1
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Dos Santos T, Orenha HP, Murie VE, Vessecchi R, Clososki GC. Selective Metalation and Functionalization of Fluorinated Nitriles Using 2,2,6,6-Tetramethylpiperidyl Bases. Org Lett 2021; 23:7396-7400. [PMID: 34499518 DOI: 10.1021/acs.orglett.1c02572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have accomplished regioselective deprotometalation of aromatic and heteroaromatic nitriles via (TMP)2Zn·2MgCl2·2LiCl and TMPMgCl·LiCl (TMP = 2,2,6,6-tetramethylpiperidyl) with the exploration of new and scarcely investigated metalation positions. Regioselectivity was rationalized by DFT calculations. The quenching of the generated organozinc and organomagnesium intermediates with various electrophiles gave access to 47 highly functionalized nitriles with yields up to 95%. Additionally, we report a difunctionalization strategy and the use of functionalized nitriles as building blocks to construct relevant heterocycles.
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Affiliation(s)
- Thiago Dos Santos
- Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-903, Brazil
| | - Henrique P Orenha
- Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-903, Brazil
| | - Valter E Murie
- Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-903, Brazil
| | - Ricardo Vessecchi
- Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-903, Brazil
| | - Giuliano C Clososki
- Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-903, Brazil
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2
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Seifinoferest B, Tanbakouchian A, Larijani B, Mahdavi M. Ullmann‐Goldberg and Buchwald‐Hartwig C−N Cross Couplings: Synthetic Methods to Pharmaceutically Potential N‐Heterocycles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100072] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Behnoush Seifinoferest
- Endocrinology and Metabolism Research Centre Tehran University of Medical Sciences University of Tehran Nejatollahi St Enghelab St Iran
| | - Arezoo Tanbakouchian
- Department of Chemistry, College of Chemistry University of Tehran 16 Azar St Enghelab St Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Centre Tehran University of Medical Sciences University of Tehran Nejatollahi St Enghelab St Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Centre Tehran University of Medical Sciences University of Tehran Nejatollahi St Enghelab St Iran
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3
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Oshimoto K, Zhou B, Tsuji H, Kawatsura M. Synthesis of substituted benzo[b][1,4]oxazepine derivatives by the reaction of 2-aminophenols with alkynones. Org Biomol Chem 2020; 18:415-419. [DOI: 10.1039/c9ob02450f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We have developed a novel synthetic method accessing benzo[b][1,4]oxazepines that are one of the rare classes of benzoxazepine derivatives by reaction of 2-aminophenols with alkynones in 1,4-dioxane at 100 °C.
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Affiliation(s)
- Kohei Oshimoto
- Department of Chemistry
- College of Humanities & Sciences
- Nihon University
- Tokyo 156-8550
- Japan
| | - Biao Zhou
- Department of Chemistry
- College of Humanities & Sciences
- Nihon University
- Tokyo 156-8550
- Japan
| | - Hiroaki Tsuji
- Department of Chemistry
- College of Humanities & Sciences
- Nihon University
- Tokyo 156-8550
- Japan
| | - Motoi Kawatsura
- Department of Chemistry
- College of Humanities & Sciences
- Nihon University
- Tokyo 156-8550
- Japan
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4
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Taily IM, Saha D, Banerjee P. Palladium-catalyzed regio- and stereoselective access to allyl ureas/carbamates: facile synthesis of imidazolidinones and oxazepinones. Org Biomol Chem 2020; 18:6564-6570. [PMID: 32789352 DOI: 10.1039/d0ob01514h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Typically, transition metal catalysis enforces the stereodefined outcome of a reaction. Here we disclose the palladium-catalyzed regio- and stereoselective access to allylic ureas/carbamates and their further exploitation to diverse cyclic structures under operationally simple reaction conditions. This protocol features palladium-catalyzed decarboxylative amidation of highly modular VECs with good to excellent yield, minimal waste production, wide substrate scope, and low catalyst loading. In follow-up chemistry, we demonstrated the debenzylation of vinylic imidazolidinones to N-hydroxycyclic ureas and regioselective derivatization towards the facile synthesis of halohydrins and oxiranes under mild reaction conditions in good to excellent yields.
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Affiliation(s)
- Irshad Maajid Taily
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India.
| | - Debarshi Saha
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India.
| | - Prabal Banerjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India.
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5
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Shaabani S, Shaabani A, Kucerakova M, Dusek M. A One-Pot Synthesis of Oxazepine-Quinazolinone bis-Heterocyclic Scaffolds via Isocyanide-Based Three-Component Reactions. Front Chem 2019; 7:623. [PMID: 31620422 PMCID: PMC6759581 DOI: 10.3389/fchem.2019.00623] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 08/29/2019] [Indexed: 11/22/2022] Open
Abstract
A novel, efficient and environmentally friendly approach has been developed for the synthesis of biologically important bis-heterocyclic oxazepine-quinazolinone derivatives. The structurally interesting compounds of high purity were synthesized by a one-pot three-component reaction of 2-(2-formylphenoxy) acetic acid and 2-aminobenzamide as bifunctional reagents and an isocyanide without using any catalyst, with excellent overall yields.
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Affiliation(s)
| | - Ahmad Shaabani
- Faculty of Chemistry, Shahid Beheshti University, Tehran, Iran
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6
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Mirza B, Mirzazadeh R, Zeeb M. A New and Efficient Synthesis of 2-Aminobenzothiazoles Derivatives from O-nitroaniline. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/174751913x13848836801606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Behrooz Mirza
- Department of Applied Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
| | | | - Mohsen Zeeb
- Department of Applied Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
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7
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Jamsheena V, Mahesha CK, Joy MN, Lankalapalli RS. Metal-Free Diaryl Etherification of Tertiary Amines by Ortho-C(sp2)–H Functionalization for Synthesis of Dibenzoxazepines and -ones. Org Lett 2017; 19:6614-6617. [DOI: 10.1021/acs.orglett.7b03328] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Vellekkatt Jamsheena
- Chemical Sciences and Technology
Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - Chikkagundagal K. Mahesha
- Chemical Sciences and Technology
Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - M. Nibin Joy
- Chemical Sciences and Technology
Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - Ravi S. Lankalapalli
- Chemical Sciences and Technology
Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
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8
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Costil R, Dale HJA, Fey N, Whitcombe G, Matlock JV, Clayden J. Heavily Substituted Atropisomeric Diarylamines by Unactivated Smiles Rearrangement of
N
‐Aryl Anthranilamides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706341] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Romain Costil
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Harvey J. A. Dale
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Natalie Fey
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - George Whitcombe
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | | | - Jonathan Clayden
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
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9
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Costil R, Dale HJA, Fey N, Whitcombe G, Matlock JV, Clayden J. Heavily Substituted Atropisomeric Diarylamines by Unactivated Smiles Rearrangement of
N
‐Aryl Anthranilamides. Angew Chem Int Ed Engl 2017; 56:12533-12537. [DOI: 10.1002/anie.201706341] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 08/16/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Romain Costil
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Harvey J. A. Dale
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Natalie Fey
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - George Whitcombe
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | | | - Jonathan Clayden
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
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10
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Li Y, Meng JP, Lei J, Chen ZZ, Tang DY, Zhu J, Zhang J, Xu ZG. Efficient Synthesis of Fused Oxazepino-isoquinoline Scaffolds via an Ugi, Followed by an Intramolecular Cyclization. ACS COMBINATORIAL SCIENCE 2017; 19:324-330. [PMID: 28271876 DOI: 10.1021/acscombsci.7b00002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mild and efficient protocol was developed for the synthesis of oxazepino-isoquinolines via a one-pot Ugi four-component reaction, followed by the intramolecular addition of the resulting alcohol to an alkyne moiety under microwave irradiation conditions. Notably, this process only required one purification step, providing facile access to two series of complex and potentially interesting biologically active scaffolds.
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Affiliation(s)
- Yong Li
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
- Key
Laboratory for Asymmetric Synthesis and Chiral Technology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences. Chengdu 610041, China
| | - Jiang-Ping Meng
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
| | - Jie Lei
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
- Key
Laboratory for Asymmetric Synthesis and Chiral Technology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences. Chengdu 610041, China
| | - Zhong-Zhu Chen
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
| | - Dian-Yong Tang
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
| | - Jin Zhu
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
- Key
Laboratory for Asymmetric Synthesis and Chiral Technology of Sichuan
Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences. Chengdu 610041, China
| | - Jin Zhang
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
| | - Zhi-Gang Xu
- Chongqing
Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing
Key Laboratory of Kinase Modulators as Innovative Medicine, IATTI, Chongqing University of Arts and Sciences, 319 Honghe Avenue, Yongchuan, Chongqing 402160, China
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11
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Facile one-pot tandem synthesis of perfluoroalkylated indolizines under metal-free mild conditions. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Zhu T, Xiang J. Trifluoroacetic Acid-Mediated Nucleophilic Substitution/Smiles Rearrangement Cascade Reaction: An Alternative Approach to Constructing Pyrrole-Fused Dihydropteridines. Chem Heterocycl Compd (N Y) 2016. [DOI: 10.1007/s10593-016-1973-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Shi J, Wu J, Cui C, Dai WM. Microwave-Assisted Intramolecular Ullmann Diaryl Etherification as the Post-Ugi Annulation for Generation of Dibenz[b,f][1,4]oxazepine Scaffold. J Org Chem 2016; 81:10392-10403. [DOI: 10.1021/acs.joc.6b01398] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jianyu Shi
- Laboratory
of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. of China
| | - Jinlong Wu
- Laboratory
of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. of China
| | - Chengsen Cui
- Laboratory
of Advanced Catalysis and Synthesis, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. of China
| | - Wei-Min Dai
- Laboratory
of Asymmetric Catalysis and Synthesis, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. of China
- Laboratory
of Advanced Catalysis and Synthesis, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. of China
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14
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Chen CL, Lee CC, Liu FL, Chen TC, Ahmed Ali AA, Chang DM, Huang HS. Design, synthesis and SARs of novel salicylanilides as potent inhibitors of RANKL-induced osteoclastogenesis and bone resorption. Eur J Med Chem 2016; 117:70-84. [PMID: 27089213 DOI: 10.1016/j.ejmech.2016.04.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/02/2016] [Accepted: 04/04/2016] [Indexed: 01/28/2023]
Abstract
Inhibiting osteoclastogenesis is a promising therapeutic target for treating osteoclast-related diseases. Herein, we synthesized a series of modified salicylanilides and their corresponding 3-phenyl-2H-benzo[e][1,3]oxazine-2,4(3H)-dione and 10-phenyldibenzo[b,f][1,4]oxazepin-11(10H)-one derivatives, and investigated the effects of such compounds on RANKL-induced osteoclast formation. Among them, a salicylanilide derivative (A04) and its 3-phenyl-2H-benzo[e][1,3]oxazine-2,4(3H)-dione derivative (B04) markedly suppressed RANKL-induced osteoclast differentiation and showed no significant cytotoxic effects at doses higher than that required to inhibit osteoclast formation. Both compounds reduced osteoclast formation and bone resorptive activity of osteoclasts in a dose-dependent manner. Further, the anti-osteoclastogenic effects of A04 and B04 may operate through reducing the RANKL-induced nuclear translocation of NFATc1. Accordingly, we present the potent anti-osteoclastogenic compounds A04 and B04 as promising candidates for further optimization as anti-resorptive agents.
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Affiliation(s)
- Chun-Liang Chen
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan, ROC; School of Pharmacy, National Defense Medical Center, Taipei 114, Taiwan, ROC
| | - Chia-Chung Lee
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan, ROC; School of Pharmacy, National Defense Medical Center, Taipei 114, Taiwan, ROC
| | - Fei-Lan Liu
- Rheumatology/Immunology/Allergy, Taipei Veterans General Hospital, Taipei 112, Taiwan, ROC
| | - Tsung-Chih Chen
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan, ROC; School of Pharmacy, National Defense Medical Center, Taipei 114, Taiwan, ROC
| | - Ahmed Atef Ahmed Ali
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan, ROC; Taiwan International Graduate Program, Molecular and Cell Biology Program, Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan, ROC
| | - Deh-Ming Chang
- Rheumatology/Immunology/Allergy, Taipei Veterans General Hospital, Taipei 112, Taiwan, ROC; Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan, ROC.
| | - Hsu-Shan Huang
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan, ROC; School of Pharmacy, National Defense Medical Center, Taipei 114, Taiwan, ROC; Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan, ROC.
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15
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Zhou Y, Zhu J, Li B, Zhang Y, Feng J, Hall A, Shi J, Zhu W. Access to Different Isomeric Dibenzoxazepinones through Copper-Catalyzed C–H Etherification and C–N Bond Construction with Controllable Smiles Rearrangement. Org Lett 2016; 18:380-3. [DOI: 10.1021/acs.orglett.5b03378] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yunfei Zhou
- CAS Key Laboratory
of Receptor Research, Drug Discovery and Design Center, Shanghai Institute
of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
| | - Jianming Zhu
- CAS Key Laboratory
of Receptor Research, Drug Discovery and Design Center, Shanghai Institute
of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
| | - Bo Li
- CAS Key Laboratory
of Receptor Research, Drug Discovery and Design Center, Shanghai Institute
of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
| | - Yong Zhang
- CAS Key Laboratory
of Receptor Research, Drug Discovery and Design Center, Shanghai Institute
of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
| | - Jia Feng
- CAS Key Laboratory
of Receptor Research, Drug Discovery and Design Center, Shanghai Institute
of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
| | - Adrian Hall
- UCB Biopharma SPRL, Chemin du Foriest, Braine-l’Alleud, Belgium
| | - Jiye Shi
- UCB Biopharma SPRL, Chemin du Foriest, Braine-l’Alleud, Belgium
- Kellogg College, University of Oxford, 60-62 Banbury Road, Oxford, OX2 6PN, United Kingdom
| | - Weiliang Zhu
- CAS Key Laboratory
of Receptor Research, Drug Discovery and Design Center, Shanghai Institute
of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
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16
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Hu F, Liu H, Jia J, Ma C. Transition-metal-free synthesis of indole-fused dibenzo[b,f][1,4]oxazepines via Smiles rearrangement. Org Biomol Chem 2016; 14:11076-11079. [DOI: 10.1039/c6ob02098d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A one-pot transition-metal-free approach for the synthesis of indole-fused dibenzo[b,f][1,4]oxazepines from 2-(1H-indol-2-yl)phenol and 1,2-dihalobenzenes or 2 halonitroarenes has been developed.
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Affiliation(s)
- Fangdong Hu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- P. R. China
| | - Huanhuan Liu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- P. R. China
| | - Jiong Jia
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- P. R. China
| | - Chen Ma
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- P. R. China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
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17
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Zhang Z, Dai Z, Ma X, Liu Y, Ma X, Li W, Ma C. Cu-catalyzed one-pot synthesis of fused oxazepinone derivatives via sp2 C–H and O–H cross-dehydrogenative coupling. Org Chem Front 2016. [DOI: 10.1039/c6qo00040a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Cu-catalyzed cascade reaction protocol was developed for the synthesis of fused oxazepinone derivatives via sp2 C–H and O–H cross-dehydrogenative coupling.
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Affiliation(s)
- Zeyuan Zhang
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Zhen Dai
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Xinkun Ma
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Yihan Liu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Xiaojun Ma
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Wanli Li
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Chen Ma
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
- State Key Laboratory of Natural and Biomimetic Drugs
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18
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Fugard AJ, Thompson BK, Slawin AMZ, Taylor JE, Smith AD. Organocatalytic Synthesis of Fused Bicyclic 2,3-Dihydro-1,3,4-oxadiazoles through an Intramolecular Cascade Cyclization. Org Lett 2015; 17:5824-7. [PMID: 26598296 DOI: 10.1021/acs.orglett.5b02997] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hydrazone-carboxylic acids undergo intramolecular cyclization in the presence of pivaloyl chloride, iPr(2)NEt, and catalytic DABCO to form a range of substituted fused tricyclic 2,3-dihydro-1,3,4-oxadiazoles in high yields.
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Affiliation(s)
- Alison J Fugard
- EaStCHEM, School of Chemistry, University of St. Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
| | - Bethany K Thompson
- EaStCHEM, School of Chemistry, University of St. Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St. Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St. Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St. Andrews , North Haugh, St. Andrews, KY16 9ST, U.K
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19
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Liu S, Zhu S, Wu Y, Gao J, Qian P, Hu Y, Shi L, Chen S, Zhang S, Zhang Y. One-Pot Synthesis ofN-Aryl-Nicotinamides and Diarylamines Based on a Tunable Smiles Rearrangement. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500222] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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20
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An efficient cascade approach to dibenzoxazepinones via nucleophilic aromatic substitution and Smiles rearrangement. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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22
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Zhang E, Zhang X, Wei W, Wang D, Cai Y, Xu T, Yan M, Zou Y. A biomass-involved strategy for the synthesis of N-arylated dibenzo[b,e][1,4]oxazepin-11(5H)-ones, acridones, 7,12-dihydrodibenzo[b,e][1,4]oxazocin-6H-ones and dibenzo[b,f]azepin-10(11H)-ones. RSC Adv 2015. [DOI: 10.1039/c4ra12479k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A chemo- and regio-selective method for the construction of benzo-fused six- to eight-membered N-heterocycles from renewable feedstock shikimic acid is described.
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Affiliation(s)
- Ensheng Zhang
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
- Guangzhou Institute of Chemistry
| | - Xuejing Zhang
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Wen Wei
- Guangzhou Institute of Chemistry
- Chinese Academy of Science
- Guangzhou
- P. R. China
| | - Dejian Wang
- Guangzhou Institute of Chemistry
- Chinese Academy of Science
- Guangzhou
- P. R. China
- University of Chinese Academy of Sciences
| | - Yuchen Cai
- Sun Yat-sen University Cancer Center
- State Key Laboratory of Oncology in South China
- Collaborative Innovation Center for Cancer Medicine
- Guangzhou
- P. R. China
| | - Tianlong Xu
- Guangzhou Institute of Chemistry
- Chinese Academy of Science
- Guangzhou
- P. R. China
- University of Chinese Academy of Sciences
| | - Ming Yan
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Yong Zou
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou
- P. R. China
- Guangzhou Institute of Chemistry
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23
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Guo X, Zhang-Negrerie D, Du Y. Iodine(iii)-mediated construction of the dibenzoxazepinone skeleton from 2-(aryloxy)benzamides through oxidative C–N formation. RSC Adv 2015. [DOI: 10.1039/c5ra20258b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dibenzoxazepinone compounds were conveniently synthesized from 2-(aryloxy)benzamides through hypervalent iodine(iii)-mediated oxidative cyclization under mild reaction conditions.
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Affiliation(s)
- Xuliang Guo
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Daisy Zhang-Negrerie
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Yunfei Du
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
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24
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Zhang Z, Xie C, Tan X, Song G, Wen L, Gao H, Ma C. I2-catalyzed one-pot synthesis of pyrrolo[1,2-a]quinoxaline and imidazo[1,5-a]quinoxaline derivatives via sp3and sp2C–H cross-dehydrogenative coupling. Org Chem Front 2015. [DOI: 10.1039/c5qo00124b] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient I2-catalyzed cascade coupling protocol was developed for the synthesis of pyrrolo[1,2-a]quinoxaline and imidazo[1,5-a]quinoxaline derivativesviasp3and sp2C–H cross-dehydrogenative coupling.
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Affiliation(s)
- Zeyuan Zhang
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Caixia Xie
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Xiaochen Tan
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Gaolei Song
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Leilin Wen
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - He Gao
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
| | - Chen Ma
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P R China
- State Key Laboratory of Natural and Biomimetic Drugs
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25
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Govindaraj J, Raja R, Suresh M, Raghunathan R, SubbiahPandi A. Crystal structures of methyl 3-phenyl-4,5-di-hydro-1H,3H-benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl-ate and methyl 1-methyl-3-phenyl-4,5-di-hydro-1H,3H-benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:316-8. [PMID: 25484732 PMCID: PMC4257324 DOI: 10.1107/s1600536814021655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 10/01/2014] [Indexed: 01/09/2023]
Abstract
The title compounds, C19H18N2O3, (I), and C20H20N2O3, (II), differ only by a methyl substituent on the seven-membered oxazepine ring in (II). In both compounds, these rings have a twist-chair conformation. The phenyl ring makes a dihedral angle of 73.42 (10)° with the benzimidazole ring system mean plane (r.m.s. deviation = 0.015 Å) in (I) and 83.07 (7)° in (II) (r.m.s. deviation = 0.026 Å). The methyl carboxyl-ate groups are planar to within 0.031 (2) in (I) and 0.003 (2) Å in (II). They are inclined to the phenyl and benzimidazole ring system by 33.78 (16) and 87.56 (14)°, respectively, in (I) and by 53.04 (12) and 60.22 (11)°, respectively, in (II). In the crystal of (I), mol-ecules stack in a herringbone fashion and are linked by C-H⋯O hydrogen bonds, forming chains along [100]. In the crystal of (II), there are no significant inter-molecular inter-actions present.
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Affiliation(s)
- J Govindaraj
- Department of Physics, Pachaiyappa's College for Men, Kanchipuram 631 501, India
| | - R Raja
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, India
| | - M Suresh
- Department of Organic Chemistry, University of Madras, Guindy campus, Chennai 602 025, India
| | - R Raghunathan
- Department of Organic Chemistry, University of Madras, Guindy campus, Chennai 602 025, India
| | - A SubbiahPandi
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, India
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26
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Hajishaabanha F, Shaabani A. Synthesis of oxazepin-quinoxaline bis-heterocyclic scaffolds via an efficient three component synthetic protocol. RSC Adv 2014. [DOI: 10.1039/c4ra08486a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Yang B, Tan X, Guo R, Chen S, Zhang Z, Chu X, Xie C, Zhang D, Ma C. Transition Metal-Free One-Pot Synthesis of Fused 1,4-Thiazepin-5(4H)-ones and Theoretical Study of the S–N Type Smiles Rearrangement Process. J Org Chem 2014; 79:8040-8. [DOI: 10.1021/jo5011729] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Bingchuan Yang
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Xiaochen Tan
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Ruiying Guo
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Shunwei Chen
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Zeyuan Zhang
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Xianglong Chu
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Caixia Xie
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Dongju Zhang
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, P. R. China
| | - Chen Ma
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, 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, Beijing 100050, P. R. China
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28
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Gawande SD, Kavala V, Zanwar MR, Kuo CW, Huang WC, Kuo TS, Huang HN, He CH, Yao CF. Synthesis of DibenzodiazepinonesviaTandem Copper(I)- Catalyzed CN Bond Formation. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Sapegin AV, Kalinin SA, Smirnov AV, Dorogov MV, Krasavin M. New tetracyclic 1,4-oxazepines constructed via practically simple tandem condensation strategy from readily available synthons. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Ganguly NC, Mondal P, Roy S, Mitra P. Ligand-free copper-catalyzed efficient one-pot access of benzo[b]pyrido[3,2-f][1,4]oxazepinones through O-heteroarylation-Smiles rearrangement-cyclization cascade. RSC Adv 2014. [DOI: 10.1039/c4ra11128a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
An optimized protocol towards synthesis of benzopyrido[1,4]oxazepinones of potential biological relevance is achieved by coupling of N-substituted-o-chloronicotinamides and o-halogenated naphthols/phenols.
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Affiliation(s)
- Nemai C. Ganguly
- Department of Chemistry
- University of Kalyani
- Kalyani 741235, India
| | - Pallab Mondal
- Department of Chemistry
- University of Kalyani
- Kalyani 741235, India
| | - Sushmita Roy
- Department of Chemistry
- University of Kalyani
- Kalyani 741235, India
| | - Partha Mitra
- Department of Inorganic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700032, India
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31
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Yang B, Huang Z, Guan H, Niu X, Li Y, Fang S, Ma C. New routes for the synthesis of fused pyrrole scaffolds through transition metal-free tandem reactions. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.08.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Niu X, Yang B, Li Y, Fang S, Huang Z, Xie C, Ma C. A transition metal-free tandem process to pyridazinopyrido[3,2-f][1,4]thiazepine-diones via Smiles rearrangement. Org Biomol Chem 2013; 11:4102-8. [PMID: 23674063 DOI: 10.1039/c3ob40719e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A transition metal-free methodology for the synthesis of pyridazinopyrido[3,2-f][1,4]thiazepine-diones was studied. The construction of this tricyclic system went through a one-pot coupling/Smiles rearrangement/cyclization process. The high yields of pure products were obtained through simple recrystallization.
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Affiliation(s)
- Xiaoyi Niu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, PR China
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33
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Zhao Y, Bai Y, Zhang Q, Chen Z, Dai Q, Ma C. A facile method for the synthesis of pyridazino[4,5-b][1,4]thiazine-diones via Smiles rearrangement. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.04.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Zhao Y, Dai Q, Chen Z, Zhang Q, Bai Y, Ma C. One pot regioselective synthesis of a small library of dibenzo[b,f][1,4]thiazepin-11(10H)-ones via Smiles rearrangement. ACS COMBINATORIAL SCIENCE 2013; 15:130-4. [PMID: 23316731 DOI: 10.1021/co300139s] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A facile and efficient method has been developed for the synthesis of a small library of dibenzo[b,f][1,4]thiazepin-11(10H)-ones via Smiles rearrangement. Compounds were obtained in excellent isolated yields (70%-92%) under metal-free conditions. More specifically, this transition metal-free process relates to an environmentally friendly, economical, and efficient method for preparing benzoic-fused seven-membered lactams.
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Affiliation(s)
- Yongmei Zhao
- School of
Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P R China
| | - Qiaoling Dai
- School of
Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P R China
| | - Zhi Chen
- School of
Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P R China
| | - Qihui Zhang
- School of
Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P R China
| | - Yongcheng Bai
- School of
Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P R China
| | - Chen Ma
- School of
Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P R China
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35
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Li Y, Yang B, Sun Y, Wang H, Li H, Fang S, Niu X, Ma C. A metal-free tandem cycloaddition strategy for the synthesis of indolizines from pyridine derivatives and γ-bromo-crotonates under mild conditions. RSC Adv 2013. [DOI: 10.1039/c3ra43613f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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36
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Liu Y, Zhang X, Ma Y, Ma C. An efficient C–C bond formation reaction for the synthesis of α-arylated ketones under mild conditions. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Zhao Y, Wu Y, Jia J, Zhang D, Ma C. One-Pot Synthesis of Benzo[1,4]thiazin-3(4H)-ones and a Theoretical Study of the S–N Type Smiles Rearrangement Mechanism. J Org Chem 2012; 77:8501-6. [DOI: 10.1021/jo3014287] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yongmei Zhao
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, People's Republic
of China
| | - Yanmiao Wu
- College of Chemistry, Chemical Engineering
and Materials Science, Shandong Normal University, Jinan 250100,
People's Republic of China
| | - Jiong Jia
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, People's Republic
of China
| | - Dongju Zhang
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, People's Republic
of China
| | - Chen Ma
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan 250100, People's Republic
of China
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38
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Kitching MO, Hurst TE, Snieckus V. Copper-Catalyzed Cross-Coupling Interrupted by an Opportunistic Smiles Rearrangement: An Efficient Domino Approach to Dibenzoxazepinones. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201106786] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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39
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Kitching MO, Hurst TE, Snieckus V. Copper-catalyzed cross-coupling interrupted by an opportunistic Smiles rearrangement: an efficient domino approach to dibenzoxazepinones. Angew Chem Int Ed Engl 2012; 51:2925-9. [PMID: 22311826 DOI: 10.1002/anie.201106786] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Matthew O Kitching
- Department of Chemistry, Queen's University, Kingston, Ontario, K7L 3N6 Canada
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40
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Ryan JH, Hyland C, Meyer AG, Smith JA, Yin J. Seven-Membered Rings. PROGRESS IN HETEROCYCLIC CHEMISTRY 2012. [DOI: 10.1016/b978-0-08-096807-0.00016-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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41
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Zhan C, Jia J, Yang B, Huang A, Liu Y, Ma C. A tandem coupling/smiles rearrangement/cyclization approach to 1,4-benzooxazinones or 1,4-pyridooxazinones under mild conditions. RSC Adv 2012. [DOI: 10.1039/c2ra20334k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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42
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Zhang X, Jia J, Ma C. A one-pot regioselective synthesis of benzo[d]imidazo[2,1-b]thiazoles. Org Biomol Chem 2012; 10:7944-8. [DOI: 10.1039/c2ob26211h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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