1
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Roy B, Avasare V, Sarkar D. Tribromide enabled step-up generation of spirolactams from esters employing oxidative dearomatization of arenols. Chem Commun (Camb) 2024; 60:9206-9209. [PMID: 39109467 DOI: 10.1039/d4cc02527j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Synthetically challenging spirolactams were developed in good yields and regio-selectivity through a step-up oxidative dearomatization of easily accessible arenols tethered to esters in the presence of quaternary ammonium tribromide as an economic oxidant and amines. The reaction mechanism associated with this unprecedented dearomative lactamisation has been forecasted with a series of controlled experiments and DFT studies.
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Affiliation(s)
- Barnali Roy
- Department of Chemistry, NIT Rourkela, Odisha 769008, India.
| | - Vidya Avasare
- Department of Chemistry, Ashoka University, Sonipat, Haryana 131029, India.
| | - Debayan Sarkar
- Organic Synthesis and Molecular Engineering Laboratory, Department of Chemistry, IIT Indore, Madhya Pradesh 453552, India.
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2
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Bray JM, Stephens SM, Weierbach SM, Vargas K, Lambert KM. Recent advancements in the use of Bobbitt's salt and 4-acetamidoTEMPO. Chem Commun (Camb) 2023; 59:14063-14092. [PMID: 37946555 DOI: 10.1039/d3cc04709a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Recent advances in synthetic methodologies for selective, oxidative transformations using Bobbitt's salt (4-acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium tetrafluoroborate, 1) and its stable organic nitroxide counterpart ACT (4-acetamidoTEMPO, 4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxyl, 2) have led to increased applications across a broad array of disciplines. Current applications and mechanistic understanding of these metal-free, environmentally benign, and easily accessible organic oxidants now span well-beyond the seminal use of 1 and 2 in selective alcohol oxidations. New synthetic methodologies for the oxidation of alcohols, ethers, amines, thiols, C-H bonds and other functional groups with 1 and 2 along with the field's current mechanistic understandings of these processes are presented alongside our contributions in this area. Exciting new areas harnessing the unique properties of these oxidants include: applications to drug discovery and natural product total synthesis, the development of new electrocatalytic methods for depolymerization of lignin and modification of other biopolymers, in vitro and in vivo nucleoside modifications, applications in supramolecular catalysis, the synthesis of new polymers and materials, enhancements in the design of organic redox flow batteries, uses in organic fuel cells, applications and advancements in energy storage, the development of electrochemical sensors, and the production of renewable fuels.
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Affiliation(s)
- Jean M Bray
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Shannon M Stephens
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Shayne M Weierbach
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Karen Vargas
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Kyle M Lambert
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
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3
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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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4
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Weierbach SM, Reynolds RP, Stephens SM, Vlasakakis KV, Ritter RT, White OM, Patel NH, Hayes EC, Dunmire S, Lambert KM. Chemoselective Oxidation of Thiols with Oxoammonium Cations. J Org Chem 2023; 88:11392-11410. [PMID: 35926190 DOI: 10.1021/acs.joc.2c01097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxidation of various aryl and aliphatic thiols with the commercially available and environmentally benign reagent Bobbitt's salt (1) has been investigated. The reaction affords the corresponding disulfide products in good to excellent yields (71-99%) and can be accomplished in water, methanol, or acetonitrile solvent. Moreover, the process is highly chemoselective, tolerating traditionally oxidation-labile groups such as free amines and alcohols. Combined experimental and computational studies reveal that the oxidation takes place via a polar two-electron process with concomitant and unexpected deoxygenation of the oxoammonium cation through homolysis of the weak N-O bond, differing from prototypical radical-based thiol couplings. This unusual consumption of the oxidant has significant implications for the development of new nitroxide-based radical traps for probing S-centered radicals, the advancement of new electrochemical or catalytic processes involving nitroxide/oxoammonium salt redox couples, and applications to biological systems.
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Affiliation(s)
- Shayne M Weierbach
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Robert P Reynolds
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Shannon M Stephens
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Kostantinos V Vlasakakis
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Ramsey T Ritter
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Olivia M White
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Nishi H Patel
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Eric C Hayes
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Sydney Dunmire
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Kyle M Lambert
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
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5
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Sharma V, Chavan KA, Mali G, Sarkar D, Lama P, Majumder M, Erande RD, Metre RK. A Catecholaldimine-Based Ni II-Complex as an Effective Catalyst for the Direct Conversion of Alcohols to trans-Cinnamonitriles and Aldehydes. J Org Chem 2023. [PMID: 37155715 DOI: 10.1021/acs.joc.2c03067] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A nickel(II) complex [Ni(HL)2] 1 was synthesized by treatment of a new catecholaldimine-based ligand with NiCl2·6H2O in methanol at room temperature. Complex 1 showed excellent catalytic activity where aromatic and heterocyclic alcohols were rapidly converted into trans-cinnamonitrile in a one-pot manner via oxidative olefination in the presence of KOH. The potential of the disclosed catalyst and the results obtained for the direct conversion of alcohols to two different functionalities (trans-cinnamonitrile and aldehydes) are well supported by DFT studies.
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Affiliation(s)
- Vivek Sharma
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Kailas Arjun Chavan
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Ghanshyam Mali
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Dipanjana Sarkar
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Prem Lama
- CSIR-Indian Institute of Petroleum, Haridwar Road, Mokhampur, Dehradun 248005, India
| | - Moumita Majumder
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Jodhpur, Jodhpur 342030, India
| | - Rohan D Erande
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
| | - Ramesh K Metre
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342030, Rajasthan, India
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6
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Lewis SG, Dadum AG, McLean D, Buenavista J, Myers J, Lambert KM, Fair JD. Chemoselective Oxidation of Alcohols in the Presence of Amines Using an Oxoammonium Salt. Tetrahedron 2023; 131:133226. [PMID: 36742269 PMCID: PMC9894077 DOI: 10.1016/j.tet.2022.133226] [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] [Indexed: 12/23/2022]
Abstract
The oxidation of alcohols in the presence of reactive amines employing the commercially available oxoammonium cation, "Bobbitt's salt" is described. The oxidation is accomplished under acidic conditions and subsequent treatment with a suitable base affords a convenient one-pot method to access imines in good to excellent isolated yields (74-99%).
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Affiliation(s)
- Stephonda G. Lewis
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, 23529, United States
| | - Abra G. Dadum
- Maida Department of Chemistry, Biochemistry, Physics and Engineering, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705, United States
| | - David McLean
- Maida Department of Chemistry, Biochemistry, Physics and Engineering, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705, United States
| | - Jhennalin Buenavista
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, 23529, United States
| | - Jaileen Myers
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, 23529, United States
| | - Kyle M. Lambert
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, 23529, United States
| | - Justin D. Fair
- Maida Department of Chemistry, Biochemistry, Physics and Engineering, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705, United States
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7
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Cui Y, Zhao Y, Shen J, Zhang G, Ding C. The stable "F-SO 2 +" donor provides a mild and efficient approach to nitriles and amides. RSC Adv 2022; 12:33064-33068. [PMID: 36425170 PMCID: PMC9672908 DOI: 10.1039/d2ra05890a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 10/20/2022] [Indexed: 10/17/2023] Open
Abstract
In this update, we developed a mild, efficient and practical method using fluorosulfuryl imidazolium salt A as an environment friendly promoter for conversion of oximes to nitriles or amides via β-elimination or Beckmann rearrangement in almost quantitative yield in 10 minutes. The target products were generated in gram-scale and could be collected through crystallization without silica gel column purification in excellent yield.
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Affiliation(s)
- Yin Cui
- College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Yiyong Zhao
- Zhejiang Ecological Environment Low Carbon Development Center Hangzhou 310014 P. R. China
| | - Junjie Shen
- Zhejiang Kefeng New Material Co. LTD Huzhou 313200 P. R. China
| | - Guofu Zhang
- College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Chengrong Ding
- College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
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8
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Barbasiewicz M, Tryniszewski M. Gram-Scale Preparation of Acyl Fluorides and Their Reactions with Hindered Nucleophiles. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1649-5460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractA series of acyl fluorides was synthesized at 100 mmol scale using phase-transfer-catalyzed halogen exchange between acyl chlorides and aqueous bifluoride solution. The convenient procedure consists of vigorous stirring of the biphasic mixture at room temperature, followed by extraction and distillation. Isolated acyl fluorides (usually 7–20 g) display excellent purity and can be transformed into sterically hindered amides and esters when treated with lithium amide bases and alkoxides under mild conditions.
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9
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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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10
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Kodama K, Takase F, Hirose T. Direct enantioseparation of axially chiral 1,1'-biaryl-2,2'-diols using amidine-based resolving agents. RSC Adv 2021; 11:18162-18170. [PMID: 35480945 PMCID: PMC9033420 DOI: 10.1039/d1ra03546k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 05/13/2021] [Indexed: 11/30/2022] Open
Abstract
Amidine-based optically active resolving agents for enantiomer separation of axially chiral 1,1'-biaryl-2,2'-diols have been developed. A strongly basic amidine bearing no substituents on its nitrogen atoms enables the formation of their diastereomeric salts upon being mixed with weakly acidic phenol derivatives. Enantiopure 1,1'-biaryl-2,2'-diols can be obtained in high yields after only one crystallization of their salts with the chiral amidine derived from dehydroabietic acid. X-ray crystallography revealed that the amidine moiety forms a salt with the phenol group and additional intermolecular NH/π interactions contribute to the efficient chiral recognition process.
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Affiliation(s)
- Koichi Kodama
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University Japan
| | - Fusato Takase
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University Japan
| | - Takuji Hirose
- Department of Applied Chemistry, Graduate School of Science and Engineering, Saitama University Japan
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11
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Tian Z, Han C, Zhao Y, Dai W, Lian X, Wang Y, Zheng Y, Shi Y, Pan X, Huang Z, Li H, Chen W. Efficient photocatalytic hydrogen peroxide generation coupled with selective benzylamine oxidation over defective ZrS 3 nanobelts. Nat Commun 2021; 12:2039. [PMID: 33795681 PMCID: PMC8016833 DOI: 10.1038/s41467-021-22394-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 03/03/2021] [Indexed: 02/01/2023] Open
Abstract
Photocatalytic hydrogen peroxide (H2O2) generation represents a promising approach for artificial photosynthesis. However, the sluggish half-reaction of water oxidation significantly limits the efficiency of H2O2 generation. Here, a benzylamine oxidation with more favorable thermodynamics is employed as the half-reaction to couple with H2O2 generation in water by using defective zirconium trisulfide (ZrS3) nanobelts as a photocatalyst. The ZrS3 nanobelts with disulfide (S22-) and sulfide anion (S2-) vacancies exhibit an excellent photocatalytic performance for H2O2 generation and simultaneous oxidation of benzylamine to benzonitrile with a high selectivity of >99%. More importantly, the S22- and S2- vacancies can be separately introduced into ZrS3 nanobelts in a controlled manner. The S22- vacancies are further revealed to facilitate the separation of photogenerated charge carriers. The S2- vacancies can significantly improve the electron conduction, hole extraction, and kinetics of benzylamine oxidation. As a result, the use of defective ZrS3 nanobelts yields a high production rate of 78.1 ± 1.5 and 32.0 ± 1.2 μmol h-1 for H2O2 and benzonitrile, respectively, under a simulated sunlight irradiation.
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Affiliation(s)
- Zhangliu Tian
- grid.263488.30000 0001 0472 9649SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China ,grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, Singapore
| | - Cheng Han
- grid.263488.30000 0001 0472 9649SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China
| | - Yao Zhao
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, China
| | - Wenrui Dai
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, Singapore
| | - Xu Lian
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, Singapore
| | - Yanan Wang
- grid.4280.e0000 0001 2180 6431Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, Singapore
| | - Yue Zheng
- grid.4280.e0000 0001 2180 6431Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, Singapore
| | - Yi Shi
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, Singapore
| | - Xuan Pan
- grid.263488.30000 0001 0472 9649SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China ,grid.4280.e0000 0001 2180 6431Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, Singapore
| | - Zhichao Huang
- grid.263488.30000 0001 0472 9649SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, China ,grid.4280.e0000 0001 2180 6431Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, Singapore
| | - Hexing Li
- grid.412531.00000 0001 0701 1077International Joint Lab on Resource Chemistry, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, China
| | - Wei Chen
- grid.4280.e0000 0001 2180 6431Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, China ,grid.4280.e0000 0001 2180 6431Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, Singapore
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12
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Nandi J, Hutcheson EL, Leadbeater NE. Combining photoredox catalysis and oxoammonium cations for the oxidation of aromatic alcohols to carboxylic acids. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152632] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Jana A, Ravichandiran V, Swain SP. Application of organometallic catalysts for the synthesis of o-tolyl benzonitrile, a key starting material for sartans. NEW J CHEM 2021. [DOI: 10.1039/d1nj03380h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This review describes methods for the synthesis of o-tolyl benzonitrile, such as Pd-, Ni-catalyzed Suzuki, Negishi and Kumada couplings reactions.
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Affiliation(s)
- Anupam Jana
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Kolkata, 168, Maniktala Main Road, Kolkata-700054, India
| | - V. Ravichandiran
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Kolkata, 168, Maniktala Main Road, Kolkata-700054, India
| | - Sharada Prasanna Swain
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Kolkata, 168, Maniktala Main Road, Kolkata-700054, India
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14
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Patil RD, Gupta MK. Methods of Nitriles Synthesis from Amines through Oxidative Dehydrogenation. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000635] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rajendra D. Patil
- School of Chemical Sciences KCES's Moolji Jaitha College, Jalgaon (An Autonomous college affiliated to KBC, North Maharashtra University, Jalgaon) Maharashtra India- 425002
| | - Maneesh Kumar Gupta
- Department of Chemistry Hotilal Ramnath College (A constituent unit of Jai Prakash University), Amnour, Chapra Bihar 841401
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15
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Nitrile Synthesis by Aerobic Oxidation of Primary Amines and
in
situ
Generated Imines from Aldehydes and Ammonium Salt with Grubbs Catalyst. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000663] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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16
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Nandi J, Vaughan MZ, Sandoval AL, Paolillo JM, Leadbeater NE. Oxidative Amidation of Amines in Tandem with Transamidation: A Route to Amides Using Visible-Light Energy. J Org Chem 2020; 85:9219-9229. [PMID: 32539393 DOI: 10.1021/acs.joc.0c01222] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A methodology is reported for preparing amides using amines as an acyl source. The protocol involves the visible-light-promoted oxidative amidation of amines with pyrazole to synthesize N-acyl pyrazoles followed by transamidation. By combining photoredox catalysis with oxoammonium cations in the presence of sodium persulfate as a terminal oxidant, the N-acyl pyrazoles could be prepared efficiently and effectively using blue LEDs. The transamidation step was performed without the need to purify the N-acyl pyrazole intermediate, and a range of amides were generated in good to excellent yields.
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Affiliation(s)
- Jyoti Nandi
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Matthew Z Vaughan
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Arturo León Sandoval
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Joshua M Paolillo
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Nicholas E Leadbeater
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
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17
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He J, Dong J, Su L, Wu S, Liu L, Yin SF, Zhou Y. Selective Oxidative Cleavage of 3-Methylindoles with Primary Amines Affording Quinazolinones. Org Lett 2020; 22:2522-2526. [DOI: 10.1021/acs.orglett.0c00271] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Junhui He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Jianyu Dong
- Department of Educational Science, Hunan First Normal University, Changsha 410205, China
| | - Lebin Su
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Shaofeng Wu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Lixin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yongbo Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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18
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Zhuang H, Li H, Zhang S, Yin Y, Han F, Sun C, Miao C. TEMPO and its derivatives mediated reactions under transition-metal-free conditions. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.06.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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19
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Lee S, Kim SA, Jang HY. Aerobic Oxidation of Benzylic Carbons Using a Guanidine Base. ACS OMEGA 2019; 4:17934-17938. [PMID: 31681903 PMCID: PMC6822219 DOI: 10.1021/acsomega.9b03064] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
Metal-free reaction conditions featuring oxygen and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) were employed for the selective oxidation of benzyl amines and active methylene compounds to afford various amides and ketones. Owing to the strong basicity of guanidine bases, TBD is presumed to play an important role in the cleavage of the C-H bond at the benzylic position of peroxide intermediates, which were formed by the reaction with oxygen.
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Affiliation(s)
- Seulchan Lee
- Department of Energy Systems Research, Ajou University, Suwon 16499, Korea
| | - Si Ae Kim
- Department of Energy Systems Research, Ajou University, Suwon 16499, Korea
| | - Hye-Young Jang
- Department of Energy Systems Research, Ajou University, Suwon 16499, Korea
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20
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Kim J, Golime G, Kim HY, Oh K. Copper(II)‐Catalyzed Aerobic Oxidation of Amines: Divergent Reaction Pathways by Solvent Control to Imines and Nitriles. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900302] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Jihyeon Kim
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
| | - Gangadhararao Golime
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
| | - Hun Young Kim
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
| | - Kyungsoo Oh
- Center for Metareceptome Research, College of PharmacyChung-Ang University 84 Heukseok-ro, Dongjak Seoul 06974 Republic of Korea
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21
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Castañeda MM, Bargues JM, Primo J, Fuertes IN. Synthesis of the Sex Pheromone of the Oleander Scale ( Aspidiotus nerii). J Org Chem 2019; 84:8578-8588. [PMID: 31244159 DOI: 10.1021/acs.joc.9b01001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A total synthesis of the oleander scale [ Aspidiotus nerii (Bouche)] sex pheromone, the unique sesquiterpenoid containing a cyclobutane moiety of this class of compounds, has been developed. In order to implement this sex pheromone as a new environmentally friendly tool to manage this pest, a more cost-effective, multigram synthesis was required. This new synthetic route, having a Blaise reaction, iron-catalyzed carbon-carbon coupling, and [2 + 2] photocycloaddition reactions as key steps, provides a general access to 4-alkyl lactones as well as a robust access to the target sex pheromone. Starting from readily available compounds as 3-hydroxypropanenitrile, ethyl bromoacetate, and 2-acetyl butyrolactone, the synthetic sequence afforded the A. nerii sex pheromone with minimum intermediate purification and good overall yield in nine linear steps.
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Affiliation(s)
- Mary Montaño Castañeda
- CEQA-Instituto Agroforestal del Mediterráneo , Universitat Politècnica de València , Camino de Vera s/n, edificio 6C-5a planta, 46022 Valencia , Spain
| | - Javier Marzo Bargues
- Ecología y Protección Agrícola SL , Pol. Ind. Ciutat de Carlet , 46240 Carlet , Valencia , Spain
| | - Jaime Primo
- CEQA-Instituto Agroforestal del Mediterráneo , Universitat Politècnica de València , Camino de Vera s/n, edificio 6C-5a planta, 46022 Valencia , Spain
| | - Ismael Navarro Fuertes
- Ecología y Protección Agrícola SL , Pol. Ind. Ciutat de Carlet , 46240 Carlet , Valencia , Spain
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22
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Chinnusamy T. Recyclable MeOPEG-clicked TEMPO catalyst for one-pot aerobic double dehydrogenation of alcohols to nitriles. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2018.08.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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23
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Zhu C, Chen F, Liu C, Zeng H, Yang Z, Wu W, Jiang H. Copper-Catalyzed Unstrained C–C Single Bond Cleavage of Acyclic Oxime Acetates Using Air: An Internal Oxidant-Triggered Strategy toward Nitriles and Ketones. J Org Chem 2018; 83:14713-14722. [DOI: 10.1021/acs.joc.8b02103] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Fulin Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Chi Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Hao Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Zhiyi Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
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24
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Huang Y, Chong X, Liu C, Liang Y, Zhang B. Boosting Hydrogen Production by Anodic Oxidation of Primary Amines over a NiSe Nanorod Electrode. Angew Chem Int Ed Engl 2018; 57:13163-13166. [DOI: 10.1002/anie.201807717] [Citation(s) in RCA: 202] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Yi Huang
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Xiaodan Chong
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Cuibo Liu
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Yu Liang
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Bin Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
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25
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Huang Y, Chong X, Liu C, Liang Y, Zhang B. Boosting Hydrogen Production by Anodic Oxidation of Primary Amines over a NiSe Nanorod Electrode. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807717] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yi Huang
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Xiaodan Chong
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Cuibo Liu
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Yu Liang
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Bin Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University, and Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
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26
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Shen Y, Zhou Y, Jiang L, Ding G, Luo L, Zhang Z, Xie X. Selective aerobic oxidation of benzylic amines to aryl nitriles catalyzed by CuBr2/N-methyl imidazole. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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27
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Lambert KM, Stempel ZD, Kiendzior SM, Bartelson AL, Bailey WF. Enhancement of the Oxidizing Power of an Oxoammonium Salt by Electronic Modification of a Distal Group. J Org Chem 2018; 82:11440-11446. [PMID: 28968489 DOI: 10.1021/acs.joc.7b01965] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The multigram preparation and characterization of a novel TEMPO-based oxoammonium salt, 2,2,6,6-tetramethyl-4-(2,2,2-trifluoroacetamido)-1-oxopiperidinium tetrafluoroborate (5), and its corresponding nitroxide (4) are reported. The solubility profile of 5 in solvents commonly used for alcohol oxidations differs substantially from that of Bobbitt's salt, 4-acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium tetrafluoroborate (1). The rates of oxidation of a representative series of primary, secondary, and benzylic alcohols by 1 and 5 in acetonitrile solvent at room temperature have been determined, and oxoammonium salt 5 has been found to oxidize alcohols more rapidly than does 1. The rate of oxidation of meta- and para-substituted benzylic alcohols by either 1 or 5 displays a strong linear correlation to Hammett parameters (r > 0.99) with slopes (ρ) of -2.7 and -2.8, respectively, indicating that the rate-limiting step in the oxidations involves hydride abstraction from the carbinol carbon of the alcohol substrate.
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Affiliation(s)
- Kyle M Lambert
- Department of Chemistry, University of Connecticut , Storrs, Connecticut 06269-3060, United States
| | - Zachary D Stempel
- Department of Chemistry, University of Connecticut , Storrs, Connecticut 06269-3060, United States
| | - Sadie M Kiendzior
- Department of Chemistry, University of Saint Joseph , West Hartford, Connecticut 06117-2791, United States
| | - Ashley L Bartelson
- Department of Chemistry, Seton Hill University , Greensburg, Pennsylvania 15601, United States
| | - William F Bailey
- Department of Chemistry, University of Connecticut , Storrs, Connecticut 06269-3060, United States
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28
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Wiberg KB, Bailey WF, Lambert KM, Stempel ZD. The Anomeric Effect: It’s Complicated. J Org Chem 2018; 83:5242-5255. [DOI: 10.1021/acs.joc.8b00707] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kenneth B. Wiberg
- Department of Chemistry, Yale University, 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - William F. Bailey
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Kyle M. Lambert
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
| | - Zachary D. Stempel
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
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29
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Synthesis of Functionalized Nitriles by Microwave-Promoted Fragmentations of Cyclic Iminyl Radicals. Chemistry 2017; 24:594-598. [DOI: 10.1002/chem.201705728] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Indexed: 12/16/2022]
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30
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Brisar R, Hollmann D, Mejia E. Pyrazine Radical Cations as a Catalyst for the Aerobic Oxidation of Amines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700949] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rok Brisar
- Leibniz Institute for Catalysis; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Dirk Hollmann
- Leibniz Institute for Catalysis; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Esteban Mejia
- Leibniz Institute for Catalysis; Albert-Einstein-Straße 29a 18059 Rostock Germany
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31
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Gaspa S, Porcheddu A, Valentoni A, Garroni S, Enzo S, De Luca L. A Mechanochemical-Assisted Oxidation of Amines to Carbonyl Compounds and Nitriles. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700689] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Silvia Gaspa
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; via Vienna 2 07100 Sassari Italy
| | - Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Cagliari; Cittadella Universitaria 09042 Monserrato Italy
| | - Antonio Valentoni
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; via Vienna 2 07100 Sassari Italy
| | - Sebastiano Garroni
- International Research Centre in Critical Raw Materials-ICCRAM; University of Burgos; Plaza Misael Banuelos s/n 09001 Burgos Spain
- Advanced Materials; Nuclear Technology and Applied Bio/Nanotechnology, Consolidated Research Unit UIC-154, University of Burgos; Hospital del Rey s/n 09001 Burgos Spain
| | - Stefano Enzo
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; via Vienna 2 07100 Sassari Italy
| | - Lidia De Luca
- Dipartimento di Chimica e Farmacia; Università degli Studi di Sassari; via Vienna 2 07100 Sassari Italy
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32
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Bognár B, Varga B, Kálai T, Csokona V, Gulyás Fekete G, Sár C, Hideg K. Reaction of β-Bromo-β,γ-unsaturated Pyrroline Nitroxide Aldehydes and Nitriles with Aromatic N, S-Binucleophiles. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Balázs Bognár
- Institute of Organic and Medicinal Chemistry; University of Pécs; Szigeti st. 12 Pécs H-7624 Hungary
| | - Boglárka Varga
- Institute of Organic and Medicinal Chemistry; University of Pécs; Szigeti st. 12 Pécs H-7624 Hungary
| | - Tamás Kálai
- Institute of Organic and Medicinal Chemistry; University of Pécs; Szigeti st. 12 Pécs H-7624 Hungary
- Szentágothai Research Centre; Ifjúság st. 20 Pécs H-7624 Hungary
| | - Viola Csokona
- Institute of Organic and Medicinal Chemistry; University of Pécs; Szigeti st. 12 Pécs H-7624 Hungary
| | | | - Cecília Sár
- Institute of Organic and Medicinal Chemistry; University of Pécs; Szigeti st. 12 Pécs H-7624 Hungary
| | - Kálmán Hideg
- Institute of Organic and Medicinal Chemistry; University of Pécs; Szigeti st. 12 Pécs H-7624 Hungary
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33
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Wu H, Yang P, Du Z, Fu Y. Manganese-Mediated Aerobic Oxidative Olefination of (Het)Arenemethanols with Acetonitrile: Highly Stereoselective Preparation of Trans-Cinnamonitrile Derivatives. ChemistrySelect 2017. [DOI: 10.1002/slct.201700023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hui Wu
- Key Laboratory of Eco-Environment Related Polymer Materials of Ministry of Education; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 P. R. China
| | - Peng Yang
- Key Laboratory of Eco-Environment Related Polymer Materials of Ministry of Education; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 P. R. China
| | - Zhengyin Du
- Key Laboratory of Eco-Environment Related Polymer Materials of Ministry of Education; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 P. R. China
| | - Ying Fu
- Key Laboratory of Eco-Environment Related Polymer Materials of Ministry of Education; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 P. R. China
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34
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Electrocatalytic synthesis of nitriles from aldehydes with ammonium acetate as the nitrogen source. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2016.12.168] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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35
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Zhou PJ, Li CK, Zhou SF, Shoberu A, Zou JP. Copper-catalyzed TEMPO oxidative cleavage of 1,3-diketones and β-keto esters for the synthesis of 1,2-diketones and α-keto esters. Org Biomol Chem 2017; 15:2629-2637. [DOI: 10.1039/c7ob00241f] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper-catalyzed, TEMPO oxidized cleavage of α-methylene of 1,3-diketones and β-keto esters to form 1,2-diketones and α-keto esters.
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Affiliation(s)
- Peng-Jun Zhou
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry and Chemical Engineering
- Soochow University
- Suzhou
- China
| | - Cheng-Kun Li
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry and Chemical Engineering
- Soochow University
- Suzhou
- China
| | - Shao-Fang Zhou
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry and Chemical Engineering
- Soochow University
- Suzhou
- China
| | - Adedamola Shoberu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry and Chemical Engineering
- Soochow University
- Suzhou
- China
| | - Jian-Ping Zou
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry and Chemical Engineering
- Soochow University
- Suzhou
- China
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36
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Nandi J, Ovian JM, Kelly CB, Leadbeater NE. Oxidative functionalisation of alcohols and aldehydes via the merger of oxoammonium cations and photoredox catalysis. Org Biomol Chem 2017; 15:8295-8301. [DOI: 10.1039/c7ob02243c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The merger of oxoammonium cation mediated oxidation with visible-light photoredox catalysis is demonstrated in the oxidative amidation of aldehydes and alcohols.
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Affiliation(s)
- Jyoti Nandi
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
| | - John M. Ovian
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
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37
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Freudenberg J, Poppe S, Binder WH. Precision polymers containing main-chain-amino acids: ADMET polymerization and crystallization. RSC Adv 2017. [DOI: 10.1039/c7ra10485e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New PE-type precision oligomers displaying different amino acids (chiral/achiral, polar/non-polar) placed at every 19th carbon atom are presented.
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Affiliation(s)
- Jan Freudenberg
- Martin Luther University Halle-Wittenberg
- Faculty of Natural Sciences II
- Chair of Macromolecular Chemistry
- D-06120 Halle
- Germany
| | - Silvio Poppe
- Martin Luther University Halle-Wittenberg
- Faculty of Natural Sciences II
- Chair of Organic Chemistry
- D-06120 Halle
- Germany
| | - Wolfgang H. Binder
- Martin Luther University Halle-Wittenberg
- Faculty of Natural Sciences II
- Chair of Macromolecular Chemistry
- D-06120 Halle
- Germany
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38
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Bartelson AL, Lambert KM, Bobbitt JM, Bailey WF. Recent Developments in the Nitroxide-Catalyzed Oxidation of Amines: Preparation of Imines and Nitriles. ChemCatChem 2016. [DOI: 10.1002/cctc.201600858] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ashley L. Bartelson
- Division of Natural & Health Sciences; Seton Hill University; 1 Seton Hill Drive Greensburg PA 15601 USA
| | - Kyle M. Lambert
- Department of Chemistry; University of Connecticut; 55 North Eagleville Road Storrs CT 06269 USA
| | - James M. Bobbitt
- Department of Chemistry; University of Connecticut; 55 North Eagleville Road Storrs CT 06269 USA
| | - William F. Bailey
- Department of Chemistry; University of Connecticut; 55 North Eagleville Road Storrs CT 06269 USA
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39
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Gu L, Jin C, Zhang H, Liu J, Ganpeng Li GL, Yang Z. An aerobic Cu-mediated practical approach to aromatic nitriles using cyanide anions as the nitrogen source. Org Biomol Chem 2016; 14:6687-90. [DOI: 10.1039/c6ob01269h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A copper-catalyzed cyanation of aryl methyl ketones using cyanide anions as the nitrogen source was developed. The reaction showed a broad substrate scope with moderate to excellent yields.
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Affiliation(s)
- Lijun Gu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education Yunnan Minzu University
- Kunming
- China
| | - Cheng Jin
- New United Group Company Limited
- Changzhou
- China
| | - Hongtao Zhang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education Yunnan Minzu University
- Kunming
- China
| | - Jiyan Liu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education Yunnan Minzu University
- Kunming
- China
| | - Ganpeng Li Ganpeng Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education Yunnan Minzu University
- Kunming
- China
| | - Zhi Yang
- Yunnan Bai Yao Group Innovation and R&D Center
- China
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