1
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Abe M, Takano M, Mizukami A, Kimachi T, Inamoto K. Gold-Catalyzed Heteroannulation of Anthranilic Acids with Alkynes: Synthesis of 3,1-Benzoxazin-4-ones. J Org Chem 2024; 89:12651-12657. [PMID: 39141818 DOI: 10.1021/acs.joc.4c01602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2024]
Abstract
We demonstrated a rapid and facile approach for the synthesis of various 3,1-benzoxazin-4-ones via a gold-catalyzed heteroannulation of readily available nonprotected anthranilic acids and simple aryl alkynes. Our preliminary mechanistic investigation indicated that the double incorporation of alkynes into anthranilic acids occurs through the formation of bisenamine intermediates.
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Affiliation(s)
- Masahiro Abe
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Mai Takano
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Akiho Mizukami
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Tetsutaro Kimachi
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Kiyofumi Inamoto
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
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2
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Tong Z, Smith PJ, Pickford HD, Christensen KE, Anderson EA. Gold-Catalyzed Cyclization of Yndiamides with Isoxazoles via α-Imino Gold Fischer Carbenes. Chemistry 2023; 29:e202302821. [PMID: 37767940 PMCID: PMC10947298 DOI: 10.1002/chem.202302821] [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: 08/29/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 09/29/2023]
Abstract
Gold catalysis is an important method for alkyne functionalization. Here we report the gold-catalyzed formal [3+2] aminative cyclization of yndiamides and isoxazoles in a direct synthesis of polysubstituted diaminopyrroles, which are important motifs in drug discovery. Key to this process is the formation, and subsequent cyclization, of an α-imino gold Fischer carbene, which represents a new type of gold carbene intermediate. The reaction proceeds rapidly under mild conditions, with high regioselectivity being achieved by introducing a subtle steric bias between the nitrogen substituents on the yndiamide. DFT calculations revealed that the key to this regioselectivity was the interconversion of isomeric gold keteniminiun ions via a low-barrier π-complex transition state, which establishes a Curtin-Hammett scenario for isoxazole addition. By using benzisoxazoles as substrates, the reaction outcome could be switched to a formal [5+2] cyclization, leading to 1,4-oxazepines.
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Affiliation(s)
- Zixuan Tong
- Chemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | - Philip J. Smith
- Chemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | - Helena D. Pickford
- Chemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | - Kirsten E. Christensen
- Chemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
| | - Edward A. Anderson
- Chemistry Research LaboratoryDepartment of ChemistryUniversity of Oxford12 Mansfield RoadOxfordOX1 3TAUK
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3
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Sun Q, Hüßler C, Kahle J, Mackenroth AV, Rudolph M, Krämer P, Oeser T, Hashmi ASK. Cascade Reactions of Aryl-Substituted Terminal Alkynes Involving in Situ-Generated α-Imino Gold Carbenes. Angew Chem Int Ed Engl 2023:e202313738. [PMID: 37882411 DOI: 10.1002/anie.202313738] [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: 09/14/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 10/27/2023]
Abstract
An efficient, highly selective and divergent synthetic method to construct 2-substituted indoles and aryl-annulated carbazoles via the intermolecular generation of α-imino gold carbenes from terminal alkynes or diynes in combination with sulfilimines is disclosed. Importantly, the tandem reaction is proposed to proceed through an intermolecular gold carbene generation/C-H annulation followed by the activation of a second alkyne leading to 6-endo-dig cyclization, which is significantly different from previous dual activation or 1,6-carbene shift approaches for diyne systems. In the case of ortho-alkynylaniline as starting material, an unexpected regioselective formation of the indole moiety via the intermolecular path, instead of intramolecular hydroamination was discovered. This reactivity paved the way for a one-pot synthesis of the 11H-indolo [3,2-c] quinoline scaffold by exploiting the formed amino indole for a subsequent Pictet-Spengler reaction with aldehydes. The photophysical properties of the carbazoles indicated good violet-blue emission with quantum yields up to 40 %.
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Affiliation(s)
- Qiaoying Sun
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Christopher Hüßler
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Justin Kahle
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Alexandra V Mackenroth
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Matthias Rudolph
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Petra Krämer
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Thomas Oeser
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - A Stephen K Hashmi
- Institut für Organische Chemie, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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4
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Badeji AA, Liu Y, Oladipo SD, Osinubi AD. Computational insights into the mechanisms and origins of switchable selectivity in gold(i)-catalyzed annulation of ynamides with isoxazoles via 6π-electrocyclizations of azaheptatrienyl cations. RSC Adv 2023; 13:18025-18037. [PMID: 37323448 PMCID: PMC10265590 DOI: 10.1039/d3ra02839a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 06/05/2023] [Indexed: 06/17/2023] Open
Abstract
Electrocyclizations of acyclic conjugated π-motifs have emerged as a versatile and effective strategy for accessing various ring systems with excellent functional group tolerability and controllable selectivity. Typically, the realization of 6π-electrocyclization of heptatrienyl cations to afford seven-membered motif has proven difficult due to the high-energy state of the cyclizing seven-membered intermediate. Instead, it undergoes the Nazarov cyclization, affording a five-membered pyrrole product. However, the incorporation of a Au(i)-catalyst, a nitrogen atom and tosylamide group in the heptatrienyl cations unexpectedly circumvented the aforementioned high energy state to afford a seven-membered azepine product via 6π-electrocyclization in the annulation of 3-en-1-ynamides with isoxazoles. Therefore, extensive computational studies were carried out to investigate the mechanism of Au(i)-catalyzed [4+3] annulation of 3-en-1-ynamides with dimethylisoxazoles to produce a seven-membered 4H-azepine via the 6π-electrocyclization of azaheptatrienyl cations. Computational results showed that after the formation of the key α-imino gold carbene intermediate, the annulation of 3-en-1-ynamides with dimethylisoxazole occurs via the unusual 6π-electrocyclization to afford a seven-membered 4H-azepine exclusively. However, the annulation of 3-cyclohexen-1-ynamides with dimethylisoxazole occurs via the commonly proposed aza-Nazarov cyclization pathway to majorly generate five-membered pyrrole derivatives. The results from the DFT predictive analysis revealed that the key factors responsible for the different chemo-, and regio-selectivities observed are the cooperating effect of the tosylamide group on C1, the uninterrupted π-conjugation pattern of the α-imino gold(i) carbene and the substitution pattern at the cyclization termini. The Au(i)-catalyst is believed to assist in the stabilization of the azaheptatrienyl cation.
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Affiliation(s)
| | - Yuan Liu
- School of Chemistry and Chemical Engineering, Nantong University 9 Seyuan Road Nantong 226019 China
| | - Segun D Oladipo
- Department of Chemical Sciences, Olabisi Onabanjo University 2002 Ago-Iwoye Nigeria
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5
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Chen Y, Fang DM, Huang HS, Nie XK, Zhang SQ, Cui X, Tang Z, Li GX. Synthesis of Sulfilimines via Selective S-C Bond Formation in Water. Org Lett 2023; 25:2134-2138. [PMID: 36939573 DOI: 10.1021/acs.orglett.3c00604] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
Sulfilimines are valuable compounds both in organic synthesis and in pharmaceuticals. Here we developed a mild and simplified method for preparation of sulfilimines via selective S-C bond formation rather than traditional S-N bond formation. The method is both attractive and useful for the following reasons: it uses a readily available alkylation reagent such alkyl bromide or alkyl iodide, it uses water as solvent, it is easy to perform, and it is convenient for late-stage diversification of drugs.
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Affiliation(s)
- Yue Chen
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China.,University of Chinese Academy of Sciences, Beijing 10049, P.R. China
| | - Dong-Mei Fang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - He-Sen Huang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Xiao-Kang Nie
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Shi-Qi Zhang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Xin Cui
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Zhuo Tang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Guang-Xun Li
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
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6
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Sancheti SP, Mondal DJ, Patil NT. Fluorination of α-Imino Gold Carbenes to Access C 3-Fluorinated Aza-Heterocycles. ACS Catal 2023. [DOI: 10.1021/acscatal.3c00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Shashank P. Sancheti
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
| | - Dibya Jyoti Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
| | - Nitin T. Patil
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
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7
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Rodphon W, Jaithum K, Linkhum S, Thongsornkleeb C, Tummatorn J, Ruchirawat S. Synthesis of Naphtho[2,3- d]oxazoles via Ag(I) Acid-Mediated Oxazole-Benzannulation of ortho-Alkynylamidoarylketones. J Org Chem 2023. [PMID: 35786915 DOI: 10.1021/acs.joc.2c00940] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cascade oxazole-benzannulation for the synthesis of naphtho[2,3-d]oxazoles has been developed employing ortho-alkynylamidoarylketones as substrates. This procedure provides the advantage of preparing a wide variety of substituents on naphtho[2,3-d]oxazole structures. In addition, o-alkynylamidoarylketones could be prepared from easily accessible and a wide variety of commercially available starting materials. Therefore, this method is a judicious choice of strategy to synthesize naphtho[2,3-d]oxazoles with a great variety of substituents. In this work, 27 examples were demonstrated to provide the desired products in moderate to good yields.
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Affiliation(s)
- Warabhorn Rodphon
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Kanokwan Jaithum
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Sutida Linkhum
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Charnsak Thongsornkleeb
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Jumreang Tummatorn
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Somsak Ruchirawat
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
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8
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Song L, Tian X, Farshadfar K, Shiri F, Rominger F, Ariafard A, Hashmi ASK. An unexpected synthesis of azepinone derivatives through a metal-free photochemical cascade reaction. Nat Commun 2023; 14:831. [PMID: 36788212 PMCID: PMC9929248 DOI: 10.1038/s41467-023-36190-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 01/17/2023] [Indexed: 02/16/2023] Open
Abstract
Azepinone derivatives are privileged in organic synthesis and pharmaceuticals. Synthetic approaches to these frameworks are limited to complex substrates, strong bases, high power UV light or noble metal catalysis. We herein report a mild synthesis of azepinone derivatives by a photochemical generation of 2-aryloxyaryl nitrene, [2 + 1] annulation, ring expansion/water addition cascade reaction without using any metal catalyst. Among the different nitrene precursors tested, 2-aryloxyaryl azides performed best under blue light irradiation and Brønsted acid catalysis. The reaction scope is broad and the obtained products underwent divergent transformations to afford other related compounds. A computational study suggests a pathway involving a step-wise aziridine formation, followed by a ring-expansion to the seven-membered heterocycle. Finally, water is added in a regio-selective manner, this is accelerated by the added TsOH.
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Affiliation(s)
- Lina Song
- grid.7700.00000 0001 2190 4373Institut für Organische Chemie, Heidelberg University, Heidelberg, Germany
| | - Xianhai Tian
- Institut für Organische Chemie, Heidelberg University, Heidelberg, Germany.
| | - Kaveh Farshadfar
- grid.411463.50000 0001 0706 2472Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran, Iran ,grid.5373.20000000108389418Research Group of Computational Chemistry, Department of Chemistry and Materials Science, Aalto University, Aalto, Finland
| | - Farshad Shiri
- grid.411463.50000 0001 0706 2472Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran, Iran
| | - Frank Rominger
- grid.7700.00000 0001 2190 4373Institut für Organische Chemie, Heidelberg University, Heidelberg, Germany
| | - Alireza Ariafard
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran, Iran. .,School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia.
| | - A. Stephen K. Hashmi
- grid.7700.00000 0001 2190 4373Institut für Organische Chemie, Heidelberg University, Heidelberg, Germany ,grid.412125.10000 0001 0619 1117Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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9
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Liu J, Jia X, Huang L. Sulfilimines as Transformable and Retainable Directing Groups in Rhodium-Catalyzed ortho-C-H Bond Functionalization. Org Lett 2022; 24:6772-6776. [PMID: 36098745 DOI: 10.1021/acs.orglett.2c02630] [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
Shown herein is the first time that the sulfilimine is utilized as a directing group for Rh(III)-catalyzed C-H activation/annulation with intermolecular and intramolecular alkyne compounds. Sulfilimine serves as a transformable directing group, an internal oxidant, in the annulation with an alkyne moiety via N-S bond cleavage. Notably, the retention of sulfilimine as a directing group is also achieved in the Rh(III)-catalyzed ortho-alkynylation with alkyne bromides.
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Affiliation(s)
- Jiechun Liu
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Xiaoyan Jia
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Liangbin Huang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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10
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Abe M, Kawamoto M, Inoue M, Kimachi T, Inamoto K. Gold(I)-Catalyzed Heteroannulation of Salicylic Amides with Alkynes: Synthesis of 1,3-Benzoxazin-4-one Derivatives. Org Lett 2022; 24:5684-5687. [PMID: 35904567 DOI: 10.1021/acs.orglett.2c02066] [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
Gold(I)-catalyzed heteroannulation affords the efficient and straightforward construction of heterocyclic compounds. Herein, we developed a gold(I)-catalyzed heteroannulation of salicylic amides with alkynes producing a broad range of 1,3-benzoxazin-4-ones. The utility of this protocol was highlighted by synthesizing variously substituted benzoxazinones containing quaternary carbon centers, showing a high functional group tolerance and excellent atom economy of the thus introduced reaction course.
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Affiliation(s)
- Masahiro Abe
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Megumu Kawamoto
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Mayu Inoue
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Tetsutaro Kimachi
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Kiyofumi Inamoto
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
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11
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Gaykar RN, Deswal S, Guin A, Bhattacharjee S, Biju AT. Synthesis of Trisubstituted Oxazoles via Aryne Induced [2,3] Sigmatropic Rearrangement-Annulation Cascade. Org Lett 2022; 24:4145-4150. [PMID: 35666528 DOI: 10.1021/acs.orglett.2c01379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A transition-metal-free, [2,3] sigmatropic rearrangement-annulation cascade of 2-substituted thio/amino acetonitriles with arynes allowing the synthesis of 2,4,5-trisubstituted oxazoles under mild conditions has been demonstrated. The key sulfur/nitrogen ylides were generated by the initial S/N arylation followed by proton transfer, which was followed by the selective [2,3] sigmatropic rearrangement involving the -CN moiety and a subsequent annulation to afford the desired products in reasonable yields.
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Affiliation(s)
- Rahul N Gaykar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Shiksha Deswal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Avishek Guin
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Subrata Bhattacharjee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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12
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Fang R, Liu K, Kirillov AM, Yang L. DFT Rationalization of Gold(I)-Catalyzed Couplings between Alkynyl Thioether and Nitrenoid Derivatives: Mechanism, Selectivity Patterns, and Effects of Substituents. J Org Chem 2022; 87:7193-7201. [PMID: 35579210 DOI: 10.1021/acs.joc.2c00407] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present work focuses on a theoretical investigation of mechanistic features, chemoselectivity, regioselectivity, and effect of substituents in the gold-catalyzed reactions of alkynyl thioethers and isoxazoles. The DFT calculations reveal that the nucleophilic attack of isoxazole to a β-position of catalyst-bound ynamide forms a vinyl intermediate. This undergoes cleavage of the N-O isoxazole bond and isomerizes to form an α-imino α'-sulfenyl gold carbene complex with stabilization of the Au-S interaction. For 3,5-dimethylisoxazole, the reaction follows a formal [3 + 2] cycloaddition pathway and a 1,3-H migration to give the pyrrole products. Replacement of 3,5-dimethylisoxazole by 3,5-dimethyl-4-phenylisoxazole leads to the formation of deacylative annulation products and desulfenylated 3-acylated pyrroles. Reactions with 4-methyl-3,5-diphenylisoxazoles induce the formation of N-acylated pyrroles and desulfenylated 3-acylated pyrroles. For the minor pathway, the α-addition and 1,2-S migration result in sulfur-substituted β-keto enamide derivatives. In addition, the unique features of regio- and chemoselectivity were rationalized by the distortion and interaction analysis. Apart from fully rationalizing the experimental results, the theoretical DFT data give an important support for comprehending related types of reaction mechanisms.
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Affiliation(s)
- Ran Fang
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Kunyang Liu
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Alexander M Kirillov
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon 1049-001, Portugal
| | - Lizi Yang
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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13
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Brambilla E, Abbiati G, Caselli A, Pirovano V, Rossi E. Coinage metal carbenes in heterocyclic synthesis via formation of new carbon-heteroatom bonds. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Weng CY, Zhu GY, Zhu BH, Qian PC, Zhu XQ, Zhou JM, Ye LW. Copper-catalyzed B−H bond insertion reaction of azide-ynamide with borane adducts via α-imino copper carbenes. Org Chem Front 2022. [DOI: 10.1039/d2qo00457g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new copper-catalyzed B−H bond insertion reaction between azide-ynamides and borane adducts has been developed, which represents the first B−H bond insertion into α-imino metal carbenes. This protocol enables the...
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15
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Xie X, Sun J. [4+3]-Cycloaddition Reaction of Sulfilimines with Cyclobutenones: Access to Benzazepinones. Org Lett 2021; 23:8921-8925. [PMID: 34723560 DOI: 10.1021/acs.orglett.1c03413] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A catalyst-free [4+3]-cycloaddition reaction of N-aryl sulfilimines with cyclobutenones is described, which provides a straightforward protocol for synthesizing 1,5-dihydro-2H-benzo[b]azepin-2-ones under mild reaction conditions. This reaction features a broad substrate scope and good functional group tolerance and does not require catalysts or additives. Moreover, using N-pyridinyl sulfilimine as the substrate, a series of pyridoazepinones have also been prepared.
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Affiliation(s)
- Xiaozhou Xie
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
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16
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Davies PW. Gold-Catalyzed Annulations with Nucleophilic Nitrenoids Enabled by Heteroatom-Substituted Alkynes. CHEM REC 2021; 21:3964-3977. [PMID: 34708496 DOI: 10.1002/tcr.202100205] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 11/07/2022]
Abstract
The combination of a nucleophilic nitrene equivalent, a triple bond and a π-acid catalyst has underpinned numerous efficient transformations for the preparation of azacycles. This personal account details our efforts in developing an annulation strategy. Adding a nucleophilic nitrenoid to an activated alkyne can generate carbenoid character that is then quenched by a cyclisation onto the nitrenoid substituent. The use and development of N-acyl and N-heterocyclic pyridinium-N-aminides as 1,3-N,O and 1,3-N,N-dipole equivalents is discussed in the context of oxazole and heterocycle-fused imidazole formation, respectively. The resulting processes are highly efficient, practically straightforward, and tolerate considerable structural and functional group variation. Our use of heteroatom-substituted alkynes as enabling tools for reaction discovery is discussed. The reactivity accessed from the strong donor-like properties of ynamides is complemented by that obtained from alkynyl thioethers, which are emerging as interesting substrates for π-acid catalysis.
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Affiliation(s)
- Paul W Davies
- School of Chemistry, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
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17
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Shcherbakov NV, Dar'in DV, Kukushkin VY, Dubovtsev AY. Gold-Catalyzed Nitrene Transfer from Benzofuroxans to N-Allylynamides: Synthesis of 3-Azabicyclo[3.1.0]hexanes. J Org Chem 2021; 86:12964-12972. [PMID: 34472847 DOI: 10.1021/acs.joc.1c01654] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The gold-catalyzed reaction between benzofuroxans, functioning as nitrene transfer reagents, and N-allylynamides leads to 3-azabicyclo[3.1.0]hexan-2-imines. This highly selective annulation proceeds smoothly under mild conditions (5 mol % Ph3PAuNTf2, PhCl, 60 °C) and exhibits high functional group tolerance (21 examples, ≤96% yields). The obtained cyclopropanated products represent a useful synthetic platform with an easily modulated substitution pattern as illustrated by their postmodifications. Intramolecular cyclopropanation of gold α-imino carbene intermediates is suggested as a key step of the catalytic cycle.
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Affiliation(s)
- Nikolay V Shcherbakov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
| | - Dmitry V Dar'in
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
| | - Vadim Yu Kukushkin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
| | - Alexey Yu Dubovtsev
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
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18
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Suárez‐Rodríguez T, Suárez‐Sobrino ÁL, Ballesteros A. Gold(I)-Catalyzed Intermolecular Formal [4+2] Cycloaddition of O-Aryl Ynol Ethers and Enol Ethers: Synthesis of Chromene Derivatives. Chemistry 2021; 27:13079-13084. [PMID: 34278626 PMCID: PMC8518403 DOI: 10.1002/chem.202102534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Indexed: 11/06/2022]
Abstract
Gold(I)-catalyzed formal [4+2] cycloaddition of O-aryl ynol ethers 1 and enol ethers 2 is described. This intermolecular reaction between two electron-rich unsaturated systems takes place, under mild conditions, in the presence of 5 mol% [IPrAu(CH3 CN)]SbF6 as catalyst giving chromene derivatives with good yields. The cycloaddition is completely regio- and stereoselective, as well as versatile for both reactives. Silyl enol ethers can also react in the same way and under the same reaction conditions with quantitative yields. A plausible mechanism through a selective addition of the enol ether to the alkyne gold activated complex followed by an intramolecular aromatic electrophilic substitution is proposed. Several experimental results support the presence of a cationic oxonium intermediate prior to the aromatic substitution. The reaction represents a new entry to the chromene core.
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Affiliation(s)
- Tatiana Suárez‐Rodríguez
- Departamento de Química Orgánica e InorgánicaInstituto de Química Organometálica “Enrique Moles”Universidad de OviedoJulián ClaveríaOviedo, 833006-OviedoSpain
| | - Ángel L. Suárez‐Sobrino
- Departamento de Química Orgánica e InorgánicaInstituto de Química Organometálica “Enrique Moles”Universidad de OviedoJulián ClaveríaOviedo, 833006-OviedoSpain
| | - Alfredo Ballesteros
- Departamento de Química Orgánica e InorgánicaInstituto de Química Organometálica “Enrique Moles”Universidad de OviedoJulián ClaveríaOviedo, 833006-OviedoSpain
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19
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Shandilya S, Protim Gogoi M, Dutta S, Sahoo AK. Gold-Catalyzed Transformation of Ynamides. CHEM REC 2021; 21:4123-4149. [PMID: 34432929 DOI: 10.1002/tcr.202100159] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/27/2021] [Indexed: 11/07/2022]
Abstract
Ynamide, a unique species with inherited polarization of nitrogen lone pair electron to triple bond, has been largely used for the developement of novel synthetic methods and the construction of unusual N-bearing heterocycles. The reaction versatility of ynamide on umpolung reactivity, radical reactions and asymmetric synthesis have been recently reviewed. This review provides an overall scenic view into the gold catalyzed transformation of ynamides. The ynamides reactivity towards nitrogen-transfer reagents, such as azides, nitrogen ylides, isoxazoles, and anthranils; oxygen atom-transfer reagents, like nitrones, sulfoxides, and pyridine N-oxides; and carbon nucleophiles under gold catalysis are herein uncovered. The scope as well the mechanistic insights of each reaction is also briefed.
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Affiliation(s)
| | | | - Shubham Dutta
- School of Chemistry, University of Hyderabad, 500046, Hyderabad, India
| | - Akhila K Sahoo
- School of Chemistry, University of Hyderabad, 500046, Hyderabad, India
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20
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Affiliation(s)
- Qun Li
- College of Food and Biology, Changchun Polytechnic, Changchun, China
| | - Liguo Han
- College of Food and Biology, Changchun Polytechnic, Changchun, China
| | - Li Zhao
- Nursing College of Chifeng University, Chifeng, Inner Mongolia, China
| | - Yue Hou
- Changchun University of Science and Technology, Changchun, China
| | - Ranjit Sharma
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, India
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21
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Simm PE, Sekar P, Richardson J, Davies PW. Gold(I)-Catalyzed Synthesis of 3-Sulfenyl Pyrroles and Indoles by a Regioselective Annulation of Alkynyl Thioethers. ACS Catal 2021; 11:6357-6362. [PMID: 34306808 PMCID: PMC8291588 DOI: 10.1021/acscatal.1c01457] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/03/2021] [Indexed: 01/01/2023]
Abstract
![]()
The combination of
nucleophilic nitrenoids and π-acid catalysis
has emerged as a powerful tool in heterocycle synthesis. Accessing
more varied heterocycle-substitution patterns by maintaining the same
reaction pathways across different alkynes remains a challenge. Here
we show that Au(I) catalysis of isoxazole-based nitrenoids with alkynyl
thioethers provides controlled access to (3 + 2) annulation by a regioselective
addition β to the sulfenyl group. The reaction with isoxazole-containing
nitrenoids delivers sulfenylated pyrroles and indoles as single regioisomers
bearing useful functional groups and structural variety.
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Affiliation(s)
- Peter E. Simm
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Prakash Sekar
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | | | - Paul W. Davies
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
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22
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Suárez-Rodríguez T, Suárez-Sobrino ÁL, Ballesteros A. Gold(I)-Catalyzed [8+2]-Cycloaddition of 8-Aryl-8-azaheptafulvenes with Allenamides and Ynamides: Regioselective Synthesis of Dihydrocycloheptapyrrole Derivatives. Chemistry 2021; 27:7154-7159. [PMID: 33567146 DOI: 10.1002/chem.202005348] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Indexed: 01/01/2023]
Abstract
Gold(I)-catalyzed higher-order [8+2] cycloadditions of 8-aryl-8-azaheptafulvenes 1 with allenamides 2 and ynamides 3 were studied. 1,8-Dihydrocycloheptapyrroles 4 were achieved by a regioselective [8+2] cycloaddition of azaheptafulvenes 1 and allenamides 2 in the presence of (2,4-ditBuC6 H3 O)3 PAuNTf2 as catalyst. Besides, ynamides 3 and 8-aryl-8-azaheptafulvenes 1, undergo a regioselective [8+2] cycloaddition, to give 2-amido-1,4-dihydrocycloheptapyrroles 7 in the presence of JohnPhosAuNTf2 as catalyst. Both reactions take place with good yields and with a variety of substituents. A plausible mechanism hypothesis suggests a nucleophilic attack of the 8-azaheptafulvene to the gold activated electron rich allene or alkyne moieties of the allenamide and ynamide, respectively.
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Affiliation(s)
- Tatiana Suárez-Rodríguez
- Departamento de Química Orgánica e Inorgánica, Instituto de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
| | - Ángel L Suárez-Sobrino
- Departamento de Química Orgánica e Inorgánica, Instituto de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
| | - Alfredo Ballesteros
- Departamento de Química Orgánica e Inorgánica, Instituto de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
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23
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Zhang J, Li Y, Zhang C, Wang XN, Chang J. Metal-Free [3+2] Annulation of Ynamides with Anthranils to Construct 2-Aminoindoles. Org Lett 2021; 23:2029-2035. [PMID: 33645992 DOI: 10.1021/acs.orglett.1c00158] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel metal-free [3+2] annulation of ynamides with anthranils provides a facile, flexible, environmentally friendly, and atom-economical route to 2-aminoindoles. This synthetic process proceeds with efficiency, excellent regioselectivity, and wide functional group tolerance under mild conditions. Moreover, the obtained 2-aminoindole products represent a multifunctional platform for the construction of various 2-aminoindolyl frameworks.
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Affiliation(s)
- Jingyi Zhang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Ying Li
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Chaofeng Zhang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Xiao-Na Wang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Junbiao Chang
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
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24
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Hu YC, Zhao Y, Wan B, Chen QA. Reactivity of ynamides in catalytic intermolecular annulations. Chem Soc Rev 2021; 50:2582-2625. [PMID: 33367365 DOI: 10.1039/d0cs00283f] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Ynamides are unique alkynes with a carbon-carbon triple bond directly attached to the nitrogen atom bearing an electron-withdrawing group. The alkyne is strongly polarized by the electron-donating nitrogen atom, but its high reactivity can be finely tempered by the electron-withdrawing group. Accordingly, ynamides are endowed with both nucleophilic and electrophilic properties and their chemistry has been an active research field. The catalytic intermolecular annulations of ynamides, featuring divergent assembly of structurally important amino-heterocycles in a regioselective manner, have gained much attention over the past decade. This review aims to provide a comprehensive summary of the advances achieved in this area involving transition metal and acid catalysis. Moreover, the intermolecular annulations of ynamide analogs including ynol ethers and thioalkynes are also discussed, which can provide insights into the reactivity difference caused by the heteroatoms.
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Affiliation(s)
- Yan-Cheng Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
| | - Yingying Zhao
- School of Chemistry and Chemical Engineering, Liaoning Normal University, 850 Huanghe Road, Dalian 116029, China
| | - Boshun Wan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
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25
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Ma RJ, Xu WK, Sun JT, Chen L, Si CM, Wei BG. Synthesis of dihydro-[1,3]oxazino[4,3-a] isoindole and tetrahydroisoquinoline through Cu(OTf)2-catalyzed reactions of N-acyliminium ions with ynamides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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Zhao MN, Ning GW, Yang DS, Fan MJ, Zhang S, Gao P, Zhao LF. Iron-Catalyzed Cycloaddition of Amides and 2,3-Diaryl-2 H-azirines To Access Oxazoles via C-N Bond Cleavage. J Org Chem 2021; 86:2957-2964. [PMID: 33443426 DOI: 10.1021/acs.joc.0c02843] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A novel and efficient iron-catalyzed cycloaddition reaction using readily available 2,3-diaryl-2H-azirines and primary amides is reported. A wide range of trisubstituted oxazoles could be achieved in good yields with good functional group compatibility. In this transformation, two C-N bonds were cleaed and new C-N and C-O bonds were formed.
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Affiliation(s)
- Mi-Na Zhao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Gui-Wan Ning
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - De-Suo Yang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Ming-Jin Fan
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Sheng Zhang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Peng Gao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Li-Fang Zhao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
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27
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Song L, Tian X, Han C, Amanpur M, Rominger F, Hashmi ASK. Catalyst-free synthesis of oxazol-2(3 H)-ones from sulfilimines and diazo compounds through a tandem rearrangement/aziridination/ring-expansion reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo00473e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Oxazol-2(3H)-ones play a significant role in the fields of organic synthesis and drug development.
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Affiliation(s)
- Lina Song
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Xianhai Tian
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Chunyu Han
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Mehran Amanpur
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Frank Rominger
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - A. Stephen K. Hashmi
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
- Chemistry Department
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28
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Zimin DP, Dar’in DV, Kukushkin VY, Dubovtsev AY. Oxygen Atom Transfer as Key To Reverse Regioselectivity in the Gold(I)-Catalyzed Generation of Aminooxazoles from Ynamides. J Org Chem 2020; 86:1748-1757. [DOI: 10.1021/acs.joc.0c02584] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dmitry P. Zimin
- Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
| | - Dmitry V. Dar’in
- Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
| | - Vadim Yu. Kukushkin
- Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
- South Ural State University, 76, Lenin Av., Chelyabinsk 454080, Russian Federation
| | - Alexey Yu. Dubovtsev
- Saint Petersburg State University, Universitetskaya Nab. 7/9, 199034 Saint Petersburg, Russian Federation
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29
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Campeau D, León Rayo DF, Mansour A, Muratov K, Gagosz F. Gold-Catalyzed Reactions of Specially Activated Alkynes, Allenes, and Alkenes. Chem Rev 2020; 121:8756-8867. [DOI: 10.1021/acs.chemrev.0c00788] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dominic Campeau
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - David F. León Rayo
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Ali Mansour
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Karim Muratov
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
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30
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Er(OTf)3-catalyzed approach to 3-alkenylindoles through regioselective addition of ynamides and indoles. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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31
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Han XL, Nie XD, Chen ZD, Si CM, Wei BG, Lin GQ. Synthesis of a 3,4-Dihydro-1,3-oxazin-2-ones Skeleton via an Intermolecular [4 + 2] Process of N-Acyliminium Ions with Ynamides/Terminal Alkynes. J Org Chem 2020; 85:13567-13578. [DOI: 10.1021/acs.joc.0c01692] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xiao-Li Han
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Xiao-Di Nie
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Zhao-Dan Chen
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Chang-Mei Si
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Bang-Guo Wei
- Institutes of Biomedical Sciences and School of Pharmacy, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Guo-Qiang Lin
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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32
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Liu X, Wang Z, Zhai T, Luo C, Zhang Y, Chen Y, Deng C, Liu R, Ye L. Copper‐Catalyzed Azide–Ynamide Cyclization to Generate α‐Imino Copper Carbenes: Divergent and Enantioselective Access to Polycyclic N‐Heterocycles. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007206] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xin Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Ze‐Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Tong‐Yi Zhai
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Chen Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Yi‐Ping Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Yang‐Bo Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 China
| | - Rai‐Shung Liu
- Department of Chemistry National Tsing-Hua University Hsinchu Taiwan 30013 Republic of China
| | - Long‐Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory of Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China
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33
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Liu X, Wang ZS, Zhai TY, Luo C, Zhang YP, Chen YB, Deng C, Liu RS, Ye LW. Copper-Catalyzed Azide-Ynamide Cyclization to Generate α-Imino Copper Carbenes: Divergent and Enantioselective Access to Polycyclic N-Heterocycles. Angew Chem Int Ed Engl 2020; 59:17984-17990. [PMID: 32621338 DOI: 10.1002/anie.202007206] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/11/2020] [Indexed: 01/23/2023]
Abstract
Here an efficient copper-catalyzed cascade cyclization of azide-ynamides via α-imino copper carbene intermediates is reported, representing the first generation of α-imino copper carbenes from alkynes. This protocol enables the practical and divergent synthesis of an array of polycyclic N-heterocycles in generally good to excellent yields with broad substrate scope and excellent diastereoselectivities. Moreover, an asymmetric azide-ynamide cyclization has been achieved with high enantioselectivities (up to 98:2 e.r.) by employing BOX-Cu complexes as chiral catalysts. Thus, this protocol constitutes the first example of an asymmetric azide-alkyne cyclization. The proposed mechanistic rationale for this cascade cyclization is further supported by theoretical calculations.
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Affiliation(s)
- Xin Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Ze-Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Tong-Yi Zhai
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chen Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yi-Ping Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yang-Bo Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, 30013, Republic of China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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34
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Ye LW, Zhu XQ, Sahani RL, Xu Y, Qian PC, Liu RS. Nitrene Transfer and Carbene Transfer in Gold Catalysis. Chem Rev 2020; 121:9039-9112. [PMID: 32786423 DOI: 10.1021/acs.chemrev.0c00348] [Citation(s) in RCA: 173] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalytic transformations involving metal carbenes are considered one of the most important aspects of homogeneous transition metal catalysis. Recently, gold-catalyzed generation of gold carbenes from readily available alkynes represents a significant advance in metal carbene chemistry. This Review summarizes the advances in the gold-catalyzed nitrene-transfer reactions of alkynes with nitrogen-transfer reagents, such as azides, nitrogen ylides, isoxazoles, and anthranils, and gold-catalyzed carbene-transfer reactions, involving oxygen atom-transfer reactions of alkynes with nitro compounds, nitrones, sulfoxides, and pyridine N-oxides, through the presumable α-imino gold carbene and α-oxo gold carbene intermediates, respectively. Gold-catalyzed processes are reviewed by highlighting their product diversity, selectivity, and applicability, and the mechanistic rationale is presented where possible.
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Affiliation(s)
- Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Xin-Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Rajkumar Lalji Sahani
- Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, Republic of China
| | - Yin Xu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Peng-Cheng Qian
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, Republic of China
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35
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Witzel S, Holmsen MSM, Rudolph M, Dietl MC, Øien-Ødegaard S, Rominger F, Tilset M, Hashmi ASK. Simple Mercury-Free Synthesis and Characterization of Symmetric and Unsymmetric Mono- and Dialkynyl (tpy)Au(III) Complexes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00364] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Sina Witzel
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
- Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Marte S. M. Holmsen
- Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Matthias Rudolph
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Martin C. Dietl
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Sigurd Øien-Ødegaard
- Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Frank Rominger
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Mats Tilset
- Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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36
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Tian X, Song L, Hashmi ASK. Synthesis of Carbazoles and Related Heterocycles from Sulfilimines by Intramolecular C-H Aminations. Angew Chem Int Ed Engl 2020; 59:12342-12346. [PMID: 32045085 PMCID: PMC7384176 DOI: 10.1002/anie.202000146] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Indexed: 01/28/2023]
Abstract
While direct nitrene insertions into C-H bonds have become an important tool for building C-N bonds in modern organic chemistry, the generation of nitrene intermediates always requires transition metals, high temperatures, ultraviolet or laser light. We report a mild synthesis of carbazoles and related building blocks through a visible light-induced intramolecular C-H amination reaction. A striking advantage of this new method is the use of more reactive aryl sulfilimines instead of the corresponding hazardous azides. Different catalysts and divergent light sources were tested. The reaction scope is broad and the product yield is generally high. An efficient gram-scale synthesis of Clausine C demonstrates the applicability and scalability of this new method.
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Affiliation(s)
- Xianhai Tian
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Lina Song
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - A. Stephen K. Hashmi
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
- Chemistry DepartmentFaculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia
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37
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Tian X, Song L, Hashmi ASK. Synthese von Carbazolen und Verwandten Heterocyclen aus Sulfiliminen durch Intramolekulare C‐H‐Aminierungen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xianhai Tian
- Institut für Organische Chemie Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Lina Song
- Institut für Organische Chemie Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - A. Stephen K. Hashmi
- Institut für Organische Chemie Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
- Chemistry Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia
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38
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Bhunia S, Ghosh P, Patra SR. Gold‐Catalyzed Oxidative Alkyne Functionalization by N−O/S−O/C−O Bond Oxidants. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000274] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sabyasachi Bhunia
- Department of Chemistry Central University of Jharkhand Ranchi Jharkhand 835205 India
| | - Partha Ghosh
- Department of Chemistry Central University of Jharkhand Ranchi Jharkhand 835205 India
| | - Snigdha Rani Patra
- Department of Chemistry Central University of Jharkhand Ranchi Jharkhand 835205 India
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39
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Antoni PW, Mackenroth AV, Mulks FF, Rudolph M, Helmchen G, Hashmi ASK. Dibenzothiophenesulfilimines: A Convenient Approach to Intermolecular Rhodium-Catalysed C-H Amidation. Chemistry 2020; 26:8235-8238. [PMID: 32428332 PMCID: PMC7383884 DOI: 10.1002/chem.202002371] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Indexed: 11/18/2022]
Abstract
A sulfilimine‐based Group 9 transition‐metal‐catalysed C−H amidation procedure is reported. Dibenzothiophene‐based sulfilimines were shown to constitute a class of novel amidation reagents which enable the transfer of a wide range of N‐sulfonyl and N‐acyl moieties. It was demonstrated that sulfilimines, which are easily accessible from cheap reagents, are safe‐to‐handle and represent broadly applicable amidation reagents. The dibenzothiophene can be recycled after use. The C−H amidation was shown to proceed with high selectivity and gave the mono‐amidated products, mostly in good to excellent yields.
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Affiliation(s)
- Patrick W Antoni
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Alexandra V Mackenroth
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Florian F Mulks
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Günter Helmchen
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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40
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Zang W, Wei Y, Shi M. Divergent Construction of Fully Substituted Pyrroles and Cyclopentadiene Derivatives by Ynamide Annulations: 1,2-Cyclopropyl Migration versus Proton Transfer. Org Lett 2020; 22:5466-5472. [DOI: 10.1021/acs.orglett.0c01819] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenqing Zang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Science, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Science, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Science, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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41
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Zhang S, Zhao Q, Zhao Y, Yu W, Chang J. Synthesis of 2‐Amino Substituted Oxazoles from α‐Amino Ketones and Isothiocyanates
via
Sequential Addition and I
2
‐Mediated Desulfurative Cyclization. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000171] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shuangshuang Zhang
- College of ChemistryZhengzhou University Zhengzhou, Henan Province 450001 People's Republic of China
| | - Qiongli Zhao
- College of ChemistryZhengzhou University Zhengzhou, Henan Province 450001 People's Republic of China
| | - Yifei Zhao
- College of ChemistryZhengzhou University Zhengzhou, Henan Province 450001 People's Republic of China
| | - Wenquan Yu
- College of ChemistryZhengzhou University Zhengzhou, Henan Province 450001 People's Republic of China
| | - Junbiao Chang
- College of ChemistryZhengzhou University Zhengzhou, Henan Province 450001 People's Republic of China
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42
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Tian X, Song L, Hashmi ASK. α-Imino Gold Carbene Intermediates from Readily Accessible Sulfilimines: Intermolecular Access to Structural Diversity. Chemistry 2020; 26:3197-3204. [PMID: 31793680 PMCID: PMC7154771 DOI: 10.1002/chem.201904869] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/01/2019] [Indexed: 11/16/2022]
Abstract
Catalytic approaches to pharmaceutically important bioactive skeletons through gold carbene intermediates have experienced a dramatic development in the last decade. Although various carbene precursors continue to play an important role in heterocyclic syntheses, these reagents are associated with some drawbacks in terms of functional group tolerance, synthetic methods and safety limitations. A new generation of nitrene transfer reagents was established in 2019: the sulfilimines. These are safe, inexpensive and readily available. They can conveniently be stored and handled, and thus represent ideal reagents for the fast and modular modification of scaffolds and the preparation of libraries by intermolecular reactions of two components. Both the practical methods for synthesizing sulfilimines and the versatility of these ylidic species in gold-catalyzed preparation of structural diversity, for both heterocycles and carbocycles, will be outlined in this Concept article.
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Affiliation(s)
- Xianhai Tian
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Lina Song
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - A. Stephen K. Hashmi
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
- Chemistry DepartmentFaculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia
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43
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Tian X, Song L, Farshadfar K, Rudolph M, Rominger F, Oeser T, Ariafard A, Hashmi ASK. Acyl Migration versus Epoxidation in Gold Catalysis: Facile, Switchable, and Atom-Economic Synthesis of Acylindoles and Quinoline Derivatives. Angew Chem Int Ed Engl 2020; 59:471-478. [PMID: 31622542 PMCID: PMC6972584 DOI: 10.1002/anie.201912334] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Indexed: 12/13/2022]
Abstract
We report a switchable synthesis of acylindoles and quinoline derivatives via gold-catalyzed annulations of anthranils and ynamides. α-Imino gold carbenes, generated in situ from anthranils and an N,O-coordinated gold(III) catalyst, undergo electrophilic attack to the aryl π-bond, followed by unexpected and highly selective 1,4- or 1,3-acyl migrations to form 6-acylindoles or 5-acylindoles. With the (2-biphenyl)di-tert-butylphosphine (JohnPhos) ligand, gold(I) carbenes experienced carbene/carbonyl additions to deliver quinoline oxides. Some of these epoxides are valuable substrates for the preparation of 3-hydroxylquinolines, quinolin-3(4H)-ones, and polycyclic compounds via facile in situ rearrangements. The reaction can be efficiently conducted on a gram scale and the obtained products are valuable substrates for preparing other potentially useful compounds. A computational study explained the unexpected selectivities and the dependency of the reaction pathway on the oxidation state and ligands of gold. With gold(III) the barrier for the formation of the strained oxirane ring is too high; whereas with gold(I) this transition state becomes accessible. Furthermore, energetic barriers to migration of the substituents on the intermediate sigma-complexes support the observed substitution pattern in the final product.
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Affiliation(s)
- Xianhai Tian
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Lina Song
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Kaveh Farshadfar
- Department of ChemistryIslamic Azad University, Central Tehran Branch, PoonakTehranIran
| | - Matthias Rudolph
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Frank Rominger
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Thomas Oeser
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Alireza Ariafard
- Department of ChemistryIslamic Azad University, Central Tehran Branch, PoonakTehranIran
- School of Physical SciencesUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - A. Stephen K. Hashmi
- Institut für Organische ChemieHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
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44
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Zhou L, Yang L, Dai S, Gao Y, Fang R, Kirillov AM, Yang L. Insight into the reaction mechanism and chemoselectivity in the cycloaddition of ynamides and isoxazoles with H2O. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01964b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism and chemoselectivity in the cycloaddition of ynamides and isoxazoles have been explored by the density functional theory (DFT) in model systems composed of a Brønsted acid (HNTf2), gold(i) [IPrAuNTf2] or platinum(ii) (PtCl2/CO) catalyst.
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Affiliation(s)
- Lin Zhou
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Li Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Songshan Dai
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yuanyuan Gao
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Ran Fang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Alexander M. Kirillov
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Lizi Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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45
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Li Y, Zhao X. Gold-catalyzed domino cyclization enabling construction of diverse fused azaspiro tetracyclic scaffolds: a cascade catalysis mechanism due to a substrate and counterion. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00120a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The detailed mechanism and origins of gold-catalyzed domino cyclization to diverse fused azaspiro tetracyclic scaffolds by cooperative dual catalysis and cascade catalysis are systematically studied.
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Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
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46
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Easy access to pharmaceutically relevant heterocycles by catalytic reactions involving α-imino gold carbene intermediates. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1874-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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Wang Q, Rudolph M, Rominger F, Hashmi ASK. Gold‐Catalyzed Intermolecular Oxidative Diyne Cyclizations via 1,6‐Carbene Transfer. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901318] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Qian Wang
- Institute of OrganicChemistry Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Matthias Rudolph
- Institute of OrganicChemistry Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Frank Rominger
- Institute of OrganicChemistry Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - A. Stephen K. Hashmi
- Institute of OrganicChemistry Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Chemistry Department, Faculty of ScienceKing Abdulaziz University (KAU) 21589 Jeddah Saudi Arabia
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48
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Tian X, Song L, Farshadfar K, Rudolph M, Rominger F, Oeser T, Ariafard A, Hashmi ASK. Acyl Migration versus Epoxidation in Gold Catalysis: Facile, Switchable, and Atom‐Economic Synthesis of Acylindoles and Quinoline Derivatives. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912334] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Xianhai Tian
- Institut für Organische Chemie Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lina Song
- Institut für Organische Chemie Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Kaveh Farshadfar
- Department of Chemistry Islamic Azad University, Central Tehran Branch, Poonak Tehran Iran
| | - Matthias Rudolph
- Institut für Organische Chemie Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Frank Rominger
- Institut für Organische Chemie Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Thomas Oeser
- Institut für Organische Chemie Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Alireza Ariafard
- Department of Chemistry Islamic Azad University, Central Tehran Branch, Poonak Tehran Iran
- School of Physical Sciences University of Tasmania Private Bag 75 Hobart Tasmania 7001 Australia
| | - A. Stephen K. Hashmi
- Institut für Organische Chemie Heidelberg University Im Neuenheimer Feld 270 69120 Heidelberg Germany
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49
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Cao Z, Zhu J, Liu L, Pang Y, Tian L, Sun X, Meng X. AgNTf 2-catalyzed formal [3 + 2] cycloaddition of ynamides with unprotected isoxazol-5-amines: efficient access to functionalized 5-amino-1 H-pyrrole-3-carboxamide derivatives. Beilstein J Org Chem 2019; 15:2623-2630. [PMID: 31807197 PMCID: PMC6880818 DOI: 10.3762/bjoc.15.255] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 10/15/2019] [Indexed: 12/13/2022] Open
Abstract
A formal [3 + 2] cycloaddition between ynamides and unprotected isoxazol-5-amines has been developed in the presence of catalytic AgNTf2 in an open flask. By the protocol, a variety of functionalized 5-amino-1H-pyrrole-3-carboxamide derivatives can be obtained in up to 99% yield. The reaction mechanism might involve the generation of an unusual α-imino silver carbene intermediate (or a silver-stabilized carbocation) and subsequent cyclization/isomerization to build the significant pyrrole-3-carboxamide motif. The reaction features the use of an inexpensive catalyst, simple reaction conditions, simple work-up without column chromatographic purification for most of products and high yields.
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Affiliation(s)
- Ziping Cao
- Qufu Normal University, School of Chemistry and Chemical Engineering, Qufu 273165, P. R. China
| | - Jiekun Zhu
- Qufu Normal University, School of Chemistry and Chemical Engineering, Qufu 273165, P. R. China
| | - Li Liu
- Qufu Normal University, School of Chemistry and Chemical Engineering, Qufu 273165, P. R. China
| | - Yuanling Pang
- Qufu Normal University, School of Chemistry and Chemical Engineering, Qufu 273165, P. R. China
| | - Laijin Tian
- Qufu Normal University, School of Chemistry and Chemical Engineering, Qufu 273165, P. R. China
- Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Shandong Key Laboratory of Life-Organic Analysis, Qufu 273165, P. R. China
| | - Xuejun Sun
- Qufu Normal University, School of Chemistry and Chemical Engineering, Qufu 273165, P. R. China
| | - Xin Meng
- Qufu Normal University, School of Chemistry and Chemical Engineering, Qufu 273165, P. R. China
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50
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Yu J, Xu G, Tang S, Shao Y, Sun J. Copper-Catalyzed Amino-oxymethylation of Ynamides with N, O-Acetals. Org Lett 2019; 21:9076-9079. [PMID: 31657937 DOI: 10.1021/acs.orglett.9b03468] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A copper-catalyzed 1,2-difunctionalization of ynamides has been developed by using readily available N,O-acetals as the bifunctional reagents. Importantly, contrary to the initially expected 1,2-oxy-aminomethylation reaction, an unprecedented 1,2-amino-oxymethylation has been observed. This reaction is atom-economical and tolerates a broad substrate scope, affording the difunctionalization products in good yield with unique Z configuration.
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Affiliation(s)
- Jianliang Yu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering , Changzhou University , Changzhou 213164 , China
| | - Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering , Changzhou University , Changzhou 213164 , China
| | - Shengbiao Tang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering , Changzhou University , Changzhou 213164 , China
| | - Ying Shao
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering , Changzhou University , Changzhou 213164 , China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering , Changzhou University , Changzhou 213164 , China
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