convenient one-pot assembly of 4-(imidazol-1-yl)indole derivatives from easily accessible o-alkynylanilines and imidazoles has been developed. The sequential dearomatization and Ag(I)-catalyzed cyclization/Cs2CO3-mediated conjugate addition/aromatization cascade reactions exhibit high efficiency and excellent selectivity. The combined use of a silver(I) salt and cesium carbonate is significant for facilitating this domino transformation. The 4-(imidazol-1-yl)indole products could be easily converted to the corresponding derivatives and might be valuable in biological chemistry and medicinal science.
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Affiliation(s)
- Chaoman Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People's Republic of China.
| | - Zefeng Jin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People's Republic of China.
| | - Bei Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People's Republic of China.
| | - Yuanyuan Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People's Republic of China.
| | - Huiting Lin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People's Republic of China.
| | - Honglan Kang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People's Republic of China.
| | - Guodong Shen
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252059, Shandong, People's Republic of China
| | - Xin Lv
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People's Republic of China.
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2
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Polimera SR, Ilangovan A, Meanwell NA, Subbaiah MAM. Synthetic Access to α-Oxoketene Aminals by the Nucleophilic Addition of Enol Silane-Derived Palladium(II) Enolates to Carbodiimides. J Org Chem 2022; 87:14778-14792. [PMID: 36285601 DOI: 10.1021/acs.joc.2c02107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Synthetically important α-oxoketene aminal intermediates can now be accessed from readily available and inexpensive carbodiimides as starting materials via the nucleophilic addition of palladium enolates derived from enol silane precursors. This operationally simple method features mild reaction conditions, including open air atmosphere, ligand-free metal catalysis, broad substrate scope, and multi-gram scalability. Select synthetic applications that take advantage of the enamine character of α-oxoketene aminals and involve C-nucleophilic additions to electrophilic systems, including an α,β-unsaturated ester, an azo dicarboxylate, an aralkyl halide, and an aldehyde, are demonstrated.
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Affiliation(s)
- Subba Rao Polimera
- Department of Medicinal Chemistry, Biocon Bristol Myers Squibb R&D Centre, Biocon Park, Bommasandra IV Phase, Jigani Link Road, Bangalore, Karnataka 560099, India.,Department of Chemistry, Bharathidasan University, Palkalaiperur, Thiruchirapalli, Tamil Nadu 620024, India
| | - Andivelu Ilangovan
- Department of Chemistry, Bharathidasan University, Palkalaiperur, Thiruchirapalli, Tamil Nadu 620024, India
| | - Nicholas A Meanwell
- Department of Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Murugaiah A M Subbaiah
- Department of Medicinal Chemistry, Biocon Bristol Myers Squibb R&D Centre, Biocon Park, Bommasandra IV Phase, Jigani Link Road, Bangalore, Karnataka 560099, India
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3
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Xu T, He Q, Fan R. Synthesis of C7-Functionalized Indoles through an Aromaticity Destruction-Reconstruction Process. Org Lett 2022; 24:2665-2669. [PMID: 35377659 DOI: 10.1021/acs.orglett.2c00733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A process for the synthesis of C7-functionalized indoles using para-substituted 2-alkynylanilines as starting materials was reported. The process involves a dearomatization, an 1,2-addition by organic lithium or Grignard reagents, an aromatization-driven allylic rearrangement, and a cyclization. A variety of groups including alkyl, aryl, alkenyl, or alkynyl groups were selectively installed at the C7 site of indoles leading to the formation of 2,5,7-trisubstituted indoles.
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Affiliation(s)
- Tingxuan Xu
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Qiuqin He
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
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4
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Festa A, Raspertov P, Voskressensky L. 2‐(Alkynyl)anilines and derivatives – versatile reagents for heterocyclic synthesis. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexey Festa
- Peoples' Friendship University of Russia RUSSIAN FEDERATION
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5
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Li X, He Q, Fan R. Divergent synthesis of 4-amino indoles with free amine groups via tandem reaction of 2-alkynylanilines. Org Chem Front 2022. [DOI: 10.1039/d2qo00675h] [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 dearomatization method for divergent synthesis of 4-amino indoles having N1 or C4 free amine groups from 2-alkynylanilines was reported.
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Affiliation(s)
- Xiaohua Li
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Qiuqin He
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
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6
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Polimera SR, A M Subbaiah M, Ilangovan A. The Ligand Free Palladium(II)-Catalyzed Regioselective 1,2-Addition of Enol Silanes to Quinones to Access 4-Hydroxy-4-(2-oxo-2-arylethyl)cyclohexadien-1-ones and Synthetic Applications. J Org Chem 2021; 86:14356-14370. [PMID: 34554740 DOI: 10.1021/acs.joc.1c00857] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In contrast to the conventional 1,4-addition process, regioselective 1,2-addition of silyl enol ethers to quinones can now be achieved via a palladium(II) enolate pathway that provides access to 4-hydroxy-4-(2-oxo-2-arylethyl)cyclohexa-2,5-dien-1-one derivatives. This quinone alkylation protocol proceeds under mild reaction conditions at ambient temperature under open air and does not require either an external ligand for the palladium or the use of a base. Additionally, the cyclohexadienone products have been exploited as synthetic precursors for the construction of fused heteroaryl systems.
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Affiliation(s)
- Subba Rao Polimera
- Department of Medicinal Chemistry, BBRC, Syngene, Biocon Park, Bommasandra IV Phase, Jigani Link Road, Bangalore 560009, India.,Department of Chemistry, Bharathidasan University, Palkalaiperur, Thiruchirapalli, Tamil Nadu 620024, India
| | - Murugaiah A M Subbaiah
- Department of Medicinal Chemistry, BBRC, Syngene, Biocon Park, Bommasandra IV Phase, Jigani Link Road, Bangalore 560009, India
| | - Andivelu Ilangovan
- Department of Chemistry, Bharathidasan University, Palkalaiperur, Thiruchirapalli, Tamil Nadu 620024, India
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7
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Wang Y, He Q, Fan R. Facile synthesis of 4-acetoxyindoles via PhI(OAc) 2-mediated dearomatization of 2-alkynylanilines. Org Chem Front 2021. [DOI: 10.1039/d1qo00358e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A simple process for rapid synthesis of 4-aetoxyindoles from readily available 2-alkynylanilines via dearomatization was reported.
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Affiliation(s)
- Yue Wang
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Qiuqin He
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Renhua Fan
- Department of Chemistry
- Fudan University
- Shanghai
- China
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8
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Qiu W, Wang W, Liu Y, Fan R. Synthesis of N-indolated amino acids or peptides from 2-alkynylanilines via a dearomatization process. Org Chem Front 2021. [DOI: 10.1039/d1qo01257f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A process for the rapid synthesis of N-indolated amino acids or peptides from readily available 2-alkynylanilines via dearomatization was reported.
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Affiliation(s)
- Weilian Qiu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Weiyi Wang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Yin Liu
- Department of Breast Surgery, Fudan University Shanghai Cancer Center/Cancer Institute and Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
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9
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Li X, Li L, Wang W, He Q, Fan R. Synthesis of 4,7-Difunctionalized Indoles via Imino Exchange and Sulfinyl Migration. Org Lett 2020; 22:823-826. [PMID: 31971394 DOI: 10.1021/acs.orglett.9b04257] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A process that rapidly assembles 4,7-difunctionalized indoles from 2-alkynycyclohexadienimines, sulfinamides, and nucleophiles (amines or alcohols) was developed. The process involves imino exchange, cascade cyclization/1,4-nucleophilic addition/aromatization, and 1,3-migration of the sulfinyl group. The 7-sulfinyl group is easy to convert into the sulfonyl or the thioether group through a simple oxidation and reduction reaction.
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Affiliation(s)
- Xiaohua Li
- Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
| | - Lei Li
- Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
| | - Weiyi Wang
- Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
| | - Qiuqin He
- Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
| | - Renhua Fan
- Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
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10
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Neto JSS, Zeni G. Recent advances in the synthesis of indoles from alkynes and nitrogen sources. Org Chem Front 2020. [DOI: 10.1039/c9qo01315f] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review highlights ten years of success in the synthesis of indoles using alkynes and nitrogen sources as substrates.
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Affiliation(s)
- José Sebastião Santos Neto
- Laboratório de Síntese
- Reatividade
- Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE
- UFSM
- Santa Maria
| | - Gilson Zeni
- Laboratório de Síntese
- Reatividade
- Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE
- UFSM
- Santa Maria
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11
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Clarke AK, Ho HE, Rossi‐Ashton JA, Taylor RJK, Unsworth WP. Indole Synthesis Using Silver Catalysis. Chem Asian J 2019; 14:1900-1911. [DOI: 10.1002/asia.201900309] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Indexed: 02/06/2023]
Affiliation(s)
| | - Hon E. Ho
- Department of ChemistryUniversity of York York YO10 5DD UK
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12
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Kang H, Torruellas C, Liu J, Kozlowski MC. Total Synthesis of Chaetoglobin A via Catalytic, Atroposelective Oxidative Phenol Coupling. Org Lett 2018; 20:5554-5558. [PMID: 30207731 DOI: 10.1021/acs.orglett.8b02183] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first total synthesis of chaetoglobin A (1), which features a chiral axis between two identical highly oxygenated bicyclic cores, was successfully completed in 12 steps from 2,6-dimethoxytoluene. Vanadium-catalyzed oxidative phenol coupling, as a key step, enabled generation of the axial chirality.
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Affiliation(s)
- Houng Kang
- Department of Chemistry, Roy and Diana Vagelos Laboratories , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Carilyn Torruellas
- U.S. Army Edgewood Chemical Biological Center , RDCB-DRC-P/Building E3400 , Aberdeen Proving Ground , Maryland 21010-5424 , United States
| | - Jinchu Liu
- Department of Process Research and Development , Merck Research Laboratories , Rahway , New Jersey 07065 , United States
| | - Marisa C Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories , University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
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13
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Madhavachary R, Naveen N, Wang Y, Wang Q, Konstantinidou M, Dömling A. β-Carbolinone Analogues from the Ugi Silver Mine. European J Org Chem 2018; 2018:3139-3143. [PMID: 31440115 PMCID: PMC6706090 DOI: 10.1002/ejoc.201800557] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 11/09/2022]
Abstract
Here we describe a facile, tandem synthetic route for β-carbolinones, a class of natural products of high biological significance. Commercially available building blocks yield highly diverse analogues in just two simple steps.
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Affiliation(s)
- Rudrakshula Madhavachary
- Drug Design, University of Groningen, Deusinglaan 1, 9713 AV Groningen, The Netherlands, , http://www.drugdesign.nl/
| | - Naganaboina Naveen
- Drug Design, University of Groningen, Deusinglaan 1, 9713 AV Groningen, The Netherlands, , http://www.drugdesign.nl/
| | - Yuanze Wang
- Drug Design, University of Groningen, Deusinglaan 1, 9713 AV Groningen, The Netherlands, , http://www.drugdesign.nl/
| | - Qian Wang
- Drug Design, University of Groningen, Deusinglaan 1, 9713 AV Groningen, The Netherlands, , http://www.drugdesign.nl/
| | - Markella Konstantinidou
- Drug Design, University of Groningen, Deusinglaan 1, 9713 AV Groningen, The Netherlands, , http://www.drugdesign.nl/
| | - Alexander Dömling
- Drug Design, University of Groningen, Deusinglaan 1, 9713 AV Groningen, The Netherlands, , http://www.drugdesign.nl/
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14
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Chaisan N, Kaewsri W, Thongsornkleeb C, Tummatorn J, Ruchirawat S. PtCl4-catalyzed cyclization of N-acetyl-2-alkynylanilines: A mild and efficient synthesis of N-acetyl-2-substituted indoles. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Wang SE, He Q, Fan R. Iodobenzene-Catalyzed Ortho-Dearomatization and Aromatization-Triggered Rearrangement of 2-Allylanilines: Construction of Indolin-3-ylmethanols with High Diastereoselectivities. Org Lett 2017; 19:6478-6481. [DOI: 10.1021/acs.orglett.7b02986] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shuo-En Wang
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Qiuqin He
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Renhua Fan
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
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16
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Nambu H, Hirota W, Fukumoto M, Tamura T, Yakura T. An Efficient Route to Highly Substituted Indoles via Tetrahydroindol-4(5H
)-one Intermediates Produced by Ring-Opening Cyclization of Spirocyclopropanes with Amines. Chemistry 2017; 23:16799-16805. [DOI: 10.1002/chem.201702622] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Hisanori Nambu
- Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani, Toyama 930-0194 Japan
| | - Wataru Hirota
- Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani, Toyama 930-0194 Japan
| | - Masahiro Fukumoto
- Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani, Toyama 930-0194 Japan
| | - Takafumi Tamura
- Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani, Toyama 930-0194 Japan
| | - Takayuki Yakura
- Graduate School of Medicine and Pharmaceutical Sciences; University of Toyama; Sugitani, Toyama 930-0194 Japan
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17
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Deruer E, Coulibali S, Boukercha S, Canesi S. Carbon–Phosphorus Bond Formation on Anilines Mediated by a Hypervalent Iodine Reagent. J Org Chem 2017; 82:11884-11890. [DOI: 10.1021/acs.joc.7b01595] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Elsa Deruer
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada
| | - Siomenan Coulibali
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada
| | - Saad Boukercha
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada
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18
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Wang W, He Q, Fan R. PhI(OAc) 2-mediated dialkoxylation of 4-aminostyrenes through a dearomatization process under metal-free conditions. Org Chem Front 2017. [DOI: 10.1039/c7qo00545h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A PhI(OAc)2-mediated dialkoxylation of 4-aminostyrenes has been developed to afford 2,3-disubstituted 1,4-dioxane or 1,2-dimethoxyethane derivatives.
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Affiliation(s)
- Weiyi Wang
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Qiuqin He
- Department of Chemistry
- Fudan University
- Shanghai
- China
| | - Renhua Fan
- Department of Chemistry
- Fudan University
- Shanghai
- China
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19
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Karmakar S, Das P, Ray D, Ghosh S, Chattopadhyay SK. Ag(I)-Catalyzed Domino Cyclization–Addition Sequence with Simultaneous Carbonyl and Alkyne Activation as a Route to 2,2′-Disubstituted Bisindolylarylmethanes. Org Lett 2016; 18:5200-5203. [PMID: 27709960 DOI: 10.1021/acs.orglett.6b02321] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Swastik Karmakar
- Department
of Chemistry, Basirhat College, Basirhat 743412, West Bengal India
| | - Prasanta Das
- Department
of Chemistry, Basirhat College, Basirhat 743412, West Bengal India
| | - Debjyoti Ray
- Department
of Chemistry, Basirhat College, Basirhat 743412, West Bengal India
| | - Subhankar Ghosh
- Department
of Chemistry, University of Kalyani, Kalyani 741235, West Bengal India
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20
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Han D, Chen J, He Q, Fan R. Dearomatization-Induced Cycloaddition and Aromatization-Triggered Rearrangement: Synthesis of Vertically Expanded Five-Ring Fused Benzofurans. Org Lett 2016; 18:4690-3. [DOI: 10.1021/acs.orglett.6b02329] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dandan Han
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Jinjin Chen
- Department
of Child Health Care, Shanghai Children’s Hospital Affiliated to Shanghai Jiao Tong University, 1400 Beijing Xi Road, Shanghai, 200040, China
| | - Qiuqin He
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
| | - Renhua Fan
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai, 200433, China
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21
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Coulibali S, Godou T, Canesi S. Use of the Nosyl Group as a Functional Protecting Group in Applications of a Michael/Smiles Tandem Process. Org Lett 2016; 18:4348-51. [DOI: 10.1021/acs.orglett.6b02105] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Siomenan Coulibali
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
| | - Timothé Godou
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
| | - Sylvain Canesi
- Laboratoire de Méthodologie
et Synthèse de Produits Naturels, Université du Québec à Montréal, C.P. 8888, Succ. Centre-Ville, Montréal, H3C 3P8, Québec, Canada
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22
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Abstract
Silver is a less expensive noble metal. Superior alkynophilicity due to π-coordination with the carbon-carbon triple bond makes silver salts ideal catalysts for alkyne-based organic reactions. This review highlights the progress in alkyne chemistry via silver catalysis primarily over the past five years (ca. 2010-2014). The discussion is developed in terms of the bond type formed with the acetylenic carbon (i.e., C-C, C-N, C-O, C-Halo, C-P and C-B). Compared with other coinage metals such as Au and Cu, silver catalysis is frequently observed to be unique. This critical review clearly indicates that silver catalysis provides a significant impetus to the rapid evolution of alkyne-based organic reactions, such as alkynylation, hydrofunctionalization, cycloaddition, cycloisomerization, and cascade reactions.
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Affiliation(s)
- Guichun Fang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China.
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23
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Lee DJ, Yoo EJ. Efficient Synthesis of C–N-Coupled Heterobiaryls by Sequential N–H Functionalization Reactions. Org Lett 2015; 17:1830-3. [DOI: 10.1021/acs.orglett.5b00625] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Dong Jin Lee
- Department
of Chemistry, Kangwon National University, Chuncheon 200-701, Korea
| | - Eun Jeong Yoo
- Department
of Chemistry, Kangwon National University, Chuncheon 200-701, Korea
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Jacob JP, Sithambaresan M, Kunjachan C, Kurup MRP. Crystal structure of 8-[7,8-bis-(4-chloro-benzo-yl)-7H-cyclo-penta-[a]ace-naphthylen-9-yl]naphthalene-1-carb-oxy-lic acid. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2015; 71:38-41. [PMID: 25705445 PMCID: PMC4331862 DOI: 10.1107/s2056989014026334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Accepted: 12/01/2014] [Indexed: 11/18/2022]
Abstract
The title compound packs with a three-dimensional supramolecular architecture via O—H⋯O, C—H⋯O and C—H⋯Cl hydrogen bonds and through C—H⋯π interactions. The title compound, C40H22Cl2O4, was formed by a Michael–Aldol domino reaction sequence, which coupled acenaphthenequinone with 4-chloroacetophenone in the presence of KOH in methanol. The dihedral angles between the central cyclopenta[a]acenaphthylene fused-ring system (r.m.s. deviation = 0.066 Å) and the 4-chlorobenzoyl rings are 62.25 (10) and 70.19 (10)°. The dihedral angle between the central ring system and the naphthoic acid grouping is 62.46 (7)°. This twisting of the pendant rings facilitates the formation of an intramolecular aromatic π–π stacking interaction between the 4-chlorobenzoyl and naphthoic acid rings, with centroid–centroid distances of 3.4533 (16) and 3.5311 (16) Å, and a C—H⋯π interaction between one of the H atoms of the central moiety and the 4-chlorobenzoyl ring with an H⋯π distance of 2.57 Å. In the crystal, carboxylic acid inversion dimers generate R22(8) loops. The dimers are linked by weak C—H⋯O and C—H⋯Cl hydrogen bonds and C—H⋯π interactions, generating a three-dimensional architecture.
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Affiliation(s)
- Jomon P Jacob
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India
| | - M Sithambaresan
- Department of Chemistry, Faculty of Science, Eastern University, Chenkalady, Sri Lanka
| | - Christy Kunjachan
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India
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Han D, Li Z, Fan R. Oxidative Nucleophilic Cyclization of 2-Alkynylanilines with Thiophenols under Metal-Free Conditions. Org Lett 2014; 16:6508-11. [DOI: 10.1021/ol5034139] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dandan Han
- Department of Chemistry, Fudan University, 220 Handan
Road, Shanghai, 200433, China
| | - Zhiming Li
- Department of Chemistry, Fudan University, 220 Handan
Road, Shanghai, 200433, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 220 Handan
Road, Shanghai, 200433, China
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Zhang L, Wang H, Yang B, Fan R. Imino exchange reaction in a dearomatization strategy: synthesis of N-acyl diarylamines and phenothiazines from two anilines. Org Chem Front 2014. [DOI: 10.1039/c4qo00201f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dearomatization strategy of anilines involving an imino exchange as the key step was developed to prepare N-acyl-diarylamines and phenothiazines.
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Affiliation(s)
- Li Zhang
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
| | - Huiqing Wang
- Department of Urology
- Changhai Hospital
- Shanghai 200433, China
| | - Bo Yang
- Department of Urology
- Changhai Hospital
- Shanghai 200433, China
| | - Renhua Fan
- Department of Chemistry
- Fudan University
- Shanghai 200433, China
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