1
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Wu X, Sun Y, Zeng Y, Li X. Mechanistic Insights into Oxazolone Synthesis by Bimetallic Au-Pd-Catalyzed Catalysis and Catalyst Design: DFT Investigations. J Org Chem 2023. [PMID: 37449782 DOI: 10.1021/acs.joc.3c00751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Bimetallic synergistic catalysis is one of the most effective and powerful strategies for the synthesis of oxazolones, an important species in organic synthesis. In this work, the mechanism of AuCl(PMe3)/AgOTf-Pd(0) ([Au-Pd]) bimetallic catalyst-catalyzed oxazolone synthesis using N-alkynyl carbamates as precursors was studied in detail by DFT calculations and the catalytic performances of a series of bimetallic catalysts were evaluated. The results show that the reaction begins from the [Au]-catalyzed cycloisomerization of N-alkynyl carbamates. After the five-membered intermediate is formed, the [Pd(0)]-catalyzed cycle starts, which contains three steps: oxidation addition, transmetalation, and reductive elimination. The whole reaction belongs to a catalyzed catalysis, and the reductive elimination is the rate-determining step. In the transmetalation process, both the [Pd(0)] catalyst and the ionic bridge are necessary. For the [Au-Pd]-catalyzed process, it is Cl- as the bridge, not OTf-. The cheaper metal compound, AgCl(PMe3), can serve as the alternative of AuCl(PMe3) to co-catalyze with the [Pd(0)] catalyst for the title reaction.
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Affiliation(s)
- Xueju Wu
- College of Chemistry and Material Science, Hubei Key Laboratory of Inorganic and Nano-Materials, National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang 050024, P. R. China
| | - Yuanyuan Sun
- College of Chemistry and Material Science, Hubei Key Laboratory of Inorganic and Nano-Materials, National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang 050024, P. R. China
| | - Yanli Zeng
- College of Chemistry and Material Science, Hubei Key Laboratory of Inorganic and Nano-Materials, National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang 050024, P. R. China
| | - Xiaoyan Li
- College of Chemistry and Material Science, Hubei Key Laboratory of Inorganic and Nano-Materials, National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang 050024, P. R. China
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2
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Yescas-Galicia D, Restrepo-Osorio RA, García-González AN, Hernández-Benítez RI, Espinoza-Hicks JC, Escalante CH, Barrera E, Santoyo BM, Delgado F, Tamariz J. Divergent Pd-catalyzed Functionalization of 4-Oxazolin-2-ones and 4-Methylene-2-oxazolidinones and Synthesis of Heterocyclic-Fused Indoles. J Org Chem 2022; 87:13034-13052. [PMID: 36153994 DOI: 10.1021/acs.joc.2c01563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Palladium-catalyzed functionalization was presently performed on two building blocks: 4-oxazolin-2-ones and 4-methylene-2-oxazolidinones. Direct Heck arylation of 4-oxazolin-2-ones led to a series of 5-aryl-4-oxazolin-2-ones, including analogues with N-chiral auxiliary, in an almost quantitative yield. The Pd(II)-catalyzed homocoupling reaction of 4-oxazolin-2-ones provided novel heterocyclic across-ring dienes. Meanwhile, the intramolecular cross-coupling of N-aryl-4-methylene-2-oxazolidinones furnished a series of oxazolo[3,4-a]indol-3-ones. Further functionalization of 4-methylene-2-oxazolidinones afforded substituted indoles and heterocyclic-fused indoles with aryl, bromo, carbinol, formyl, and vinyl groups. A computational study was carried out to account for the behavior of the formylated derivatives. The currently developed methodology was applied to a new formal total synthesis of ellipticine.
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Affiliation(s)
- Daniel Yescas-Galicia
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Rodrigo A Restrepo-Osorio
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Ailyn N García-González
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Roberto I Hernández-Benítez
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - José C Espinoza-Hicks
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario S/N, 31000 Chihuahua, Chih., Mexico
| | - Carlos H Escalante
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Edson Barrera
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Blanca M Santoyo
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Francisco Delgado
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
| | - Joaquín Tamariz
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala S/N, 11340 Mexico City, Mexico
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3
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Wang Z, Chen X, Hu Y, Li H, Yang YF, Liu Y, Jin H, Zhou B. Deconstructive isomerization of azetidinols via C-C bond cleavage enabled by N-heterocyclic carbene (NHC) catalysis. Chem Commun (Camb) 2022; 58:9294-9297. [PMID: 35904428 DOI: 10.1039/d2cc03104c] [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
Herein, we describe an N-heterocyclic carbene (NHC)-catalyzed deconstructive isomerization of azetidinols via an inert C-C bond cleavage. It provides a direct and supplementary pathway to access α-amino ketone and oxazol-2-one derivatives in moderate to good yields. DFT calculation supports the proposed mechanism in which NHC undergoes a concerted proton transfer and ring-opening process. This reaction features non-metal catalysis, simple reaction operation, excellent regioselectivity and gram-scale synthesis.
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Affiliation(s)
- Zhen Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Xue Chen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yunayuan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Huiling Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yun-Fang Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Yunkui Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Hongwei Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Bingwei Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
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4
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Lin J, Wu C, Tian X. Nickel-Catalyzed Cascade Reaction of 2-Vinylanilines with gem-Dichloroalkenes. Org Lett 2022; 24:4855-4859. [PMID: 35767682 DOI: 10.1021/acs.orglett.2c01492] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An efficient nickel-catalyzed cascade reaction of 2-vinylanilines with gem-dichloroalkenes has been developed to deliver diversely substituted quinolines in good to high yields. This protocol enables effective access to quinolines bearing various functional groups in the cascade process from readily available feedstock chemicals. Mechanistic studies suggest that two plausible pathways are involved in the IPr-nickel catalytic system.
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Affiliation(s)
- Jin Lin
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Chaoyi Wu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Xu Tian
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, NMPA and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
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5
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Li B, Yuan J, Ye X, Zhang R, Li J, Wang Y, Hu J, Dong D. PIFA-Mediated Tandem Hofmann-Type Rearrangement and Cyclization Reaction of α-Acyl-β-aminoacrylamides: Access to Polysubstituted Oxazol-2(3 H)-ones. J Org Chem 2021; 86:17944-17954. [PMID: 34872249 DOI: 10.1021/acs.joc.1c02276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and straightforward synthesis of polysubstituted oxazol-2(3H)-ones has been developed via a tandem Hofmann-type rearrangement and cyclization reaction of various α-acyl-β-aminoacrylamides mediated by phenyl iodine(III) bis(trifluoroacetate) (PIFA) in the presence of trifloroacetic acid (TFA). This novel protocol features readily available starting materials, mild reaction conditions, simple execution, high chemoselectivity, good functional group tolerance, and a metal-free oxidation process.
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Affiliation(s)
- Baibin Li
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Jingwen Yuan
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Xuebei Ye
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Rui Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Jiacheng Li
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yu Wang
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Jiana Hu
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Dewen Dong
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
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6
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Song L, Tian X, Han C, Amanpur M, Rominger F, Hashmi ASK. Catalyst-free synthesis of oxazol-2(3 H)-ones from sulfilimines and diazo compounds through a tandem rearrangement/aziridination/ring-expansion reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo00473e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Oxazol-2(3H)-ones play a significant role in the fields of organic synthesis and drug development.
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Affiliation(s)
- Lina Song
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Xianhai Tian
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Chunyu Han
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Mehran Amanpur
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Frank Rominger
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - A. Stephen K. Hashmi
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
- Chemistry Department
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7
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Zhang X, Liu C, Deng Y, Cao S. Chemo- and regioselective synthesis of polysubstituted 2-aminothiophenes by the cyclization of gem-dibromo or gem-dichloroalkenes with β-keto tertiary thioamides. Org Biomol Chem 2020; 18:7540-7544. [PMID: 32966516 DOI: 10.1039/d0ob01821j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A facile and practical method for the synthesis of 2,3,4-trisubstituted 2-aminothiophenes by the cyclization of gem-dibromoalkenes or gem-dichloroalkenes with β-keto tertiary thioamides has been developed. The cyclization reaction proceeded chemoselectively and regioselectively under metal-catalyst-free conditions, providing various structurally diverse 2,3,4-trisubstituted N,N'-dialkyl 2-aminothiophenes in good to excellent yields.
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Affiliation(s)
- Xuxue Zhang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
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8
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Singh PK, Silakari O. The Current Status of O-Heterocycles: A Synthetic and Medicinal Overview. ChemMedChem 2018; 13:1071-1087. [PMID: 29603634 DOI: 10.1002/cmdc.201800119] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 03/23/2018] [Indexed: 12/20/2022]
Abstract
O-Heterocycles have been explored in the field of medicinal chemistry for a long time, but their significance has not been duly recognised and they are often shunned in favour of N-heterocycles. The design of bioactive molecules for nearly every pathophysiological condition is primarily focused on novel N-heterocycles. The main reasons for such bias include the ease of synthesis and possible mimicking of physiological molecules by N-heterocycles. But considering only this criterion rarely provides breakthrough molecules for a given disease condition, and instead the risks of toxicity or side effects are increased with such molecules. On the other hand, owing to improved synthetic feasibility, O-heterocycles have established themselves as equally potent lead molecules for a wide range of pathophysiological conditions. In the last decade there have been hundreds of reports validating the fact that equally potent molecules can be designed and developed by using O-heterocycles, and these are also expected to have comparably low toxicity. Even so, researchers tend to remain biased toward the use of N-heterocycles over O-heterocycles. Thus, this review provides a critical analysis of the synthesis and medicinal attributes of O-heterocycles, such as pyrones, oxazolones, furanones, oxetanes, oxazolidinones, and dioxolonones, and others, reported in the last five years, underlining the need for and the advantages guiding researchers toward them.
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Affiliation(s)
- Pankaj Kumar Singh
- Molecular Modelling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Om Silakari
- Molecular Modelling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
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9
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Tang L, Huang H, Xi Y, He G, Zhu H. Pd/Cu-Catalyzed tandem head-to-tail dimerization/cycloisomerization of terminal ynamides for the synthesis of 5-vinyloxazolones. Org Biomol Chem 2017; 15:2923-2930. [DOI: 10.1039/c7ob00381a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This is the first Pd/Cu-catalyzed tandem head-to-tail dimerization/cycloisomerization of terminal ynamides for the synthesis of 5-vinyl-oxazolones.
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Affiliation(s)
- Luning Tang
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Hai Huang
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Yang Xi
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Guangke He
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Hongjun Zhu
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
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10
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Huang H, Tang L, Han X, He G, Xi Y, Zhu H. Regioselective iodoamination of terminal ynamides for the synthesis of α-amino-β,β-diiodo-enamides. Chem Commun (Camb) 2016; 52:4321-4. [DOI: 10.1039/c6cc00370b] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed the intermolecular iodoamination of terminal ynamides for the synthesis of α-amino-β,β-diiodo-enamides.
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Affiliation(s)
- Hai Huang
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Luning Tang
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Xiaobo Han
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Guangke He
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Yang Xi
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
| | - Hongjun Zhu
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- People's Republic of China
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11
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Wilkins LC, Wieneke P, Newman PD, Kariuki BM, Rominger F, Hashmi ASK, Hansmann MM, Melen RL. Pathways to Functionalized Heterocycles: Propargyl Rearrangement using B(C6F5)3. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00753] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lewis C. Wilkins
- School
of Chemistry, Cardiff University, Main Building, Cardiff CF10 3AT, Cymru/Wales, U.K
| | - Philipp Wieneke
- Organisch-Chemisches
Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Paul D. Newman
- School
of Chemistry, Cardiff University, Main Building, Cardiff CF10 3AT, Cymru/Wales, U.K
| | - Benson M. Kariuki
- School
of Chemistry, Cardiff University, Main Building, Cardiff CF10 3AT, Cymru/Wales, U.K
| | - Frank Rominger
- Organisch-Chemisches
Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches
Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
- Chemistry
Department, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia
| | - Max M. Hansmann
- Organisch-Chemisches
Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Rebecca L. Melen
- School
of Chemistry, Cardiff University, Main Building, Cardiff CF10 3AT, Cymru/Wales, U.K
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12
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Zárate-Zárate D, Aguilar R, Hernández-Benitez RI, Labarrios EM, Delgado F, Tamariz J. Synthesis of α-ketols by functionalization of captodative alkenes and divergent preparation of heterocycles and natural products. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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13
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Li Y, Cheng L, Shao Y, Jiang S, Cai J, Qing N. Practical Synthesis of Polysubstituted Haloimidazoles from 1,1-Dibromoalkenes and Amidines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500305] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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14
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Meiresonne T, Verniest G, De Kimpe N, Mangelinckx S. Synthesis of 2-Fluoro-1,4-benzoxazines and 2-Fluoro-1,4-benzoxazepin-5-ones by Exploring the Nucleophilic Vinylic Substitution (SNV) Reaction of gem-Difluoroenamides. J Org Chem 2015; 80:5111-24. [DOI: 10.1021/acs.joc.5b00507] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tamara Meiresonne
- Department of Sustainable
Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Guido Verniest
- Department of Sustainable
Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Norbert De Kimpe
- Department of Sustainable
Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Sven Mangelinckx
- Department of Sustainable
Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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15
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Huang H, He G, Zhu G, Zhu X, Qiu S, Zhu H. Palladium-Catalyzed Intramolecular Cyclization of Ynamides: Synthesis of 4-Halo-oxazolones. J Org Chem 2015; 80:3480-7. [DOI: 10.1021/acs.joc.5b00071] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hai Huang
- Department of Applied Chemistry,
College of Sciences, Nanjing Tech University, Nanjing 211816, People’s Republic of China
| | - Guangke He
- Department of Applied Chemistry,
College of Sciences, Nanjing Tech University, Nanjing 211816, People’s Republic of China
| | - Guohao Zhu
- Department of Applied Chemistry,
College of Sciences, Nanjing Tech University, Nanjing 211816, People’s Republic of China
| | - Xiaolin Zhu
- Department of Applied Chemistry,
College of Sciences, Nanjing Tech University, Nanjing 211816, People’s Republic of China
| | - Shineng Qiu
- Department of Applied Chemistry,
College of Sciences, Nanjing Tech University, Nanjing 211816, People’s Republic of China
| | - Hongjun Zhu
- Department of Applied Chemistry,
College of Sciences, Nanjing Tech University, Nanjing 211816, People’s Republic of China
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16
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Hordiyenko OV, Zubatyuk RI. Crystal structure of 4-tert-butyl-2-{2-[N-(3,3-dimethyl-2-oxobut-yl)-N-iso-propyl-carbamo-yl]phen-yl}-1-isopropyl-1H-imidazol-3-ium perchlorate. Acta Crystallogr E Crystallogr Commun 2015; 71:223-5. [PMID: 25878825 PMCID: PMC4384572 DOI: 10.1107/s2056989015001486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 01/22/2015] [Indexed: 11/10/2022]
Abstract
In the title salt, C26H40N3O2 (+)·ClO4 (-), the positive charge of the organic cation is delocalized between the two N atoms of the imidazole ring. The C N bond distances are 1.338 (2) and 1.327 (3) Å. The substituents on the benzene ring are rotated almost orthogonal with respect to this ring due to the presence of the bulky isopropyl substituents. The dihedral angle between the benzene and imidazole rings is 75.15 (12)°. Three of the O atoms of the anion are disordered over two sets of sites due to rotation around one of the O-Cl bonds. The ratio of the refined occupancies is 0.591 (14):0.409 (14). In the crystal, the cation and perchlorate anion are bound by an N-H⋯O hydrogen bond. In addition, the cation-anion pairs are linked into layers parallel to (001) by multiple weak C-H⋯O hydrogen bonds.
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Affiliation(s)
- Olga V. Hordiyenko
- Taras Shevchenko National University of Kyiv, Department of Chemistry, 64/13 Volodymyrska str., Kyiv 01601, Ukraine
| | - Roman I. Zubatyuk
- SSI Institute for Single Crystals NAS of Ukraine, 60 Lenin ave., Kharkiv 61001, Ukraine
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17
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Lu Z, Luo F, Wang L, Zhu G. Palladium-Catalyzed Direct Alkenylation of 2-Oxazolones: An Entry to 3,4,5-Trisubstituted 2-Oxazolones. J Org Chem 2013; 78:10894-901. [DOI: 10.1021/jo4018793] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Zenghui Lu
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People’s Republic of China
| | - Fang Luo
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People’s Republic of China
| | - Lina Wang
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People’s Republic of China
| | - Gangguo Zhu
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, People’s Republic of China
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18
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Lu Z, Cui W, Xia S, Bai Y, Luo F, Zhu G. Preparation of 3,4,5-Trisubstituted Oxazolones by Pd-Catalyzed Coupling of N-Alkynyl tert-Butyloxycarbamates with Aryl Halides and Related Electrophiles. J Org Chem 2012; 77:9871-7. [DOI: 10.1021/jo301794w] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zenghui Lu
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Weijian Cui
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Siyuan Xia
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Yihui Bai
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Fang Luo
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Gangguo Zhu
- Department
of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
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19
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Rivera-Fuentes P, Rekowski MVW, Schweizer WB, Gisselbrecht JP, Boudon C, Diederich F. Cascade Carbopalladation Reaction between Alkynes and gem-Dibromoolefins: Facile Access to Monoannelated Pentalenes. Org Lett 2012; 14:4066-9. [DOI: 10.1021/ol301670d] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Pablo Rivera-Fuentes
- Laboratorium für Organische Chemie, ETH Zürich, Hönggerberg, HCI, 8093 Zürich, Switzerland, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie-UMR 7177, C.N.R.S., Universitè de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Margarete von Wantoch Rekowski
- Laboratorium für Organische Chemie, ETH Zürich, Hönggerberg, HCI, 8093 Zürich, Switzerland, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie-UMR 7177, C.N.R.S., Universitè de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - W. Bernd Schweizer
- Laboratorium für Organische Chemie, ETH Zürich, Hönggerberg, HCI, 8093 Zürich, Switzerland, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie-UMR 7177, C.N.R.S., Universitè de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Jean-Paul Gisselbrecht
- Laboratorium für Organische Chemie, ETH Zürich, Hönggerberg, HCI, 8093 Zürich, Switzerland, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie-UMR 7177, C.N.R.S., Universitè de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Corinne Boudon
- Laboratorium für Organische Chemie, ETH Zürich, Hönggerberg, HCI, 8093 Zürich, Switzerland, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie-UMR 7177, C.N.R.S., Universitè de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - François Diederich
- Laboratorium für Organische Chemie, ETH Zürich, Hönggerberg, HCI, 8093 Zürich, Switzerland, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie-UMR 7177, C.N.R.S., Universitè de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France
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20
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Lu Z, Xu X, Yang Z, Kong L, Zhu G. Approach to highly functionalized oxazolones by a Pd-catalyzed cyclization of N-alkynyl tert-butyloxycarbamates. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.04.074] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Lu Z, Yang Z, Cui W, Zhu G. A Facile Access to 3,5-Disubstituted Oxazolones Featuring a Cu-catalyzed Cyclization of N-Alkynyl tert-Butyl Carbamates. CHEM LETT 2012. [DOI: 10.1246/cl.2012.636] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zenghui Lu
- Department of Chemistry, Zhejiang Normal University
| | | | - Weijian Cui
- Department of Chemistry, Zhejiang Normal University
| | - Gangguo Zhu
- Department of Chemistry, Zhejiang Normal University
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University
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22
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Recent advances in application of intramolecular Suzuki cross-coupling in cyclization and heterocyclization. MONATSHEFTE FUR CHEMIE 2012. [DOI: 10.1007/s00706-012-0746-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Yoon HS, Kim JH, Kang EJ, Jang HY. Platinum-Catalyzed Cyclization of N-Allyl Carbamates for the Synthesis of 5-Vinyloxazolidinones. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101799] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Pasqua AE, Crawford JJ, Long DL, Marquez R. Protecting Group Free, Stereocontrolled Synthesis of β-Halo-enamides. J Org Chem 2012; 77:2149-58. [DOI: 10.1021/jo202130e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adele E. Pasqua
- School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K
| | - James J. Crawford
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - De-Liang Long
- School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Rodolfo Marquez
- School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K
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25
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Chelucci G. Synthesis and Metal-Catalyzed Reactions of gem-Dihalovinyl Systems. Chem Rev 2011; 112:1344-462. [DOI: 10.1021/cr200165q] [Citation(s) in RCA: 323] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Giorgio Chelucci
- Dipartimento di Agraria, Università di Sassari, viale Italia 39, I-07100 Sassari, Italy
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26
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Abstract
A new class of stable molecules, α-boryl aldehydes, has been prepared from oxiranyl N-methyliminodiacetyl boronates by a 1,2-boryl migration with concomitant epoxide scission. A range of boryl imines, alkenes, alcohols, acids, enol ethers, enamides, and other functionalized boronic acid derivatives that are difficult or impossible to prepare using established protocols can be accessed from α-boryl aldehydes. The chemoselective transformations of these building blocks, including the facile synthesis of functionalized unnatural amino acids from silyloxy and amido vinyl boronates, attest to the potential of α-boryl aldehydes in chemical synthesis.
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Affiliation(s)
- Zhi He
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Ontario, Canada
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27
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Nicolaus N, Franke PT, Lautens M. Modular Synthesis of Naphthothiophenes by Pd-Catalyzed Tandem Direct Arylation/Suzuki Coupling. Org Lett 2011; 13:4236-9. [DOI: 10.1021/ol201585a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Norman Nicolaus
- Davenport Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
| | - Patrick T. Franke
- Davenport Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
| | - Mark Lautens
- Davenport Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
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