1
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Aquilina JM, Banerjee A, Morais GN, Chen S, Smith MW. Total Synthesis of (-)-Rauvomine B via a Strain-Promoted Intramolecular Cyclopropanation. J Am Chem Soc 2024; 146:22047-22055. [PMID: 39042605 DOI: 10.1021/jacs.4c07669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
We describe the first total synthesis of the unusual cyclopropane-containing indole alkaloid (-)-rauvomine B via a strategy centered upon intramolecular cyclopropanation of a tetracyclic N-sulfonyltriazole. Preparation of this precursor evolved through two generations of synthesis, with the ultimately successful route involving a palladium-catalyzed stereospecific allylic amination, a cis-selective Pictet-Spengler reaction, and ring-closing metathesis as important bond-forming reactions. The key cyclopropanation step was found to be highly dependent on the structure and conformational strain of the indoloquinolizidine N-sulfonyltriazole precursor, the origins of which are explored computationally through DFT studies. Overall, our synthesis proceeds in 11 total steps and 2.4% yield from commercial materials.
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Affiliation(s)
- Jake M Aquilina
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390, United States
| | - Ankush Banerjee
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390, United States
| | - Gabriel N Morais
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390, United States
- Department of Chemistry and Biochemistry, Oberlin College, 119 Woodland St., Oberlin, Ohio 44074, United States
| | - Shuming Chen
- Department of Chemistry and Biochemistry, Oberlin College, 119 Woodland St., Oberlin, Ohio 44074, United States
| | - Myles W Smith
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390, United States
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2
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Roy S, Wang Y, Zhao X, Dayananda T, Chu JM, Zhang Y, Fasan R. Stereodivergent Synthesis of Pyridyl Cyclopropanes via Enzymatic Activation of Pyridotriazoles. J Am Chem Soc 2024; 146:19673-19679. [PMID: 39008121 DOI: 10.1021/jacs.4c06103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Hemoproteins have recently emerged as powerful biocatalysts for new-to-nature carbene transfer reactions. Despite this progress, these strategies have remained largely limited to diazo-based carbene precursor reagents. Here, we report the development of a biocatalytic strategy for the stereoselective construction of pyridine-functionalized cyclopropanes via the hemoprotein-mediated activation of pyridotriazoles (PyTz) as stable and readily accessible carbene sources. This method enables the asymmetric cyclopropanation of a variety of olefins, including electron-rich and electrodeficient ones, with high activity, high stereoselectivity, and enantiodivergent selectivity, providing access to mono- and diarylcyclopropanes that incorporate a pyridine moiety and thus two structural motifs of high value in medicinal chemistry. Mechanistic studies reveal a multifaceted role of 7-halogen substitution in the pyridotriazole reagent toward favoring multiple catalytic steps in the transformation. This work provides the first example of asymmetric olefin cyclopropanation with pyridotriazoles, paving the way to the exploitation of these attractive and versatile reagents for enzyme-catalyzed carbene-mediated reactions.
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Affiliation(s)
- Satyajit Roy
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75080, United States
| | - Yining Wang
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75080, United States
| | - Xinyi Zhao
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, New Jersey 07030, United States
| | - Thakshila Dayananda
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, New York 14627, United States
| | - Jia-Min Chu
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, New Jersey 07030, United States
| | - Yong Zhang
- Department of Chemistry and Chemical Biology, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, New Jersey 07030, United States
| | - Rudi Fasan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75080, United States
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, New York 14627, United States
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3
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Chen Z, Shimabukuro K, Bacsa J, Musaev DG, Davies HML. D 4-Symmetric Dirhodium Tetrakis(binaphthylphosphate) Catalysts for Enantioselective Functionalization of Unactivated C-H Bonds. J Am Chem Soc 2024; 146:19460-19473. [PMID: 38959398 PMCID: PMC11258696 DOI: 10.1021/jacs.4c06023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 06/09/2024] [Accepted: 06/11/2024] [Indexed: 07/05/2024]
Abstract
Dirhodium tetrakis(2,2'-binaphthylphosphate) catalysts were successfully developed for asymmetric C-H functionalization with trichloroethyl aryldiazoacetates as the carbene precursors. The 2,2'-binaphthylphosphate (BNP) ligands were modified by introduction of aryl and/or chloro functionality at the 4,4',6,6' positions. As the BNP ligands are C2-symmetric, the resulting dirhodium tetrakis(2,2'-binaphthylphosphate) complexes were expected to be D4-symmetric, but X-ray crystallographic and computational studies revealed this is not always the case because of internal T-shaped CH-π and aryl-aryl interactions between the ligands. The optimum catalyst is Rh2(S-megaBNP)4, with 3,5-di(tert-butyl)phenyl substituents at the 4,4' positions and chloro substituents at the 6,6' positions. This catalyst adopts a D4-symmetric arrangement and is ideally suited for site-selective C-H functionalization at unactivated tertiary sites with high levels of enantioselectivity, outperforming the best dirhodium tetracarboxylate catalyst developed for this reaction. The standard reactions were conducted with a catalyst loading of 1 mol % but lower catalyst loadings can be used if desired, as illustrated in the C-H functionalization of cyclohexane in 91% ee with 0.0025 mol % catalyst loading (29,400 turnover numbers). These studies further illustrate the effectiveness of donor/acceptor carbenes in site-selective intermolecular C-H functionalization and expand the toolbox of catalysts available for catalyst-controlled C-H functionalization.
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Affiliation(s)
- Ziyi Chen
- Department
of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Kristin Shimabukuro
- Department
of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - John Bacsa
- Department
of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Djamaladdin G. Musaev
- Department
of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
- Cherry
L. Emerson Center for Scientific Computation, Emory University, 1521
Dickey Drive, Atlanta, Georgia 30322, United States
| | - Huw M. L. Davies
- Department
of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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4
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Ge FB, Lu CJ, Chen X, Yao W, An M, Jiang YK, Xu LP, Liu RR. Enantioselective Nickel-Catalyzed Denitrogenative Transannulation En Route to N-N Atropisomers. Angew Chem Int Ed Engl 2024; 63:e202400441. [PMID: 38587149 DOI: 10.1002/anie.202400441] [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: 01/31/2024] [Revised: 04/06/2024] [Accepted: 04/08/2024] [Indexed: 04/09/2024]
Abstract
Nickel-catalyzed transannulation reactions triggered by the extrusion of small gaseous molecules have emerged as a powerful strategy for the efficient construction of heterocyclic compounds. However, their use in asymmetric synthesis remains challenging because of the difficulty in controlling stereo- and regioselectivity. Herein, we report the first nickel-catalyzed asymmetric synthesis of N-N atropisomers by the denitrogenative transannulation of benzotriazones with alkynes. A broad range of N-N atropisomers was obtained with excellent regio- and enantioselectivity under mild conditions. Moreover, density functional theory (DFT) calculations provided insights into the nickel-catalyzed reaction mechanism and enantioselectivity control.
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Affiliation(s)
- Fang-Bei Ge
- College of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308#, Qingdao, 266071, China
| | - Chuan-Jun Lu
- College of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308#, Qingdao, 266071, China
| | - Xiao Chen
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Wang Yao
- College of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308#, Qingdao, 266071, China
| | - Mei An
- College of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308#, Qingdao, 266071, China
| | - Yu-Kun Jiang
- College of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308#, Qingdao, 266071, China
| | - Li-Ping Xu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Ren-Rong Liu
- College of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308#, Qingdao, 266071, China
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5
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Guo W, Tantillo DJ. Running Wild through Dirhodium Tetracarboxylate-Catalyzed Combined CH(C)-Functionalization/Cope Rearrangement Landscapes: Does Post-Transition-State Dynamic Mismatching Influence Product Distributions? J Am Chem Soc 2024; 146:7039-7051. [PMID: 38418944 DOI: 10.1021/jacs.4c00382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
A special type of C-H functionalization can be achieved through C-H insertion combined with Cope rearrangement (CHCR) in the presence of dirhodium catalysts. This type of reaction was studied using density functional theory and ab initio molecular dynamics simulations, the results of which pointed to the dynamic origins of low yields observed in some experiments. These studies not only reveal intimate details of the complex reaction network underpinning CHCR reactions but also further cement the generality of the importance of nonstatistical dynamic effects in controlling Rh2L4-promoted reactions.
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Affiliation(s)
- Wentao Guo
- Department of Chemistry, University of California, Davis, Davis, California 95616, United States
| | - Dean J Tantillo
- Department of Chemistry, University of California, Davis, Davis, California 95616, United States
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6
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Permingeat Squizatto C, Bianchini MA, Delpiccolo CML. Synthesis of 2,3-Dihydropyrroles by Rhodium(II)-Catalyzed Transannulation of N-Sulfonyl-1,2,3-triazoles: Diversity Generation by One-Pot Methodologies. J Org Chem 2023; 88:16091-16103. [PMID: 37910436 DOI: 10.1021/acs.joc.3c01337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
A versatile one-pot strategy for the generation of compounds of synthetic interest has been presented, promoting the development of practical processes. First, the transannulation of N-sulfonyltriazoles through alkenes and rhodium catalysis was described, giving 2,3-dihydropyrroles in 13-76% yield. As contributions of the strategy, the evaluation of alkenes with different properties, and the use of only drops of solvent (0.40 M) was highlighted. In addition, we described a methodology for the modulation of the N-sulfonyltriazoles, to obtain selectively cyclopropyl tosylimines or 2,3-dihydropyrroles. For the latter products, neat conditions were also included. Finally, the potential of the methodology was demonstrated by the synthesis of six structurally different analogues starting from the same substrates and late-stage transformation of bioactive molecules. These compounds were generated in 38-63% yield, after two or more conversion steps carried out in the same reaction vessel.
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Affiliation(s)
- Caterina Permingeat Squizatto
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario-CONICET, Suipacha 531, Rosario S2002LRK, Argentina
| | - Maira A Bianchini
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario-CONICET, Suipacha 531, Rosario S2002LRK, Argentina
| | - Carina M L Delpiccolo
- Instituto de Química Rosario, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario-CONICET, Suipacha 531, Rosario S2002LRK, Argentina
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7
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Pandey S, Parveen S, Volla CMR. Rh(II)-Catalyzed Denitrogenative Reaction of N-Sulfonyl-1,2,3-triazoles with Quinolones and Isoquinolones. Chem Asian J 2023; 18:e202300614. [PMID: 37665690 DOI: 10.1002/asia.202300614] [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: 07/15/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 09/06/2023]
Abstract
Herein, we developed an efficient approach to access biologically relevant 2-aminoquinolines and 1-aminoisoquinolines from readily available N-sulfonyl-1,2,3-triazoles and 2-quinolones or 1-isoquinolones. This transformation involves the selective O-H insertion of these derivatives onto the in situ generated Rh-azavinyl carbenes (Rh-AVC) followed by rearrangement. The reaction proceeds smoothly under operationally simple conditions and the protocol was found to be scalable.
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Affiliation(s)
- Shivam Pandey
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400076, India
| | - Sabiha Parveen
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400076, India
| | - Chandra M R Volla
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400076, India
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8
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Wang H, Zhou T, Wu M, Ye Q, He X. Substituent-Controllable Cascade Regioselective Annulation of β-Enaminones with N-Sulfonyl Triazoles for Modular Access to Imidazoles and Pyrroles. Molecules 2023; 28:molecules28114416. [PMID: 37298892 DOI: 10.3390/molecules28114416] [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: 05/11/2023] [Revised: 05/26/2023] [Accepted: 05/27/2023] [Indexed: 06/12/2023] Open
Abstract
A controllable synthesis of trisubstituted imidazoles and pyrroles has been developed through rhodium(II)-catalyzed regioselective annulation of N-sulfonyl-1,2,3-trizaoles with β-enaminones. The imidazole ring was formed through a 1,1-insertion of the N-H bond to α-imino rhodium carbene, followed by a subsequent intramolecular 1,4-conjugate addition. This occurred when the α-carbon atom of the amino group was bearing a methyl group. Additionally, the pyrrole ring was constructed by utilizing a phenyl substituent and undergoing intramolecular nucleophilic addition. The mild conditions, good tolerance towards functional groups, gram-scale synthesis capability, and ability to undergo valuable transformations of the products qualify this unique protocol as an efficient tool for the synthesis of N-heterocycles.
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Affiliation(s)
- Hua Wang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
| | - Tongtong Zhou
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
| | - Mengdi Wu
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
| | - Qingqing Ye
- Department of Medicine, Chuzhou City Vocation College, Chuzhou 239000, China
| | - Xinwei He
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China
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9
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Das SK, Roy S, Chattopadhyay B. Transition-Metal-Catalyzed Denitrogenative Annulation to Access High-Valued N-Heterocycles. Angew Chem Int Ed Engl 2023; 62:e202210912. [PMID: 36227158 DOI: 10.1002/anie.202210912] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Indexed: 11/05/2022]
Abstract
Over the past few years, the development of efficient methods to construct high-valued N-heterocyclic molecules have received massive attention owing to their extensive application in the areas of medicinal chemistry, drug discovery, natural product synthesis and so on. To access those high-valued N-heterocycles, many methods have been developed. In this context, transition-metal-catalyzed denitrogenative annulation of 1,2,3-triazoles and 1,2,3,4-tetrazoles has appeared as a powerful synthetic tool because it offers a step- and atom-economical route for the preparation of the nitrogen-rich molecules. Compared with the denitrogenative annulation of various 1,2,3-triazole frameworks, annulation of 1,2,3,4-tetrazole remains more challenging due to the inertness of the tetrazole moiety. This Review summarizes the significant achievements made in the field of denitrogenative annulation of various 1,2,3-triazoles and 1,2,3,4-tetrazoles including some pioneering examples in this area of research. We anticipate that this denitrogenative annulation reaction will find broad applications in the pharmaceutical industry, drug discovery and other fields of medicinal chemistry.
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Affiliation(s)
- Sandip Kumar Das
- Department of Biological & Synthetic Chemistry, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Satyajit Roy
- Department of Biological & Synthetic Chemistry, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Buddhadeb Chattopadhyay
- Department of Biological & Synthetic Chemistry, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
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10
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Bettencourt CJ, Krainz T, Chow S, Parr BT, Tracy WF, Bernhardt PV, Davies HML, Williams CM. Unearthing the Subtleties of Rhodium(II)-Catalyzed Carbenoid Cycloadditions to Furans with an N-Sulfonyl-1,2,3-triazole Probe. Org Lett 2022; 24:9290-9295. [PMID: 36512372 DOI: 10.1021/acs.orglett.2c03869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The rhodium(II)-catalyzed reaction of a model alkenyl donor/acceptor N-sulfonyltriazole with a wide selection of furans is reported. This investigation unearthed a range of structurally diverse carbocyclic and ring-opened products, in good to excellent yields. The products obtained are proposed to arise selectively via cyclopropanation or zwitterionic rearrangement pathways, which are highly dependent on both the structural and electronic features of the furan substrate.
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Affiliation(s)
- Christian J Bettencourt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Tanja Krainz
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Sharon Chow
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Brendan T Parr
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - William F Tracy
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Huw M L Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
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11
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Sontakke GS, Pal K, Volla CMR. Substrate-Dependent Denitrogenative Rearrangements of Rhodium Azavinyl Carbenes Involving 1,2-Aryl Migration. Org Lett 2022; 24:8796-8801. [PMID: 36445048 DOI: 10.1021/acs.orglett.2c03538] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we disclose substrate-dependent rearrangements of 4-substituted N-sulfonyl-1,2,3-triazoles under Rh(II)-catalysis via denitrogenation. The reaction pathways included key 1,2-aryl migration via the formation of intermediatory phenonium ion, which is elusive so far with Rh-azavinyl carbenes. Intriguingly, the transformations were completely dependent on the substituent present leading to different scaffolds like enaminones, pyrrol-3-ones, and azadienes. Hammett studies provided essential insights into the carbocationic intermediate formation. The developed methodology featured simple reaction conditions, excellent functional group compatibility, and broad substrate scope.
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Affiliation(s)
- Geetanjali S Sontakke
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Kuntal Pal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Chandra M R Volla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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12
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Kubiak RW, Tracy WF, Alford JS, Davies HML. Asymmetric Cyclopropanation with 4-Aryloxy-1-sulfonyl-1,2,3-triazoles: Expanding the Range of Rhodium-Stabilized Donor/Acceptor Carbenes to Systems with an Oxygen Donor Group. J Org Chem 2022; 87:13517-13528. [PMID: 36264239 PMCID: PMC10290286 DOI: 10.1021/acs.joc.2c00978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Rhodium-catalyzed enantioselective synthesis of 1-phenoxycyclopropane-1-carbaldehydes by intermolecular cyclopropanation of terminal alkenes followed by imine hydrolysis is described. This methodology utilizes 4-aryloxy-1-sulfonyl-1,2,3-triazoles as the carbene precursors and the chiral dirhodium(II) tetracarboxylates Rh2(S-NTTL)4 or Rh2(S-DPCP)4 as the catalysts. These reactions are considered to proceed via rhodium-stabilized donor/acceptor carbene intermediates, and these studies demonstrate that a heteroatom donor group is compatible with an enantioselective transformation.
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Affiliation(s)
- Robert W Kubiak
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30329, United States
| | - William F Tracy
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30329, United States
| | - Joshua S Alford
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30329, United States
| | - Huw M L Davies
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30329, United States
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13
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Guo W, Hare SR, Chen SS, Saunders CM, Tantillo DJ. C-H Insertion in Dirhodium Tetracarboxylate-Catalyzed Reactions despite Dynamical Tendencies toward Fragmentation: Implications for Reaction Efficiency and Catalyst Design. J Am Chem Soc 2022; 144:17219-17231. [PMID: 36098581 DOI: 10.1021/jacs.2c07681] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rh-catalyzed C-H insertion reactions to form β-lactones suffer from post-transition state bifurcations, with the same transition states leading to ketones and ketenes via fragmentation in addition to β-lactones. In such a circumstance, traditional transition state theory cannot predict product selectivity, so we employed ab initio molecular dynamics simulations to do so and provide a framework for rationalizing the origins of said selectivity. Weak interactions between the catalyst and substrate were studied using energy decomposition and noncovalent interaction analyses, which unmasked an important role of the 2-bromophenyl substituent that has been used in multiple β-lactone-forming C-H insertion reactions. Small and large catalysts were shown to behave differently, with the latter providing a means of overcoming dynamically preferred fragmentation by lowering the barrier for the recombination of the product fragments in the grip of the large catalyst active site cavity.
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Affiliation(s)
- Wentao Guo
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Stephanie R Hare
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Shu-Sen Chen
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Carla M Saunders
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Dean J Tantillo
- Department of Chemistry, University of California, Davis, California 95616, United States
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14
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Akter M, Rupa K, Anbarasan P. 1,2,3-Triazole and Its Analogues: New Surrogates for Diazo Compounds. Chem Rev 2022; 122:13108-13205. [DOI: 10.1021/acs.chemrev.1c00991] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Monalisa Akter
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Kavuri Rupa
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Pazhamalai Anbarasan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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15
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Mishra DR, Panda BS, Nayak S, Panda J, Mohapatra S. Recent Advances in the Synthesis of 5‐Membered
N
‐Heterocycles via Rhodium Catalysed Cascade Reactions. ChemistrySelect 2022. [DOI: 10.1002/slct.202200531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Deepak R. Mishra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Bhabani S. Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Sabita Nayak
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Jasmine Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Seetaram Mohapatra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
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16
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Yavari I, Ghorbanzadeh M, Akbarzadeh S. A synthesis of fuctionalized 2-amino-3-cyano pyrroles from terminal alkynes, sulfonyl azides and phenacylmalononitriles. Org Biomol Chem 2022; 20:4352-4360. [PMID: 35575246 DOI: 10.1039/d2ob00277a] [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 new strategy for the construction of functionalized 2-amino-3-cyano pyrroles has been developed. The reactions involved a copper-catalyzed azide-alkyne cycloaddtion reaction between terminal alkynes and sulfonyl azides followed by generation of N-sulfonoketenimine intermediates. Interception of these reactive ketenimines by phenacylmalononitriles in the presence of copper(I) iodide and Et3N afforded the expected products. The reaction proceeded smoothly in THF at ambient temperature to afford the target compounds in 70-92% yields and excellent regioselectivity. Evidence for the structure of a typical product is obtained from single-crystal X-ray analyses.
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Affiliation(s)
- Issa Yavari
- Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
| | - Meysam Ghorbanzadeh
- Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
| | - Somayeh Akbarzadeh
- Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
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17
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Hill HM, Tucker ZD, Rodriguez KX, Wendt KA, Ashfeld BL. Generation of Functionalized Azepinone Derivatives via a (4 + 3)-Cycloaddition of Vinyl Ketenes and α-Imino Carbenes Derived from N-Sulfonyl-triazoles. J Org Chem 2022; 87:3825-3833. [PMID: 35188763 DOI: 10.1021/acs.joc.1c03002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An intermolecular RhII-catalyzed, formal (4 + 3)-cycloaddition between vinyl ketenes and N-sulfonyl-1,2,3-triazoles for the construction of azepinone products is described. Employing vinyl ketenes as a 1,4-dipolar surrogate, instead of the more commonly used dienyl moieties, allows for the intermolecular and selective formation of azepinone products over a potential (3 + 2)-cycloadduct under mild reaction conditions allows for the generation of azepinone products in up to 98% yield.
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Affiliation(s)
- Harrison M Hill
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Zachary D Tucker
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Kevin X Rodriguez
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Katelyn A Wendt
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Brandon L Ashfeld
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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18
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Liu Y, Chen Y, Yihuo A, Zhou Y, Liu X, Lin L, Feng X. Diastereodivergent Synthesis of Chiral α-Aminoketones via a Catalytic O–H Insertion/Barnes–Claisen Rearrangement Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05789] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yun Liu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Yushuang Chen
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Aying Yihuo
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Yuqiao Zhou
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Lili Lin
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
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19
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Williams MB, Wells RJ, Boyer A. Synthesis and reactivity of 1-sulfonylcyclooctatriazoles. Chem Commun (Camb) 2022; 58:12495-12498. [DOI: 10.1039/d2cc03648g] [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
Sulfonyl azides undergo rapid inverse electron demand SPAAC with strained alkynes to deliver 1-sulfonyl-1,2,3-triazoles. Treatment of these with Rh(ii) carboxylate catalyst promotes denitrogenation and transannular 1,5-H insertion or 1,2-H shift.
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Affiliation(s)
| | | | - Alistair Boyer
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
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20
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Understanding diversified chemoseletivities in Rh2(II)-catalyzed intramolecular annulation reactions of diazo and N-Sulfonyl-1,2,3-triazole compounds: A DFT study. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.112047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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21
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Miura T, Ishihara Y, Nakamuro T, Moritani S, Nagata Y, Murakami M. Synthesis, Structure, and Dynamics of Chiral Eight-Membered Cyclic Molecules with Thienylene and Cyclopropylene Units Alternately Connected. Chemistry 2021; 28:e202103962. [PMID: 34928539 DOI: 10.1002/chem.202103962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Indexed: 11/09/2022]
Abstract
A rhodium(II)-catalyzed asymmetric cyclooligomerization of bifunctional monomers possessing triazolyl and vinyl groups at 2,3- and 3,4-positions on the thiophene ring is studied. Structurally interesting cyclic dimers in which thienylene and cyclopropylene units are alternately connected are obtained as the major components. The eight-membered rings in the center are non-planar and adopt a tub-shaped conformation. We also observe the phenomenon of racemization caused by a tub-to-tub ring-flipping, the activation energy of which is determined as 108 kJ mol -1 by electronic circular dichroism spectra measurement.
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Affiliation(s)
- Tomoya Miura
- Okayama University, Division of Applied Chemistry, Tsushimanaka 3-1-1, 700-8530, Okayama, JAPAN
| | - Yumi Ishihara
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
| | - Takayuki Nakamuro
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
| | - Shunsuke Moritani
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
| | - Yuuya Nagata
- Hokkaido University, Institute for Chemical Reaction Design and Discovery, JAPAN
| | - Masahiro Murakami
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
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22
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Li F, Pei C, Quaranta C, Koenigs RM. 1,3‐Difunctionalization of Imino‐Carbenes via Rhodium‐Catalyzed Reactions of Triazoles with Acyl Selenides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Fang Li
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Chao Pei
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Calogero Quaranta
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Rene M. Koenigs
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
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23
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Facile generation of bridged medium-sized polycyclic systems by rhodium-catalysed intramolecular (3+2) dipolar cycloadditions. Nat Commun 2021; 12:5239. [PMID: 34475378 PMCID: PMC8413281 DOI: 10.1038/s41467-021-25513-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 08/05/2021] [Indexed: 11/22/2022] Open
Abstract
Bridged medium-sized bicyclo[m.n.2] ring systems are common in natural products and potent pharmaceuticals, and pose a great synthetic challenge. Chemistry for making bicyclo[m.n.2] ring systems remains underdeveloped. Currently, there are no general reactions available for the single-step synthesis of various bridged bicyclo[m.n.2] ring systems from acyclic precursors. Here, we report an unusual type II intramolecular (3+2) dipolar cycloaddition strategy for the syntheses of various bridged bicyclo[m.n.2] ring systems. This rhodium-catalysed cascade reaction provides a relatively general strategy for the direct and efficient regioselective and diastereoselective synthesis of highly functionalized and synthetically challenging bridged medium-sized polycyclic systems. Asymmetric total synthesis of nakafuran-8 was accomplished using this method as a key step. Quantum mechanical calculations demonstrate the mechanism of this transformation and the origins of its multiple selectivities. This reaction will inspire the design of the strategies to make complex bioactive molecules with bridged medium-sized polycyclic systems. The bridged medium-sized ring bicyclo[m.n.2] family of natural products are commonly found but difficult to synthesize efficiently. Here the authors present a cascade reaction to form the carbon skeleton, via a [3+2] cycloaddition of a captured azavinyl carbene intermediate.
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24
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Li YL, Zhang PC, Wu HH, Zhang J. Palladium-Catalyzed Asymmetric Tandem Denitrogenative Heck/Tsuji-Trost of Benzotriazoles with 1,3-Dienes. J Am Chem Soc 2021; 143:13010-13015. [PMID: 34402615 DOI: 10.1021/jacs.1c07212] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The asymmetric denitrogenative cycloaddition has emerged as a powerful tool to build chiral aza-heterocyles. However, only one example of asymmetric denitrogenative cycloaddition of benzotriazole with unsaturated hydrocarbons has been explored so far, because the ring-opening of benzotriazole to generate α-imino metal carbenoid species is a thermodynamically unfavorable process. We herein report an efficient asymmetric denitrogenative cycloaddition of benzotriazoles with cyclic and acyclic 1,3-dienes enabled by Pd and chiral sulfonamide phosphine ligand. A variety of substituted hexahydrocarbazoles and indolines were delivered in good yields with high ee values. Interestingly, a pair of enantiomers could be obtained with the use of Xu1 and PC2 with the same absolute configuration. The synthetic utilities of the optically active hexahydrocarbazoles were also showcased.
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Affiliation(s)
- Yin-Lin Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
| | - Pei-Chao Zhang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P. R. China
| | - Hai-Hong Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China.,Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, P. R. China
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25
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Patel SC, Smith MW, Mercer JAM, Suzuki K, Burns NZ. Enantioselective Cyclobutenylation of Olefins Using N-Sulfonyl-1,2,3-Triazoles as Vicinal Dicarbene Equivalents. Org Lett 2021; 23:6530-6535. [PMID: 34374544 DOI: 10.1021/acs.orglett.1c02331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclobutenes are highly useful synthetic intermediates as well as important motifs in bioactive small molecules. Herein, we report a regio-, chemo-, and enantioselective synthesis of cyclobutenes from olefins using N-sulfonyl-1,2,3-triazoles as vicinal dicarbene equivalents or alkyne [2 + 2] cycloaddition surrogates. Terminal and cis-olefins can be transformed into enantioenriched cyclopropanes via rhodium catalysis. Then, in one pot, treatment of these intermediates with tosyl hydrazide and base effects diazo formation followed by rhodium-catalyzed ring expansion to yield enantioenriched cyclobutenes. These cyclobutenes can be transformed into highly substituted, enantioenriched cyclobutanes, including structures relevant to natural product scaffolds.
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Affiliation(s)
- Sajan C Patel
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Myles W Smith
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jaron A M Mercer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Kensuke Suzuki
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Noah Z Burns
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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26
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Wang X, Ke J, Zhu Y, Deb A, Xu Y, Zhang XP. Asymmetric Radical Process for General Synthesis of Chiral Heteroaryl Cyclopropanes. J Am Chem Soc 2021; 143:11121-11129. [PMID: 34282613 PMCID: PMC8399893 DOI: 10.1021/jacs.1c04655] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A highly efficient catalytic method has been developed for asymmetric radical cyclopropanation of alkenes with in situ-generated α-heteroaryldiazomethanes via Co(II)-based metalloradical catalysis (MRC). Through fine-tuning the cavity-like environments of newly-synthesized D2-symmetric chiral amidoporphyrins as the supporting ligand, the optimized Co(II)-based metalloradical system is broadly applicable to α-pyridyl and other α-heteroaryldiazomethanes for asymmetric cyclopropanation of wide-ranging alkenes, including several types of challenging substrates. This new catalytic methodology provides a general access to valuable chiral heteroaryl cyclopropanes in high yields with excellent both diastereoselectivities and enantioselectivities. Combined computational and experimental studies further support the underlying stepwise radical mechanism of the Co(II)-based olefin cyclopropanation involving α- and γ-metalloalkyl radicals as the key intermediates.
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Affiliation(s)
- Xiaoxu Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Jing Ke
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yiling Zhu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Arghya Deb
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yijie Xu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - X Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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27
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Pal K, Volla CMR. Rh(II)-catalyzed Denitrogenative Cascade of 1,2,3-Triazolyl Propiolates and Indoles: Access to Butenolide Tethered Homotryptamines. Org Lett 2021; 23:4294-4299. [PMID: 34019428 DOI: 10.1021/acs.orglett.1c01215] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient Rh(II)-catalyzed denitrogenative reaction of indoles with 1,2,3-triazolyl propiolates has been developed. This methodology provides facile access to butenolide tethered homotryptamines in good to excellent yields under operationally simple conditions and features a broad substrate scope. Overall, the reaction sequence involves the formation of three new bonds (two C-C and one C-O) in a nucleophilic cascade manner. Additionally, an intramolecular rearrangement of these derivatives to thermodynamically more stable butenolides is also demonstrated.
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Affiliation(s)
- Kuntal Pal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
| | - Chandra M R Volla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
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28
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Li X, Chen H, Xuan Q, Mai S, Lan Y, Song Q. Biomimetic Carbene Cascades Enabled Imine Derivative Migration from Carbene -Bearing Thiocarbamates. Org Lett 2021; 23:3518-3523. [PMID: 33904743 DOI: 10.1021/acs.orglett.1c00930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inspired by the body circulation of Omeprazole (irreversible proton pump inhibitor), we disclose the carbene-triggered cascades for the synthesis of 2-aminobenzofuran derivatives from N-sulfonyl-1,2,3-triazoles or benzothioazole-bearing thiocarbamates, which represents an unprecedented imine derivative migration process. Furthermore, the desulfurizing reagent-free Barton-Kellogg-type reactions starting from N-sulfonyl-1,2,3-triazoles have also been achieved for the first time, and elemental sulfur is confirmed as a byproduct during this transformation. Both experimental data and DFT calculations further thoroughly explained the unique reactivity.
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Affiliation(s)
- Xue Li
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
| | - Haohua Chen
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China
| | - Qingqing Xuan
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
| | - Shaoyu Mai
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
| | - Yu Lan
- Chongqing Key Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China.,Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Chemical Engineering and College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China.,Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou 350108, P. R. China.,State Key Laboratory of Organometallic Chemistry and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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29
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Li F, Pei C, Koenigs RM. Rhodium-catalyzed cascade reactions of triazoles with organoselenium compounds - a combined experimental and mechanistic study. Chem Sci 2021; 12:6362-6369. [PMID: 34084435 PMCID: PMC8115268 DOI: 10.1039/d1sc00495f] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Herein, we report on our studies on the reaction of organoselenium compounds with triazoles under thermal conditions using simple Rh(ii) catalysts. These reactions do not provide the product of classic rearrangement reactions. Instead two different cascade reactions were uncovered. While allyl selenides react in a cascade of sigmatropic rearrangement and selenium-mediated radical cyclization reaction to give dihydropyrroles, cinnamyl selenides undergo a double rearrangement reaction cascade involving a final aza-Cope reaction to give the product of 1,3-difunctionalization. Theoretical and experimental studies were conducted to provide an understanding of the reaction mechanism of these cascade reactions. The former provide an important insight into fundamental question on the nature of the ylide intermediate in rearrangement reactions and reveal that organoselenium compounds take up multiple roles in rearrangement reactions and mediate a free ylide reaction mechanism. Herein, we report on our studies on the reaction of organoselenium compounds with triazoles under thermal conditions using simple Rh(ii) catalysts.![]()
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Affiliation(s)
- Fang Li
- RWTH Aachen University, Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Chao Pei
- RWTH Aachen University, Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Rene M Koenigs
- RWTH Aachen University, Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
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30
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Li X, Golz C, Alcarazo M. α-Diazo Sulfonium Triflates: Synthesis, Structure, and Application to the Synthesis of 1-(Dialkylamino)-1,2,3-triazoles. Angew Chem Int Ed Engl 2021; 60:6943-6948. [PMID: 33351262 PMCID: PMC8048477 DOI: 10.1002/anie.202014775] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/13/2020] [Indexed: 01/03/2023]
Abstract
The one-pot synthesis of a series of sulfonium salts containing transferable diazomethyl groups is described, and the structure of these compounds is elucidated by X-ray crystallography. Under photochemical conditions, reaction of these salts with N,N-dialkyl hydrazones affords 1-(dialkylamino)-1,2,3-triazoles via diazomethyl radical addition to the azomethine carbon followed by intramolecular ring closure. The straightforward transformation of the structures thus obtained into mesoionic carbene-metal complexes is also reported and the donor properties of these new ligands characterized.
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Affiliation(s)
- Xiangdong Li
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 237077GöttingenGermany
| | - Christopher Golz
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 237077GöttingenGermany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 237077GöttingenGermany
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31
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Liu Z, Chen L, Zhu D, Zhu S. Formal Allylation and Enantioselective Cyclopropanation of Donor/Acceptor Rhodium(II) Azavinyl Carbenes. Org Lett 2021; 23:1275-1279. [PMID: 33534583 DOI: 10.1021/acs.orglett.0c04251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A highly efficient formal allylation of dihydronaphthotriazoles with alkenes under rhodium(II) catalysis is reported. Various allyl dihydronaphthalene derivatives were furnished via rhodium(II) azavinyl carbenes with moderate to good yields and excellent chemoselectivity. When monosubstituted alkenes are used, cyclopropanation occurs and good to excellent enantioselectivities have been achieved. Particularly noteworthy is the allylic C(sp2)-H activation instead of traditional C(sp3)-H activation in the formal allylation process.
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Affiliation(s)
- Zhili Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Lianfen Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Dong Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Shifa Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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32
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Li X, Golz C, Alcarazo M. α‐Diazo Sulfonium Triflates: Synthesis, Structure, and Application to the Synthesis of 1‐(Dialkylamino)‐1,2,3‐triazoles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014775] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiangdong Li
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstr. 2 37077 Göttingen Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstr. 2 37077 Göttingen Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstr. 2 37077 Göttingen Germany
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33
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Affiliation(s)
- Radim Hrdina
- Institute of Organic Chemistry Justus-Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
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34
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Li Y, Tang Y. Sadphos-Enabled Asymmetric Tandem Denitrogenative Heck/Tsuji- Trost Reaction of Benzotriazoles with 1,3-Dienes. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202100079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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Lv K, Bao X. Mechanistic insights into the Rh( i)-catalyzed transannulation of 1,2,3-thiadiazoles with alkenes, alkynes, and nitriles: Does the intermediacy of α-thiavinyl Rh-carbenoids play an important role? Org Chem Front 2021. [DOI: 10.1039/d0qo01246g] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Density functional theory (DFT) calculations were performed to gain an in-depth mechanistic understanding of the Rh(i)-catalyzed transannulation of 1,2,3-thiadiazoles with alkenes, alkynes, and nitriles.
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Affiliation(s)
- Kang Lv
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Xiaoguang Bao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
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36
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Zhang Y, Yang Y, Xue Y. Elucidating the mechanism and origins of selectivity on catalyst-dependent cyclization reactions to form polycyclic indolines from a theoretical study. RSC Adv 2021; 11:20622-20634. [PMID: 35479382 PMCID: PMC9033988 DOI: 10.1039/d1ra01632f] [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: 03/02/2021] [Accepted: 06/02/2021] [Indexed: 11/30/2022] Open
Abstract
There is a significant role for bioactive polycyclic indolines in the pharmaceutical science field. In this paper, a systematic DFT study at the M06-D3/SMD/BS2//B3LYP-D3/BS1 level is adopted to investigate the cyclization reaction catalyzed by Rh2(esp)2 and InCl3 to generate polycyclic indolines. Luckily, the simplification of the Rh2(esp)2 computational model is feasible, and successfully used in this study. The computational results detailed indicate the reaction mechanisms catalyzed by different catalysts, and the regio- and diastereo-selectivity. The regio-selectivity is controlled by the weak interaction (reflected in repulsive interaction) of the key transition state in the InCl3-catalyzed pathway, and the larger distortion energy makes the regio-selectivity more obvious in the pathway catalyzed by Rh2(esp)2. It is important that this theoretical study suggests the significance of the catalyst in the reaction system in detail by NBO and FMO analysis. This paper is a good explanation of the experimental phenomenon caused by the catalyst where InCl3 is more significant than Rh2(esp)2. The reaction mechanism and the importance of the catalysts are revealed in detail by this particular theoretical study. The mechanism and origins of selectivities of multiply catalyzed cyclization reactions catalyzed by Rh2(esp)2 and InCl3 are investigated by DFT calculations as well as distortion/interaction and noncovalent interaction (NCI) analyses.![]()
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Affiliation(s)
- Yan Zhang
- College of Chemistry
- Key Lab of Green Chemistry and Technology in Ministry of Education
- Sichuan University
- Chengdu 610064
- People's Republic of China
| | - Yongsheng Yang
- College of Chemistry
- Key Lab of Green Chemistry and Technology in Ministry of Education
- Sichuan University
- Chengdu 610064
- People's Republic of China
| | - Ying Xue
- College of Chemistry
- Key Lab of Green Chemistry and Technology in Ministry of Education
- Sichuan University
- Chengdu 610064
- People's Republic of China
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37
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Guarnieri-Ibáñez A, de Aguirre A, Besnard C, Poblador-Bahamonde AI, Lacour J. Regiodivergent synthesis of pyrazino-indolines vs. triazocines via α-imino carbenes addition to imidazolidines. Chem Sci 2020; 12:1479-1485. [PMID: 34163911 PMCID: PMC8179195 DOI: 10.1039/d0sc05725h] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Hexahydropyrazinoindoles were prepared in a single step from N-sulfonyl triazoles and imidazolidines. Under dirhodium catalysis, α-imino carbenes were generated and formed nitrogen ylide intermediates that, after subsequent aminal opening, afforded the pyrazinoindoles predominantly via formal [1,2]-Stevens and tandem Friedel–Crafts cyclizations. Of mechanistic importance, a regiodivergent reactivity was engineered through the use of a specific unsymmetrically substituted imidazolidine that promoted the exclusive formation of 8-membered ring 1,3,6-triazocines. Based on DFT calculations, an original Curtin–Hammett-like situation was demonstrated for the mechanism. Further derivatizations led to functionalized tetrahydropyrazinoindoles in high yields. Hexahydropyrazinoindoles are prepared in a single step from N-sulfonyl triazoles and imidazolidines. Of mechanistic importance, a regiodivergent reactivity can be engineered towards the exclusive formation of 8-membered ring 1,3,6-triazocines.![]()
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Affiliation(s)
- Alejandro Guarnieri-Ibáñez
- Department of Organic Chemistry, University of Geneva Quai Ernest Ansermet 30, 1211 Geneva 4 Switzerland
| | - Adiran de Aguirre
- Department of Organic Chemistry, University of Geneva Quai Ernest Ansermet 30, 1211 Geneva 4 Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva Quai Ernest Ansermet 24, 1211 Geneva 4 Switzerland
| | | | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva Quai Ernest Ansermet 30, 1211 Geneva 4 Switzerland
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38
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Miura T, Nakamuro T, Ishihara Y, Nagata Y, Murakami M. Chiral Macrocycles Having C 3 Symmetry Resulting from Orientation of Thiophene Rings. Angew Chem Int Ed Engl 2020; 59:20475-20479. [PMID: 32770591 DOI: 10.1002/anie.202009781] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/06/2020] [Indexed: 12/20/2022]
Abstract
An chiral RhII -catalyzed cyclooligomerization reaction of thiophenes having triazolyl and vinyl substituents at the 2- and 4-positions was studied. Structurally interesting cyclic trimers, having chirality that is ascribed only to the orientation of the 2,4-disubstituted thiophene rings, are obtained. The 2,4-disubstitution of the starting thiophene monomer allows production of each of the enantiomers. The observed electronic circular-dichroism spectra are in accord with those simulated by density-functional theory calculations.
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Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Takayuki Nakamuro
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan.,Present address: Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yumi Ishihara
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Yuuya Nagata
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan.,Present address: Institute for Chemical Reaction Design and Discovery, Hokkaido University, Kita 21 Nishi 10, Kita-Ku, Sapporo, Hokkaido, 001-0021, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
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39
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Miura T, Nakamuro T, Ishihara Y, Nagata Y, Murakami M. Chiral Macrocycles Having
C
3
Symmetry Resulting from Orientation of Thiophene Rings. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009781] [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)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University, Katsura Kyoto 615-8510 Japan
| | - Takayuki Nakamuro
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University, Katsura Kyoto 615-8510 Japan
- Present address: Department of Chemistry The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Yumi Ishihara
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University, Katsura Kyoto 615-8510 Japan
| | - Yuuya Nagata
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University, Katsura Kyoto 615-8510 Japan
- Present address: Institute for Chemical Reaction Design and Discovery Hokkaido University Kita 21 Nishi 10, Kita-Ku Sapporo, Hokkaido 001-0021 Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University, Katsura Kyoto 615-8510 Japan
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40
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Zhang Z, Gevorgyan V. Co-Catalyzed Transannulation of Pyridotriazoles with Isothiocyanates and Xanthate Esters. Org Lett 2020; 22:8500-8504. [PMID: 33044833 PMCID: PMC7655727 DOI: 10.1021/acs.orglett.0c03099] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient radical transannulation reaction of pyridotriazoles with isothiocyanates and xanthate esters was developed. This method features conversion of pyridotriazoles into two N-fused heterocyclic aromatic systems-imino-thiazolopyridines and oxo-thiazolopyridine derivatives-via one-step Co(II)-catalyzed transannulation reaction proceeding via a radical mechanism. The synthetic usefulness of the developed method was illustrated in the synthesis of amino acid derivatives and further transformations of obtained reaction products.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75080, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75080, United States
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41
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Synergy of activating substrate and introducing C-H···O interaction to achieve Rh2(II)-catalyzed asymmetric cycloisomerization of 1,n-enynes. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9794-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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42
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Li F, Pei C, Koenigs RM. Rhodium-Catalyzed Enamine Homologation of Sulfides with Triazoles as Carbene Precursor. Org Lett 2020; 22:6816-6821. [DOI: 10.1021/acs.orglett.0c02330] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Fang Li
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Chao Pei
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Rene M. Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
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43
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Pal K, Sontakke GS, Volla CMR. Rh(II)‐Catalyzed Denitrogenative Reaction of 1,2,3‐Triazolyl Esters with Indoles or Arenes: Efficient Synthesis of Homotryptamines or Allylamines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000632] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kuntal Pal
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai 400076, India
| | - Geetanjali S. Sontakke
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai 400076, India
| | - Chandra M. R. Volla
- Department of ChemistryIndian Institute of Technology Bombay, Powai Mumbai 400076, India
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44
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Li W, Zhang J. Synthesis of Heterocycles through Denitrogenative Cyclization of Triazoles and Benzotriazoles. Chemistry 2020; 26:11931-11945. [DOI: 10.1002/chem.202000674] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/07/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Wenbo Li
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 N. Zhongshan Road Shanghai 20062 P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 N. Zhongshan Road Shanghai 20062 P. R. China
- Department of ChemistryFudan University 2005 Songhu Road Shanghai 20048 P. R. China
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45
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He X, Wu Y, Zhou T, Zuo Y, Xie M, Li R, Duan J, Shang Y. Rh-catalyzed C–N coupling of N-sulfonyl-1,2,3-trizales with secondary amines for regioselective synthesis of phenylvinyl-1,2-diamines. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1781185] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xinwei He
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
| | - Yuhao Wu
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
| | - Tongtong Zhou
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
| | - Youpeng Zuo
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
| | - Mengqing Xie
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
| | - Ruxue Li
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
| | - Jiahui Duan
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
| | - Yongjia Shang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, P. R. China
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46
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Ross RJ, Jeyaseelan R, Lautens M. Rhodium-Catalyzed Intermolecular Cyclopropanation of Benzofurans, Indoles, and Alkenes via Cyclopropene Ring Opening. Org Lett 2020; 22:4838-4843. [PMID: 32496786 DOI: 10.1021/acs.orglett.0c01655] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The generation of metal carbenoids via ring opening of cyclopropenes by transition metals offers a simple entry into highly reactive intermediates. Herein, we describe a diastereoselective intermolecular rhodium-catalyzed cyclopropanation of heterocycles and alkenes using cyclopropenes as carbene precursors with a low loading of a commercially available rhodium catalyst. The reported method is scalable and could be performed with catalyst loadings as low as 0.2 mol %, with no impact to the reaction yield or selectivity.
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Affiliation(s)
- Rachel J Ross
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Rubaishan Jeyaseelan
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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47
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Kona CN, Nishii Y, Miura M. Thioether-Directed C4-Selective C–H Acylmethylation of Indoles Using α-Carbonyl Sulfoxonium Ylides. Org Lett 2020; 22:4806-4811. [DOI: 10.1021/acs.orglett.0c01617] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Chandrababu Naidu Kona
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuji Nishii
- Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masahiro Miura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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48
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Ageshina AA, Chesnokov GA, Topchiy MA, Alabugin IV, Nechaev MS, Asachenko AF. Making endo-cyclizations favorable again: a conceptually new synthetic approach to benzotriazoles via azide group directed lithiation/cyclization of 2-azidoaryl bromides. Org Biomol Chem 2019; 17:4523-4534. [PMID: 30994147 DOI: 10.1039/c9ob00615j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Although benzotriazoles are important and ubiquitous, currently there is only one conceptual approach to their synthesis: bridging the two ortho-amino groups with an electrophilic nitrogen atom. Herein, we disclose a new practical alternative - the endo-cyclization of 2-azidoaryl lithiums obtained in situ from 2-azido-aryl bromides. The scope of the reaction is illustrated using twenty-four examples with a variety of alkyl, alkoxy, perfluoroalkyl, and halogen substituents. We found that the directing effect of the azide group allows selective metal-halogen exchange in aryl azides containing several bromine atoms. Furthermore, (2-bromophenyl)diazomethane undergoes similar cyclization to give an indazole. Thus, cyclizations of aryl lithiums containing an ortho-X = Y = Z group emerge as a new general approach for the synthesis of aromatic heterocycles. DFT computations suggested that the observed endo-selectivity applies to the anionic cyclizations of other functionalities that undergo "1,1-additions" (i.e., azides, diazo compounds, and isonitriles). In contrast, cyclizations with the heteroatomic functionalities that follow the "1,2-addition" pattern (cyanates, thiocyanates, isocyanates, isothiocyanates, and nitriles) prefer the exo-cyclization path. Hence, such reactions expand the current understanding of stereoelectronic factors in anionic cyclizations.
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Affiliation(s)
- Alexandra A Ageshina
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Leninskiy prospect 29, Russian Federation.
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49
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Herraiz AG, Suero MG. A transition-metal-free & diazo-free styrene cyclopropanation. Chem Sci 2019; 10:9374-9379. [PMID: 32110302 PMCID: PMC7017872 DOI: 10.1039/c9sc02749a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/17/2019] [Indexed: 12/13/2022] Open
Abstract
An operationally simple and broadly applicable novel cyclopropanation of styrenes using gem-diiodomethyl carbonyl reagents has been developed. Visible-light triggered the photoinduced generation of iodomethyl carbonyl radicals, able to cyclopropanate a wide array of styrenes with excellent chemoselectivity and functional group tolerance. To highlight the utility of our photocyclopropanation, we demonstrated the late-stage functionalization of biomolecule derivatives.
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Affiliation(s)
- Ana G Herraiz
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , Tarragona , 43007 , Spain .
- Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , Calle Marcel. lí Domingo, 1 , Tarragona , 43007 , Spain
| | - Marcos G Suero
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , Tarragona , 43007 , Spain .
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50
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Zhang Z, Yadagiri D, Gevorgyan V. Light-induced metal-free transformations of unactivated pyridotriazoles. Chem Sci 2019; 10:8399-8404. [PMID: 31803418 PMCID: PMC6844233 DOI: 10.1039/c9sc02448d] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 07/24/2019] [Indexed: 01/01/2023] Open
Abstract
A highly efficient and practical method for incorporation of the arylmethylpyridyl moiety into diverse molecules has been developed. This method features the transition metal-free light-induced room temperature transformation of pyridotriazoles into pyridyl carbenes, which are capable of smooth arylation, X-H insertion, and cyclopropanation reactions. The synthetic usefulness of the developed method was illustrated in a facile synthesis of biologically active molecules.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor St. , Chicago , Illinois 60607 , USA
- Department of Chemistry and Biochemistry , University of Texas at Dallas , 800 W Campbell RD , Richardson , Texas 75080 , USA .
| | - Dongari Yadagiri
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor St. , Chicago , Illinois 60607 , USA
- Department of Chemistry and Biochemistry , University of Texas at Dallas , 800 W Campbell RD , Richardson , Texas 75080 , USA .
| | - Vladimir Gevorgyan
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor St. , Chicago , Illinois 60607 , USA
- Department of Chemistry and Biochemistry , University of Texas at Dallas , 800 W Campbell RD , Richardson , Texas 75080 , USA .
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