101
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Xu M, Bullard KK, Nicely AM, Gutekunst WR. Resonance promoted ring-opening metathesis polymerization of twisted amides. Chem Sci 2019; 10:9729-9734. [PMID: 32055341 PMCID: PMC6993617 DOI: 10.1039/c9sc03602d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 08/30/2019] [Indexed: 12/31/2022] Open
Abstract
The living ring-opening metathesis polymerization (ROMP) of an unsaturated twisted amide using the third-generation Grubbs initiator is described. Unlike prior examples of ROMP monomers that rely on angular or steric strain for propagation, this system is driven by resonance destabilization of the amide that arises from geometric constraints of the bicyclic framework. Upon ring-opening, the amide can rotate and rehybridize to give a stabilized and planar conjugated system that promotes living propagation. The absence of other strain elements in the twisted amide is supported by the inability of a carbon analogue of the monomer to polymerize and computational studies that find resonance destabilization accounts for 11.3 kcal mol-1 of the overall 12.0 kcal mol-1 ring strain. The twisted amide polymerization is capable of preparing high molecular weight polymers rapidly at room temperature, and post-polymerization modification combined with 2D NMR spectroscopy confirms a regioirregular polymer microstructure.
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Affiliation(s)
- Mizhi Xu
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
| | - Krista K Bullard
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
| | - Aja M Nicely
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
| | - Will R Gutekunst
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
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102
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Khosravi F, Gholinejad M, Lledó D, Grindlay G, Nájera C, Sansano JM. 1-Butyl-3-methyl-2-(diphenylphosphino)imidazalolium hexafluorophosphate as an efficient ligand for recoverable palladium-catalyzed Suzuki-Miyaura reaction in neat water. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.120941] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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103
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Thimma Sambamoorthy M, Rengan R, Jan Grzegorz M. Efficient construction of C–C bonds from aryl halides/aryl esters with arylboronic acids catalysed by palladium(II) thiourea complexes. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Manikandan Thimma Sambamoorthy
- Centre for Organometallic Chemistry, School of ChemistryBharathidasan University Tiruchirappalli 620 024 Tamilnadu India
| | - Ramesh Rengan
- Centre for Organometallic Chemistry, School of ChemistryBharathidasan University Tiruchirappalli 620 024 Tamilnadu India
| | - Malecki Jan Grzegorz
- Department of CrystallographyInstitute of Chemistry, University of Silesia 40‐006 Katowice Poland
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104
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Ogiwara Y, Sakai N. Carbonsäurefluoride in der Katalyse durch späte Übergangsmetalle. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902805] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yohei Ogiwara
- Department of Pure and Applied ChemistryFaculty of Science and TechnologyTokyo University of Science Noda Chiba 278-8510 Japan
| | - Norio Sakai
- Department of Pure and Applied ChemistryFaculty of Science and TechnologyTokyo University of Science Noda Chiba 278-8510 Japan
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105
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Zheng Y, Newman SG. Nickel‐Catalyzed Domino Heck‐Type Reactions Using Methyl Esters as Cross‐Coupling Electrophiles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911372] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yan‐Long Zheng
- Centre for Catalysis Research and InnovationDepartment of Chemistry and Biomolecular SciencesUniversity of Ottawa 10 Marie-Curie Ottawa Ontario K1N 6N5 Canada
| | - Stephen G. Newman
- Centre for Catalysis Research and InnovationDepartment of Chemistry and Biomolecular SciencesUniversity of Ottawa 10 Marie-Curie Ottawa Ontario K1N 6N5 Canada
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106
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Xiong L, Deng R, Liu T, Luo Z, Wang Z, Zhu X, Wang H, Zeng Z. Selective C−N Bond Cleavage of
N
‐Acylisatins: Towards High Performance Acylation/Arylation/Transamination Reagents. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900819] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Li Xiong
- College of Chemistry and EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Rong Deng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapySun Yat-sen University Cancer Center Guangzhou 510060 People's Republic of China
| | - Tingting Liu
- College of Chemistry and EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Zhongfeng Luo
- College of Chemistry and EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Zijia Wang
- College of Chemistry and EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Xiao‐Feng Zhu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapySun Yat-sen University Cancer Center Guangzhou 510060 People's Republic of China
| | - Hui Wang
- College of Chemistry and EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
| | - Zhuo Zeng
- College of Chemistry and EnvironmentSouth China Normal University Guangzhou 510006 People's Republic of China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai People's Republic of China 200032
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107
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Nikovia C, Sougioltzoupoulou E, Rigas V, Pitsikalis M. Macromolecular Brushes Based on Poly(L-Lactide) and Poly(ε-Caprolactone) Single and Double Macromonomers via ROMP. Synthesis, Characterization and Thermal Properties. Polymers (Basel) 2019; 11:E1606. [PMID: 31581578 PMCID: PMC6835319 DOI: 10.3390/polym11101606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 09/26/2019] [Accepted: 09/29/2019] [Indexed: 01/07/2023] Open
Abstract
Single and double poly(L-lactide) (PLLA) and poly(ε-caprolactone) (PCL) macromonomers having a norbornenyl polymerizable group were prepared by conventional Ring Opening Polymerization (ROP). These macromonomers were further subjected to ring opening metathesis polymerization (ROMP) reactions in order to produce double polymer brushes consisting of PLLA or PCL side chains on a polynorbornene (PNBE) backbone. Statistical or block ring opening metathesis copolymerization of the PLLA and PCL macromonomers afforded the corresponding random and block double brushes. Sequential ROMP of the single PLLA, PCL and PLLA macromonomers resulted in the synthesis of the corresponding triblock copolymer brush. The molecular characteristics of the macromolecular brushes were obtained by 1H-NMR spectroscopy and Size Exclusion Chromatography. The thermal properties of the samples were studied by thermogravimetric analysis, TGA, Differential Thermogravimetry, DTG and Differential Scanning Calorimetry, DSC.
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Affiliation(s)
- Christiana Nikovia
- Department of Chemistry, Industrial Chemistry Laboratory, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece.
| | - Eleftheria Sougioltzoupoulou
- Department of Chemistry, Industrial Chemistry Laboratory, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece.
| | - Vyron Rigas
- Department of Chemistry, Industrial Chemistry Laboratory, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece.
| | - Marinos Pitsikalis
- Department of Chemistry, Industrial Chemistry Laboratory, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece.
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108
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Liu C, Lalancette R, Szostak R, Szostak M. Sterically Hindered Ketones via Palladium-Catalyzed Suzuki–Miyaura Cross-Coupling of Amides by N–C(O) Activation. Org Lett 2019; 21:7976-7981. [DOI: 10.1021/acs.orglett.9b02961] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Chengwei Liu
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Roger Lalancette
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Roman Szostak
- Department of Chemistry, Wroclaw University, F. Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Michal Szostak
- College of Chemistry and Chemical Engineering and Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an 710021, China
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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109
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Biswas S, Bheemireddy NR, Bal M, Van Steijvoort BF, Maes BUW. Directed C–H Functionalization Reactions with a Picolinamide Directing Group: Ni-Catalyzed Cleavage and Byproduct Recycling. J Org Chem 2019; 84:13112-13123. [DOI: 10.1021/acs.joc.9b02299] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Sovan Biswas
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | | | - Mathias Bal
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Ben F. Van Steijvoort
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Bert U. W. Maes
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
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110
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Tao J, Yu W, Luo J, Wang T, Ge W, Zhang Z, Yang B, Xiong F. Na2CO3-promoted thioesterification via N–C bond cleavage of amides to construct thioester derivatives. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.1177/1747519819873514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A mild, efficient, and transition-metal-free catalytic strategy is developed to construct thioesters via selective N–C bond cleavage of Boc2-activated primary amides. This strategy is successfully carried out with stoichiometric Na2CO3 as the base and provides the corresponding products in moderate to excellent yields.
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Affiliation(s)
- Jiasi Tao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, P.R. China
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology of Jiangxi Province, Jiangxi Normal University, Nanchang, P.R. China
| | - Weijie Yu
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology of Jiangxi Province, Jiangxi Normal University, Nanchang, P.R. China
| | - Jin Luo
- Analytical and Testing Center, Jiangxi Normal University, Nanchang, P.R. China
| | - Tao Wang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, P.R. China
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology of Jiangxi Province, Jiangxi Normal University, Nanchang, P.R. China
| | - Wanling Ge
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology of Jiangxi Province, Jiangxi Normal University, Nanchang, P.R. China
| | - Ziwei Zhang
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology of Jiangxi Province, Jiangxi Normal University, Nanchang, P.R. China
| | - Bingjie Yang
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology of Jiangxi Province, Jiangxi Normal University, Nanchang, P.R. China
| | - Fei Xiong
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, P.R. China
- National Research Center for Carbohydrate Synthesis and Key Laboratory of Chemical Biology of Jiangxi Province, Jiangxi Normal University, Nanchang, P.R. China
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111
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Vignesh A, Shalini C, Dharmaraj N, Kaminsky W, Karvembu R. Delineating the Role of Substituents on the Coordination Behavior of Aroylhydrazone Ligands in Pd
II
Complexes and their Influence on Suzuki–Miyaura Coupling in Aqueous Media. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900781] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Arumugam Vignesh
- Department of Chemistry National Institute of Technology 620015 Tiruchirapalli – India
- Inorganic & Nanomaterials Research Laboratory Department of Chemistry Bharathiar University Coimbatore – 641 046 India
| | - Chinnuswamy Shalini
- Inorganic & Nanomaterials Research Laboratory Department of Chemistry Bharathiar University Coimbatore – 641 046 India
| | - Nallasamy Dharmaraj
- Inorganic & Nanomaterials Research Laboratory Department of Chemistry Bharathiar University Coimbatore – 641 046 India
| | - Werner Kaminsky
- Department of Chemistry Department of Chemistry University of Washington 98195 Seattle Washington USA
| | - Ramasamy Karvembu
- Department of Chemistry National Institute of Technology 620015 Tiruchirapalli – India
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112
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Sudharsan M, Thirumoorthy K, Nethaji M, Suresh D. Synthesis, Characterization and Theoretical Investigation on Thiazoline‐Derived Palladium‐Complexes‐Catalyzed Denitrogenative Cross‐Coupling of Aryl Halides with Arylhydrazines. ChemistrySelect 2019. [DOI: 10.1002/slct.201902137] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Murugesan Sudharsan
- Department of ChemistrySchool of Chemical and BiotechnologySASTRA Deemed University, Thanjavur, Tamil Nadu 613 401 India
| | - Krishnan Thirumoorthy
- Department of ChemistrySchool of Advanced SciencesVellore Institute of Technology University, Vellore Tamil Nadu 632 014 India
| | - Munirathinam Nethaji
- Department of Inorganic and Physical ChemistryIndian Institute of Science, Bangalore Tamilnadu 400 001 India
| | - Devarajan Suresh
- Department of ChemistrySchool of Chemical and BiotechnologySASTRA Deemed University, Thanjavur, Tamil Nadu 613 401 India
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113
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Ye D, Liu Z, Chen H, Sessler JL, Lei C. Cesium Carbonate Catalyzed Esterification of N-Benzyl- N-Boc-amides under Ambient Conditions. Org Lett 2019; 21:6888-6892. [PMID: 31407912 DOI: 10.1021/acs.orglett.9b02513] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report a general activated amide to ester transformation catalyzed by Cs2CO3. Using this approach, esterification proceeds under relatively mild conditions and without the need for a transition metal catalyst. This method exhibits broad substrate scope and represents a practical alternative to existing esterification strategies. The synthetic utility of this protocol is demonstrated via the facile synthesis of crown ether derivatives and the late-stage modification of a representative natural product and several sugars in reasonable yields.
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Affiliation(s)
- Danfeng Ye
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.,Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Zhiyuan Liu
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Hao Chen
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Jonathan L Sessler
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China.,Department of Chemistry, the University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Chuanhu Lei
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
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114
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Gaikwad VV, Mane PA, Dey S, Bhanage BM. Dppf‐Ligated Palladium Complex as an Efficient Catalyst for the Synthesis of Biaryl Ketones Using Co
2
(CO)
8
as a C1 Source with High TON and TOF. ChemistrySelect 2019. [DOI: 10.1002/slct.201901930] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Vinayak V. Gaikwad
- Department of Chemistry, Institute of Chemical TechnologyN.Parekh Marg, Matunga, Mumbai 400 019 Maharashtra India)
| | - Pravin A. Mane
- Chemistry Division, Bhabha Atomic Research Centre Mumbai 400 085 India
| | - Sandip Dey
- Chemistry Division, Bhabha Atomic Research Centre Mumbai 400 085 India
- Homi Bhabha National InstituteTraining School Complex Mumbai 400 094 India
| | - Bhalchandra M. Bhanage
- Department of Chemistry, Institute of Chemical TechnologyN.Parekh Marg, Matunga, Mumbai 400 019 Maharashtra India)
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115
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Luo Z, Xiong L, Liu T, Zhang Y, Lu S, Chen Y, Guo W, Zhu Y, Zeng Z. Palladium-Catalyzed Decarbonylative Suzuki–Miyaura Coupling of Amides To Achieve Biaryls via C–N Bond Cleavage. J Org Chem 2019; 84:10559-10568. [DOI: 10.1021/acs.joc.9b01103] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zhongfeng Luo
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Li Xiong
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Tingting Liu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Yuqi Zhang
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Siqi Lu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Yuwen Chen
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Weijie Guo
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Yulin Zhu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
| | - Zhuo Zeng
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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116
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Dardir AH, Hazari N, Miller SJ, Shugrue CR. Palladium-Catalyzed Suzuki-Miyaura Reactions of Aspartic Acid Derived Phenyl Esters. Org Lett 2019; 21:5762-5766. [PMID: 31290674 DOI: 10.1021/acs.orglett.9b02214] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Transition-metal-catalyzed transformations of amino acids and peptides could provide a powerful method for their site-selective modification. Here, we report non-decarbonylative Pd-catalyzed Suzuki-Miyaura reactions of phenyl ester derivatives of aspartic acid to form aryl-amino ketones. These products are potentially important in the synthesis of pharmaceuticals, and our methodology represents a new route to access molecules of this type.
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Affiliation(s)
- Amira H Dardir
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
| | - Nilay Hazari
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
| | - Scott J Miller
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
| | - Christopher R Shugrue
- The Department of Chemistry , Yale University , P.O. Box 208107, New Haven , Connecticut 06520 , United States
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117
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Li Y, Wu H, Zeng Z. Palladium-Catalyzed Aerobic Oxidative Coupling of Amides with Arylboronic Acids by Cooperative Catalysis. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900531] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yue Li
- College of Chemistry & Environment; South China Normal University; 510006 Guangzhou Guangdong China
| | - Hongxiang Wu
- College of Chemistry & Environment; South China Normal University; 510006 Guangzhou Guangdong China
| | - Zhuo Zeng
- College of Chemistry & Environment; South China Normal University; 510006 Guangzhou Guangdong China
- Shanghai Institute of Organic Chemistry; Chinese Academy of Science; 354 Lingling Road 200032 Shanghai China
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118
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Ogiwara Y, Iino Y, Sakai N. Catalytic C-H/C-F Coupling of Azoles and Acyl Fluorides. Chemistry 2019; 25:6513-6516. [PMID: 30941769 DOI: 10.1002/chem.201901219] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 03/31/2019] [Indexed: 01/14/2023]
Abstract
A method for the palladium/copper-catalyzed direct acylation of azoles with acyl fluorides is described. This study reports the first examples of acyl fluorides being used as acylation reagents in transition-metal-catalyzed aromatic C-H bond functionalization reactions. Depending on the reaction temperature, decarbonylative coupling may also occur. Mechanistic studies suggest that the cleavage of the aromatic C-H bond, promoted by a copper-phosphine species, is not the rate-limiting step of this acylation.
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Affiliation(s)
- Yohei Ogiwara
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 2, 78-8510, Japan
| | - Yurika Iino
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 2, 78-8510, Japan
| | - Norio Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 2, 78-8510, Japan
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119
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Zhou T, Li G, Nolan SP, Szostak M. [Pd(NHC)(acac)Cl]: Well-Defined, Air-Stable, and Readily Available Precatalysts for Suzuki and Buchwald-Hartwig Cross-coupling (Transamidation) of Amides and Esters by N-C/O-C Activation. Org Lett 2019; 21:3304-3309. [PMID: 30990697 DOI: 10.1021/acs.orglett.9b01053] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general class of well-defined, air-stable, and readily available Pd(II)-NHC precatalysts (NHC = N-heterocyclic carbene) for Suzuki and Buchwald-Hartwig cross-coupling of amides (transamidation) and esters by selective N-C/O-C cleavage is reported. Since these precatalysts are highly active and the easiest to synthesize, the study clearly suggests that [Pd(NHC)(acac)Cl] should be routinely included during the development of new cross-coupling methods. An assay for in situ screening of NHC salts in this cross-coupling manifold is presented.
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Affiliation(s)
- Tongliang Zhou
- Department of Chemistry , Rutgers University , 73 Warren Street , Newark , New Jersey 07102 , United States
| | - Guangchen Li
- Department of Chemistry , Rutgers University , 73 Warren Street , Newark , New Jersey 07102 , United States
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry , Ghent University , Krijgslaan 281 , 9000 Ghent , Belgium
| | - Michal Szostak
- College of Chemistry and Chemical Engineering and Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education , Shaanxi University of Science and Technology , Xi'an 710021 , China.,Department of Chemistry , Rutgers University , 73 Warren Street , Newark , New Jersey 07102 , United States
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120
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Blanchard N, Bizet V. Säurefluoride in der Übergangsmetallkatalyse: Balance von Stabilität und Reaktivität. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900591] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nicolas Blanchard
- Université de Haute-AlsaceUniversité de StrasbourgCNRS, LIMA, UMR 7042 68000 Mulhouse Frankreich
| | - Vincent Bizet
- Université de Haute-AlsaceUniversité de StrasbourgCNRS, LIMA, UMR 7042 68000 Mulhouse Frankreich
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121
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Blanchard N, Bizet V. Acid Fluorides in Transition-Metal Catalysis: A Good Balance between Stability and Reactivity. Angew Chem Int Ed Engl 2019; 58:6814-6817. [PMID: 30964591 DOI: 10.1002/anie.201900591] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/08/2019] [Indexed: 12/22/2022]
Abstract
Several recent reports outlined the singular reactivity of acid fluorides as excellent electrophiles in transition-metal catalysis. These species undergo oxidative addition of the metal into the C-F bond; then, retention or release of the CO moiety can occur and be controlled by tuning the catalytic system and the reaction parameters. Acid fluorides, which can be derived from carboxylic acids, show good stability and high reactivity in a wide range of possible functionalizations with nucleophiles. Their use provides an interesting alternative to that of the parent carboxylic acid derivatives (acid chlorides, esters, amides, acids, or aldehydes).
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Affiliation(s)
- Nicolas Blanchard
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000, Mulhouse, France
| | - Vincent Bizet
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000, Mulhouse, France
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Shi S, Szostak M. Decarbonylative Borylation of Amides by Palladium Catalysis. ACS OMEGA 2019; 4:4901-4907. [PMID: 31459674 PMCID: PMC6647946 DOI: 10.1021/acsomega.9b00081] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/18/2019] [Indexed: 06/10/2023]
Abstract
The development of transition-metal-catalyzed borylation reactions is of significant importance for the fields of organic synthesis and medicinal chemistry because of the versatility of organoboron functional groups. Herein, we report the direct decarbonylative borylation of amides by highly selective carbon-nitrogen bond cleavage by palladium catalysis. The approach capitalizes on the ground-state destabilization of the amide bond in N-acyl glutarimides to achieve Pd-catalyzed insertion into the amide N-C bond and decarbonylation (deamidation). Mechanistic studies and the utility of this methodology in orthogonal sequential cross-couplings of robust, bench-stable amides are reported.
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