1
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Yadav J, Chaudhary R. Experimental and theoretical studies on prototropic tautomerism of 1-tetralone-2-carbothioamides and synthesis of regioselectively designed fused 2H-indazole derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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2
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Wolf WJ, Li J, Jones SC, Stoltz BM, Grubbs RH. An Efficient Synthesis of Geminal-Dialkyl Dienes for Olefin Metathesis Polymerization. Macromolecules 2020; 53:7803-7809. [PMID: 34305177 PMCID: PMC8297823 DOI: 10.1021/acs.macromol.0c01606] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A robust synthesis of gem-dialkyl acyclic diene monomers has been developed. This route is scalable, flexible, and biorenewable, allowing for the production of a wide range of diene monomers of different lengths and different gem-dialkyl substitution starting from unsaturated esters derived from seed oils. The metathesis polymerization of these monomers and the hydrogenation of the resulting polyolefins leads to telechelic gem-dialkyl polyethylenes, which can be used as elastomers in the synthesis of polyurethanes and other block polymers.
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Affiliation(s)
- William J. Wolf
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Jiaming Li
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Simon C. Jones
- Electrochemical Technologies Group, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, United States
| | - Brian M. Stoltz
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 101-20, Pasadena, California 91125, United States
| | - Robert H. Grubbs
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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3
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Zhao YQ, Tian JJ, Ai CR, Wang XC. Diiodomethane-Mediated Generation of N-Aryliminium Ions and Subsequent [4 + 2] Cycloadditions with Olefins. J Org Chem 2020; 85:2456-2465. [PMID: 31916760 DOI: 10.1021/acs.joc.9b03148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report a method for in situ generation of N-aryliminium ions via reactions of N,N-dimethylanilines with diiodomethane. We used the method to prepare tetrahydroquinolines via one-pot three-component reactions between N,N-dimethylanilines, diiodomethane, and olefins. This transformation involves initial reaction of the aniline with diiodomethane to form an iodomethylammonium salt, which undergoes fragmentation accompanied by elimination of methyl iodide to give an N-aryliminium ion, which is trapped by the olefin via [4 + 2] cycloaddition to give the final product. This method for generating N-aryliminium ions requires neither a catalyst nor a strong oxidant, suggesting that it can be expected to find broad utility, especially for substrates that are sensitive to Lewis acids, transition metals, or strong oxidants.
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Affiliation(s)
- Yu-Quan Zhao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Jun-Jie Tian
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Chong-Ren Ai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xiao-Chen Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
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4
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Highly Selective, Amine‐Derived Cannabinoid Receptor 2 Probes. Chemistry 2020; 26:1380-1387. [DOI: 10.1002/chem.201904584] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/19/2019] [Indexed: 11/07/2022]
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5
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Mahajani NS, Chisholm JD. Synthesis of 1,1'-Diarylethanes and Related Systems by Displacement of Trichloroacetimidates with Trimethylaluminum. J Org Chem 2018; 83:4131-4139. [PMID: 29478311 PMCID: PMC5889320 DOI: 10.1021/acs.joc.8b00027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Benzylic trichloroacetimidates are readily displaced by trimethylaluminum under Lewis acid promoted conditions to provide the corresponding methyl substitution product. This method is a convenient way to access 1,1'-diarylethanes and related systems, which play a significant role in medicinal chemistry, with a number of systems owing their biological activity to this functionality. Most benzylic substrates undergo ready displacement, with electron deficient systems being the exception. The use of an enantiopure imidate showed significant racemization, implicating the formation of a cationic intermediate.
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Affiliation(s)
- Nivedita S. Mahajani
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244
| | - John D. Chisholm
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244
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6
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Aurell MJ, González-Cardenete MA, Zaragozá RJ. A new mechanism for internal nucleophilic substitution reactions. Org Biomol Chem 2018; 16:1101-1112. [DOI: 10.1039/c7ob02994b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new mechanism, through two transition structures, is postulated for internal nucleophilic substitution reactions (SNi).
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Affiliation(s)
- María J. Aurell
- Departamento de Química Orgánica
- Universidad de Valencia
- 46100 Burjassot
- Spain
| | - Miguel A. González-Cardenete
- Instituto de Tecnología Química (UPV-CSIC)
- Universitat Politècnica de Valencia-Consejo Superior de Investigaciones Científicas
- 46022 Valencia
- Spain
| | - Ramón J. Zaragozá
- Departamento de Química Orgánica
- Universidad de Valencia
- 46100 Burjassot
- Spain
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7
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Ikemoto K, Kobayashi R, Sato S, Isobe H. Synthesis and Bowl‐in‐Bowl Assembly of a Geodesic Phenylene Bowl. Angew Chem Int Ed Engl 2017; 56:6511-6514. [DOI: 10.1002/anie.201702063] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Koki Ikemoto
- Department of Chemistry The University of Tokyo JST ERATO Isobe Degenerate π-Integration Project Hongo 7-3-1, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Kobayashi
- Advanced Institute for Materials Research Tohoku University Aoba-ku Sendai 980-8577 Japan
| | - Sota Sato
- Department of Chemistry The University of Tokyo JST ERATO Isobe Degenerate π-Integration Project Hongo 7-3-1, Bunkyo-ku Tokyo 113-0033 Japan
| | - Hiroyuki Isobe
- Department of Chemistry The University of Tokyo JST ERATO Isobe Degenerate π-Integration Project Hongo 7-3-1, Bunkyo-ku Tokyo 113-0033 Japan
- Advanced Institute for Materials Research Tohoku University Aoba-ku Sendai 980-8577 Japan
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8
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Ikemoto K, Kobayashi R, Sato S, Isobe H. Synthesis and Bowl‐in‐Bowl Assembly of a Geodesic Phenylene Bowl. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702063] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Koki Ikemoto
- Department of Chemistry The University of Tokyo JST ERATO Isobe Degenerate π-Integration Project Hongo 7-3-1, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Kobayashi
- Advanced Institute for Materials Research Tohoku University Aoba-ku Sendai 980-8577 Japan
| | - Sota Sato
- Department of Chemistry The University of Tokyo JST ERATO Isobe Degenerate π-Integration Project Hongo 7-3-1, Bunkyo-ku Tokyo 113-0033 Japan
| | - Hiroyuki Isobe
- Department of Chemistry The University of Tokyo JST ERATO Isobe Degenerate π-Integration Project Hongo 7-3-1, Bunkyo-ku Tokyo 113-0033 Japan
- Advanced Institute for Materials Research Tohoku University Aoba-ku Sendai 980-8577 Japan
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9
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Kashiwa M, Kuwata Y, Sonoda M, Tanimori S. Oxone-mediated facile access to substituted pyrazoles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10
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Affiliation(s)
- Björn Schmalzbauer
- Kekulé-Institut für
Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str.
1, 53121 Bonn, Germany
| | - Dirk Menche
- Kekulé-Institut für
Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str.
1, 53121 Bonn, Germany
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11
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Gaikwad DD, Chapolikar AD, Devkate CG, Warad KD, Tayade AP, Pawar RP, Domb AJ. Synthesis of indazole motifs and their medicinal importance: an overview. Eur J Med Chem 2014; 90:707-31. [PMID: 25506810 DOI: 10.1016/j.ejmech.2014.11.029] [Citation(s) in RCA: 214] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 11/03/2014] [Accepted: 11/15/2014] [Indexed: 01/16/2023]
Abstract
Indazoles is an important class of heterocyclic compounds having a wide range of biological and pharmaceutical applications. There is enormous potential in the synthesis of novel heterocyclic systems to be used as building blocks for the next generation of pharmaceuticals as anti-bacterial, anti-depressant and anti-inflammatory. Fused aromatic 1H and 2H-indazoles are well recognized for anti-hypertensive and anti-cancer properties. The present review focuses on novel routes of their synthesis and various biological activities.
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Affiliation(s)
- Digambar D Gaikwad
- Dept. of Chemistry, Govt. College of Arts & Science, Aurangabad 431001, India.
| | | | | | - Khandu D Warad
- Dept. of Chemistry, Govt. College of Arts & Science, Aurangabad 431001, India
| | - Amit P Tayade
- Dept. of Chemistry, Govt. College of Arts & Science, Aurangabad 431001, India
| | | | - Abraham J Domb
- School of Pharmacy, Department of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
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12
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Molander GA, Cavalcanti LN, García-García C. Nickel-catalyzed borylation of halides and pseudohalides with tetrahydroxydiboron [B2(OH)4]. J Org Chem 2013; 78:6427-39. [PMID: 23777538 PMCID: PMC3740274 DOI: 10.1021/jo401104y] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Arylboronic acids are gaining increased importance as reagents and target structures in a variety of useful applications. Recently, the palladium-catalyzed synthesis of arylboronic acids employing the atom-economical tetrahydroxydiboron (BBA) reagent has been reported. The high cost associated with palladium, combined with several limitations of both palladium- and copper-catalyzed processes, prompted us to develop an alternative method. Thus, the nickel-catalyzed borylation of aryl and heteroaryl halides and pseudohalides using tetrahydroxydiboron (BBA) has been formulated. The reaction proved to be widely functional group tolerant and applicable to a number of heterocyclic systems. To the best of our knowledge, the examples presented here represent the only effective Ni-catalyzed Miyaura borylations conducted at room temperature.
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Affiliation(s)
- Gary A Molander
- Roy and Diana Vagelos Laboratories and Penn/Merck Laboratory for High Throughput Experimentation, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA.
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13
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Korbad BL, Lee SH. Simple and Efficient Procedure for Synthesis of N'-Arylamidines Using Trimethylaluminum. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.4.1266] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Hartsel JA, Wong DM, Mutunga JM, Ma M, Anderson TD, Wysinski A, Islam R, Wong EA, Paulson SL, Li J, Lam PCH, Totrov MM, Bloomquist JR, Carlier PR. Re-engineering aryl methylcarbamates to confer high selectivity for inhibition of Anopheles gambiae versus human acetylcholinesterase. Bioorg Med Chem Lett 2012; 22:4593-8. [PMID: 22738634 PMCID: PMC3389130 DOI: 10.1016/j.bmcl.2012.05.103] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Revised: 05/18/2012] [Accepted: 05/29/2012] [Indexed: 10/28/2022]
Abstract
To identify potential human-safe insecticides against the malaria mosquito we undertook an investigation of the structure-activity relationship of aryl methylcarbamates inhibitors of acetylcholinesterase (AChE). Compounds bearing a β-branched 2-alkoxy or 2-thioalkyl group were found to possess good selectivity for inhibition of Anopheles gambiae AChE over human AChE; up to 530-fold selectivity was achieved with carbamate 11d. A 3D QSAR model is presented that is reasonably consistent with log inhibition selectivity of 34 carbamates. Toxicity of these compounds to live Anopheles gambiae was demonstrated using both tarsal contact (filter paper) and topical application protocols.
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Affiliation(s)
- Joshua A Hartsel
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA
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15
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Mahoney SJ, Lou T, Bondarenko G, Fillion E. Carbon-Based Leaving Group in Substitution Reactions: Functionalization of sp3-Hybridized Quaternary and Tertiary Benzylic Carbon Centers. Org Lett 2012; 14:3474-7. [DOI: 10.1021/ol301442z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stuart J. Mahoney
- Department of Chemistry, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Tiantong Lou
- Department of Chemistry, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Ganna Bondarenko
- Department of Chemistry, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Eric Fillion
- Department of Chemistry, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
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