1
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Ma KX, Hong CM, Yan JM, Li QH, Liu TL. Synthesis of 1,2,4,5-tetra-substituted benzenes via copper-catalyzed dimerization of γ,δ-unsaturated ketones. Chem Commun (Camb) 2024; 60:7753-7756. [PMID: 38973629 DOI: 10.1039/d4cc02458c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024]
Abstract
An efficient cyclization for the synthesis of 1,2,4,5-tetra-substituted benzenes via copper catalyzed dimerization of γ,δ-unsaturated ketones has been described. This one-pot procedure employs the γ,δ-unsaturated ketones as the sole substrate with multiple C-C bond formation. This protocol features broad substrate scope and provides a facile and robust method to construct polysubstituted benzene derivatives under mild conditions.
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Affiliation(s)
- Kai-Xian Ma
- Chongqing Key Laboratory of Soft-Matter Materials Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Chuan-Ming Hong
- Chongqing Key Laboratory of Soft-Matter Materials Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Jiang-Min Yan
- Chongqing Key Laboratory of Soft-Matter Materials Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Qing-Hua Li
- Chongqing Key Laboratory of Soft-Matter Materials Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Tang-Lin Liu
- Chongqing Key Laboratory of Soft-Matter Materials Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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2
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Gu X, Dai M, Qing X, Liu Y, Zhang Z, Wei Z, Liang T. Iron-Catalyzed Friedel-Crafts-type 3,5-Diacylation of Indoles. J Org Chem 2024; 89:10272-10282. [PMID: 38967436 DOI: 10.1021/acs.joc.4c01157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
The exploration of remote functionalization of indoles is impeded by the inherently dominant reactivity intrinsic to the pyrrole moiety. Herein, we delineate a novel strategy facilitated by Lewis acid mediation, enabling the remote C-H functionalization, which culminates in the synthesis of an array of selectively functionalized indole derivatives, encompassing 3-trifluoroacetyl and 5-benzoyl motifs, utilizing trifluoroacetic anhydride and various acyl chlorides. Notably, the protocol exhibits versatility, as epitomized by the extension of C5-acylation to alkylation and sulfonation reactions. This methodology is distinguished by its exemplary regio- and chemo-selectivity, extensive substrate scope, commendable tolerance to a diverse array of functional groups, and the employment of comparatively mild reaction conditions.
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Affiliation(s)
- Xiaoting Gu
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Maoyi Dai
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Xirui Qing
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Yifeng Liu
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Zhuan Zhang
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Zongwu Wei
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Taoyuan Liang
- Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
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3
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Hassan SM, Farid A, Panda SS, Bekheit MS, Dinkins H, Fayad W, Girgis AS. Indole Compounds in Oncology: Therapeutic Potential and Mechanistic Insights. Pharmaceuticals (Basel) 2024; 17:922. [PMID: 39065774 PMCID: PMC11280311 DOI: 10.3390/ph17070922] [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: 06/18/2024] [Revised: 06/28/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024] Open
Abstract
Cancer remains a formidable global health challenge, with current treatment modalities such as chemotherapy, radiotherapy, surgery, and targeted therapy often hindered by low efficacy and adverse side effects. The indole scaffold, a prominent heterocyclic structure, has emerged as a promising candidate in the fight against cancer. This review consolidates recent advancements in developing natural and synthetic indolyl analogs, highlighting their antiproliferative activities against various cancer types over the past five years. These analogs are categorized based on their efficacy against common cancer types, supported by biochemical assays demonstrating their antiproliferative properties. In this review, emphasis is placed on elucidating the mechanisms of action of these compounds. Given the limitations of conventional cancer therapies, developing targeted therapeutics with enhanced selectivity and reduced side effects remains a critical focus in oncological research.
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Affiliation(s)
- Sara M. Hassan
- Biotechnology Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Alyaa Farid
- Biotechnology Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Siva S. Panda
- Department of Chemistry and Biochemistry, Augusta University, Augusta, GA 30912, USA
- Department of Biochemistry and Molecular Biology, Augusta University, Augusta, GA 30912, USA
| | - Mohamed S. Bekheit
- Department of Pesticide Chemistry, National Research Centre, Dokki, Giza 12622, Egypt;
| | - Holden Dinkins
- Department of Chemistry and Biochemistry, Augusta University, Augusta, GA 30912, USA
| | - Walid Fayad
- Drug Bioassay-Cell Culture Laboratory, Pharmacognosy Department, National Research Centre, Dokki, Giza 12622, Egypt
| | - Adel S. Girgis
- Department of Pesticide Chemistry, National Research Centre, Dokki, Giza 12622, Egypt;
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4
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Piejko M, Moran J, Lebœuf D. Difunctionalization Processes Enabled by Hexafluoroisopropanol. ACS ORGANIC & INORGANIC AU 2024; 4:287-300. [PMID: 38855339 PMCID: PMC11157514 DOI: 10.1021/acsorginorgau.3c00067] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/12/2024] [Accepted: 02/13/2024] [Indexed: 06/11/2024]
Abstract
In the past 5 years, hexafluoroisopropanol (HFIP) has been used as a unique solvent or additive to enable challenging transformations through substrate activation and stabilization of reactive intermediates. In this Review, we aim at describing difunctionalization processes which were unlocked when HFIP was involved. Specifically, we focus on cyclizations and additions to alkenes, alkynes, epoxides, and carbonyls that introduce a wide range of functional groups of interest.
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Affiliation(s)
- Maciej Piejko
- Institut
de Science et d’Ingénierie Supramoléculaires
(ISIS), CNRS UMR 7006, Université
de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Joseph Moran
- Institut
de Science et d’Ingénierie Supramoléculaires
(ISIS), CNRS UMR 7006, Université
de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
- Department
of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- Institut
Universitaire de France (IUF), 75005 Paris, France
| | - David Lebœuf
- Institut
de Science et d’Ingénierie Supramoléculaires
(ISIS), CNRS UMR 7006, Université
de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
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5
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Wu YJ, Ma C, Qiao JF, Cheng XY, Liang YF. Nickel-catalysed highly regioselective synthesis of β-acyl naphthalenes under reductive conditions. Chem Commun (Camb) 2024; 60:5723-5726. [PMID: 38742267 DOI: 10.1039/d4cc01660b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Over the past decade, significant progress has been made in the direct C-H acylation of naphthalenes, occurring at the α or β-positions to yield valuable ketones through Friedel-Crafts acylation or transition-metal-catalysed carbonylative coupling reactions. Nevertheless, highly regioselective acylation of naphthalenes remains a formidable challenge. Herein, we developed a nickel-catalysed reductive ring-opening reaction of 7-oxabenzonorbornadienes with acyl chlorides as the electrophilic coupling partner, providing a new method for the exclusive preparation of β-acyl naphthalenes.
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Affiliation(s)
- Yu-Juan Wu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Chen Ma
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Jia-Fan Qiao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Xiao-Yu Cheng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Yu-Feng Liang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
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6
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Banerjee R, Ali D, Mondal N, Choudhury LH. HFIP-Mediated Multicomponent Reactions: Synthesis of Pyrazole-Linked Thiazole Derivatives. J Org Chem 2024; 89:4423-4437. [PMID: 38483135 DOI: 10.1021/acs.joc.3c02567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
The development of one-pot, atom, and step-economic new methods avoiding metal, harsh reaction conditions, and toxic reagents for the synthesis of medicinally important hybrid molecules bearing more than one bioactive moieties is currently one of the hot topics in organic synthesis. Herein, we report a green and efficient room temperature multicomponent reaction for the synthesis of novel pyrazole-linked thiazoles involving a one-pot C-C, C-N, and C-S bond-forming process from the reaction of aryl glyoxal, aryl thioamide, and pyrazolones in 1,1,1,3,3,3-hexafluoroisopropanol, a hydrogen bond donating reaction medium. A set of diverse hybrid molecules bearing thiazole and pyrazole moieties were prepared in good to excellent yields by using this method. This methodology can also be extended to prepare thiazole-linked barbiturates as well as imidazole-linked pyrazoles. All the products were fully characterized by spectroscopic techniques. The notable features of this protocol are room temperature, metal as well as additive-free reaction conditions, use of recyclable solvent, water as the byproduct, wide substrate scope, operational simplicity, easy purification, applicability for gram-scale synthesis, high atom economy, and the presence of two bioactive pyrazole and thiazole moieties in the products.
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Affiliation(s)
- Riddhiman Banerjee
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, India
| | - Danish Ali
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, India
| | - Nurabul Mondal
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, India
| | - Lokman H Choudhury
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, India
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7
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Zhu L, Ren Y, Liu X, Xu S, Li T, Xu W, Li Z, Liu Y, Xiong B. Catalyst- and Additive-free, Regioselective 1,6-Hydroarylation of para-Quinone Methides with Anilines in HFIP. Chem Asian J 2023; 18:e202300792. [PMID: 37845179 DOI: 10.1002/asia.202300792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/15/2023] [Accepted: 10/16/2023] [Indexed: 10/18/2023]
Abstract
A simple and efficient method for the synthesis of diarylmethyl-functionalized anilines through the hexafluoroisopropanol (HFIP)-mediated regioselective 1,6-hydroarylation reaction of para-quinone methides (p-QMs) with anilines under catalyst- and additive-free conditions is reported. Various kinds of p-QMs and amines (e. g. primary, secondary and tertiary amines) are well tolerated in this transformation without the pre-protection of amino group, and the corresponding products could be generated with good to excellent yields and satisfactory regioselectivity under the optimized reaction conditions. In addition to adaptable amine compounds, indoles and their derivatives are also compatible with this reaction system. This transformation can be easily extended to a gram scale-synthesis level to synthesize the target product. Furthermore, it is worth noting that some complex small aniline molecules with biological activity can be selectively modified using this method. The possible reaction mechanism is proposed through the step-by-step control experiments and DFT calculations, showing that the key process for achieving the regioselective 1,6-hydroarylation of p-QMs is the hydrogen bonding effect of HFIP to substrates.
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Affiliation(s)
- Longzhi Zhu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, P. R. China
| | - Yining Ren
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, P. R. China
| | - Xianping Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, P. R. China
| | - Shipan Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, P. R. China
| | - Tao Li
- Hunan Provincial Institute of Product and Goods Quality Inspection, Changsha, 410007 (P. R., China
| | - Weifeng Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, P. R. China
| | - Zikang Li
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom, Hong Kong, P. R. China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, P. R. China
| | - Biquan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, P. R. China
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8
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Ramos-Villaseñor JM, Sotelo-Gil J, Rodil SE, Frontana-Uribe BA. Dihydrolevoglucosenone (Cyrene™), a new possibility of an environmentally compatible solvent in synthetic organic electrochemistry. Faraday Discuss 2023; 247:182-194. [PMID: 37551421 DOI: 10.1039/d3fd00064h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Dihydrolevoglucosenone (DLG or Cyrene™) solvent is a green dipolar solvent produced from cellulose waste. Different studies have demonstrated that it can successfully replace dipolar solvents, such as N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMA) and N-methylpyrrolidinone (NMP), in a variety of chemical reactions. In this paper, the first application of DLG in organic electrosynthesis is described, with results of its use in the electrochemical reduction of benzophenone derivatives (ca. E = -1.75 V vs. Ag/AgCl), as a greener alternative to other dipolar solvents with environmental concerns. Conductivity measurements show that the solvent presents conductivity and viscosity limitations that can be overcome by using EtOH as a cosolvent. The DLG/EtOH mixture resulted in a convenient solvent to carry out galvanostatic electroreductions of starting materials that exhibit high potential value. Furthermore, the reaction pathway (1e- or 2e-) was found to be dependent on the supporting electrolyte used; TBABF4 favored 2e- reduction to the corresponding alcohol (52-85%), whereas LiClO4 promoted C-C pinacolic coupling (47-70%).
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Affiliation(s)
- Jose Manuel Ramos-Villaseñor
- Centro Conjunto de Investigación en Química Sustentable UNAEM-UNAM, Toluca, 50200, Estado de México, Mexico.
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior. Ciudad Universitaria, Coyoacán, 04510 CDMX, Mexico
| | - Jessica Sotelo-Gil
- Centro Conjunto de Investigación en Química Sustentable UNAEM-UNAM, Toluca, 50200, Estado de México, Mexico.
| | - Sandra E Rodil
- Instituto de Investigación en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510 CDMX, Mexico
| | - Bernardo Antonio Frontana-Uribe
- Centro Conjunto de Investigación en Química Sustentable UNAEM-UNAM, Toluca, 50200, Estado de México, Mexico.
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior. Ciudad Universitaria, Coyoacán, 04510 CDMX, Mexico
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9
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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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10
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Iuliano V, Talotta C, De Rosa M, Soriente A, Neri P, Rescifina A, Floresta G, Gaeta C. Insights into the Friedel-Crafts Benzoylation of N-Methylpyrrole inside the Confined Space of the Self-Assembled Resorcinarene Capsule. Org Lett 2023; 25:6464-6468. [PMID: 37641853 PMCID: PMC10496122 DOI: 10.1021/acs.orglett.3c01935] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Indexed: 08/31/2023]
Abstract
Friedel-Crafts benzoylation of N-methylpyrrole 2 can run inside the confined space of the hexameric resorcinarene capsule C. The bridged water molecules at the corner of C act as H-bonding donor groups to polarize the C-Cl bond of benzoyl chlorides 3a-f. Confinement effects on the regiochemistry of the FC benzoylation of N-methylpyrrole are observed. The nature of the para-substituents of 3a-f and their ability to establish H-bonds with the water molecules of C work synergistically with the steric constrictions imposed by the capsule to drive the regiochemistry of products 4a-f. QM investigations indicate that inside the cavity of C, the FC benzoylation of 2 has a bimolecular concerted SN2 mechanism, appropriately, above-plane nucleophilic vinylic substitution (SNVπ)─supported by H-bonding interactions between water molecules and both the leaving Cl atom and the carbonyl group.
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Affiliation(s)
- Veronica Iuliano
- Laboratory
of Supramolecular Chemistry, Dipartimento di Chimica e Biologia “A.
Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Carmen Talotta
- Laboratory
of Supramolecular Chemistry, Dipartimento di Chimica e Biologia “A.
Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Margherita De Rosa
- Laboratory
of Supramolecular Chemistry, Dipartimento di Chimica e Biologia “A.
Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Annunziata Soriente
- Laboratory
of Supramolecular Chemistry, Dipartimento di Chimica e Biologia “A.
Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Placido Neri
- Laboratory
of Supramolecular Chemistry, Dipartimento di Chimica e Biologia “A.
Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
| | - Antonio Rescifina
- Dipartimento
di Scienze del Farmaco, Università
di Catania, Viale Andrea
Doria 6, 95125 Catania, Italy
| | - Giuseppe Floresta
- Dipartimento
di Scienze del Farmaco, Università
di Catania, Viale Andrea
Doria 6, 95125 Catania, Italy
| | - Carmine Gaeta
- Laboratory
of Supramolecular Chemistry, Dipartimento di Chimica e Biologia “A.
Zambelli”, Università di Salerno, Via Giovanni Paolo II 132, I-84084 Fisciano, Salerno, Italy
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11
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Wu Y, Lu W, Ma YN, Chen F, Ren W, Chen X. Trifluoromethanesulfonic Acid Promoted Controllable Electrophilic Aromatic Nitration. J Org Chem 2023. [PMID: 37463455 DOI: 10.1021/acs.joc.3c00892] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
In this work, we developed a facile and controllable electrophilic aromatic nitration method with commercially available 68% HNO3 as the nitrating reagent and trifluoromethanesulfonic acid (HOTf) as the catalyst in hexafluoroisopropanol or under solvent-free conditions. The electrophilic nitration products of different arenes can be obtained in almost quantitative yields by tuning the loading of HOTf. The strong acidity and water absorbing property of HOTf allowed this transformation to reach completion in a short time at room temperature.
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Affiliation(s)
- Yanxuan Wu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Wen Lu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yan-Na Ma
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Feijing Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Wei Ren
- Henan Scientific Research Platform Service Center, Zhengzhou 450000, China
| | - Xuenian Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
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12
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Chu D, Ellman JA. Stereospecific Synthesis of Unprotected, α,β-Disubstituted Tryptamines and Phenethylamines from 1,2-Disubstituted Alkenes via a One-Pot Reaction Sequence. Org Lett 2023; 25:3654-3658. [PMID: 37172224 PMCID: PMC10239558 DOI: 10.1021/acs.orglett.3c01021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Unprotected, α,β-disubstituted tryptamines and phenethylamines are obtained by a one-pot, metal-free sequence that proceeds by the in situ formation of aziridinium salts followed by Friedel-Crafts reaction with electron-rich (hetero)arenes. Both steps are facilitated by hexafluoroisopropanol as the solvent. The one-pot sequence was effective for diversely substituted indoles and 1,3,5-trimethoxybenzene, for cyclic and acyclic alkenes, and proceeded in a stereospecific fashion for both (E)- and (Z)-1,2-disubstituted alkenes. Moreover, one-pot morpholine addition to an aziridinium salt provided a diamine.
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Affiliation(s)
- Duc Chu
- Department of Chemistry, Yale University, New Haven, CT 04720, USA
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13
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Rygus JPG, Hall DG. Direct nucleophilic and electrophilic activation of alcohols using a unified boron-based organocatalyst scaffold. Nat Commun 2023; 14:2563. [PMID: 37142592 PMCID: PMC10160031 DOI: 10.1038/s41467-023-38228-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 04/18/2023] [Indexed: 05/06/2023] Open
Abstract
Organocatalytic strategies for the direct activation of hydroxy-containing compounds have paled in comparison to those applicable to carbonyl compounds. To this end, boronic acids have emerged as valuable catalysts for the functionalization of hydroxy groups in a mild and selective fashion. Distinct modes of activation in boronic acid-catalyzed transformations are often accomplished by vastly different catalytic species, complicating the design of broadly applicable catalyst classes. Herein, we report the use of benzoxazaborine as a general scaffold for the development of structurally related yet mechanistically divergent catalysts for the direct nucleophilic and electrophilic activation of alcohols under ambient conditions. The utility of these catalysts is demonstrated in the monophosphorylation of vicinal diols and the reductive deoxygenation of benzylic alcohols and ketones respectively. Mechanistic studies of both processes reveal the contrasting nature of key tetravalent boron intermediates in the two catalytic manifolds.
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Affiliation(s)
- Jason P G Rygus
- Department of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, AB, T6G 2G2, Canada
| | - Dennis G Hall
- Department of Chemistry, Centennial Center for Interdisciplinary Science, University of Alberta, Edmonton, AB, T6G 2G2, Canada.
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14
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Hu X, Zhao X, Lv X, Wu YB, Bu Y, Lu G. Ab Initio Metadynamics Simulations of Hexafluoroisopropanol Solvent Effects: Synergistic Role of Solvent H-Bonding Networks and Solvent-Solute C-H/π Interactions. Chemistry 2023; 29:e202203879. [PMID: 36575142 DOI: 10.1002/chem.202203879] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 12/27/2022] [Indexed: 12/29/2022]
Abstract
The solvent effects in Friedel-Crafts cycloalkylation of epoxides and Cope rearrangement of aldimines were investigated by using ab initio molecular dynamics simulations. Explicit molecular treatments were applied for both reactants and solvents. The reaction mechanisms were elucidated via free energy calculations based on metadynamics simulations. The results reveal that both reactions proceed in a concerted fashion. Key solvent-substrate interactions are identified from the structures of transition states with explicit solvent molecules. The remarkable promotion effect of hexafluoroisopropanol solvent is ascribed to the synergistic effect of H-bonding networks and C-H/π interactions with substrates.
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Affiliation(s)
- Xinmin Hu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong, 250100, P. R. China
| | - Xia Zhao
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong, 250100, P. R. China
| | - Xiangying Lv
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong, 250100, P. R. China
| | - Yan-Bo Wu
- Key Lab for Materials of Energy Conversion and Storage of Shanxi Province, and Key Lab of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi, 030006, P. R. China
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong, 250100, P. R. China
| | - Gang Lu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong, 250100, P. R. China
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15
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Motiwala HF, Armaly AM, Cacioppo JG, Coombs TC, Koehn KRK, Norwood VM, Aubé J. HFIP in Organic Synthesis. Chem Rev 2022; 122:12544-12747. [PMID: 35848353 DOI: 10.1021/acs.chemrev.1c00749] [Citation(s) in RCA: 124] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
1,1,1,3,3,3-Hexafluoroisopropanol (HFIP) is a polar, strongly hydrogen bond-donating solvent that has found numerous uses in organic synthesis due to its ability to stabilize ionic species, transfer protons, and engage in a range of other intermolecular interactions. The use of this solvent has exponentially increased in the past decade and has become a solvent of choice in some areas, such as C-H functionalization chemistry. In this review, following a brief history of HFIP in organic synthesis and an overview of its physical properties, literature examples of organic reactions using HFIP as a solvent or an additive are presented, emphasizing the effect of solvent of each reaction.
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Affiliation(s)
- Hashim F Motiwala
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Ahlam M Armaly
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jackson G Cacioppo
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Thomas C Coombs
- Department of Chemistry, University of North Carolina Wilmington, Wilmington, North Carolina 28403 United States
| | - Kimberly R K Koehn
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Verrill M Norwood
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jeffrey Aubé
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
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16
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Vinayagam V, Karre SK, Kasu SR, Srinath R, Naveen Babu Bathula HS, Sadhukhan SK. AlCl 3-Mediated CHF 2 Transfer and Cyclocondensation of Difluoromethoxy Functionalized o-Phenylenediamines to Access N-Substituted Benzimidazoles. Org Lett 2022; 24:6142-6147. [PMID: 35938941 DOI: 10.1021/acs.orglett.2c02231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report for the first time a transition-metal-free frustrated Lewis pair (FLP) catalyzed CHF2 group migration from an oxygen atom to the neighboring nitrogen atom, which led to the synthesis of N-substituted benzimidazoles at room temperature with excellent yields, broad functional group tolerance, and a short reaction time. The oxygen-attached difluoromethane acted as a C1 source in the synthesis of N-substituted benzimidazoles in the presence of AlCl3 by cleaving one C-O bond and two C-F bonds, resulting in formation of two new C-N bonds.
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Affiliation(s)
- Vinothkumar Vinayagam
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Satish Kumar Karre
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Sreenivasa Reddy Kasu
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Ravuri Srinath
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Hema Sundar Naveen Babu Bathula
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
| | - Subir Kumar Sadhukhan
- Curia India Pvt. Ltd (Formerly Albany Molecular Research, Hyderabad Research Centre), MN Park, Genome Valley, Shameerpet, RR District, Hyderabad 500078, India
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17
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Nagahata S, Takei S, Ueno S. One-Pot Synthesis of Multiarylated Benzophenones via [3 + 2 + 1] Benzannulation of Ketones, Alkynes, and α,β-Unsaturated Carbonyls. J Org Chem 2022; 87:10377-10384. [PMID: 35796518 DOI: 10.1021/acs.joc.2c00601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this study, we synthesized γ-phenyl-β,γ-unsaturated ketones in situ from acetophenones and phenylacetylenes under Trofimov's conditions using KOtBu in a dimethyl sulfoxide (DMSO) solvent. The obtained ketones reacted with α,β-unsaturated carbonyls in a one-pot manner, forming tri- or diarylated benzophenones. The present reaction proceeded efficiently by one-pot manipulation with a suitable carboxylic acid.
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Affiliation(s)
- Shoko Nagahata
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Seiya Takei
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Satoshi Ueno
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
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18
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Yang J, Liu S, Gui J, Xiong D, Li J, Wang Z, Ren J. HFIP-Promoted Selective Hydroxyalkylation of Aniline Derivatives with Arylglyoxal Hydrates. J Org Chem 2022; 87:6352-6361. [DOI: 10.1021/acs.joc.1c03155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jianguo Yang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Hubei University, Wuhan 430062, PR China
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
| | - Saimei Liu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Hubei University, Wuhan 430062, PR China
| | - Jing Gui
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
| | - Daokai Xiong
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
| | - Jinshan Li
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
| | - Zhiming Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
| | - Jun Ren
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Hubei University, Wuhan 430062, PR China
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19
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Chu D, Ellman JA. Three-Component Friedel-Crafts Transformations: Synthesis of Alkyl and Alkenyl Trifluoromethyl Sulfides and Alkenyl Iodides. Org Lett 2022; 24:2921-2925. [PMID: 35394794 PMCID: PMC9096271 DOI: 10.1021/acs.orglett.2c00924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Straightforward and mild hexafluoroisopropanol (HFIP)-mediated, metal-free, three-component Friedel-Crafts approaches are reported for the synthesis of alkenyl and alkyl trifluoromethyl sulfides from arenes, (PhSO2)2NSCF3, and alkynes or alkenes, respectively. The transformations proceed with high regio- and stereochemical control via the initial formation of cationic thiirenium and thiiranium intermediates, respectively, followed by Friedel-Crafts reactions with the arene. A mechanistically related three-component synthesis of alkenyl iodides from arenes, alkenes, and N-iodosuccinimide is also reported.
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Affiliation(s)
- Duc Chu
- Department of Chemistry, Yale University, New Haven, Connecticut 04720, United States
| | - Jonathan A Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut 04720, United States
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20
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Vayer M, Zhang S, Moran J, Lebœuf D. Rapid and Mild Metal-Free Reduction of Epoxides to Primary Alcohols Mediated by HFIP. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00216] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Marie Vayer
- Université de Strasbourg, CNRS, ISIS UMR 7006, Strasbourg, 67000, France
| | - Shaofei Zhang
- Université de Strasbourg, CNRS, ISIS UMR 7006, Strasbourg, 67000, France
| | - Joseph Moran
- Université de Strasbourg, CNRS, ISIS UMR 7006, Strasbourg, 67000, France
| | - David Lebœuf
- Université de Strasbourg, CNRS, ISIS UMR 7006, Strasbourg, 67000, France
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21
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Tian FX, Qu J. Studies on the Origin of the Stabilizing Effects of Fluorinated Alcohols and Weakly Coordinated Fluorine-Containing Anions on Cationic Reaction Intermediates. J Org Chem 2022; 87:1814-1829. [PMID: 35020378 DOI: 10.1021/acs.joc.1c02361] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Many synthetic methods that use fluorinated alcohols as solvents have been reported, and the fluorinated alcohols have been found to be crucial to the success of these methods. In addition, there have been reports indicating that adding a weakly coordinated fluorine-containing anion, such as BF4-, PF6-, or SbF6-, to fluorinated alcohols can improve yields. The boosting effect of fluorinated alcohols is attributed mainly to hydrogen bond activation. A few studies have suggested that the very polar fluorinated alcohols can stabilize cationic reaction intermediates. However, how they do so and why weakly coordinated fluorine-containing anions improve yields have not been studied in depth. Here, we used quaternary ammonium cations, a quaternary phosphonium cation, and a triaryl-substituted carbocation as models for short-lived cationic intermediates and studied the possible interactions of these cations with fluorinated alcohols and BF4-, PF6-, or SbF6-. On the basis of the results, we propose that the C-F dipoles of fluorinated alcohols and the E-F dipoles (where E is B, P, or Sb) of weakly coordinated fluorine-containing anions stabilized these cations by intermolecular charge-dipole interactions. We deduced that in the same fashion the C-F and E-F dipoles can thermodynamically stabilize cationic reaction intermediates.
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Affiliation(s)
- Feng-Xian Tian
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jin Qu
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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22
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Song H, Zhou H, Shen Y, Wang H, Song H, Cai X, Xu C. HFIP as Protonation Reagent and Solvent for Regioselective Alkylation of Indoles with All-Carbon Centers. J Org Chem 2022; 87:1086-1097. [PMID: 35015536 DOI: 10.1021/acs.joc.1c02412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The regio- and chemoselective construction of indole bearing an all-carbon center at the C3-position, a versatile bioactive building block, by C(sp2)-C(sp3) formation with olefins has been achieved through utilization of hexafluoroisopropanol (HFIP) as the protonation reagent and solvent. The catalytic reactions are operationally simple and green compared with previous reports utilizing elaborated olefins and catalysts. This protocol allows for alkylation of a variety of substituted indoles with diverse of styrene type alkenes in excellent yields and with high selectivity. Application of this protocol to the synthesis of drug was pursued and with an improved yield in contrast to previous art. Catalytic kinetics and deuterium-labeling experiments suggest that the rate-determining step involves the protonation of olefin by HFIP to generate carbocation, followed by electrophilic addition to indole derivative.
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Affiliation(s)
- Heng Song
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Hu Zhou
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Yang Shen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Hao Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Hua Song
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Xingwei Cai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
| | - Chen Xu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, P.R. China
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23
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Redox-neutral C–H acylation of indole with ketene by manganese catalysis. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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24
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Shukla PM, Bhattacharya A, Pratap A, Pradhan A, Sinha P, Soni T, Maji B. HFIP-promoted halo-carbocyclizations of N- and O-tethered arene–alkene substrates to access all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman cores. Org Biomol Chem 2022; 20:8136-8144. [DOI: 10.1039/d2ob01597h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Herein, a HFIP-promoted mild and efficient method for the synthesis of all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman building blocks is disclosed.
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Affiliation(s)
- Pushpendra Mani Shukla
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Aditya Bhattacharya
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Aniruddh Pratap
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Akash Pradhan
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Puspita Sinha
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Tanishk Soni
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
| | - Biswajit Maji
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India
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25
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Bhattacharya A, mani Shukla P, Maji B. “Haliranium Ion”‐Induced Intermolecular Friedel‐Crafts Alkylation in HFIP: Synthesis of β,β‐Diaryl α‐Halo carbonyl Compounds. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Aditya Bhattacharya
- Department of Chemistry Indira Gandhi National Tribal University Amarkantak Anuppur-484886 India
| | - Pushpendra mani Shukla
- Department of Chemistry Indira Gandhi National Tribal University Amarkantak Anuppur-484886 India
| | - Biswajit Maji
- Department of Chemistry Indira Gandhi National Tribal University Amarkantak Anuppur-484886 India
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26
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Rodríguez JF, Zhang A, Bajohr J, Whyte A, Mirabi B, Lautens M. Cycloisomerization of Carbamoyl Chlorides in Hexafluoroisopropanol: Stereoselective Synthesis of Chlorinated Methylene Oxindoles and Quinolinones. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103323] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- José F. Rodríguez
- Davenport Research Laboratories Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Anji Zhang
- Davenport Research Laboratories Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Jonathan Bajohr
- Davenport Research Laboratories Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Andrew Whyte
- Davenport Research Laboratories Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Bijan Mirabi
- Davenport Research Laboratories Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Mark Lautens
- Davenport Research Laboratories Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
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27
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Rodríguez JF, Zhang A, Bajohr J, Whyte A, Mirabi B, Lautens M. Cycloisomerization of Carbamoyl Chlorides in Hexafluoroisopropanol: Stereoselective Synthesis of Chlorinated Methylene Oxindoles and Quinolinones. Angew Chem Int Ed Engl 2021; 60:18478-18483. [PMID: 34157191 DOI: 10.1002/anie.202103323] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 05/24/2021] [Indexed: 12/20/2022]
Abstract
Hexafluoroisopropanol (HFIP) was employed as an additive for the generation of 3-(chloromethylene)oxindoles via the chloroacylation of alkyne-tethered carbamoyl chlorides. This reaction avoids the use of a metal catalyst and accesses products in high yields and stereoselectivities. Additionally, this reaction is scalable and proved amenable to a series of product derivatizations, including the synthesis of nintedanib. The reactivity of alkene-tethered carbamoyl chlorides with hexafluoroisopropanol (HFIP) was harnessed towards the synthesis of 2-quinolinones.
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Affiliation(s)
- José F Rodríguez
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Anji Zhang
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Jonathan Bajohr
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Andrew Whyte
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Bijan Mirabi
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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28
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Fulo HF, Shoeib A, Cabanlong CV, Williams AH, Zhan CG, Prather PL, Dudley GB. Synthesis, Molecular Pharmacology, and Structure-Activity Relationships of 3-(Indanoyl)indoles as Selective Cannabinoid Type 2 Receptor Antagonists. J Med Chem 2021; 64:6381-6396. [PMID: 33887913 PMCID: PMC8683641 DOI: 10.1021/acs.jmedchem.1c00442] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Synthetic indole cannabinoids characterized by a 2',2'-dimethylindan-5'-oyl group at the indole C3 position constitute a new class of ligands possessing high affinity for human CB2 receptors at a nanomolar concentration and a good selectivity index. Starting from the neutral antagonist 4, the effects of indole core modification on the pharmacodynamic profile of the ligands were investigated. Several N1 side chains afforded potent and CB2-selective neutral antagonists, notably derivatives 26 (R1 = n-propyl, R2 = H) and 35 (R1 = 4-pentynyl, R2 = H). Addition of a methyl group at C2 improved the selectivity for the CB2 receptor. Moreover, C2 indole substitution may control the CB2 activity as shown by the functionality switch in 35 (antagonist) and 49 (R1 = 4-pentynyl, R2 = CH3, partial agonist).
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Affiliation(s)
- Harvey F Fulo
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Amal Shoeib
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
| | - Christian V Cabanlong
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
| | - Alexander H Williams
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Chang-Guo Zhan
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Paul L Prather
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
| | - Gregory B Dudley
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
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29
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Gadde K, Maes BUW, Abbaspour Tehrani K. HFIP-mediated 2-aza-Cope rearrangement: metal-free synthesis of α-substituted homoallylamines at ambient temperature. Org Biomol Chem 2021; 19:4067-4075. [PMID: 33978010 DOI: 10.1039/d1ob00404b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
An efficient metal-free strategy for the synthesis of α-substituted homoallylamine derivatives has been developed via a 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP)-promoted 2-aza-Cope rearrangement of aldimines, generated in situ by condensation of aldehydes with easily accessible 1,1-diphenylhomoallylamines. This reaction provides rapid access to α-substituted homoallylamines with excellent functional group tolerance and yields. The reaction takes place at room temperature and no chromatographic purification is required for product isolation. The synthetic utility of the current method is further demonstrated by the transformation of the obtained benzophenone ketimines into N-unprotected homoallylamines, an α-amino alcohol and an α-amino amide.
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Affiliation(s)
- Karthik Gadde
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
| | - Bert U W Maes
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
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30
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Wang Y, Cao X, Ji J, Cui X, Pi C, Zhao L, Wu Y. Water and fluorinated alcohol mediated/promoted tandem insertion/aerobic oxidation/bisindolylation under metal-free conditions: Easy access to bis(indolyl)methanes. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.12.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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31
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Wang S, Force G, Carpentier JF, Sarazin Y, Bour C, Gandon V, Lebœuf D. Modular Synthesis of 9,10-Dihydroacridines through an ortho-C Alkenylation/Hydroarylation Sequence between Anilines and Aryl Alkynes in Hexafluoroisopropanol. Org Lett 2021; 23:2565-2570. [PMID: 33724043 DOI: 10.1021/acs.orglett.1c00487] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
9,10-Dihydroacridines are frequently encountered as key scaffolds in OLEDs. However, accessing those compounds from feedstock precursors typically requires multiple steps. Herein, a modular one-pot synthesis of 9,10-dihydroacridine frameworks is achieved through a reaction sequence featuring a selective ortho-C alkenylation of diarylamines with aryl alkynes followed by an intramolecular hydroarylation of the olefin formed as an intermediate. This transformation was accomplished by virtue of the combination of hexafluoroisopropanol and triflimide as a catalyst that triggers the whole process.
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Affiliation(s)
- Shengdong Wang
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France.,The Fifth Affiliated Hospital, Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Guillaume Force
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France
| | - Jean-François Carpentier
- Université Rennes, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes (ISCR), 35000 Rennes, France
| | - Yann Sarazin
- Université Rennes, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes (ISCR), 35000 Rennes, France
| | - Christophe Bour
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France.,Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau Cedex, France
| | - David Lebœuf
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 Allée Gaspard Monge, 67000 Strasbourg, France
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32
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Zhao Z, Tian X, Tang P, Ren Y, Zhao S, Zheng X, Cheng X. Autocatalytic Friedel‐Crafts Acylation of Arenes without Additional Catalyst and Additive. ChemistrySelect 2021. [DOI: 10.1002/slct.202100299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhe Zhao
- School of Chemical Engineering & Pharmaceutics Henan University of Science and Technology Luoyang Henan 471003 P. R. China
| | - Xinzhe Tian
- College of Science Henan Agricultural University Zhengzhou Henan 450002 P.R. China
| | - Peichen Tang
- School of Chemical Engineering Dalian University of Technology Dalian Liaoning 116024 P.R. China
| | - Yun‐Lai Ren
- College of Science Henan Agricultural University Zhengzhou Henan 450002 P.R. China
| | - Shuang Zhao
- School of Chemical Engineering & Pharmaceutics Henan University of Science and Technology Luoyang Henan 471003 P. R. China
| | - Xianfu Zheng
- College of Science Henan Agricultural University Zhengzhou Henan 450002 P.R. China
| | - Xinqiang Cheng
- School of Chemical Engineering & Pharmaceutics Henan University of Science and Technology Luoyang Henan 471003 P. R. China
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33
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Jiang G, Yang G, Liu X, Wang S, Ji F. Palladium-catalyzed sequential acylation/annulation of indoles with acyl chlorides using primary amine as the directing group. NEW J CHEM 2021. [DOI: 10.1039/d0nj04406g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An efficient, palladium(ii)-catalyzed, C(sp2)–H acylation/annulation of indoles with acyl chlorides for the synthesis of substituted indolo[1,2-a]quinazolines is reported.
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Affiliation(s)
- Guangbin Jiang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Guang Yang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Xinqiang Liu
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Shoucai Wang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
| | - Fanghua Ji
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials
- College of Chemistry and Bioengineering
- Guilin University of Technology
- Guilin 541004
- People's Republic of China
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34
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Guan R, Hsu C, Han J. Trifluoroethanol‐mediated Decarboxylative Addition Reactions of β‐Ketoacids with Diverse Electrophiles. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ren‐You Guan
- Department of Chemistry National Chung Hsing University 145 Xingda Rd., South Dist. Taichung City 402 Taiwan R.O.C
| | - Chan‐Wei Hsu
- Department of Chemistry Chung Yuan Christian University 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan R.O.C
| | - Jeng‐Liang Han
- Department of Chemistry National Chung Hsing University 145 Xingda Rd., South Dist. Taichung City 402 Taiwan R.O.C
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35
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Talukdar R. Rapid access to 3-acyl indoles using ethyl acetate/triflic acid couple as the acylium donor and Cu(OAc) 2 catalysed aerial oxidation of indole benzoins. Org Biomol Chem 2020; 18:8876-8880. [PMID: 33103169 DOI: 10.1039/d0ob01977a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Esters are potential acyl donors but are relatively unexplored for that purpose. A facile installation of acyl groups at the C-3 position of indoles under triflic acid catalysed conditions with easily available and cheap esters as new acylating agents is described herein. Furthermore, heterocycles like N-protected pyrrole, furan and thiophene were also suitable substrates for similar C-2 acylation. Analogous C-3 benzoylated products of indole were obtained, albeit in lower yields, by using methyl benzoate as a benzoyl donor. The benzoylated products were synthesised in much better yields via a copper(ii) catalysed aerial oxidation of indole containing benzoins.
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Affiliation(s)
- Ranadeep Talukdar
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India.
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36
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Yadav D, Joshi PR, Sharma SK, Menon RS. Regioselective Synthesis of Arylsulfonyl Benzophenones via Aerobic Oxidative [3+3] Benzannulation Reactions. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Deepak Yadav
- Department of Chemistry Central University of Haryana 123029 Mahendergarh Haryana India
| | - Prabhakar R. Joshi
- Medicinal Chemistry and Pharmacology Division CSIR‐Indian Institute of Chemical Technology 500007 Hyderabad India
| | - Sunil K. Sharma
- Department of Chemistry University of Delhi 110007 Delhi India
| | - Rajeev S. Menon
- Department of Chemistry Central University of Haryana 123029 Mahendergarh Haryana India
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37
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HFIP-promoted catalyst-free cascade reactions for the synthesis of biologically relevant 3,3-di(indolyl)indolin-2-ones from indoles and isatins. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.03.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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38
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Cera G, Balestri D, Bazzoni M, Marchiò L, Secchi A, Arduini A. Trisulfonamide calix[6]arene-catalysed Michael addition to nitroalkenes. Org Biomol Chem 2020; 18:6241-6246. [PMID: 32735000 DOI: 10.1039/d0ob01319f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We describe the application of a novel family of trisulfonamide (TSA) calix[6]arenes in general acid catalysis. Hydrogen-bonding interactions between acidic TSA and methanol boosted the reactivity of the Michael addition of indoles to nitroalkene derivatives. The transformation occurs at a low catalyst loading of 5 mol%, allowing for the synthesis of nitroalkanes with good yields and functional group tolerance.
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Affiliation(s)
- Gianpiero Cera
- Università di Parma, Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | - Davide Balestri
- Università di Parma, Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | - Margherita Bazzoni
- Università di Parma, Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | - Luciano Marchiò
- Università di Parma, Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | - Andrea Secchi
- Università di Parma, Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | - Arturo Arduini
- Università di Parma, Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
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39
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Milovanović MR, Dherbassy Q, Wencel‐Delord J, Colobert F, Zarić SD, Djukic J. The Affinity of Some Lewis Bases for Hexafluoroisopropanol as a Reference Lewis Acid: An ITC/DFT Study. Chemphyschem 2020; 21:2136-2142. [DOI: 10.1002/cphc.202000560] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Indexed: 01/30/2023]
Affiliation(s)
- Milan R. Milovanović
- Innovation center of Faculty of Chemistry Studentski trg 12–16 11000 Belgrade Serbia
- Laboratoire de Chimie et Systémique Organo-Métalliques (UMR 7177) Université de Strasbourg 4, rue Blaise Pascal 67000 Strasbourg France
| | - Quentin Dherbassy
- Laboratoire d'Innovation Moléculaire et applications (UMR 7042) Université de Strasbourg 25, rue Becquerel 67087 Strasbourg France
| | - Joanna Wencel‐Delord
- Laboratoire d'Innovation Moléculaire et applications (UMR 7042) Université de Strasbourg 25, rue Becquerel 67087 Strasbourg France
| | - Françoise Colobert
- Laboratoire d'Innovation Moléculaire et applications (UMR 7042) Université de Strasbourg 25, rue Becquerel 67087 Strasbourg France
| | - Snežana D. Zarić
- Faculty of Chemistry University of Belgrade Studentski trg 12–16 11000 Belgrade Serbia
| | - Jean‐Pierre Djukic
- Laboratoire de Chimie et Systémique Organo-Métalliques (UMR 7177) Université de Strasbourg 4, rue Blaise Pascal 67000 Strasbourg France
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40
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Nakamura K, Togo H. Novel Preparation of Hemiaminal Derivatives with BPO and N,N
-Dimethylamides and Their Synthetic Use for (Aminomethyl)indoles. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kohei Nakamura
- Graduate School of Science; Chiba University; Yayoi-cho 1-33, Inage-ku Chiba 263-8522 Japan
| | - Hideo Togo
- Graduate School of Science; Chiba University; Yayoi-cho 1-33, Inage-ku Chiba 263-8522 Japan
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41
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42
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Zhang S, Lebœuf D, Moran J. Brønsted Acid and H‐Bond Activation in Boronic Acid Catalysis. Chemistry 2020; 26:9883-9888. [DOI: 10.1002/chem.202001902] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Indexed: 01/15/2023]
Affiliation(s)
- Shaofei Zhang
- University of Strasbourg CNRS ISIS UMR 7006 67000 Strasbourg France
| | - David Lebœuf
- University of Strasbourg CNRS ISIS UMR 7006 67000 Strasbourg France
| | - Joseph Moran
- University of Strasbourg CNRS ISIS UMR 7006 67000 Strasbourg France
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43
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Affiliation(s)
- Ignacio Colomer
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Francisco Tomás y Valiente, 7, 28049 Madrid, Spain
- IMDEA Nanociencia, Faraday 9, Campus UAM, 28049 Madrid, Spain
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44
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Semisynthesis and biological evaluation of amidochelocardin derivatives as broad-spectrum antibiotics. Eur J Med Chem 2020; 188:112005. [PMID: 31911294 DOI: 10.1016/j.ejmech.2019.112005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/13/2019] [Accepted: 12/19/2019] [Indexed: 12/26/2022]
Abstract
To address the global challenge of emerging antimicrobial resistance, the hitherto most successful strategy to new antibiotics has been the optimization of validated natural products; most of these efforts rely on semisynthesis. Herein, we report the semisynthetic modification of amidochelocardin, an atypical tetracycline obtained via genetic engineering of the chelocardin producer strain. We report modifications at C4, C7, C10 and C11 by the application of methylation, acylation, electrophilic substitution, and oxidative C-C coupling reactions. The antibacterial activity of the reaction products was tested against a panel of Gram-positive and Gram-negative pathogens. The emerging structure-activity relationships (SARs) revealed that positions C7 and C10 are favorable anchor points for the semisynthesis of optimized derivatives. The observed SAR was different from that known for tetracyclines, which underlines the pronounced differences between the two compound classes.
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45
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Laha JK, Kaur Hunjan M, Hegde S, Gupta A. Aroylation of Electron-Rich Pyrroles under Minisci Reaction Conditions. Org Lett 2020; 22:1442-1447. [DOI: 10.1021/acs.orglett.0c00041] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Mandeep Kaur Hunjan
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Shalakha Hegde
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Anjali Gupta
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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46
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Żądło-Dobrowolska A, Hammerer L, Pavkov-Keller T, Gruber K, Kroutil W. Rational Engineered C-Acyltransferase Transforms Sterically Demanding Acyl Donors. ACS Catal 2020; 10:1094-1101. [PMID: 32030315 PMCID: PMC6996649 DOI: 10.1021/acscatal.9b04617] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/12/2019] [Indexed: 02/08/2023]
Abstract
The biocatalytic Friedel-Crafts acylation has been identified recently for the acetylation of resorcinol using activated acetic acid esters for the synthesis of acetophenone derivatives catalyzed by an acyltransferase. Because the wild-type enzyme is limited to acetic and propionic derivatives as the substrate, variants were designed to extend the substrate scope of this enzyme. By rational protein engineering, the key residue in the active site was identified which can be replaced to allow binding of bulkier acyl moieties. The single-point variant F148V enabled the transformation of previously inaccessible medium chain length alkyl and alkoxyalkyl carboxylic esters as donor substrates with up to 99% conversion and up to >99% isolated yield.
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Affiliation(s)
- Anna Żądło-Dobrowolska
- Institute
of Chemistry, University of Graz, NAWI Graz,
BioTechMed Graz, Heinrichstrasse
28, 8010 Graz, Austria
| | - Lucas Hammerer
- Institute
of Chemistry, University of Graz, NAWI Graz,
BioTechMed Graz, Heinrichstrasse
28, 8010 Graz, Austria
- ACIB
GmbH, Petersgasse 14, 8010 Graz, Austria
| | - Tea Pavkov-Keller
- Institute
of Molecular Biosciences, University of
Graz, Humboldtstrasse
50, 8010 Graz, Austria
| | - Karl Gruber
- Institute
of Molecular Biosciences, University of
Graz, Humboldtstrasse
50, 8010 Graz, Austria
| | - Wolfgang Kroutil
- Institute
of Chemistry, University of Graz, NAWI Graz,
BioTechMed Graz, Heinrichstrasse
28, 8010 Graz, Austria
- ACIB
GmbH, Petersgasse 14, 8010 Graz, Austria
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47
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Das D, Mukherjee P, Das AR. "On water" palladium catalyzed diastereoselective boronic acid addition to structurally diverse cyclopropane nitriles. Org Biomol Chem 2020; 18:8886-8898. [PMID: 33108794 DOI: 10.1039/d0ob00077a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient palladium catalyzed diastereoselective addition of arylboronic acids to complex spirocyclopropyl dinitriles is developed in the presence of a catalytic amount of 4-dodecylbenzenesulphonic acid (DBSA) as a Brønsted acid surfactant in aqueous media. The protocol is also found to be highly effective when different types of nitrile compounds and organo-boron compounds are used. The overall reaction has been found to be very cost efficient since it requires low catalyst loading, mild thermal energy and short reaction time. Wide substrate scope, operational simplicity, good to excellent product yield, and use of green solvents make the reaction a practical route to transform nitrile into a keto functionality in biorelevant heterocyclic scaffolds. The scale-up synthesis of the target scaffolds can also be achieved with ease which also signifies the practicability of this protocol.
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Affiliation(s)
- Dwaipayan Das
- Department of Chemistry, University of Calcutta 92, A. P. C. Road, Kolkata-700009, India.
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48
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Li Z, Yu B. HFIP-Promoted de Novo Synthesis of Biologically Relevant Nonnatural α-Arylated Amino Esters and Dipeptide Mimetics. Chemistry 2019; 25:16528-16532. [PMID: 31617627 DOI: 10.1002/chem.201904395] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/15/2019] [Indexed: 01/24/2023]
Abstract
Amino acids are fundamental building blocks, which have been extensively used in drug design and organic synthesis. However, nonnatural amino acids are relatively less studied. In this work, the authors report the first HFIP-promoted de novo synthesis of nonnatural α-arylated amino esters and dipeptide mimetics (27 examples, up to 99 % yield) from readily available amines, ethyl glyoxylate and electron-rich arenes under mild conditions, in which one C-C bond, one C-N bond and one chiral center were established simultaneously. The reaction was also performed on a gram scale, giving compound 4 a in 96 % yield. In addition, this protocol was successfully applied to the late-stage elaboration of drug molecules, such as tranylcypromine (TCP or PCPA) and troxipide. Interestingly, compound 4 h inactivated histone lysine specific demethylase 1 (LSD1) potently with an IC50 value of 0.296 μm. To the best of our knowledge, compound 4 h is the first LSD1 inhibitor derived from nonnatural α-arylated amino esters, and therefore could be used as a hit compound for the development of new LSD1 inhibitors. The synthesized nonnatural α-arylated amino esters and dipeptide mimetics as unique building blocks may have potential synthetic utilities.
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Affiliation(s)
- Zhonghua Li
- Scientific Research Center & Laboratory Animal Center, Henan University of Chinese Medicine, 156 Jinshui East Road, 450046, Zhengzhou, Henan, P. R. China
| | - Bin Yu
- School of Pharmaceutical Sciences, Zhengzhou University, 100 Science Avenue, 450001, Zhengzhou, Henan, P. R. China.,State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, P. R. China
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49
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Friedel-Crafts trifluoromethylthiolation of electron-rich (hetero)arenes with trifluoromethylthio-saccharin in 2,2,2-trifluoroethanol (TFE). CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.07.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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50
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Bhujabal YB, Vadagaonkar KS, Gholap A, Sanghvi YS, Dandela R, Kapdi AR. HFIP Promoted Low-Temperature SNAr of Chloroheteroarenes Using Thiols and Amines. J Org Chem 2019; 84:15343-15354. [DOI: 10.1021/acs.joc.9b02371] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yuvraj B. Bhujabal
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai 400019, India
| | - Kamlesh S. Vadagaonkar
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai 400019, India
| | - Aniket Gholap
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai 400019, India
| | - Yogesh S. Sanghvi
- Rasayan Incorporation, 2802, Crystal Ridge Road, Encinitas, California 92024-6615, United States
| | - Rambabu Dandela
- Department of Chemistry, Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, MouzaSamantpuri, Bhubaneswar 751013, Odisha, India
| | - Anant R. Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai 400019, India
- Department of Chemistry, Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, MouzaSamantpuri, Bhubaneswar 751013, Odisha, India
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