1
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Faure C, Benmaouche S, Belmont P, Brachet E, Lamaa D. N-H Insertion of Anilines on N-Tosylhydrazones Induced by Visible Light Irradiation. J Org Chem 2024. [PMID: 39056462 DOI: 10.1021/acs.joc.4c01317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
Diazo compounds and their precursors represent an interesting chemical category for organic synthesis. Particularly, N-tosylhydrazones have attracted attention for their easy accessibility and diverse reactivity, including carbene transfer reactions. We described a visible light-induced N-H insertion reaction of anilines on in situ-generated diazo compounds. Optimal conditions using DBU in toluene efficiently yielded the desired products. Mechanistic studies enabled us to trap a carbene intermediate that plays a key role in the transformation.
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Affiliation(s)
- Clara Faure
- Université Paris Cité, UMR 8038 CNRS, Faculté de Pharmacie, F-75006 Paris, France
| | - Salim Benmaouche
- Université Paris Cité, UMR 8038 CNRS, Faculté de Pharmacie, F-75006 Paris, France
| | - Philippe Belmont
- Université Paris Cité, UMR 8038 CNRS, Faculté de Pharmacie, F-75006 Paris, France
| | - Etienne Brachet
- Université Paris Cité, UMR 8038 CNRS, Faculté de Pharmacie, F-75006 Paris, France
| | - Diana Lamaa
- Université Paris Cité, UMR 8038 CNRS, Faculté de Pharmacie, F-75006 Paris, France
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2
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Staronova L, Yamazaki K, Xu X, Shi H, Bickelhaupt FM, Hamlin TA, Dixon DJ. Cobalt-Catalyzed Enantio- and Regioselective C(sp 3 )-H Alkenylation of Thioamides. Angew Chem Int Ed Engl 2024; 63:e202316021. [PMID: 38143241 DOI: 10.1002/anie.202316021] [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: 10/23/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 12/26/2023]
Abstract
An enantioselective cobalt-catalyzed C(sp3 )-H alkenylation of thioamides with but-2-ynoate ester coupling partners employing thioamide directing groups is presented. The method is operationally simple and requires only mild reaction conditions, while providing alkenylated products as single regioisomers in excellent yields (up to 85 %) and high enantiomeric excess [up to 91 : 9 enantiomeric ratio (er), or up to >99 : 1 er after a single recrystallization]. Diverse downstream derivatizations of the products are demonstrated, delivering a range of enantioenriched constructs. Extensive computational studies using density functional theory provide insight into the detailed reaction mechanism, origin of enantiocontrol, and the unusual regioselectivity of the alkenylation reaction.
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Affiliation(s)
- Lucia Staronova
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Ken Yamazaki
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Xing Xu
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Heyao Shi
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - F Matthias Bickelhaupt
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
- Institute of Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg, 2006, South Africa
| | - Trevor A Hamlin
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
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3
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Wang YX, Chen LP, Cao FD, Zhao B, Li ZP, Li XF, Huang LJ. A New Pathway for the Synthesis of Ketones from Aldehydes and Sulfonylhydrazones: Is Diazo the Key Intermediate? Chemistry 2023; 29:e202301569. [PMID: 37394679 DOI: 10.1002/chem.202301569] [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: 05/17/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/04/2023]
Abstract
A new pathway via a cyclic intermediate for the synthesis of ketones from aldehydes and sulfonylhydrazone derivatives under basic conditions is proposed. Several control experiments were performed along with analysis of the mass spectra and in-situ IR spectra of the reaction mixture. Inspired by the new mechanism, an efficient and scalable method for homologation of aldehydes to ketones was developed. A wide variety of target ketones were obtained in yields of 42-95 % by simply heating the 3-(trifluoromethyl)benzene sulfonylhydrazones (3-(Tfsyl)hydrazone) for 2 h at 110 °C with aldehydes and with K2 CO3 and DMSO as base and solvent, respectively.
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Affiliation(s)
- Yue-Xing Wang
- State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering, Qingdao University of Science and Technology, 266042, Qingdao, Shandong, P. R. China
| | - Li-Ping Chen
- State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering, Qingdao University of Science and Technology, 266042, Qingdao, Shandong, P. R. China
| | - Feng-de Cao
- State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering, Qingdao University of Science and Technology, 266042, Qingdao, Shandong, P. R. China
| | - Bin Zhao
- State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering, Qingdao University of Science and Technology, 266042, Qingdao, Shandong, P. R. China
| | - Zhen-Peng Li
- State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering, Qingdao University of Science and Technology, 266042, Qingdao, Shandong, P. R. China
| | - Xiu-Fen Li
- State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering, Qingdao University of Science and Technology, 266042, Qingdao, Shandong, P. R. China
| | - Long-Jiang Huang
- State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering, Qingdao University of Science and Technology, 266042, Qingdao, Shandong, P. R. China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 100050, Beijing, P. R. China
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4
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Wang H, Wang S, George V, Llorente G, König B. Photo‐Induced Homologation of Carbonyl Compounds for Iterative Syntheses. Angew Chem Int Ed Engl 2022; 61:e202211578. [PMID: 36226924 PMCID: PMC10099875 DOI: 10.1002/anie.202211578] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Indexed: 11/12/2022]
Abstract
We describe a photo-induced reaction for the in situ generation of highly reactive alkyl diazo species from carbonyl precursors via photo-excitation of N-tosylhydrazone anions. The diazo intermediates undergo efficient C-H insertion of aldehydes, leading to the productive synthesis of aldehydes and ketones. The method is applicable to the iterative synthesis of densely functionalized carbonyl compounds through sequential trapping of the diazo species with various aldehydes. The reaction proceeds without the need of any catalyst by light irradiation and features high functional group tolerance. More than 70 examples, some performed on a gram-scale, demonstrate the broad applicability of this reaction sequence in synthesis.
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Affiliation(s)
- Hua Wang
- Faculty of Chemistry and Pharmacy University Regensburg 93040 Regensburg Germany
- Department of Chemistry, School of Pharmacy The Fourth Military Medical University Xi'an 710032 P. R. China
| | - Shun Wang
- Faculty of Chemistry and Pharmacy University Regensburg 93040 Regensburg Germany
| | - Vincent George
- Faculty of Chemistry and Pharmacy University Regensburg 93040 Regensburg Germany
| | - Galder Llorente
- Faculty of Chemistry and Pharmacy University Regensburg 93040 Regensburg Germany
| | - Burkhard König
- Faculty of Chemistry and Pharmacy University Regensburg 93040 Regensburg Germany
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5
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Wootton TL, Allwood DM. Synthesis of spirocyclic dihydropyrazoles from tosylhydrazones and electron-deficient alkenes. Org Biomol Chem 2022; 20:2255-2260. [PMID: 35244133 DOI: 10.1039/d2ob00093h] [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
Spirocycles represent a diverse class of molecules which have received significant attention in the pharmaceutical industry due to their broad biological activities and inherent molecular three-dimensionality. Herein, we demonstrate a procedurally simple method for the preparation of a range of spirocyclic dihydropyrazoles. The protocol utilises bench stable cyclic tosylhydrazones, which are trivial to prepare from the parent cyclic ketone without need for purification, and commercially available electron deficient alkenes. The synthetic utility of the core scaffold is also demonstrated to highlight potential for applications in medicinal chemistry and drug development programmes.
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Affiliation(s)
- Timothy L Wootton
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK.
| | - Daniel M Allwood
- Biomolecular Sciences Research Centre, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK.
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6
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Fang J, Min Q, Qin H, Liu F. Intermolecular Acylation with Acylphosphonates as Alkyl Radical Receptor under Metal-Free Conditions. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202207044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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7
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Xu WY, Zhuo KF, Gong TJ, Fu Y. Transition-Metal-Free Valorization of Biomass-derived Levulinic Acid Derivatives: Synthesis of Curcumene and Xanthorrhizol. CHEMSUSCHEM 2021; 14:884-891. [PMID: 33090706 DOI: 10.1002/cssc.202002167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/04/2020] [Indexed: 06/11/2023]
Abstract
Levulinic acid (LA) is acknowledged one of the most promising biomass-derived platform molecules and can be transformed into various value-added chemicals. Here, we report a new reaction process for the valorization of LA derivatives under transition-metal-free condition. The protocol combined with the conversion of the levulinate to tosylhydrazone and base promoted arylation, acylation, and etherification cross-coupling. Moreover, our method was applied to synthesize three biologically active molecules, rac-curcumene, rac-xanthorrhizol and rac-4,7-dimethyl-l-tetralone. This reaction discloses a new avenue for the high-value utilization of platform molecules.
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Affiliation(s)
- Wen-Yan Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Kai-Feng Zhuo
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Tian-Jun Gong
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei, 230026, P. R. China
- Hefei Institute of Energy, Hefei, P. R. China
| | - Yao Fu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, iChEM, University of Science and Technology of China, Hefei, 230026, P. R. China
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8
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Krach PE, Dewanji A, Yuan T, Rueping M. Synthesis of unsymmetrical ketones by applying visible-light benzophenone/nickel dual catalysis for direct benzylic acylation. Chem Commun (Camb) 2020; 56:6082-6085. [PMID: 32352104 DOI: 10.1039/d0cc01480j] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Herein, we report a dual catalytic system for the direct benzylic C-H acylation reaction furnishing a variety of unsymmetrical ketones. A benzophenone-derived photosensitizer combined with a nickel catalyst has been established as the catalytic system. Both acid chlorides and anhydrides are able to acylate the benzylic position of toluene and other methylbenzenes. The method offers a valuable alternative to late transition metal catalyzed C-H acylation reactions.
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Affiliation(s)
- Patricia E Krach
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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9
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Chen TR, Lin YS, Wang YX, Lee WJ, Chen KHC, Chen JD. Graphene oxide-iridium nanocatalyst for the transformation of benzylic alcohols into carbonyl compounds. RSC Adv 2020; 10:4436-4445. [PMID: 35495275 PMCID: PMC9049132 DOI: 10.1039/c9ra10294a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 01/15/2020] [Indexed: 01/07/2023] Open
Abstract
A catalyst constructed from graphene oxide and iridium chloride exhibited high activity and reliability for the selective transformation of benzylic alcohols into aromatic aldehydes or ketones. Instead of thermal reaction, the transformation was performed under ultrasonication, a green process with low byproduct, high atomic yield and high selectivity. Experimental data obtained from spherical-aberration corrected field emission TEM (ULTRA-HRTEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy and Raman spectra confirm the nanostructure of the title complex. Noticeably, the activity and selectivity for the transformation of benzylic alcohols remained unchanged within 25 catalytic cycles. The average turn over frequency is higher than 5000 h−1, while the total turnover number (TON) is more than one hundred thousand, making it a high greenness and eco-friendly process for alcohol oxidation. Graphene oxide–iridium nanostructure act as a robust catalyst exhibiting high activity and reliability for the selective transformation of benzylic alcohols into aromatic aldehydes or ketones.![]()
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Affiliation(s)
- Tsun-Ren Chen
- Department of Applied Chemistry, National Ping Tung University Pingtong City Taiwan
| | - Yi-Sheng Lin
- Department of Applied Chemistry, National Ping Tung University Pingtong City Taiwan
| | - Yu-Xiang Wang
- Department of Applied Chemistry, National Ping Tung University Pingtong City Taiwan
| | - Wen-Jen Lee
- Department of Applied Physics, National Ping Tung University Pingtong City Taiwan
| | - Kelvin H-C Chen
- Department of Applied Chemistry, National Ping Tung University Pingtong City Taiwan
| | - Jhy-Der Chen
- Department of Chemistry, Chung-Yuan Christian University Chung-Li Taiwan
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10
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Saccoccia F, Brindisi M, Gimmelli R, Relitti N, Guidi A, Saraswati AP, Cavella C, Brogi S, Chemi G, Butini S, Papoff G, Senger J, Herp D, Jung M, Campiani G, Gemma S, Ruberti G. Screening and Phenotypical Characterization of Schistosoma mansoni Histone Deacetylase 8 ( SmHDAC8) Inhibitors as Multistage Antischistosomal Agents. ACS Infect Dis 2020; 6:100-113. [PMID: 31661956 DOI: 10.1021/acsinfecdis.9b00224] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Schistosomiasis (also known as bilharzia) is a neglected tropical disease caused by platyhelminths of the genus Schistosoma. The disease is endemic in tropical and subtropical areas of the world where water is infested by the intermediate parasite host, the snail. More than 800 million people live in endemic areas and more than 200 million are infected and require treatment. Praziquantel (PZQ) is the drug of choice for schistosomiasis treatment and transmission control being safe and very effective against adult worms of all the clinically relevant Schistosoma species. Unfortunately, it is ineffective on immature, juvenile worms; therefore, it does not prevent reinfection. Moreover, the risk of development and spread of drug resistance because of the widespread use of a single drug in such a large population represents a serious threat. Therefore, research aimed at identifying novel drugs to be used alone or in combination with PZQ are needed. Schistosoma mansoni histone deacetylase 8 (SmHDAC8) is a class I zinc-dependent HDAC, which is abundantly expressed in all stages of its life cycle, thus representing an interesting target for drug discovery. Through virtual screening and phenotypical characterization of selected hits, we discovered two main chemical classes of compounds characterized by the presence of a hydroxamate-based metal binding group coupled to a spiroindoline or a tricyclic thieno[3,2-b]indole core as capping groups. Some of the compounds of both classes were deeply investigated and showed to impair viability of larval, juvenile, and adult schistosomes, to impact egg production in vitro and/or to induce morphological alterations of the adult schistosome reproductive systems. Noteworthy, all of them inhibit the recombinant form of SmHDAC8 enzyme in vitro. Overall, we identified very interesting scaffolds, paving the way to the development of effective antischistosomal agents.
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Affiliation(s)
- Fulvio Saccoccia
- Institute of Biochemistry and Cell Biology (IBBC), National Research Council (CNR), Campus A. Buzzati-Traverso, via E. Ramarini 32, 00015 Monterotondo (Rome), Italy
| | - Margherita Brindisi
- Department of Excellence of Pharmacy, University of Napoli Federico II, via D. Montesano 49, 80131 Naples, Italy
| | - Roberto Gimmelli
- Institute of Biochemistry and Cell Biology (IBBC), National Research Council (CNR), Campus A. Buzzati-Traverso, via E. Ramarini 32, 00015 Monterotondo (Rome), Italy
| | - Nicola Relitti
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
| | - Alessandra Guidi
- Institute of Biochemistry and Cell Biology (IBBC), National Research Council (CNR), Campus A. Buzzati-Traverso, via E. Ramarini 32, 00015 Monterotondo (Rome), Italy
| | - A Prasanth Saraswati
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
| | - Caterina Cavella
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
| | - Simone Brogi
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126, Pisa, Italy
| | - Giulia Chemi
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
| | - Stefania Butini
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
| | - Giuliana Papoff
- Institute of Biochemistry and Cell Biology (IBBC), National Research Council (CNR), Campus A. Buzzati-Traverso, via E. Ramarini 32, 00015 Monterotondo (Rome), Italy
| | - Johanna Senger
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstraße 25, 79104 Freiburg, Germany
| | - Daniel Herp
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstraße 25, 79104 Freiburg, Germany
| | - Manfred Jung
- Institute of Pharmaceutical Sciences, University of Freiburg, Albertstraße 25, 79104 Freiburg, Germany
| | - Giuseppe Campiani
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
| | - Sandra Gemma
- Department of Excellence of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53100, Siena, Italy
| | - Giovina Ruberti
- Institute of Biochemistry and Cell Biology (IBBC), National Research Council (CNR), Campus A. Buzzati-Traverso, via E. Ramarini 32, 00015 Monterotondo (Rome), Italy
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11
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Wang CY, Han JB, Wang L, Tang XY. Lewis Acid Catalyzed [4 + 2] Cycloaddition of N-Tosylhydrazones with ortho-Quinone Methides. J Org Chem 2019; 84:14258-14269. [PMID: 31599153 DOI: 10.1021/acs.joc.9b02040] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A formal [4 + 2] cycloaddition of N-tosylhydrazones with ortho-quinone methides was developed, affording the facile synthesis of diverse 1,3-oxazine derivatives under mild conditions. In this transformation, N-tosylhydrazones are used as a 1,2-dipole synthon under base-free conditions. Moreover, the substrate scope is broad, and the products are formed with high diastereoselectivities in most of the cases.
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Affiliation(s)
- Chun-Ying Wang
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Key Laboratory of Material Chemistry for Energy Conversion and Storage , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
| | - Jia-Bin Han
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Key Laboratory of Material Chemistry for Energy Conversion and Storage , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
| | - Long Wang
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Key Laboratory of Material Chemistry for Energy Conversion and Storage , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
| | - Xiang-Ying Tang
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Key Laboratory of Material Chemistry for Energy Conversion and Storage , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
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12
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Shu WM, Zhang XF, Zhang XX, Li M, Wang AJ, Wu AX. Metal-Free Cascade [4 + 1] Cyclization Access to 4-Aryl- NH-1,2,3-triazoles from N-Tosylhydrazones and Sodium Azide. J Org Chem 2019; 84:14919-14925. [PMID: 31612711 DOI: 10.1021/acs.joc.9b02250] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A molecular iodine-mediated coupling cyclization reaction for the synthesis of 4-aryl-NH-1,2,3-triazoles has been developed from N-tosylhydrazones and sodium azide. This metal-free cascade [4 + 1] cyclization reaction could rapidly synthesize valuable compounds via a sequential C-N and N-N bond formation. Mechanistic studies demostrate that the nitrogen atoms of the 1,2,3-triazoles are not entirely from sodium azide.
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Affiliation(s)
- Wen-Ming Shu
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434023 , P.R. China
| | - Xun-Fang Zhang
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434023 , P.R. China
| | - Xiang-Xiang Zhang
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434023 , P.R. China
| | - Min Li
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434023 , P.R. China
| | - An-Jing Wang
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434023 , P.R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry , Central China Normal University , Wuhan 430079 , P.R. China
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13
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Lei C, Zhu D, Tangcueco VIIIT, Zhou JS. Arylation of Aldehydes To Directly Form Ketones via Tandem Nickel Catalysis. Org Lett 2019; 21:5817-5822. [DOI: 10.1021/acs.orglett.9b01782] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chuanhu Lei
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Daoyong Zhu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Vicente III Tiu Tangcueco
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Jianrong Steve Zhou
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Nanshan District, Shenzhen 518055, China
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14
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Allouche EMD, Charette AB. Non-stabilized diazoalkane synthesis via the oxidation of free hydrazones by iodosylbenzene and application in in situ MIRC cyclopropanation. Chem Sci 2019; 10:3802-3806. [PMID: 31015921 PMCID: PMC6457201 DOI: 10.1039/c8sc05558k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 02/18/2019] [Indexed: 12/15/2022] Open
Abstract
Electron-rich alkyl diazo compounds are powerful reagents in organic synthesis, but the risks associated with their toxicity and instability often limit their uses. Herein we describe an efficient, easy-to-handle and safe batch protocol for the in situ generation and cyclopropanation of these highly reactive non-stabilized diazoalkanes through the oxidation of free hydrazones using iodosylbenzene. Numerous substituted cyclopropanes have been synthesized using this methodology, including various gem-dimethylcyclopropanes of particular interest in medicinal chemistry.
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Affiliation(s)
- Emmanuelle M D Allouche
- Department of Chemistry , Université de Montréal , P. O. Box 6128 Station Downtown , Montreal , Quebec , H3C 3J7 Canada .
| | - André B Charette
- Department of Chemistry , Université de Montréal , P. O. Box 6128 Station Downtown , Montreal , Quebec , H3C 3J7 Canada .
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15
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Arunprasath D, Devi Bala B, Sekar G. Luxury of
N
‐Tosylhydrazones in Transition‐Metal‐Free Transformations. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801031] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dhanarajan Arunprasath
- Department of ChemistryIndian Institute of Technology Madras Chennai – 600036 Tamil Nadu India
| | | | - Govindasamy Sekar
- Department of ChemistryIndian Institute of Technology Madras Chennai – 600036 Tamil Nadu India
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16
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Chen Y, Leonardi M, Dingwall P, Labes R, Pasau P, Blakemore DC, Ley SV. Photochemical Homologation for the Preparation of Aliphatic Aldehydes in Flow. J Org Chem 2018; 83:15558-15568. [DOI: 10.1021/acs.joc.8b02721] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yiding Chen
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Marco Leonardi
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
- Departmento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - Paul Dingwall
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Ricardo Labes
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Patrick Pasau
- UCB Biopharma SPRL, Chemical Research R5, Chemin du Foriest, 1420 Braine-L’Alleud, Belgium
| | - David C. Blakemore
- Medicine Design, Pfizer, Inc., Eastern Point Road, Groton, Connecticut 06340, United States
| | - Steven V. Ley
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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17
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Tangella Y, Manasa KL, Krishna NH, Sridhar B, Kamal A, Nagendra Babu B. Regioselective Ring Expansion of Isatins with In Situ Generated α-Aryldiazomethanes: Direct Access to Viridicatin Alkaloids. Org Lett 2018; 20:3639-3642. [DOI: 10.1021/acs.orglett.8b01417] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yellaiah Tangella
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Kesari Lakshmi Manasa
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | - Namballa Hari Krishna
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
| | | | - Ahmed Kamal
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
| | - Bathini Nagendra Babu
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110025, India
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, India
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18
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Wang JL, Li HJ, Wu YC. Divergent Synthesis of Marine Natural Products Siphonodictyal B, Corallidictyals C/D, and Liphagal Based on the Early Presence of an Aldehyde Group Instead of a Late-Stage Introduction. J Org Chem 2018; 83:8716-8723. [DOI: 10.1021/acs.joc.8b00989] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun-Li Wang
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Hui-Jing Li
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Yan-Chao Wu
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
- Beijing National Laboratory for Molecular Sciences, ICCAS, Beijing 100190, China
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19
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Dingwall P, Greb A, Crespin LNS, Labes R, Musio B, Poh JS, Pasau P, Blakemore DC, Ley SV. C–H functionalisation of aldehydes using light generated, non-stabilised diazo compounds in flow. Chem Commun (Camb) 2018; 54:11685-11688. [DOI: 10.1039/c8cc06202a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Here we explore further the use of oxadiazolines, non-stabilised diazo precursors which are bench stable, in direct, non-catalytic, aldehyde C–H functionalisation reactions under UV photolysis in flow and free from additives.
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Affiliation(s)
- Paul Dingwall
- Department of Chemistry
- University of Cambridge
- Lensfield Road
- Cambridge CB2 1EW
- UK
| | - Andreas Greb
- Department of Chemistry
- University of Cambridge
- Lensfield Road
- Cambridge CB2 1EW
- UK
| | | | - Ricardo Labes
- Department of Chemistry
- University of Cambridge
- Lensfield Road
- Cambridge CB2 1EW
- UK
| | - Biagia Musio
- Department of Chemistry
- University of Cambridge
- Lensfield Road
- Cambridge CB2 1EW
- UK
| | - Jian-Siang Poh
- Department of Chemistry
- University of Cambridge
- Lensfield Road
- Cambridge CB2 1EW
- UK
| | | | | | - Steven V. Ley
- Department of Chemistry
- University of Cambridge
- Lensfield Road
- Cambridge CB2 1EW
- UK
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20
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Guttenberger N, Breinbauer R. C H and C C bond insertion reactions of diazo compounds into aldehydes. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.10.051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Liu P, Xu G, Sun J. Metal-Free [2 + 1 + 2]-Cycloaddition of Tosylhydrazones with Hexahydro-1,3,5-triazines To Form Imidazolidines. Org Lett 2017; 19:1858-1861. [DOI: 10.1021/acs.orglett.7b00600] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Pei Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology and School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, P. R. China
| | - Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology and School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, P. R. China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology and School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, P. R. China
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22
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Plaza M, Valdés C. Stereoselective Domino Carbocyclizations of γ- and δ-Cyano-N-tosylhydrazones with Alkenylboronic Acids with Formation of Two Different C(sp(3))-C(sp(2)) Bonds on a Quaternary Stereocenter. J Am Chem Soc 2016; 138:12061-4. [PMID: 27618127 DOI: 10.1021/jacs.6b08116] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel strategy for the synthesis of functionalized carbocycles is defined, through the cascade carbocyclization of alkenylboronic acids with δ- or γ-cyano-N-tosylhydrazones. In the reaction, two C(sp(3))-C(sp(2)) bonds are formed on the former hydrazonic carbon generating an all-carbon quaternary stereocenter, and leading to cyclic ketones featuring an alkenyl side chain with complete diastereoselectivity. The processes are conducted under very simple experimental conditions, only in the presence of K2CO3, in 1,4-dioxane as solvent and under microwave irradiation, and have been applied for the synthesis of a wide structural variety of fused cyclopentanones and cyclohexanones. Moreover, the versatility of this methodology has been demonstrated in the structural modification of androsterone.
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Affiliation(s)
- Manuel Plaza
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo , c/Julián Clavería 8, 33006 Oviedo, Spain
| | - Carlos Valdés
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo , c/Julián Clavería 8, 33006 Oviedo, Spain
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23
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Wu YD, Ma JR, Shu WM, Zheng KL, Wu AX. Base-promoted domino reaction for the synthesis of 2,3-disubstituted indoles from 2-aminobenzaldehyde/2-amino aryl ketones, tosylhydrazine, and aromatic aldehydes. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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24
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Plaza M, Pérez-Aguilar MC, Valdés C. Stereoselective Csp3-Csp2Bond-Forming Reactions by Transition-Metal-Free Reductive Coupling of Cyclic Tosylhydrazones with Boronic Acids. Chemistry 2016; 22:6253-7. [DOI: 10.1002/chem.201600837] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Manuel Plaza
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; c/Julián Clavería 8 Oviedo 33006 Spain
| | - M. Carmen Pérez-Aguilar
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; c/Julián Clavería 8 Oviedo 33006 Spain
| | - Carlos Valdés
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica “Enrique Moles”; Universidad de Oviedo; c/Julián Clavería 8 Oviedo 33006 Spain
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25
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Xia AJ, Kang TR, He L, Chen LM, Li WT, Yang JL, Liu QZ. Metal-Free Ring-Expansion Reaction of Six-membered Sulfonylimines with Diazomethanes: An Approach toward Seven-Membered Enesulfonamides. Angew Chem Int Ed Engl 2015; 55:1441-4. [PMID: 26663740 DOI: 10.1002/anie.201508804] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 11/13/2015] [Indexed: 02/05/2023]
Affiliation(s)
- An-Jie Xia
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
| | - Tai-Ran Kang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
- State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, Cancer Center, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Long He
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
| | - Lian-Mei Chen
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
| | - Wen-Ting Li
- State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, Cancer Center, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Jin-Liang Yang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, Cancer Center, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
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26
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Xia AJ, Kang TR, He L, Chen LM, Li WT, Yang JL, Liu QZ. Metal-Free Ring-Expansion Reaction of Six-membered Sulfonylimines with Diazomethanes: An Approach toward Seven-Membered Enesulfonamides. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508804] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- An-Jie Xia
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
| | - Tai-Ran Kang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
- State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, Cancer Center, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Long He
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
| | - Lian-Mei Chen
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
| | - Wen-Ting Li
- State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, Cancer Center, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Jin-Liang Yang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy, Cancer Center, West China Hospital; Sichuan University; Chengdu P.R. China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, Collaborative Innovation Center of Tissue Repair Material of Sichuan Province; China West Normal University; Nanchong 637009 China
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27
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Zhang X, Wang Z, Fan X, Wang J. Synthesis of Ketones through Microwave Irradiation Promoted Metal-Free Alkylation of Aldehydes by Activation of C(sp3)–H Bond. J Org Chem 2015; 80:10660-7. [DOI: 10.1021/acs.joc.5b01824] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xinying Zhang
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhangxin Wang
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuesen Fan
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jianji Wang
- School of Chemistry and Chemical
Engineering, Collaborative Innovation Center of Henan Province for
Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical
Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
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28
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Kang BC, Nam DG, Hwang GS, Ryu DH. Catalytic Asymmetric Formal Insertion of Aryldiazoalkanes into the C–H Bond of Aldehydes: Synthesis of Enantioenriched Acyclic α-Tertiary Aryl Ketones. Org Lett 2015; 17:4810-3. [DOI: 10.1021/acs.orglett.5b02370] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Byung Chul Kang
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Dong Guk Nam
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
| | - Geum-Sook Hwang
- Western
Seoul Center, Korea Basic Science Institute, Seoul 120-140, Korea
| | - Do Hyun Ryu
- Department
of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
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29
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Zhu C, Qiu L, Xu G, Li J, Sun J. Base-Promoted/Gold-Catalyzed Intramolecular Highly Selective and Controllable Detosylative Cyclization. Chemistry 2015. [DOI: 10.1002/chem.201502073] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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30
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Ojha DP, Prabhu KR. Regioselective Synthesis of Vinyl Halides, Vinyl Sulfones, and Alkynes: A Tandem Intermolecular Nucleophilic and Electrophilic Vinylation of Tosylhydrazones. Org Lett 2014; 17:18-21. [DOI: 10.1021/ol503114n] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Devi Prasan Ojha
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, Karnataka, India
| | - Kandikere Ramaiah Prabhu
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, Karnataka, India
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31
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Li W, Tan F, Hao X, Wang G, Tang Y, Liu X, Lin L, Feng X. Catalytic Asymmetric Intramolecular Homologation of Ketones with α-Diazoesters: Synthesis of Cyclic α-Aryl/Alkyl β-Ketoesters. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409572] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Li W, Tan F, Hao X, Wang G, Tang Y, Liu X, Lin L, Feng X. Catalytic Asymmetric Intramolecular Homologation of Ketones with α-Diazoesters: Synthesis of Cyclic α-Aryl/Alkyl β-Ketoesters. Angew Chem Int Ed Engl 2014; 54:1608-11. [DOI: 10.1002/anie.201409572] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 10/29/2014] [Indexed: 11/07/2022]
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33
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Tran DN, Battilocchio C, Lou SB, Hawkins JM, Ley SV. Flow chemistry as a discovery tool to access sp 2-sp 3 cross-coupling reactions via diazo compounds. Chem Sci 2014; 6:1120-1125. [PMID: 29560199 PMCID: PMC5811102 DOI: 10.1039/c4sc03072a] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 11/07/2014] [Indexed: 11/21/2022] Open
Abstract
The room temperature sp2–sp3 cross-coupling of flow-generated diazo compounds with boronic acids is reported.
The work takes advantage of an important feature of flow chemistry, whereby the generation of a transient species (or reactive intermediate) can be followed by a transfer step into another chemical environment, before the intermediate is reacted with a coupling partner. This concept is successfully applied to achieve a room temperature sp2–sp3 cross coupling of boronic acids with diazo compounds, these latter species being generated from hydrazones under flow conditions using MnO2 as the oxidant.
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Affiliation(s)
- Duc N Tran
- Innovative Technology Centre , Department of Chemistry University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Claudio Battilocchio
- Innovative Technology Centre , Department of Chemistry University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Shing-Bong Lou
- Innovative Technology Centre , Department of Chemistry University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
| | - Joel M Hawkins
- Pfizer Worldwide Research and Development , Eastern Point Road , Groton , CT 06340 , USA
| | - Steven V Ley
- Innovative Technology Centre , Department of Chemistry University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK .
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34
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Yang Z, Son KI, Li S, Zhou B, Xu J. Specific 1,2-Hydride Shift in the Boron Trifluoride Catalyzed Reactions of Aromatic Aldehydes with Diazoacetonitrile: Simple Synthesis of β-Ketonitriles. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402901] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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35
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Merchant RR, Allwood DM, Blakemore DC, Ley SV. Regioselective Preparation of Saturated Spirocyclic and Ring-Expanded Fused Pyrazoles. J Org Chem 2014; 79:8800-11. [DOI: 10.1021/jo501624t] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Rohan R. Merchant
- Department
of Chemistry, University of Cambridge, Cambridge, CB2 1EW, U.K
| | - Daniel M. Allwood
- Department
of Chemistry, University of Cambridge, Cambridge, CB2 1EW, U.K
| | - David C. Blakemore
- Neusentis
Chemistry, Pfizer Worldwide Research and Development, The Portway Building, Granta
Park, Cambridge, CB21 6GS, U.K
| | - Steven V. Ley
- Department
of Chemistry, University of Cambridge, Cambridge, CB2 1EW, U.K
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36
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Yadav AK, Yadav LDS. An unprecedented approach to the Gabriel amine synthesis utilizing tosylhydrazones as alkylating agents. RSC Adv 2014. [DOI: 10.1039/c4ra05929h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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