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Porras-Santos LF, Sandoval-Lira J, Hernández-Pérez JM, Quintero L, López-Mendoza P, Sartillo-Piscil F. Ferrier Glycosylation Mediated by the TEMPO Oxoammonium Cation. J Org Chem 2024; 89:11281-11292. [PMID: 39102649 DOI: 10.1021/acs.joc.4c00978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
The TEMPO oxoammonium cation has been proven to be both an efficient oxidizing reagent and an electrophilic substrate frequently found in organic reactions. Here, we report that this versatile chemical reagent can also be used as an efficient promoter for C- and N-glycosylation reactions through a Ferrier rearrangement with moderate to high yields. This unprecedented reactivity is explained in terms of a Lewis acid activation of glycal by TEMPO+ forming a type of glycal-TEMPO+ mesomeric structure, which occurs through an extended vinylogous hyperconjugation toward the π*(O═N+) orbital [LP(O1) → π*(C1═C2), π*(C1═C2) → σ*(C3-O3), and LP(O6) → π*(O═N+)]. This enables the formation of the respective Ferrier glycosyl cation, which is trapped by various nucleophiles. The extended hyperconjugation (or double hyperconjugation) toward the π*(O═N+) orbital, which confers the Lewis acid character of the TEMPO cation, was supported by natural bond orbital analysis at the M06-2X/6-311+G** level of theory.
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Affiliation(s)
- Luis F Porras-Santos
- Centro de Investigación de la Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla (BUAP), 14 Sur Esq. San Claudio, Col. San Manuel 72570, Puebla, Mexico
| | - Jacinto Sandoval-Lira
- Departamento de Ciencias Básicas, TecNM campus Instituto Tecnológico Superior de San Martín Texmelucan, Camino a la Barranca de Pesos, San Martín Texmelucan 74120, Puebla, Mexico
| | - Julio M Hernández-Pérez
- Centro de Investigación de la Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla (BUAP), 14 Sur Esq. San Claudio, Col. San Manuel 72570, Puebla, Mexico
| | - Leticia Quintero
- Centro de Investigación de la Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla (BUAP), 14 Sur Esq. San Claudio, Col. San Manuel 72570, Puebla, Mexico
| | - Pedro López-Mendoza
- Centro de Investigación de la Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla (BUAP), 14 Sur Esq. San Claudio, Col. San Manuel 72570, Puebla, Mexico
| | - Fernando Sartillo-Piscil
- Centro de Investigación de la Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla (BUAP), 14 Sur Esq. San Claudio, Col. San Manuel 72570, Puebla, Mexico
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2
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Pan J, Wang J, Li K, Dai X, Li Q, Chong D, Chen B, Yan J, Wang H. Efficient molecular doping of polymeric semiconductors improved by coupled reaction. Nat Commun 2024; 15:5854. [PMID: 38997309 PMCID: PMC11245478 DOI: 10.1038/s41467-024-50293-1] [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: 02/15/2024] [Accepted: 07/05/2024] [Indexed: 07/14/2024] Open
Abstract
Exploring chemical doping method to improve the electrical conductivity of polymers is still very attractive for researchers. In this work, we report a developed method of doping a polymer semiconductor aided by the coupled reaction that commonly exists in biological systems where a non-spontaneous reaction is driven by a spontaneous reaction. During the doping process, the chemical reaction between the dopant and the polymer is promoted by introducing a thermodynamically favorable reaction via adding additives that are highly reactive to the reduction product of the dopant to form a coupled reaction, thus significantly improving the electrical conductivity of polymers by 3-7 orders. This coupled reaction doping process shows the potential of wide applications in exploring efficient doping systems to prepare functional conducting polymers, which could be a powerful tool for modern organic electronics.
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Affiliation(s)
- Jiahao Pan
- State Key Laboratory of Multiphase Flow in Power Engineering & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Jing Wang
- State Key Laboratory of Multiphase Flow in Power Engineering & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
- School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Kuncai Li
- State Key Laboratory of Multiphase Flow in Power Engineering & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Xu Dai
- State Key Laboratory of Multiphase Flow in Power Engineering & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Qing Li
- College of Chemistry and Chemical Engineering, Dezhou University, Dezhou, Shandong, China
| | - Daotong Chong
- School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Bin Chen
- School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Junjie Yan
- School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Hong Wang
- State Key Laboratory of Multiphase Flow in Power Engineering & Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China.
- School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China.
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3
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Wang Y, Liu J, Sun W, Zhou Y, Wang X, Hu Q, Wen Z, Yao J, Li H. Oxygenation of Phenols with Water as the Oxygen Source and Oxoammonium Salt as the Oxidant. J Org Chem 2024; 89:2440-2447. [PMID: 38306296 DOI: 10.1021/acs.joc.3c02448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
Aromatic C-H oxygenation is important in both industrial production and organic synthesis. Here we report a metal-free approach for phenol oxygenation with water as the oxygen source using oxoammonium salts as the renewable oxidant. Employing this protocol, various alkyl-substituted phenols were converted into benzoquinones in yields of 59-98%. On the basis of 18O-labeling and kinetic studies, the hydroxy-oxoammonium adduct was proposed to attack the aromatic ring similarly to electrophilic aromatic substitution. We suppose that the findings described here not only provide an efficient and highly selective protocol for aromatic C-H oxygenation but also may encourage further developments of possible transition-metal-free catalytic methods.
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Affiliation(s)
- Yongtao Wang
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
- Center of Chemistry for Frontier Technologies, ZJU-NHU United R&D Center, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Jiaxin Liu
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Wenjing Sun
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Yujia Zhou
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Xinyu Wang
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Qixuan Hu
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Zeyu Wen
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Jia Yao
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
- Center of Chemistry for Frontier Technologies, ZJU-NHU United R&D Center, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
| | - Haoran Li
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
- Center of Chemistry for Frontier Technologies, ZJU-NHU United R&D Center, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Rd, Hangzhou 310058, China
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4
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Abstract
Nitroxides, also known as nitroxyl radicals, are long-lived or stable radicals with the general structure R1R2N-O•. The spin distribution over the nitroxide N and O atoms contributes to the thermodynamic stability of these radicals. The presence of bulky N-substituents R1 and R2 prevents nitroxide radical dimerization, ensuring their kinetic stability. Despite their reactivity toward various transient C radicals, some nitroxides can be easily stored under air at room temperature. Furthermore, nitroxides can be oxidized to oxoammonium salts (R1R2N═O+) or reduced to anions (R1R2N-O-), enabling them to act as valuable oxidants or reductants depending on their oxidation state. Therefore, they exhibit interesting reactivity across all three oxidation states. Due to these fascinating properties, nitroxides find extensive applications in diverse fields such as biochemistry, medicinal chemistry, materials science, and organic synthesis. This review focuses on the versatile applications of nitroxides in organic synthesis. For their use in other important fields, we will refer to several review articles. The introductory part provides a brief overview of the history of nitroxide chemistry. Subsequently, the key methods for preparing nitroxides are discussed, followed by an examination of their structural diversity and physical properties. The main portion of this review is dedicated to oxidation reactions, wherein parent nitroxides or their corresponding oxoammonium salts serve as active species. It will be demonstrated that various functional groups (such as alcohols, amines, enolates, and alkanes among others) can be efficiently oxidized. These oxidations can be carried out using nitroxides as catalysts in combination with various stoichiometric terminal oxidants. By reducing nitroxides to their corresponding anions, they become effective reducing reagents with intriguing applications in organic synthesis. Nitroxides possess the ability to selectively react with transient radicals, making them useful for terminating radical cascade reactions by forming alkoxyamines. Depending on their structure, alkoxyamines exhibit weak C-O bonds, allowing for the thermal generation of C radicals through reversible C-O bond cleavage. Such thermally generated C radicals can participate in various radical transformations, as discussed toward the end of this review. Furthermore, the application of this strategy in natural product synthesis will be presented.
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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Ravindar L, Hasbullah SA, Hassan NI, Qin HL. Cross‐Coupling of C‐H and N‐H Bonds: a Hydrogen Evolution Strategy for the Construction of C‐N Bonds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lekkala Ravindar
- Universiti Kebangsaan Malaysia Fakulti Teknologi dan Sains Maklumat Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Siti Aishah Hasbullah
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Nurul Izzaty Hassan
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Hua-Li Qin
- Wuhan University of Technology School of Chemistry 430070 Hubei CHINA
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6
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Wang J, Tu C, Feng ML, Li N. TEMPO/PhI(OAc) 2-Mediated Direct Sulfoximination of Benzoxazoles under Metal-Free Conditions. CHEM LETT 2022. [DOI: 10.1246/cl.220177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jian Wang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of pharmacy, Chengdu University, Chengdu, 610106, P. R. China
| | - Changqing Tu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of pharmacy, Chengdu University, Chengdu, 610106, P. R. China
| | - Mei-Lin Feng
- Key Laboratory of Coarse Cereal Processing of Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu 610106, China
| | - Nan Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of pharmacy, Chengdu University, Chengdu, 610106, P. R. China
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7
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Roy SK, Purkait A, Shome R, Das S, Das D, Ghosh SS, Jana CK. Proline selective labeling via on-site construction of naphthoxazole (NapOx). Chem Commun (Camb) 2022; 58:5909-5912. [PMID: 35475487 DOI: 10.1039/d2cc01268e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemoselective construction of naphthoxazoles (NapOx) via a three-component annulation reaction enables proline selective labeling of peptides in solution or in solid-phase synthesis. The fluorogenic peptides possess low cytotoxicity, efficient cell membrane permeability and excellent bioimaging potential for biomedical applications.
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Affiliation(s)
- Subhra Kanti Roy
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Anisha Purkait
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Rajib Shome
- Department of Biosciences and Engineering, Indian Institute of Technology Guwahati, 781039, India
| | - Saurav Das
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Debapratim Das
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
| | - Siddhartha Sankar Ghosh
- Department of Biosciences and Engineering, Indian Institute of Technology Guwahati, 781039, India
| | - Chandan K Jana
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, India.
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8
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Microwave assisted one pot synthesis of 2-alkyl amino benzimidazoles, 2-alkyl amino benzoxazoles and 2-alkyl amino benzthiazoles by using various carbodiimides. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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9
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Ibrahim K, Saranya PV, Anilkumar G. Recent Advances and Prospects in the Amination of Benzoxazoles. ChemistrySelect 2022. [DOI: 10.1002/slct.202200601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kaliyathodi Ibrahim
- School of Chemical Sciences Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala INDIA 686560
| | - Padinjare Veetil Saranya
- School of Chemical Sciences Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala INDIA 686560
| | - Gopinathan Anilkumar
- School of Chemical Sciences Mahatma Gandhi University Priyadarsini Hills P O Kottayam Kerala INDIA 686560
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10
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Iwabuchi Y, Nagasawa S. The Utility of Oxoammonium Species in Organic Synthesis: Beyond Alcohol Oxidation. HETEROCYCLES 2022. [DOI: 10.3987/rev-21-sr(r)2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Nunes PSG, da Silva G, Nascimento S, Mantoani SP, de Andrade P, Bernardes ES, Kawano DF, Leopoldino AM, Carvalho I. Synthesis, biological evaluation and molecular docking studies of novel 1,2,3-triazole-quinazolines as antiproliferative agents displaying ERK inhibitory activity. Bioorg Chem 2021; 113:104982. [PMID: 34020277 DOI: 10.1016/j.bioorg.2021.104982] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 04/23/2021] [Accepted: 05/05/2021] [Indexed: 12/24/2022]
Abstract
ERK1/2 inhibitors have attracted special attention concerning the ability of circumventing cases of innate or log-term acquired resistance to RAF and MEK kinase inhibitors. Based on the 4-aminoquinazoline pharmacophore of kinases, herein we describe the synthesis of 4-aminoquinazoline derivatives bearing a 1,2,3-triazole stable core to bridge different aromatic and heterocyclic rings using copper-catalysed azide-alkyne cycloaddition reaction (CuAAC) as a Click Chemistry strategy. The initial screening of twelve derivatives in tumoral cells (CAL-27, HN13, HGC-27, and BT-20) revealed that the most active in BT-20 cells (25a, IC50 24.6 μM and a SI of 3.25) contains a more polar side chain (sulfone). Furthermore, compound 25a promoted a significant release of lactate dehydrogenase (LDH), suggesting the induction of cell death by necrosis. In addition, this compound induced G0/G1 stalling in BT-20 cells, which was accompanied by a decrease in the S phase. Western blot analysis of the levels of p-STAT3, p-ERK, PARP, p53 and cleaved caspase-3 revealed p-ERK1/2 and p-STA3 were drastically decreased in BT-20 cells under 25a incubation, suggesting the involvement of these two kinases in the mechanisms underlying 25a-induced cell cycle arrest, besides loss of proliferation and viability of the breast cancer cell. Molecular docking simulations using the ERK-ulixertinib crystallographic complex showed compound 25a could potentially compete with ATP for binding to ERK in a slightly higher affinity than the reference ERK1/2 inhibitor. Further in silico analyses showed comparable toxicity and pharmacokinetic profiles for compound 25a in relation to ulixertinib.
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Affiliation(s)
| | - Gabriel da Silva
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Sofia Nascimento
- Radiopharmacy Center, Nuclear and Energy Research Institute (IPEN/CNEN-SP), São Paulo, São Paulo, Brazil
| | | | - Peterson de Andrade
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Emerson Soares Bernardes
- Radiopharmacy Center, Nuclear and Energy Research Institute (IPEN/CNEN-SP), São Paulo, São Paulo, Brazil
| | - Daniel Fábio Kawano
- Faculdade de Ciências Farmacêuticas, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Andreia Machado Leopoldino
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Ivone Carvalho
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Balakishan G, Kumaraswamy G, Narayanarao V, Shankaraiah P. Lewis acid / Base-free Strategy for the Synthesis of 2-Arylthio and Selenyl Benzothiazole / Thiazole and Imidazole. HETEROCYCL COMMUN 2021. [DOI: 10.1515/hc-2020-0119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Abstract
A Cu(II)-catalyzed Csp2-Se and Csp2-Sulfur bond formation was achieved with moderate to good yields without the aid of Lewis acid and base. The reaction is compatible with a wide range of heterocycles such as benzothiazole, thiazole, and imidazole. Also, this typical protocol is found to be active in thio-selenation via S-H activation. Additionally, we proposed a plausible mechanistic pathway involving Cu(III) putative intermediate.
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Affiliation(s)
- Guniganti Balakishan
- Organic Synthesis &Process Chemistry Division, CSIR – Indian Institute of Chemical Technology , Hyderabad – , India
| | - Gullapalli Kumaraswamy
- Organic Synthesis &Process Chemistry Division, CSIR – Indian Institute of Chemical Technology , Hyderabad – , India ; Academy of Scientific and Innovative Research (AcSIR) , 2 Rafi Marg , New Delhi – , India
| | - Vykunthapu Narayanarao
- Organic Synthesis &Process Chemistry Division, CSIR – Indian Institute of Chemical Technology , Hyderabad – , India
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13
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Wang J, Li JH, Guo Y, Dong H, Liu Q, Yu XQ. TEMPO-Mediated C-H Amination of Benzoxazoles with N-Heterocycles. J Org Chem 2020; 85:12797-12803. [PMID: 32878444 DOI: 10.1021/acs.joc.0c01921] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The direct amination of benzoxazoles at C2 using N-heterocycles as nitrogen sources has been developed for the first time. Several kinds of inexpensive oxidants and also electricity were effective for this transformation in the presence of 2,2,6,6-tetramethylpiperidine-N-oxyl. This metal-free and operationally simple reaction can afford a variety of important C,N'-linked bis-heteocycles in moderate to good yields under very mild reaction conditions. The in situ generated oxoammonium salt was proved to be important for this transformation.
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Affiliation(s)
- Jian Wang
- Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu 610052, China
| | - Jiang-Hua Li
- Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu 610052, China
| | - Yidong Guo
- Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu 610052, China
| | - Hongbo Dong
- Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu 610052, China
| | - Qiang Liu
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, China
| | - Xiao-Qi Yu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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14
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Baranovsky IV, Konstantinova LS, Tolmachev MA, Popov VV, A. Lyssenko K, Rakitin OA. Synthesis of 2-((2-(Benzo[d]oxazol-2-yl)-2 H-imidazol-4-yl)amino)-phenols from 2-((5 H-1,2,3-Dithiazol-5-ylidene)amino)phenols through Unprecedented Formation of Imidazole Ring from Two Methanimino Groups. Molecules 2020; 25:molecules25173768. [PMID: 32824981 PMCID: PMC7504547 DOI: 10.3390/molecules25173768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/14/2020] [Accepted: 08/18/2020] [Indexed: 11/23/2022] Open
Abstract
A new synthetic pathway to four substituted imidazoles from readily available 2-((4-aryl(thienyl)-5H-1,2,3-dithiazol-5-ylidene)amino)phenols has been developed. Benzo[d]oxazol-2-yl(aryl(thienyl))methanimines were proved as key intermediates in their synthesis. The formation of an imidazole ring from two methanimine derivatives likely includes the opening of one benzoxazole ring followed by ring closure by intermolecular nucleophilic attack of the N-methanimine atom to a carbon atom of another methanimine.
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Affiliation(s)
- Ilia V. Baranovsky
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (I.V.B.); (L.S.K.); (M.A.T.)
| | - Lidia S. Konstantinova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (I.V.B.); (L.S.K.); (M.A.T.)
- Nanotechnology Education and Research Center, South Ural State University, 454080 Chelyabinsk, Russia;
| | - Mikhail A. Tolmachev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (I.V.B.); (L.S.K.); (M.A.T.)
| | - Vadim V. Popov
- Nanotechnology Education and Research Center, South Ural State University, 454080 Chelyabinsk, Russia;
| | - Konstantin A. Lyssenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskiye Gory, 1, 119991 Moscow, Russia;
- G. V. Plekhanov Russian University of Economics, 36 Stremyanny Per., 117997 Moscow, Russia
| | - Oleg A. Rakitin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (I.V.B.); (L.S.K.); (M.A.T.)
- Nanotechnology Education and Research Center, South Ural State University, 454080 Chelyabinsk, Russia;
- Correspondence: ; Tel.: +7-499-135-5327
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15
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Zhou Y, Liu W, Liu Y, Guan J, Yan J, Yuan JJ, Tao DJ, Song Z. Oxidative NHC catalysis for base-free synthesis of benzoxazinones and benzoazoles by thermal activated NHCs precursor ionic liquid catalyst using air as oxidant. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111013] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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16
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Kumar M, Sharma R, Raziullah, Khan AA, Ahmad A, Dutta HS, Koley D. Cu(II)-Catalyzed Ortho C(sp 2)-H Diarylamination of Arylamines To Synthesize Triarylamines. Org Lett 2020; 22:2152-2156. [PMID: 32129076 DOI: 10.1021/acs.orglett.0c00196] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A copper-catalyzed, directed ortho C-H diarylamination of indoles, indolines, anilines, and N-aryl-7-azaindoles has been established. Only copper salt as the catalyst and oxygen as the terminal oxidant are used to synthesize triarylamines using various diarylamines including carbazole and phenothiazine. Mechanistic interrogation reveals that copper plays a dual role.
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Affiliation(s)
- Mohit Kumar
- Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Rishabh Sharma
- National Institute of Pharmaceutical Education and Research, Chunilal Bhawan, 168, Manicktala Road, Kolkata, 700054, India
| | - Raziullah
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Afsar Ali Khan
- Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Ashfaq Ahmad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | | | - Dipankar Koley
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
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17
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1,2,3-Triazole tethered 2-mercaptobenzimidazole derivatives: design, synthesis and molecular assessment toward C6 glioma cell line. Future Med Chem 2020; 12:689-708. [PMID: 32193951 DOI: 10.4155/fmc-2019-0227] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Aim: Glioblastoma multiforme (GBM) is an aggressive cancer with very limited clinical therapies. Herein, we have designed novel mercaptobenzimidazole derivatives (1-7) as multitarget antineoplastic drugs and assessed their antiproliferative profiles on an experimental model for GBM, the C6 glioma line. Results: The target compounds were synthesized in few steps with reasonable yields (33-90%). Compounds 1 (∼18 μM) and 4 (∼20 μM) showed dose-dependent antiproliferative effects on C6 glioma and significantly increased early apoptosis, but only 4 disrupted the cell cycle progression and did not induce autophagy. Docking simulations suggested these compounds as dual kinase and colchicine binding site inhibitors. Conclusion: In spite of the limited selective toxicity, 4 hold the potential to be further optimized for the treatment of GBM.
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18
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Henrion M, Smolders S, De Vos DE. Cu II/H-USY as a regenerable bifunctional catalyst for the additive-free C–H amination of azoles. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02153a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The use of the bifunctional CuII/H-USY catalyst for the direct amination of azoles under air and without additives has been disclosed.
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Affiliation(s)
- Mickaël Henrion
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS)
- KU Leuven
- 3001 Leuven
- Belgium
| | - Simon Smolders
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS)
- KU Leuven
- 3001 Leuven
- Belgium
| | - Dirk E. De Vos
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS)
- KU Leuven
- 3001 Leuven
- Belgium
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19
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Zhao H, Li X, Guan R, Jiang H, Zhang M. Synthesis of Diverse Functionalized Quinoxalines by Oxidative Tandem Dual C-H Amination of Tetrahydroquinoxalines with Amines. Chemistry 2019; 25:15858-15862. [PMID: 31560402 DOI: 10.1002/chem.201903696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/26/2019] [Indexed: 11/08/2022]
Abstract
The tandem dual C-H amination of tetrahydroquinoxalines with free amines under aerobic copper catalysis conditions has been demonstrated. The synthetic protocol proceeds with good substrate and functional group compatibility, mild reaction conditions, short reaction time, the use of the naturally abundant [Cu]/O2 catalyst system, excellent chemoselectivity and synthetic efficiency, and with no need for the pre-installation of specific aminating agents, which offers a practical platform for the rapid and diverse synthesis of diaminoquinoxalines. Moreover, this work has shown the potential of single-electron-oxidation-induced C-H functionalization of N-heterocycles, and its application in the development of optoelectronic materials.
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Affiliation(s)
- He Zhao
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P.R. China
| | - Xiu Li
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P.R. China
| | - Rongqing Guan
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P.R. China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P.R. China
| | - Min Zhang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P.R. China
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20
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Liang T, Zhao H, Gong L, Jiang H, Zhang M. Synthesis of Multisubstituted Benzimidazolones via Copper-Catalyzed Oxidative Tandem C-H Aminations and Alkyl Deconstructive Carbofunctionalization. iScience 2019; 15:127-135. [PMID: 31048147 PMCID: PMC6496510 DOI: 10.1016/j.isci.2019.04.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 03/27/2019] [Accepted: 04/15/2019] [Indexed: 01/25/2023] Open
Abstract
Benzimidazolone constitutes the core structure of numerous pharmaceuticals, agrochemicals, inhibitors, pigments, herbicides, and fine chemicals. Amination of hydrocarbons is an attractive tool for the creation of nitrogen-containing products. However, the multiple steps, harsh conditions, and low atom efficiencies often present in these reactions remain challenging. We present a multicomponent synthesis of functional benzimidazolones from arylamines, dialkylamines, and alcohols, acting via the sequence of copper-catalyzed oxidative tandem C-H aminations and alkyl deconstructive carbofunctionalization. The catalytic transformation forms multiple bonds in one single operation, uses readily available feedstocks and a naturally abundant Cu/O2 catalyst system, has broad substrate scope, avoids pre-installation of aminating agents and directing groups, and provides high chemo- and regioselectivity, resulting in direct functionalization of inert C-H and C-C bonds via single-electron oxidation-induced activation mode. This platform can be expected to provide structurally diverse products with interesting biological, chemical, and physical properties.
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Affiliation(s)
- Taoyuan Liang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - He Zhao
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Lingzhen Gong
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Min Zhang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China.
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21
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Dörr M, Lips S, Martínez‐Huitle CA, Schollmeyer D, Franke R, Waldvogel SR. Synthesis of Highly Functionalized
N
,
N
‐Diarylamides by an Anodic C,
N
‐Coupling Reaction. Chemistry 2019; 25:7835-7838. [DOI: 10.1002/chem.201901442] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Maurice Dörr
- Institut für Organische ChemieJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Sebastian Lips
- Institut für Organische ChemieJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Carlos Alberto Martínez‐Huitle
- Institut für Organische ChemieJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
- Instituto de Química, Avenida Senador Salgado FilhoUniversidade Federal do Rio Grande do Norte 3000 Campus Universitario Lagoa Nova, Natal 5907800, RN Brazil
| | - Dieter Schollmeyer
- Institut für Organische ChemieJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Robert Franke
- Evonik Performance Materials GmbH Paul-Baumann-Straße 1 45772 Marl Germany
- Lehrstuhl für Theoretische ChemieRuhr-Universität Bochum 44780 Bochum Germany
| | - Siegfried R. Waldvogel
- Institut für Organische ChemieJohannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
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22
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Beejapur HA, Zhang Q, Hu K, Zhu L, Wang J, Ye Z. TEMPO in Chemical Transformations: From Homogeneous to Heterogeneous. ACS Catal 2019. [DOI: 10.1021/acscatal.8b05001] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hazi Ahmad Beejapur
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Qi Zhang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Kecheng Hu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Li Zhu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jianli Wang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zhibin Ye
- Department of Chemical and Materials Engineering, Concordia University, Montreal, Quebec H3G 1M8, Canada
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23
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Peterle MM, Scheide MR, Silva LT, Saba S, Rafique J, Braga AL. Copper‐Catalyzed Three‐Component Reaction of Oxadiazoles, Elemental Se/S and Aryl Iodides: Synthesis of Chalcogenyl (Se/S)‐Oxadiazoles. ChemistrySelect 2018. [DOI: 10.1002/slct.201801213] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Marcos M. Peterle
- LabselenDepartamento de QuímicaUniversidade Federal de Santa Catarina, Florianopolis 88040-900 SC-Brazil
| | - Marcos R. Scheide
- LabselenDepartamento de QuímicaUniversidade Federal de Santa Catarina, Florianopolis 88040-900 SC-Brazil
| | - Lais T. Silva
- LabselenDepartamento de QuímicaUniversidade Federal de Santa Catarina, Florianopolis 88040-900 SC-Brazil
| | - Sumbal Saba
- LabselenDepartamento de QuímicaUniversidade Federal de Santa Catarina, Florianopolis 88040-900 SC-Brazil
| | - Jamal Rafique
- LabselenDepartamento de QuímicaUniversidade Federal de Santa Catarina, Florianopolis 88040-900 SC-Brazil
- Instituto de QuímicaUniversidade Federal do Mato Grosso do Sul, Campo Grande 79074-460 MS-Brazil
| | - Antonio L. Braga
- LabselenDepartamento de QuímicaUniversidade Federal de Santa Catarina, Florianopolis 88040-900 SC-Brazil
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24
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Qiu Y, Struwe J, Meyer TH, Oliveira JCA, Ackermann L. Catalyst- and Reagent-Free Electrochemical Azole C-H Amination. Chemistry 2018; 24:12784-12789. [PMID: 29901828 DOI: 10.1002/chem.201802832] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Indexed: 01/09/2023]
Abstract
Catalyst- and chemical oxidant-free electrochemical azole C-H aminations were accomplished via cross-dehydrogenative C-H/N-H functionalization. The catalyst-free electrochemical C-H amination proved feasible on azoles with high levels of efficacy and selectivity, avoiding the use of stoichiometric oxidants under ambient conditions. Likewise, the C(sp3 )-H nitrogenation proved viable under otherwise identical conditions. The dehydrogenative C-H amination featured ample scope, including cyclic and acyclic aliphatic amines as well as anilines, and employed sustainable electricity as the sole oxidant.
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Affiliation(s)
- Youai Qiu
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Julia Struwe
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Tjark H Meyer
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - João C A Oliveira
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
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25
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Pan WJ, Wang ZX. Palladium-Catalyzed C−H Benzylation of (Benzo)oxazoles with Benzylic Quaternary Ammonium Triflates. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800264] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wen-Jing Pan
- CAS Key Laboratory of Soft Matter Chemistry, and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Zhong-Xia Wang
- CAS Key Laboratory of Soft Matter Chemistry, and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
- Collaborative Innovation Center of Chemical Science, and Engineering (Tianjin); Tianjin 300072 P.R. China
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26
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Heurich T, Qu ZW, Kunzmann R, Schnakenburg G, Engeser M, Nožinović S, Streubel R. Styrene Polymerization under Ambient Conditions by using a Transient 1,3,2-Diazaphospholane-2-oxyl Complex. Chemistry 2018; 24:6473-6478. [PMID: 29470864 DOI: 10.1002/chem.201800413] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Indexed: 12/12/2022]
Abstract
A combined theoretical and experimental study on the formation and reactivity of a P-OTEMP (P-bound TEMPO (TEMPO=2,2,6,6-tetramethyl-piperidin-1-oxyl)) substituted 1,3,2-diazaphospholane W(CO)5 complex is presented, including DFT-based mechanistic details. The complex possesses a thermally labile O-N bond that cleaves homolytically yielding the transient 1,3,2-diazaphospholane-2-oxyl complex [(CO)5 W(R2 PO. )], which acts as a radical initiator for styrene polymerization under ambient conditions.
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Affiliation(s)
- Tobias Heurich
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstraße 4, 53115, Bonn, Germany
| | - Robert Kunzmann
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Marianne Engeser
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Senada Nožinović
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Rainer Streubel
- Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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27
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Liang T, Tan Z, Zhao H, Chen X, Jiang H, Zhang M. Aerobic Copper-Catalyzed Synthesis of Benzimidazoles from Diaryl- and Alkylamines via Tandem Triple C–H Aminations. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00082] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Taoyuan Liang
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Zhenda Tan
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - He Zhao
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Xiuwen Chen
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Min Zhang
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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28
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Dutta PK, Sen S, Saha D, Dhar B. Solid Supported Nano Structured Cu-Catalyst for Solvent/Ligand Free C2Amination of Azoles. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701669] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Pratip Kumar Dutta
- Department of Chemistry; School of Natural Sciences; Shiv Nadar University; Chithera 201314 Dadri, Gautam Buddha Nagar Uttar Pradesh India
| | - Subhabrata Sen
- Department of Chemistry; School of Natural Sciences; Shiv Nadar University; Chithera 201314 Dadri, Gautam Buddha Nagar Uttar Pradesh India
| | - Debasree Saha
- Department of Chemistry; School of Natural Sciences; Shiv Nadar University; Chithera 201314 Dadri, Gautam Buddha Nagar Uttar Pradesh India
- Department of Chemistry; Raidighi College; South 24 743383 Parganas West Bengal India
| | - Basabbijayi Dhar
- Department of Chemistry; School of Natural Sciences; Shiv Nadar University; Chithera 201314 Dadri, Gautam Buddha Nagar Uttar Pradesh India
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29
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Yadav VK, Srivastava VP, Yadav LDS. Iodide catalyzed synthesis of 2-aminobenzoxazoles via oxidative cyclodesulfurization of phenolic thioureas with hydrogen peroxide. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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30
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Biswas S, Kubota K, Orlandi M, Turberg M, Miles DH, Sigman MS, Toste FD. Enantioselective Synthesis of N
,S
-Acetals by an Oxidative Pummerer-Type Transformation using Phase-Transfer Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201711277] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Souvagya Biswas
- Department of Chemistry; University of California; Berkeley CA 94720 USA
| | - Koji Kubota
- Department of Chemistry; University of California; Berkeley CA 94720 USA
| | - Manuel Orlandi
- Department of Chemistry; University of Utah; Salt Lake City UT 84112 USA
| | - Mathias Turberg
- Department of Chemistry; University of California; Berkeley CA 94720 USA
| | - Dillon H. Miles
- Department of Chemistry; University of California; Berkeley CA 94720 USA
| | - Matthew S. Sigman
- Department of Chemistry; University of Utah; Salt Lake City UT 84112 USA
| | - F. Dean Toste
- Department of Chemistry; University of California; Berkeley CA 94720 USA
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31
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Biswas S, Kubota K, Orlandi M, Turberg M, Miles DH, Sigman MS, Toste FD. Enantioselective Synthesis of N,S-Acetals by an Oxidative Pummerer-Type Transformation using Phase-Transfer Catalysis. Angew Chem Int Ed Engl 2017; 57:589-593. [PMID: 29171138 DOI: 10.1002/anie.201711277] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Indexed: 11/12/2022]
Abstract
Reported is the first enantioselective oxidative Pummerer-type transformation using phase-transfer catalysis to deliver enantioenriched sulfur-bearing heterocycles. This reaction includes the direct oxidation of sulfides to a thionium intermediate, followed by an asymmetric intramolecular nucleophilic addition to form chiral cyclic N,S-acetals with moderate to high enantioselectivites. Deuterium-labelling experiments were performed to identify the stereodiscrimination step of this process. Further analysis of the reaction transition states, by means of multidimensional correlations and DFT calculations, highlight the existence of a set of weak noncovalent interactions between the catalyst and substrate that govern the enantioselectivity of the reaction.
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Affiliation(s)
- Souvagya Biswas
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Koji Kubota
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Manuel Orlandi
- Department of Chemistry, University of Utah, Salt Lake City, UT, 84112, USA
| | - Mathias Turberg
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Dillon H Miles
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, Salt Lake City, UT, 84112, USA
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
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32
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Brahmayya M, Dai SA, Suen SY. Sulfonated reduced graphene oxide catalyzed cyclization of hydrazides and carbon dioxide to 1,3,4-oxadiazoles under sonication. Sci Rep 2017; 7:4675. [PMID: 28680037 PMCID: PMC5498654 DOI: 10.1038/s41598-017-04143-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 05/09/2017] [Indexed: 11/09/2022] Open
Abstract
Acid catalysts facilitate many chemical reactions. Sulfonated reduced grapheneoxide (rGOPhSO3H) has shown to be an encouraging solid acid catalyst because of its efficiency, cost-effectiveness and safety of use. In this study, we prepared the rGOPhSO3H nano acid catalyst, with the introduction of aromatic sulfonic acid radicals onto GO by fractional removal of oxygenated functions. It was thoroughly characterized by FT-IR, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, energy dispersive spectroscopy (EDS) and solid state 13C MAS NMR (SSNMR). Here we report the conversion of CO2 (1.0 atm pressure, at = 50 °C, the source of C1 carbon feed stock) with hydrazides and a catalytic amount rGOPhSO3H, which through a cyclization reaction results in a new strategy for the synthesis of 5-substituted-3H-[1,3,4]-oxadiazol-2-ones (SOxdOs) under ultrasonic irradiation. Hence this concept of cyclization opens up for new insights
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Affiliation(s)
- Manuri Brahmayya
- Department of Chemical Engineering, National Chung Hsing University, 250 KuoKuang Raod, Taichung, Taiwan, R.O.C
| | - Shenghong A Dai
- Department of Chemical Engineering, National Chung Hsing University, 250 KuoKuang Raod, Taichung, Taiwan, R.O.C
| | - Shing-Yi Suen
- Department of Chemical Engineering, National Chung Hsing University, 250 KuoKuang Raod, Taichung, Taiwan, R.O.C..
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33
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Zhou Y, Liu Z, Yuan T, Huang J, Liu C. The Synthesis of 2-Aminobenzoxazoles Using Reusable Ionic Liquid as a Green Catalyst under Mild Conditions. MOLECULES (BASEL, SWITZERLAND) 2017; 22:molecules22040576. [PMID: 28368328 PMCID: PMC6154564 DOI: 10.3390/molecules22040576] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 03/27/2017] [Accepted: 03/28/2017] [Indexed: 11/23/2022]
Abstract
A facile, green, and efficient method for the direct oxidative amination of benzoxazoles using heterocyclic ionic liquid as catalyst has been developed. The reaction proceeded smoothly at room temperature and gave the desirable 2-aminobenzoxazoles with good to excellent yields (up to 97%). The catalyst 1-butylpyridinium iodide can be easily recycled and reused with similar efficacies for at least four cycles.
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Affiliation(s)
- Ya Zhou
- School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China.
| | - Zhiqing Liu
- School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China.
| | - Tingting Yuan
- School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China.
| | - Jianbin Huang
- School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China.
| | - Chenjiang Liu
- School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China.
- Physics and Chemistry Detecting Center, Xinjiang University, Urumqi 830046, China.
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34
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Reddy SS, Reddy BN, Reddy PVG, Reddy GV, Sarma LS. Mild and Efficient Synthesis of 5-(2,2-difluoro-1-phenyl cyclopropyl)- N-substituted-1,3,4-oxadiazol-2-amines viaGraphene Oxide as Catalyst under Ultrasonic Irradiation Conditions. ChemistrySelect 2017. [DOI: 10.1002/slct.201601413] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Bijivemula N. Reddy
- Department of Chemistry; Vellore Institute of Technology; Vellore Tamil Nadu India
| | | | - Gajulapalli Vishwakshan Reddy
- Nanoelectrochemistry Research Laboratory; Department of Chemistry; Yogi Vemana University; Kadapa- 516003, Andhra Pradesh India
| | - Loka Subramanyam Sarma
- Nanoelectrochemistry Research Laboratory; Department of Chemistry; Yogi Vemana University; Kadapa- 516003, Andhra Pradesh India
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35
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Wallace DJ, Mangion I, Coleman P. Discovery and Chemical Development of Suvorexant - A Dual Orexin Antagonist for Sleep Disorder. ACTA ACUST UNITED AC 2016. [DOI: 10.1021/bk-2016-1239.ch001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Affiliation(s)
- Debra J. Wallace
- Department of Process Chemistry, Merck and Co, Rahway, New Jersey, 07065, United States
- Department of Medicinal Chemistry, Merck and Co, Westpoint, Pennsylvania, 19486, United States
| | - Ian Mangion
- Department of Process Chemistry, Merck and Co, Rahway, New Jersey, 07065, United States
- Department of Medicinal Chemistry, Merck and Co, Westpoint, Pennsylvania, 19486, United States
| | - Paul Coleman
- Department of Process Chemistry, Merck and Co, Rahway, New Jersey, 07065, United States
- Department of Medicinal Chemistry, Merck and Co, Westpoint, Pennsylvania, 19486, United States
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36
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Lester RP, Bham T, Bousfield TW, Lewis W, Camp JE. Exploring the Reactivity of 2-Trichloromethylbenzoxazoles for Access to Substituted Benzoxazoles. J Org Chem 2016; 81:12472-12477. [DOI: 10.1021/acs.joc.6b02315] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Roy P. Lester
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Travis Bham
- Department
of Chemical Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, United Kingdom
| | - Thomas W. Bousfield
- Department
of Chemical Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, United Kingdom
| | - William Lewis
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Jason E. Camp
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
- Department
of Chemical Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, United Kingdom
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37
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Gini A, Bamberger J, Luis-Barrera J, Zurro M, Mas-Ballesté R, Alemán J, Mancheño OG. Synthesis of 3-Benzazepines by Metal-Free Oxidative C-H Bond Functionalization-Ring Expansion Tandem Reaction. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600985] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Andrea Gini
- Institute for Organic Chemistry; University of Regensburg; 93053 Regensburg Germany
- Straubing Center of Science for Renewable Resources; 94315 Straubing Germany
| | - Julia Bamberger
- Institute for Organic Chemistry; University of Regensburg; 93053 Regensburg Germany
- Straubing Center of Science for Renewable Resources; 94315 Straubing Germany
| | - Javier Luis-Barrera
- Organic Chemistry Department; Universidad Autónoma de Madrid (U.A.M.); 28049 Madrid Spain
| | - Mercedes Zurro
- Institute for Organic Chemistry; University of Regensburg; 93053 Regensburg Germany
| | - Rubén Mas-Ballesté
- Inorganic Chemistry Department; Universidad Autónoma de Madrid (U.A.M.); 28049 Madrid Spain
| | - José Alemán
- Organic Chemistry Department; Universidad Autónoma de Madrid (U.A.M.); 28049 Madrid Spain
| | - Olga García Mancheño
- Institute for Organic Chemistry; University of Regensburg; 93053 Regensburg Germany
- Straubing Center of Science for Renewable Resources; 94315 Straubing Germany
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38
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Li Y, Wang M, Fan W, Qian F, Li G, Lu H. Cobalt-Catalyzed Cross-Dehydrogenative Coupling Reactions of (Benz)oxazoles with Ethers. J Org Chem 2016; 81:11743-11750. [DOI: 10.1021/acs.joc.6b02211] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yanrong Li
- Institute
of Chemistry and BioMedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | - Mengshi Wang
- Institute
of Chemistry and BioMedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | - Wei Fan
- Institute
of Chemistry and BioMedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | - Fen Qian
- Institute
of Chemistry and BioMedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
| | - Guigen Li
- Institute
of Chemistry and BioMedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Hongjian Lu
- Institute
of Chemistry and BioMedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing 210093, China
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39
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Xie W, Yoon JH, Chang S. (NHC)Cu-Catalyzed Mild C–H Amidation of (Hetero)arenes with Deprotectable Carbamates: Scope and Mechanistic Studies. J Am Chem Soc 2016; 138:12605-14. [DOI: 10.1021/jacs.6b07486] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Weilong Xie
- Center
for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, South Korea
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, South Korea
| | - Jung Hee Yoon
- Center
for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, South Korea
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, South Korea
| | - Sukbok Chang
- Center
for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 305-701, South Korea
- Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 305-701, South Korea
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40
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Liu W, Sun Y, Zhao H, Li B, Chen S. Ytterbium(III) Trifluoromethanesulfonate Catalyzed Ring-Opening C(sp3
)−N Bond Formation of Benzoxazoles with Propargylic Alcohols. ChemCatChem 2016. [DOI: 10.1002/cctc.201600606] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wenfei Liu
- Inner Mongolia Key Laboratory of Fine Organic Synthesis; Department of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot 010021 P. R. China
| | - Yongqing Sun
- Inner Mongolia Key Laboratory of Fine Organic Synthesis; Department of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot 010021 P. R. China
| | - Haiying Zhao
- Inner Mongolia Key Laboratory of Fine Organic Synthesis; Department of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot 010021 P. R. China
| | - Baoguo Li
- Inner Mongolia Key Laboratory of Fine Organic Synthesis; Department of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot 010021 P. R. China
| | - Shufeng Chen
- Inner Mongolia Key Laboratory of Fine Organic Synthesis; Department of Chemistry and Chemical Engineering; Inner Mongolia University; Hohhot 010021 P. R. China
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41
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Wang J, Yang S. A silver triflate-catalyzed cascade of in situ-oxidation and allylation of arylbenzylamines. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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42
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A Metal-Free Oxidative Cross-Dehydrogenative Coupling ofN-Aryl Tetrahydroisoquinolines and 2-Methylazaarenes Using a Recyclable Oxoammonium Salt as Oxidant in Aqueous Media. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600423] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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43
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Stockerl S, Mancheño OG. Non-covalent organocatalysis in asymmetric oxidative C(sp3)–H bond functionalization – broadening C–H bond coupling reactions. Org Chem Front 2016. [DOI: 10.1039/c5qo00347d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this highlight, the design of cooperative non-covalent organocatalysis for the development of novel asymmetric oxidative C–H bond functionalization reactions is presented.
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Affiliation(s)
- Sebastian Stockerl
- Institute for Organic Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
| | - Olga García Mancheño
- Institute for Organic Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
- Straubing Center of Science for Renewable Resources
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44
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Visible-light-promoted cyclodesulfurization of phenolic thioureas: an organophotoredox catalytic approach to 2-aminobenzoxazoles. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.11.089] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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45
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Jiao J, Murakami K, Itami K. Catalytic Methods for Aromatic C–H Amination: An Ideal Strategy for Nitrogen-Based Functional Molecules. ACS Catal 2015. [DOI: 10.1021/acscatal.5b02417] [Citation(s) in RCA: 406] [Impact Index Per Article: 45.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jiao Jiao
- Institute
of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of
Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Kei Murakami
- Institute
of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of
Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Kenichiro Itami
- Institute
of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of
Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- JST,
ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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46
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Yang K, Chen X, Wang Y, Li W, Kadi AA, Fun HK, Sun H, Zhang Y, Li G, Lu H. Cobalt-Catalyzed Decarboxylative 2-Benzoylation of Oxazoles and Thiazoles with α-Oxocarboxylic Acids. J Org Chem 2015; 80:11065-72. [DOI: 10.1021/acs.joc.5b01450] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ke Yang
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Xinyong Chen
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Yuqi Wang
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Wanqing Li
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Adnan A. Kadi
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hoong-Kun Fun
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hao Sun
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Yan Zhang
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Guigen Li
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Hongjian Lu
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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47
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Niu P, Kang J, Tian X, Song L, Liu H, Wu J, Yu W, Chang J. Synthesis of 2-amino-1,3,4-oxadiazoles and 2-amino-1,3,4-thiadiazoles via sequential condensation and I2-mediated oxidative C–O/C–S bond formation. J Org Chem 2015; 80:1018-24. [PMID: 25506709 DOI: 10.1021/jo502518c] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
2-Amino-substituted 1,3,4-oxadiazoles and 1,3,4-thiadiazoles were synthesized via condensation of semicarbazide/thiosemicarbazide and the corresponding aldehydes followed by I2-mediated oxidative C–O/C–S bond formation. This transition-metal-free sequential synthesis process is compatible with aromatic, aliphatic, and cinnamic aldehydes, providing facile access to a variety of diazole derivatives bearing a 2-amino substituent in an efficient and scalable fashion.
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48
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Hamlin TA, Kelly CB, Ovian JM, Wiles RJ, Tilley LJ, Leadbeater NE. Toward a Unified Mechanism for Oxoammonium Salt-Mediated Oxidation Reactions: A Theoretical and Experimental Study Using a Hydride Transfer Model. J Org Chem 2015; 80:8150-67. [DOI: 10.1021/acs.joc.5b01240] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Trevor A. Hamlin
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Christopher B. Kelly
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - John M. Ovian
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Rebecca J. Wiles
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Leon J. Tilley
- Department
of Chemistry, Stonehill College, 320 Washington Street, Easton, Massachusetts 02357, United States
| | - Nicholas E. Leadbeater
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
- Department of Community Medicine & Health Care, University of Connecticut Health Center, The Exchange, 263 Farmington Avenue, Farmington, Connecticut 06030, United States
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49
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Zhao X, Ding F, Li J, Lu K, Lu X, Wang B, Yu P. Direct C–H iodination of 1,3-azoles catalysed by CuBr 2. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Yadav AK, Yadav LDS. Direct construction of 2-alkylbenzo-1,3-azoles via C–H activation of alkanes for C–C and C–X (X = O, S) bond formation. Org Biomol Chem 2015; 13:2606-11. [DOI: 10.1039/c4ob02488e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Alkylated benzo(oxa)thiazoles were prepared directly from simple alkanes and aryl isocyanates/isothiocyanates in a one-pot procedure.
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Affiliation(s)
- Arvind K. Yadav
- Green Synthesis Lab
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Lal Dhar S. Yadav
- Green Synthesis Lab
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
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