1
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Mukherjee U, Shah JA, Musaev DG, Ngai MY. Harnessing Bromo/Acyloxy Transposition (BrAcT) and Excited-State Copper Catalysis for Styrene Difunctionalization. J Am Chem Soc 2024. [PMID: 39042434 DOI: 10.1021/jacs.4c08984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
1,2-Difunctionalization of styrenes, adding two distinct functional groups across the C═C double bond, has emerged as a powerful tool for enhancing molecular complexity. Herein, we report the development of a regioconvergent β-acyloxylation-α-ketonylation of styrenes through bromo/acyloxy transposition (BrAcT) and excited-state copper catalysis. This approach is amenable to gram-scale synthesis and tolerates a wide range of functional groups and complex molecular frameworks, including derivatives of natural products and marketed drugs. Our experimental and computational studies suggest a unique mechanism featuring a dynamic, ionic BrAcT process and excited-state copper-catalyzed redox reactions. We anticipate that this BrAcT process could serve as a broadly applicable and versatile strategy for β-acyloxylation-α-functionalization of styrenes, creating valuable intermediates for preparing new pharmaceuticals, agrochemicals, and functional materials.
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Affiliation(s)
- Upasana Mukherjee
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47906, United States
| | - Jagrut A Shah
- Department of Chemistry, State University of New York, Stony Brook, New York 11794, United States
| | - Djamaladdin G Musaev
- Cherry L. Emerson Center for Scientific Computation, and Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Ming-Yu Ngai
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47906, United States
- Department of Chemistry, State University of New York, Stony Brook, New York 11794, United States
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2
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Shan QC, Wu YW, Chen MX, Zhao X, Loh TP, Hu XH. Synergistic Copper-Aminocatalysis for Direct Tertiary α-Alkylation of Ketones with Electron-Deficient Alkanes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402255. [PMID: 38885363 DOI: 10.1002/advs.202402255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 05/17/2024] [Indexed: 06/20/2024]
Abstract
In this study, a novel approach for the tertiary α-alkylation of ketones using alkanes with electron-deficient C─H bonds is presented, employing a synergistic catalytic system combining inexpensive copper salts with aminocatalysis. This methodology addresses the limitations of traditional alkylation methods, such as the need for strong metallic bases, regioselectivity issues, and the risk of over alkylation, by providing a high reactivity and chemoselectivity without the necessity for pre-functionalized substrates. The dual catalytic strategy enables the direct functionalization of C(sp3)─H bonds, demonstrating remarkable selectivity in the presence of conventional C(sp3)─H bonds that are adjacent to heteroatoms or π systems, which are typically susceptible to single-electron transfer processes. The findings contribute to the advancement of alkylation techniques, offering a practical and efficient route for the construction of C(sp3)─C(sp3) bonds, and paving the way for further developments in the synthesis of complex organic molecules.
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Affiliation(s)
- Qi-Chao Shan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - You-Wei Wu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Mu-Xiang Chen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Xuefei Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Teck-Peng Loh
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology, 100 Lianhua Street, Zhengzhou, 450001, China
- Division of Chemistry and Biological Chemistry, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Xu-Hong Hu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
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3
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Sau S, Das KM, Mondal B, Thakur A. Cobalt(II)-Catalyzed Synthesis of γ-Diketones from Aryl Alkenes and Its Utilization in the Synthesis of Various Heterocyclic Compounds. J Org Chem 2024; 89:7095-7108. [PMID: 38701377 DOI: 10.1021/acs.joc.4c00487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
An earth-abundant Co(II) salt-catalyzed mild and affordable synthetic route has been developed for the synthesis of industrially relevant 1,4-dicarbonyl compounds (or γ-diketones) via oxidative coupling between aryl alkenes and ketones (both cyclic and acyclic) using TBHP and DBU as the oxidant and base, respectively. 1,4-Dicarbonyl compounds are known to be synthesized using expensive metal catalysts, dual catalysts, or low-cost metal complexes combined with an additive or ligand template, which further needs to be synthesized. Herein, we report the synthesis of 1,4-dicarbonyl compounds using cobalt(II) acetate as a catalyst without any expensive co-catalyst or ligand templates. This methodology has a broad substrate scope with significant yields and good functional group tolerance. Generation of unsymmetrical 1,4-dicarbonyls at room temperature and its versatile synthetic expansion to produce synthetically and biologically valuable heterocyclic compounds are salient features of this novel methodology. In addition, various controlled experiments such as primary kinetic isotope effect study, Hammett analysis with variation of the nature of the substituents on the styrene ring, and theoretical calculations (density functional theory) unravel the mechanistic intricacies involved in this new, simple, and atom-economic methodology.
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Affiliation(s)
- Subham Sau
- Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India
| | - Krishna Mohan Das
- Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India
| | - Bijan Mondal
- Institut für Anorganische Chemie, Universität Regensburg, Universität Strasse 31, 93040 Regensburg, Germany
| | - Arunabha Thakur
- Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India
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4
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Sar D, Yin S, Grygus J, Rentería-Gómez Á, Garcia M, Gutierrez O. Expanding the chemical space of enol silyl ethers: catalytic dicarbofunctionalization enabled by iron catalysis. Chem Sci 2023; 14:13007-13013. [PMID: 38023494 PMCID: PMC10664506 DOI: 10.1039/d3sc04549h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 10/19/2023] [Indexed: 12/01/2023] Open
Abstract
Enol silyl ethers are versatile, robust, and readily accessible substrates widely used in chemical synthesis. However, the conventional reactivity of these motifs has been limited to classical two electron (2-e) enolate-type chemistry with electrophilic partners or as radical acceptors in one electron (1-e) reactivity leading, in both cases, to exclusive α-monofunctionalization of carbonyls. Herein we describe a mild, fast, and operationally simple one-step protocol that combines readily available fluoroalkyl halides, silyl enol ethers, and, for the first time, hetero(aryl) Grignard reagents to promote selective dicarbofunctionalization of enol silyl ethers. From a broader perspective, this work expands the synthetic utility of enol silyl ethers and establishes bisphosphine-iron catalysis as enabling technology capable of orchestrating selective C-C bond formations with short-lived α-silyloxy radicals with practical implications towards sustainable chemical synthesis.
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Affiliation(s)
- Dinabandhu Sar
- Department of Chemistry, Texas A&M University College Station Texas 77843 USA
| | - Shuai Yin
- Department of Chemistry, Texas A&M University College Station Texas 77843 USA
| | - Jacob Grygus
- Department of Chemistry, Texas A&M University College Station Texas 77843 USA
| | | | - Melanie Garcia
- Department of Chemistry, Texas A&M University College Station Texas 77843 USA
| | - Osvaldo Gutierrez
- Department of Chemistry, Texas A&M University College Station Texas 77843 USA
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5
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Palani P, Arumugam A, Raja D, Muthu K, Senadi GC. Photoredox-catalyzed 1,2-oxo-alkylation of vinyl arenes with 1,3-diketones: an approach to 1,4-dicarbonyls via C-C activation. Chem Commun (Camb) 2023; 59:11433-11436. [PMID: 37671608 DOI: 10.1039/d3cc02366d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
A mild and inexpensive approach to synthesising a series of 1,4-diketones in moderate to excellent yields via 1,2-oxo alkylation has been developed using fluorescein as a photocatalyst and air as an oxidant. The key features include (i) varied substrate scope (39 examples); (ii) good functional group tolerance; (iii) unsymmetrical 1,4-dicarbonyls; (iv) late-stage functionalization of thymol and ibuprofen derivatives; and (v) the synthetic expansion to 5- and 6-membered N-, O- and S-containing heterocycles.
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Affiliation(s)
- Pushbaraj Palani
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
| | - Ajithkumar Arumugam
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
| | - Dineshkumar Raja
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
| | - Kesavan Muthu
- Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India
| | - Gopal Chandru Senadi
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
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6
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Mondal S, Chatterjee N, Maity S. Recent Developments on Photochemical Synthesis of 1,n-Dicarbonyls. Chemistry 2023; 29:e202301147. [PMID: 37335758 DOI: 10.1002/chem.202301147] [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: 04/11/2023] [Revised: 06/19/2023] [Accepted: 06/19/2023] [Indexed: 06/21/2023]
Abstract
1,n-dicarbonyls are one of the most fascinating chemical feedstocks finding abundant usage in the field of pharmaceuticals. Besides, they are utilized in a plethora of synthesis in general synthetic organic chemistry. A number of 'conventional' methods are available for their synthesis, such as the Stetter reaction, Baker-Venkatraman rearrangement, oxidation of vicinal diols, and oxidation of deoxybenzoins, synonymous with unfriendly reagents and conditions. In the last 15 years or so, photocatalysis has taken the world of synthetic organic chemistry by a remarkable renaissance. It is fair to say now that everybody loves the light and photoredox chemistry has opened a new gateway to organic chemists towards milder, more simpler alternatives to the previously available methods, allowing access to many sensitive reactions and products. In this review, we present the readers with the photochemical synthesis of a variety of 1,n-dicarbonyls. Diverse photocatalytic pathways to these fascinating molecules have been discussed, placing special emphasis on the mechanisms, giving the reader an opportunity to find all these significant developments in one place.
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Affiliation(s)
- Subhashis Mondal
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
| | - Nirbhik Chatterjee
- Department of Chemistry, Kanchrapara College, North 24 Parganas, 743145, West Bengal, India
| | - Soumitra Maity
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
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7
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Okuda S, Narita Y, Hayashi R, Sai M. Regio- and diastereoselective synthesis of unsymmetrical 1,4-diketone-derived ( Z)-monosilyl enol ethers via siloxyallylpotassium intermediates. Chem Commun (Camb) 2023; 59:2939-2942. [PMID: 36799249 DOI: 10.1039/d2cc07097a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
This paper describes the regio- and diastereoselective synthesis of unsymmetrical 1,4-diketone-derived (Z)-monosilyl enol ethers from 1-arylallyloxysilanes and Weinreb amides using (trimethylsilyl)methylpotassium as a base. The metalation of 1-arylallyloxysilanes to generate siloxyallylpotassiums is the key step in this transformation. The products can be transformed into diverse α-monofunctionalized unsymmetrical 1,4-diketones.
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Affiliation(s)
- Shuto Okuda
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Yutaka Narita
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Rikuo Hayashi
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
| | - Masahiro Sai
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
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8
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Takeshima A, Kano T. Diethylzinc-Mediated Cross-Coupling Reactions between Dibromoketones and Monobromo Carbonyl Compounds. Angew Chem Int Ed Engl 2023; 62:e202217496. [PMID: 36583678 DOI: 10.1002/anie.202217496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/29/2022] [Accepted: 12/30/2022] [Indexed: 12/31/2022]
Abstract
A novel route to synthesize 1,4-dicarbonyl compounds is described. α,α-Dibromoketones generate zinc enolates through a diethylzinc-mediated halogen-metal exchange and react with α-bromocarbonyl compounds to furnish 1,4-dicarbonyl compounds via a second generation of zinc enolates. This cross-coupling reaction is enabled by the chemoselective formation of zinc enolates from α,α-dibromoketones in the presence of α-bromocarbonyl compounds. Chiral 1,4-dicarbonyl compounds can be obtained via the enantioselective bromination of aldehydes using a chiral secondary amine catalyst and a subsequent cross-coupling reaction between the resulting chiral α-bromoaldehydes and α,α-dibromoacetophenones.
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Affiliation(s)
- Aika Takeshima
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo, 184-8588, Japan.,Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Taichi Kano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo, 184-8588, Japan
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9
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Xu L, Liu X, Alvey GR, Shatskiy A, Liu JQ, Kärkäs MD, Wang XS. Silver-Catalyzed Controlled Intermolecular Cross-Coupling of Silyl Enol Ethers: Scalable Access to 1,4-Diketones. Org Lett 2022; 24:4513-4518. [PMID: 35713416 PMCID: PMC9536665 DOI: 10.1021/acs.orglett.2c01477] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
![]()
A protocol
for silver-catalyzed controlled intermolecular cross-coupling
of silyl enolates is disclosed. The protocol displays good functional
group tolerance and allows efficient preparation of a series of synthetically
useful 1,4-diketones. Preliminary mechanistic investigations suggest
that the reaction proceeds through a one-electron process involving
free radical species in which PhBr acts as the oxidant.
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Affiliation(s)
- Li Xu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Xiaoyi Liu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Gregory R Alvey
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Andrey Shatskiy
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Jian-Quan Liu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China.,Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Markus D Kärkäs
- Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Xiang-Shan Wang
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
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10
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Shibata S, Kamata K, Hara M. Stability enhancement of iron‐based perovskite catalysts by A‐site substitution for oxidative transposition of α‐bromostyrene to phenacyl bromide. ChemCatChem 2022. [DOI: 10.1002/cctc.202200395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Satomi Shibata
- Tokyo Institute of Technology: Tokyo Kogyo Daigaku Laboratory for Materials and Structures, Institute of Innovative Research JAPAN
| | - Keigo Kamata
- Tokyo Institute of Technology Materials and Structures Laboratory Nagatsuta-cho 4259, Midori-ku 226-8503 Yokohama-city, Kanagawa JAPAN
| | - Michikazu Hara
- Tokyo Institute of Technology: Tokyo Kogyo Daigaku Laboratory for Materials and Structures, Institute of Innovative Research JAPAN
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11
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Li HH, Zhang JY, Li S, Wang YB, Cheng JK, Xiang SH, Tan B. Asymmetric synthesis of binaphthyls through photocatalytic cross-coupling and organocatalytic kinetic resolution. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1246-8] [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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12
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Ren L, Luo J, Tan L, Tang Q. Titanium-Mediated Domino Cross-Coupling/Cyclodehydration and Aldol-Addition/Cyclocondensation: Concise and Regioselective Synthesis of Polysubstituted and Fused Furans. J Org Chem 2022; 87:3167-3176. [PMID: 35133828 DOI: 10.1021/acs.joc.1c02894] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Titanium enolates, in situ-generated from readily available ketones and titanium tetraisopropoxide, undergo domino cross-coupling/cyclodehydration or domino Aldol-addition/cyclocondensation with α-chloroketones to provide synthetically valuable furan derivatives. The domino process tolerates a variety of cyclic and acyclic ketones and chloroketones, producing polysubstituted furans and bi-, tri-, and tetracyclic fused furans.
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Affiliation(s)
- Lu Ren
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
| | - Juan Luo
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
| | - Linbo Tan
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
| | - Qiang Tang
- College of Pharmacy, Center for Lab Teaching and Management, Chongqing Medical University, No. 1 Yixueyuan Road, Chongqing 400016, PR China
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13
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Xu SH, Yan DM, Rao L, Jiang M, Wu YL, Xiao WJ, Chen JR. Photocatalytic selective 1,2-hydroxyacylmethylation of 1,3-dienes with sulfur ylides as source of alkyl radicals. Org Chem Front 2022. [DOI: 10.1039/d2qo00383j] [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
Exploration of the zwitterionic property of sulfur ylides has long been known as a flexible strategy in a wide range of chemical transformations for different ring-sized construction. By contrast, their...
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14
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Wang JX, Ge W, Xing WL, Fu MC. Photoinduced Deaminative Alkylation for the Synthesis of γ-Ketoesters via Electron Donor-Acceptor Complex Formation. J Org Chem 2021; 86:18224-18231. [PMID: 34846880 DOI: 10.1021/acs.joc.1c02499] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Visible-light-induced deaminative alkylation of Katritzky salts with silyl enol ethers has been developed. The reaction can proceed efficiently through electron donor-acceptor complex formation, avoiding the use of precious metal complexes or synthetically elaborate organic dyes. A series of functionalized γ-ketoesters was successfully obtained with good functional group tolerance and compatibility under mild and straightforward conditions.
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Affiliation(s)
- Jia-Xin Wang
- Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China
| | - Wei Ge
- Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China
| | - Wei-Long Xing
- Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China
| | - Ming-Chen Fu
- Anhui Province Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China
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15
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Moorey AR, Cabanillas A, Batt SM, Ghidelli-Disse S, Urones B, Sanz O, Lelievre J, Bantscheff M, Cox LR, Besra GS. The multi-target aspect of an MmpL3 inhibitor: The BM212 series of compounds bind EthR2, a transcriptional regulator of ethionamide activation. Cell Surf 2021; 7:100068. [PMID: 34888432 PMCID: PMC8634040 DOI: 10.1016/j.tcsw.2021.100068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 12/12/2022] Open
Abstract
The emergence of drug-resistant strains of Mycobacterium tuberculosis (Mtb) ensures that drug discovery efforts remain at the forefront of TB research. There are multiple different experimental approaches that can be employed in the discovery of anti-TB agents. Notably, inhibitors of MmpL3 are numerous and structurally diverse in Mtb and have been discovered through the generation of spontaneous resistant mutants and subsequent whole genome sequencing studies. However, this approach is not always reliable and can lead to incorrect target assignment and requires orthogonal confirmatory approaches. In fact, many of these inhibitors have also been shown to act as multi-target agents, with secondary targets in Mtb, as well as in other non-MmpL3-containing pathogens. Herein, we have investigated further the cellular targets of the MmpL3-inhibitor BM212 and a number of BM212 analogues. To determine the alternative targets of BM212, which may have been masked by MmpL3 mutations, we have applied a combination of chemo-proteomic profiling using bead-immobilised BM212 derivatives and protein extracts, along with whole-cell and biochemical assays. The study identified EthR2 (Rv0078) as a protein that binds BM212 analogues. We further demonstrated binding of BM212 to EthR2 through an in vitro tryptophan fluorescence assay, which showed significant quenching of tryptophan fluorescence upon addition of BM212. Our studies have demonstrated the value of revisiting drugs with ambiguous targets, such as MmpL3, in an attempt to find alternative targets and the study of off-target effects to understand more precisely target engagement of new hits emerging from drug screening campaigns.
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Affiliation(s)
- Alice R Moorey
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham B15 2TT, U.K
| | - Alejandro Cabanillas
- Diseases of the Developing World, GlaxoSmithKline, Severo Ochoa 2, Tres Cantos, Madrid 28760, Spain
| | - Sarah M Batt
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham B15 2TT, U.K
| | | | - Beatriz Urones
- Diseases of the Developing World, GlaxoSmithKline, Severo Ochoa 2, Tres Cantos, Madrid 28760, Spain
| | - Olalla Sanz
- Diseases of the Developing World, GlaxoSmithKline, Severo Ochoa 2, Tres Cantos, Madrid 28760, Spain
| | - Joel Lelievre
- Diseases of the Developing World, GlaxoSmithKline, Severo Ochoa 2, Tres Cantos, Madrid 28760, Spain
| | - Marcus Bantscheff
- Cellzome - a GSK Company, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Liam R Cox
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Gurdyal S Besra
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham B15 2TT, U.K
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16
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Das S, Mandal T, De Sarkar S. Acridine Orange Hemi(Zinc Chloride) Salt as a Lewis Acid‐Photoredox Hybrid Catalyst for the Generation of
α
‐Carbonyl Radicals. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sanju Das
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur 741246 West Bengal India
| | - Tanumoy Mandal
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur 741246 West Bengal India
| | - Suman De Sarkar
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur 741246 West Bengal India
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17
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Pearl ES, Fellner DMJ, Söhnel T, Furkert DP, Brimble MA. A Highly Efficient
N
‐Mesityl Thiazolylidene for the Aliphatic Stetter Reaction: Stereoelectronic Quantification for Comparison of N‐Heterocyclic Carbene Organocatalysts. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Esperanza S. Pearl
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
| | - Daniel M. J. Fellner
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
| | - Tilo Söhnel
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
| | - Daniel P. Furkert
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery 3 Symonds St Auckland 1010 New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences The University of Auckland 23 Symonds St Auckland 1010 New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery 3 Symonds St Auckland 1010 New Zealand
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18
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Sowaileh MF, Alshammari MD, Colby DA. Synthesis of Difluorinated Halohydrins by the Chemoselective Addition of Difluoroenolates to α-Haloketones. Org Lett 2021; 23:5098-5101. [PMID: 34124917 DOI: 10.1021/acs.orglett.1c01636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
α-Haloketones are valuable intermediates in the synthesis of pharmaceuticals and natural products because they display two electrophiles. Although chemoselective additions to each of these functional groups are known, the use of fluorinated nucleophiles has not been characterized, except for the dimerization of fluorohalomethyl ketones. Our studies demonstrate the use of difluoroenolates to create difluorinated bromohydrins and chlorohydrins from α-haloketones without any cyclization or rearrangement due to the mild conditions.
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Affiliation(s)
- Munia F Sowaileh
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
| | - Maali D Alshammari
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
| | - David A Colby
- Department of BioMolecular Sciences, University of Mississippi, University, Mississippi 38677, United States
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19
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Kurose A, Ishida Y, Hirata G, Nishikata T. Direct α‐Tertiary Alkylations of Ketones in a Combined Copper–Organocatalyst System. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ayako Kurose
- Graduate School of Science and Engineering Yamaguchi University 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
| | - Yuto Ishida
- Graduate School of Science and Engineering Yamaguchi University 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
| | - Goki Hirata
- Graduate School of Science and Engineering Yamaguchi University 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering Yamaguchi University 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
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20
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Kurose A, Ishida Y, Hirata G, Nishikata T. Direct α-Tertiary Alkylations of Ketones in a Combined Copper-Organocatalyst System. Angew Chem Int Ed Engl 2021; 60:10620-10625. [PMID: 33826789 DOI: 10.1002/anie.202016051] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Indexed: 11/07/2022]
Abstract
Herein, we report an efficient method for the tertiary alkylation of a ketone by using an α-bromocarbonyl compound as the tertiary alkyl source in a combined Cu-organocatalyst system. This dual catalyst system enables the addition of a tertiary alkyl radical to an enamine. Mechanistic studies revealed that the catalytically generated enamine is a key intermediate in the catalytic cycle. The developed method can be used to synthesize substituted 1,4-dicarbonyl compounds containing quaternary carbons bearing various alkyl chains.
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Affiliation(s)
- Ayako Kurose
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Yuto Ishida
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Goki Hirata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
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21
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Ye W, Stevens CM, Wen P, Simmons CJ, Tang W. Mild Cu(OTf) 2-Mediated C-Glycosylation with Chelation-Assisted Picolinate as a Leaving Group. J Org Chem 2020; 85:16218-16225. [PMID: 32691596 PMCID: PMC8138965 DOI: 10.1021/acs.joc.0c01041] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
C-Glycosylation reactions of glycosyl picolinates with allyltrimethylsilane or silyl enol ethers were developed. Picolinate as a chelation-assisted leaving group could be activated by Cu(OTf)2 and avoided the use of harsh Lewis acids. The glycosylations were operated under mild neutral conditions and gave the corresponding C-glycosides in up to 95% yield with moderate to excellent stereoselectivities.
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Affiliation(s)
- Wenjing Ye
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Christopher M Stevens
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Peng Wen
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Christopher J Simmons
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Weiping Tang
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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22
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23
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Roy Chowdhury S, Singh D, Hoque IU, Maity S. Organic Dye-Catalyzed Intermolecular Radical Coupling of α-Bromocarbonyls with Olefins: Photocatalytic Synthesis of 1,4-Ketocarbonyls Using Air as an Oxidant. J Org Chem 2020; 85:13939-13950. [DOI: 10.1021/acs.joc.0c01985] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Deepak Singh
- Department of Chemistry, Indian Institute of Technology (ISM) Dhanbad, JH 826004, India
| | - Injamam Ul Hoque
- Department of Chemistry, Indian Institute of Technology (ISM) Dhanbad, JH 826004, India
| | - Soumitra Maity
- Department of Chemistry, Indian Institute of Technology (ISM) Dhanbad, JH 826004, India
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24
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Liu Q, Wang R, Song H, Liu Y, Wang Q. Synthesis of 1,4‐Dicarbonyl Compounds by Visible‐Light‐Mediated Cross‐Coupling Reactions of α‐Chlorocarbonyls and Enol Acetates. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000791] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Rui‐Guo Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Hong‐Jian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Yu‐Xiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
| | - Qing‐Min Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry Nankai University Tianjin 300071 People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin Tianjin 300071 People's Republic of China
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25
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Zanatta N, Marangoni MA, Moraes PA, Camargo AF, Bonacorso HG, Martins MAP. Synthesis of a Novel 1,4-Dicarbonyl Scaffold – Ethyl 3-Formyl-4,5-dihydrofuran-2-carboxylate – and Its Application to the Synthesis of Pyridazines. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0039-1690886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The 1,4-dicarbonyl scaffold ethyl 3-formyl-4,5-dihydrofuran-2-carboxylate was obtained through the rearrangement of the parent ethyl 2-(4,5-dihydrofuran-3-yl)-2-oxoacetate and applied to the synthesis of a series of 7-alkoxy-2,3-dihydrofuro[2,3-d]pyridazines. Twelve pyridazines were obtained in yields of up to 70%.
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Affiliation(s)
- Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria
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26
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Lima S, Coelho F. Synthesis of 1,4,6-Tricarbonyl Compounds via Regioselective Gold(I)-Catalyzed Alkyne Hydration and Their Application in the Synthesis of α-Arylidene-butyrolactones. ACS OMEGA 2020; 5:8032-8045. [PMID: 32309713 PMCID: PMC7161055 DOI: 10.1021/acsomega.0c00101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/20/2020] [Indexed: 05/05/2023]
Abstract
We report a direct, straightforward, and regioselective hydration of 1,4-enynes designed from Morita-Baylis-Hillman adducts. Under smooth conditions and short reaction times, gold-catalyzed hydration of internal alkynes provides synthetically useful ketones as single regioisomers in yields higher than 90%. The synthetic usefulness of this protocol was demonstrated by the conversion of selected ketones into biologically valuable α-alkylidene-γ-lactones upon reduction with sodium borohydride. In the course of the scope evaluation, we discovered that this methodology could also furnish α-arylidene-β,γ-butenolides.
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Affiliation(s)
- Samia
R. Lima
- Institute of Chemistry—Laboratory
of Synthesis of Natural Products and Drugs, University of Campinas, P.O. Box 6154, 13083-970 Campinas, São
Paulo, Brazil
| | - Fernando Coelho
- Institute of Chemistry—Laboratory
of Synthesis of Natural Products and Drugs, University of Campinas, P.O. Box 6154, 13083-970 Campinas, São
Paulo, Brazil
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27
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Spinnato D, Schweitzer-Chaput B, Goti G, Ošeka M, Melchiorre P. A Photochemical Organocatalytic Strategy for the α-Alkylation of Ketones by using Radicals. Angew Chem Int Ed Engl 2020; 59:9485-9490. [PMID: 32053279 PMCID: PMC7317845 DOI: 10.1002/anie.201915814] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Indexed: 12/16/2022]
Abstract
Reported herein is a visible‐light‐mediated radical approach to the α‐alkylation of ketones. This method exploits the ability of a nucleophilic organocatalyst to generate radicals upon SN2‐based activation of alkyl halides and blue light irradiation. The resulting open‐shell intermediates are then intercepted by weakly nucleophilic silyl enol ethers, which would be unable to directly attack the alkyl halides through a traditional two‐electron path. The mild reaction conditions allowed functionalization of the α position of ketones with functional groups that are not compatible with classical anionic strategies. In addition, the redox‐neutral nature of this process makes it compatible with a cinchona‐based primary amine catalyst, which was used to develop a rare example of enantioselective organocatalytic radical α‐alkylation of ketones.
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Affiliation(s)
- Davide Spinnato
- ICIQ-Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona, Spain
| | - Bertrand Schweitzer-Chaput
- ICIQ-Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona, Spain
| | - Giulio Goti
- ICIQ-Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona, Spain
| | - Maksim Ošeka
- ICIQ-Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona, Spain
| | - Paolo Melchiorre
- ICIQ-Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona, Spain.,ICREA, Passeig Lluís Companys 23, 08010, Barcelona, Spain
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28
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Spinnato D, Schweitzer‐Chaput B, Goti G, Ošeka M, Melchiorre P. A Photochemical Organocatalytic Strategy for the α‐Alkylation of Ketones by using Radicals. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915814] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Davide Spinnato
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Bertrand Schweitzer‐Chaput
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Giulio Goti
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Maksim Ošeka
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Paolo Melchiorre
- ICIQ—Institute of Chemical Research of Catalonia the Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
- ICREA Passeig Lluís Companys 23 08010 Barcelona Spain
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29
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Fantinati A, Zanirato V, Marchetti P, Trapella C. The Fascinating Chemistry of α-Haloamides. ChemistryOpen 2020; 9:100-170. [PMID: 32025460 PMCID: PMC6996577 DOI: 10.1002/open.201900220] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 11/19/2019] [Indexed: 12/17/2022] Open
Abstract
The aim of this review is to highlight the rich chemistry of α-haloamides originally mainly used to discover new C-N, C-O and C-S bond forming reactions, and later widely employed in C-C cross-coupling reactions with C(sp3), C(sp2) and C(sp) coupling partners. Radical-mediated transformations of α-haloamides bearing a suitable located unsaturated bond has proven to be a straightforward alternative to access diverse cyclic compounds by means of either radical initiators, transition metal redox catalysis or visible light photoredox catalysis. On the other hand, cycloadditions with α-halohydroxamate-based azaoxyallyl cations have garnered significant attention. Moreover, in view of the important role in life and materials science of difluoroalkylated compounds, a wide range of catalysts has been developed for the efficient incorporation of difluoroacetamido moieties into activated as well as unactivated substrates.
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Affiliation(s)
- Anna Fantinati
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Vinicio Zanirato
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Paolo Marchetti
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Claudio Trapella
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
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30
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Zemtsov AA, Ashirbaev SS, Levin VV, Kokorekin VA, Korlyukov AA, Dilman AD. Photoredox Reaction of 2-Mercaptothiazolinium Salts with Silyl Enol Ethers. J Org Chem 2019; 84:15745-15753. [PMID: 31693367 DOI: 10.1021/acs.joc.9b02478] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A method for the generation of free radicals from thiazolinium salts upon photocatalytic reduction is described. The thiazolinium salts are generated by treatment with methyl triflate of 2-mercaptothiazolines, which can be readily obtained from alkyl bromides and tosylates via a nucleophilic substitution reaction or by hydrothiolation of alkenes. Silyl enol ethers were used to trap the radicals, furnishing ketones after successive single-electron oxidation and elimination of the silyl cation.
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Affiliation(s)
- Artem A Zemtsov
- N. D. Zelinsky Institute of Organic Chemistry , Leninsky prosp. 47 , 119991 Moscow , Russian Federation
| | - Salavat S Ashirbaev
- N. D. Zelinsky Institute of Organic Chemistry , Leninsky prosp. 47 , 119991 Moscow , Russian Federation
| | - Vitalij V Levin
- N. D. Zelinsky Institute of Organic Chemistry , Leninsky prosp. 47 , 119991 Moscow , Russian Federation
| | - Vladimir A Kokorekin
- N. D. Zelinsky Institute of Organic Chemistry , Leninsky prosp. 47 , 119991 Moscow , Russian Federation.,Sechenov First Moscow State Medical University , Trubetskaya st. 8-2 , 119991 Moscow , Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds , Vavilov str. 28 , 119991 Moscow , Russian Federation.,N. I. Pirogov Russian National Research Medical University , Ostrovitianov str. 1 , 117997 Moscow , Russian Federation
| | - Alexander D Dilman
- N. D. Zelinsky Institute of Organic Chemistry , Leninsky prosp. 47 , 119991 Moscow , Russian Federation
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31
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Hachiya I, Nakamura K, Hara M, Sato K, Shimizu M. Domino 1,4- and 1,6-Addition Reactions of Ketene Silyl Acetals to Dialkynyl Imines Promoted by Aluminum Chloride: Synthesis of Multifunctionalized β-Lactams. J Org Chem 2019; 84:14770-14794. [PMID: 31670955 DOI: 10.1021/acs.joc.9b02364] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Domino 1,4- and 1,6-addition reactions of ketene silyl acetals to dialkynyl imines are disclosed. Aluminum chloride promoted domino 1,4- and 1,6-addition reactions of ketene silyl acetals to dialkynyl imines to give a variety of alkenyl iminocyclobutenones in moderate to good yields. The chemoselective reduction of alkenyl iminocyclobutenones and the subsequent thermal rearrangement of resulting alkenyl aminocyclobutenones in the presence of appropriate amines provided cis or trans multifunctionalized β-lactams in moderate to high yields with good to high diastereoselectivities.
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Affiliation(s)
- Iwao Hachiya
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu Mie 514-8507 , Japan
| | - Kenta Nakamura
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu Mie 514-8507 , Japan
| | - Masaya Hara
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu Mie 514-8507 , Japan
| | - Koki Sato
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu Mie 514-8507 , Japan
| | - Makoto Shimizu
- Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu Mie 514-8507 , Japan.,School of Energy Science and Engineering , Nanjing Tech University , Nanjing , 211816 Jiangsu , China
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32
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Zhao P, Wu X, Zhou Y, Geng X, Wang C, Wu YD, Wu AX. Direct Synthesis of 2,3-Diaroyl Quinolines and Pyridazino[4,5-b]quinolines via an I2-Promoted One-Pot Multicomponent Reaction. Org Lett 2019; 21:2708-2711. [DOI: 10.1021/acs.orglett.9b00685] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Peng Zhao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Xia Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - You Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Xiao Geng
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Can Wang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yan-dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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33
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Li Y, Shang JQ, Wang XX, Xia WJ, Yang T, Xin Y, Li YM. Copper-Catalyzed Decarboxylative Oxyalkylation of Alkynyl Carboxylic Acids: Synthesis of γ-Diketones and γ-Ketonitriles. Org Lett 2019; 21:2227-2230. [DOI: 10.1021/acs.orglett.9b00520] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yi Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P.R. China
| | - Jia-Qi Shang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P.R. China
| | - Xiang-Xiang Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P.R. China
| | - Wen-Jin Xia
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P.R. China
| | - Tao Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P.R. China
| | - Yangchun Xin
- Katzin Diagnostic & Research PET/MR Center, Nemours/Alfred I. DuPont Hospital for Children, Wilmington, Delaware 19803, United States
| | - Ya-Min Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P.R. China
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34
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Anselmo M, Basso A, Protti S, Ravelli D. Photoredox-Catalyzed Generation of Acetonyl Radical in Flow: Theoretical Investigation and Synthetic Applications. ACS Catal 2019. [DOI: 10.1021/acscatal.8b03875] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Manuel Anselmo
- Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16100 Genova, Italy
| | - Andrea Basso
- Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16100 Genova, Italy
| | - Stefano Protti
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Davide Ravelli
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
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35
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Chen W, Guo R, Yang Z, Gong J. Formal Total Synthesis of Hybocarpone Enabled by Visible-Light-Promoted Benzannulation. J Org Chem 2018; 83:15524-15532. [PMID: 30484314 DOI: 10.1021/acs.joc.8b02595] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The formal total synthesis of hybocarpone was achieved in eight steps from commercially available 1,2,4-trimethoxybenzene. Key transformations include a visible-light-promoted benzannulation to construct the key α-naphthol intermediate and a modified CAN-mediated dimerization/hydration cascade sequence to generate the vicinal all-carbon quaternary centers in a stereocontrolled manner. The total synthesis of boryquinone was also achieved in seven steps.
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Affiliation(s)
- Wei Chen
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics , Peking University Shenzhen Graduate School , Shenzhen 518055 , China
| | - Renyu Guo
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics , Peking University Shenzhen Graduate School , Shenzhen 518055 , China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics , Peking University Shenzhen Graduate School , Shenzhen 518055 , China.,Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS), and Peking-Tsinghua Center for Life Sciences , Peking University , Beijing 100871 , China
| | - Jianxian Gong
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics , Peking University Shenzhen Graduate School , Shenzhen 518055 , China
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36
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Miura T, Funakoshi Y, Nakahashi J, Moriyama D, Murakami M. Synthesis of Elongated Esters from Alkenes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University Katsura Kyoto 615-8510 Japan
| | - Yuuta Funakoshi
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University Katsura Kyoto 615-8510 Japan
| | - Junki Nakahashi
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University Katsura Kyoto 615-8510 Japan
| | - Daisuke Moriyama
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University Katsura Kyoto 615-8510 Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry Kyoto University Katsura Kyoto 615-8510 Japan
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37
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Miura T, Funakoshi Y, Nakahashi J, Moriyama D, Murakami M. Synthesis of Elongated Esters from Alkenes. Angew Chem Int Ed Engl 2018; 57:15455-15459. [PMID: 30264919 DOI: 10.1002/anie.201809115] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/07/2018] [Indexed: 12/30/2022]
Abstract
A convenient method for synthesizing elongated aliphatic esters from alkenes is reported. An (alkoxycarbonyl)methyl radical species is generated upon visible-light irradiation of an ester-stabilized phosphorus ylide in the presence of a photoredox catalyst. This radical species adds onto the carbon-carbon double bond of an alkene to produce an elongated aliphatic ester.
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Affiliation(s)
- Tomoya Miura
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Yuuta Funakoshi
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Junki Nakahashi
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Daisuke Moriyama
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto, 615-8510, Japan
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38
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Speckmeier E, Fuchs PJW, Zeitler K. A synergistic LUMO lowering strategy using Lewis acid catalysis in water to enable photoredox catalytic, functionalizing C-C cross-coupling of styrenes. Chem Sci 2018; 9:7096-7103. [PMID: 30310630 PMCID: PMC6137453 DOI: 10.1039/c8sc02106f] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 07/17/2018] [Indexed: 12/12/2022] Open
Abstract
Easily available α-carbonyl acetates serve as convenient alkyl radical source for an efficient, photocatalytic cross-coupling with a great variety of styrenes. Activation of electronically different α-acetylated acetophenone derivatives could be effected via LUMO lowering catalysis using a superior, synergistic combination of water and (water-compatible) Lewis acids. Deliberate application of fac-Ir(ppy)3 as photocatalyst to enforce an oxidative quenching cycle is crucial to the success of this (umpolung type) transformation. Mechanistic particulars of this dual catalytic coupling reaction have been studied in detail using both Stern-Volmer and cyclic voltammetry experiments. As demonstrated in more than 30 examples, our water-assisted LA/photoredox catalytic activation strategy allows for excess-free, equimolar radical cross-coupling and subsequent formal Markovnikov hydroxylation to versatile 1,4-difunctionalized products in good to excellent yields.
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Affiliation(s)
- Elisabeth Speckmeier
- Institut für Organische Chemie , Universität Leipzig , Johannisallee 29 , D-04103 Leipzig , Germany .
| | - Patrick J W Fuchs
- Institut für Organische Chemie , Universität Leipzig , Johannisallee 29 , D-04103 Leipzig , Germany .
| | - Kirsten Zeitler
- Institut für Organische Chemie , Universität Leipzig , Johannisallee 29 , D-04103 Leipzig , Germany .
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39
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Ma M, Hao W, Ma L, Zheng Y, Lian P, Wan X. Interception of Radicals by Molecular Oxygen and Diazo Compounds: Direct Synthesis of Oxalate Esters Using Visible-Light Catalysis. Org Lett 2018; 20:5799-5802. [DOI: 10.1021/acs.orglett.8b02487] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Meihua Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Weiwei Hao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Liang Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yonggao Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Pengcheng Lian
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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40
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Ouyang XH, Song RJ, Li JH. Developments in the Chemistry of α-Carbonyl Alkyl Bromides. Chem Asian J 2018; 13:2316-2332. [DOI: 10.1002/asia.201800630] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/01/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Xuan-Hui Ouyang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
- State Key Laboratory of Chemo/Biosensing and Chemometrics; Hunan University; Changsha 410082 China
| | - Ren-Jie Song
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle; Nanchang Hangkong University; Nanchang 330063 China
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41
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Deguchi M, Fujiya A, Yamaguchi E, Tada N, Uno B, Itoh A. Organic dye-catalyzed radical ring expansion reaction. RSC Adv 2018; 8:15825-15830. [PMID: 35539500 PMCID: PMC9080073 DOI: 10.1039/c8ra02383b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 04/23/2018] [Indexed: 12/03/2022] Open
Abstract
Herein, we reported an attractive method for synthesizing medium-sized rings that are catalyzed by erythrosine B under fluorescent light irradiation. This synthetic approach featured mild conditions, a facile procedure, a broad substrate scope, and moderate-to-good yields. Herein, we reported an attractive method for synthesizing medium-sized rings that are catalyzed by erythrosine B under fluorescent light irradiation.![]()
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Affiliation(s)
- Masato Deguchi
- Gifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Akitoshi Fujiya
- Gifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Eiji Yamaguchi
- Gifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Norihiro Tada
- Gifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Bunji Uno
- Gifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Akichika Itoh
- Gifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
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42
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Zhang X, Qin J, Huang X, Meggers E. One-Pot Sequential Photoredox Chemistry and Asymmetric Transfer Hydrogenation with a Single Catalyst. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701652] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xiao Zhang
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Jie Qin
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Xiaoqiang Huang
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
| | - Eric Meggers
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 4 35043 Marburg Germany
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43
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Esumi N, Suzuki K, Nishimoto Y, Yasuda M. Generation of α-Iminyl Radicals from α-Bromo Cyclic N
-Sulfonylimines and Application to Coupling with Various Radical Acceptors Using a Photoredox Catalyst. Chemistry 2017; 24:312-316. [DOI: 10.1002/chem.201704060] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Naoto Esumi
- Department of Applied Chemistry, Graduate School of Engineering; Osaka University; 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
| | - Kensuke Suzuki
- Department of Applied Chemistry, Graduate School of Engineering; Osaka University; 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
| | - Yoshihiro Nishimoto
- Frontier Research Base for Global Young Researchers Center for Open Innovation Research and Education (COiRE), Graduate School of Engineering; Osaka University; 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering; Osaka University; 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
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44
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Tang SZ, Zhao W, Chen T, Liu Y, Zhang XM, Zhang FM. A Simple and Efficient Method for the Preparation of α-Halogenated Ketones Using Iron(III) Chloride and Iron(III) Bromide as Halogen Sources with Phenyliodonium Diacetate as Oxidant. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700833] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Shi-Zhong Tang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Wenshuang Zhao
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Tao Chen
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Yang Liu
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry; Lanzhou University; Lanzhou 730000 People's Republic of China
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy; Sichuan University; Chengdu 610041 People's Republic of China
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45
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Gomes RC, Barcelos RC, Rodrigues MT, Santos H, Coelho F. Intermolecular Stetter Reactions on Morita-Baylis-Hillman Adducts: an Approach to Highly Functionalized 1,4-Dicarbonyl Compounds. ChemistrySelect 2017. [DOI: 10.1002/slct.201602059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ralph C. Gomes
- Laboratory of Synthesis of Natural Products and Drugs; UNICAMP; Institute of Chemistry, PO Box; 6154, 13083-970 Campinas, SP Brazil
| | - Rosimeire C. Barcelos
- Laboratory of Synthesis of Natural Products and Drugs; UNICAMP; Institute of Chemistry, PO Box; 6154, 13083-970 Campinas, SP Brazil
| | - Manoel T. Rodrigues
- Laboratory of Synthesis of Natural Products and Drugs; UNICAMP; Institute of Chemistry, PO Box; 6154, 13083-970 Campinas, SP Brazil
| | - Hugo Santos
- Laboratory of Synthesis of Natural Products and Drugs; UNICAMP; Institute of Chemistry, PO Box; 6154, 13083-970 Campinas, SP Brazil
| | - Fernando Coelho
- Laboratory of Synthesis of Natural Products and Drugs; UNICAMP; Institute of Chemistry, PO Box; 6154, 13083-970 Campinas, SP Brazil
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46
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Li Y, Lu Y, Mao R, Li Z, Wu J. A photoinduced reaction of perfluoroalkyl halides with 1,3-diarylprop-2-yn-1-ones catalyzed by DABSO. Org Chem Front 2017. [DOI: 10.1039/c7qo00279c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The sulfur dioxide surrogate of DABCO·(SO2)2 is used as an efficient catalyst for the cleavage of the perfluoroalkyl-halogen bond under visible-light irradiation. A plausible mechanism supported by theoretical calculations is proposed.
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Affiliation(s)
- Yuewen Li
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Yiye Lu
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Runyu Mao
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Zhiming Li
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
| | - Jie Wu
- Department of Chemistry
- Fudan University
- Shanghai 200433
- China
- State Key Laboratory of Organometallic Chemistry
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47
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Franchino A, Rinaldi A, Dixon DJ. α-Alkylation of ketimines using visible light photoredox catalysis. RSC Adv 2017. [DOI: 10.1039/c7ra09248b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel α-alkylation of N-diphenylphosphinoyl ketimines with α-bromocarbonyl compounds has been accomplished under mild conditions using nickel and ruthenium light-promoted catalysis.
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Affiliation(s)
- Allegra Franchino
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Antonia Rinaldi
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Darren J. Dixon
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
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48
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Wang AF, Zhou P, Zhu YL, Hao WJ, Li G, Tu SJ, Jiang B. Metal-free benzannulation of 1,7-diynes towards unexpected 1-aroyl-2-naphthaldehydes and their application in fused aza-heterocyclic synthesis. Chem Commun (Camb) 2017; 53:3369-3372. [DOI: 10.1039/c7cc00323d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A novel I2-mediated benzannulation of 1,7-diyne-involved 1,4-oxo-migration was established, providing unexpected 1-aroyl-2-naphthaldehydes. The resulting 1-aroyl-2-naphthaldehydes were successfully applied in the synthesis of polycyclic isoindoles.
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Affiliation(s)
- Ai-Fang Wang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Peng Zhou
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yi-Long Zhu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Wen-Juan Hao
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Guigen Li
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
| | - Shu-Jiang Tu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Bo Jiang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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