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Castiñeiras A, García-Santos I. Palladium(II) and Platinum(II) Complexes Bearing ONS-Type Pincer Ligands: Synthesis, Characterization and Catalytic Investigations. Molecules 2024; 29:3425. [PMID: 39065003 PMCID: PMC11280083 DOI: 10.3390/molecules29143425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Revised: 07/19/2024] [Accepted: 07/20/2024] [Indexed: 07/28/2024] Open
Abstract
This work describes the synthesis of eight new Pd(II) and Pt(II) complexes with the general formula [M(TSC)Cl], where TSC represents the 4N-monosubstituted thiosemicarbazone derived from 2-acetylpyridine N-oxide with the substituents CH3 (H4MLO), C2H5 (H4ELO), phenyl (H4PLO) and (CH3)2 (H4DMLO). These complexes have been characterized by elemental analysis, molar conductivity, IR spectroscopy, 1H, 13C, 195Pt and ESI-MS. The complexes exhibit a square planar geometry around the metallic center coordinated by a thiosemicarbazone molecule acting as a donor ONS-type pincer ligand and by a chloride, as confirmed by the molecular structures of the complexes, [Pd(4ELO)Cl] (3) and [Pd(4PLO)Cl] (5), determined by single-crystal X-ray diffraction. The 195Pt NMR spectra of the complexes of formulae [Pt(4PLO)Cl] (6) and [Pt(4DMLO)Cl] (8) in DMSO show a single signal at -2420.4 ppm, confirming the absence of solvolysis products. Complexes 3 and 5 have been tested as catalysts in the Suzuki-Miyaura cross-coupling reactions of aryl bromides with phenylboronic acid, with yields of between 50 and 90.
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Affiliation(s)
- Alfonso Castiñeiras
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain;
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2
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Panda S, Patra S, Acharya SS, Phaomei G, Parida BB. Recyclable LaF 3·Pd nanocatalyst in Suzuki coupling: green synthesis of biaryls from haloarenes and phenylboronic acids. RSC Adv 2024; 14:21269-21276. [PMID: 38974224 PMCID: PMC11224950 DOI: 10.1039/d4ra00686k] [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: 01/26/2024] [Accepted: 06/13/2024] [Indexed: 07/09/2024] Open
Abstract
Herein we prepared the novel LaF3·Pd nanocatalyst characterized by XRD and TEM analysis. The nanocatalyst was applied in Suzuki coupling reaction for the synthesis of biaryls in aqueous medium from readily available aryl halides (bromides and iodides) and substituted phenylboronic acids in the presence of K2CO3 as the base at 70 °C. The present method is capable of giving the C-C coupled product in good to excellent yields (up to 97%). The reactions were conducted under green conditions in aqueous medium and the nanocatalyst used in this study was recyclable. The recyclability and reusability of the catalyst was checked for seven consecutive cycles without significant loss in reactivity.
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Affiliation(s)
- Smitabala Panda
- Department of Chemistry, Berhampur University Bhanja Bihar-760007 Odisha India
| | - Sagarika Patra
- Department of Chemistry, Berhampur University Bhanja Bihar-760007 Odisha India
| | | | - Ganngam Phaomei
- Department of Chemistry, Berhampur University Bhanja Bihar-760007 Odisha India
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3
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Govada GV, Pal S, Panjacharam P, Bhatt HS, Kumar S, Lin CC, Wang SK, Reddy SR. Pd(II)-Catalyzed Site-Selective Cross Coupling Reaction: Synthesis of Highly Fluorescent Aryl-Formyl-Chromenes and its Iminoantipyrine Analogues as Selective AChE Inhibitors. Chem Biodivers 2024:e202400719. [PMID: 38958461 DOI: 10.1002/cbdv.202400719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 05/21/2024] [Indexed: 07/04/2024]
Abstract
A versatile and efficient chemo selective synthesis of 4-aryl-3-formyl-2H-chromenes (AFC) was undertaken using Pd-catalyzed cross-coupling conditions. The key oxidative transmetalation was successfully applied to a significant range of substitutions on the chromene moiety and aryl ring in Ar(BOH)3, accommodating both electron-rich and electron-deficient groups. These π-extended scaffolds exhibited green-yellow fluorescence with a large Stokes shift and high quantum yield. Measurement of photophysical properties revealed that the compound with methoxy substitution in the chromene ring, 3t, caused a significant bathochromic shift. The AFCs obtained from this method can be transformed into biologically active 4-aryl-3-iminoantipyrine-2H-chromenes (AAC) through functionalization of the formyl chromenes. The AFCs and AACs with methoxy substitutions (3t and 4e) were docked against AChE inhibition, and compound 4e had the lowest binding energy of -11.20 kcal/mol. DFT calculations performed on representative compounds revealed that compound 4e is more reactive than 3t, which is in accordance with the docking studies.
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Affiliation(s)
- Grace Victoria Govada
- Advanced Catalysis laboratory, Vellore Institute of Technology (VIT), Vellore, 632014, India
| | - Sanjivani Pal
- Advanced Catalysis laboratory, Vellore Institute of Technology (VIT), Vellore, 632014, India
| | - Paranimuthu Panjacharam
- Advanced Catalysis laboratory, Vellore Institute of Technology (VIT), Vellore, 632014, India
| | - Harshil Samir Bhatt
- Centre for Bio Separation Technology, Vellore Institute of Technology (VIT), Vellore, 632014, India
| | - Sanjit Kumar
- Department of Biotechnology, School of Interdisciplinary Education and Research, Guru Ghasidas Vishwavidyalaya (Central university), Bilaspur, India
| | - Chun-Cheng Lin
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300, Taiwan
| | - Sheng-Kai Wang
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300, Taiwan
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4
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Shen M, Niu C, Wang X, Huang JB, Zhao Z, Ni SF, Rong ZQ. Regio- and Enantioselective Hydromethylation of 3-Pyrrolines and Glycals Enabled by Cobalt Catalysis. JACS AU 2024; 4:2312-2322. [PMID: 38938800 PMCID: PMC11200246 DOI: 10.1021/jacsau.4c00275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/25/2024] [Accepted: 05/29/2024] [Indexed: 06/29/2024]
Abstract
Enantioenriched 3-methylpyrrolidine, with its unique chiral nitrogen-containing core skeleton, exists widely in various functional molecules, including natural products, bioactive compounds, and pharmaceuticals. Traditional methods for synthesizing these valuable methyl-substituted heterocycles often involve enzymatic processes or complex procedures with chiral auxiliaries, limiting the substrate scope and efficiency. Efficient catalytic methylation, especially in an enantioselective manner, has been a long-standing challenge in chemical synthesis. Herein, we present a novel approach for the remote and stereoselective installation of a methyl group onto N-heterocycles, leveraging a CoH-catalyzed asymmetric hydromethylation strategy. By effectively combining a commercial cobalt precursor with a modified bisoxazoline (BOX) ligand, a variety of easily accessible 3-pyrrolines can be converted to valuable enantiopure 3-(isotopic labeling)methylpyrrolidine compounds with outstanding enantioselectivity. This efficient protocol streamlines the two-step synthesis of enantioenriched 3-methylpyrrolidine, which previously required up to five or six steps under harsh conditions or expensive starting materials.
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Affiliation(s)
- Mengyang Shen
- Frontiers
Science Center for Flexible Electronics (FSCFE), Shaanxi Institute
of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical
Materials and Engineering (SIBME), Northwestern
Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
| | - Caoyue Niu
- Frontiers
Science Center for Flexible Electronics (FSCFE), Shaanxi Institute
of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical
Materials and Engineering (SIBME), Northwestern
Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
| | - Xuchao Wang
- Frontiers
Science Center for Flexible Electronics (FSCFE), Shaanxi Institute
of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical
Materials and Engineering (SIBME), Northwestern
Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
| | - Jia-Bo Huang
- Department
of Chemistry and Key Laboratory for Preparation and Application of
Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong 515063, China
| | - Zhen Zhao
- Frontiers
Science Center for Flexible Electronics (FSCFE), Shaanxi Institute
of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical
Materials and Engineering (SIBME), Northwestern
Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
| | - Shao-Fei Ni
- Department
of Chemistry and Key Laboratory for Preparation and Application of
Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong 515063, China
| | - Zi-Qiang Rong
- Frontiers
Science Center for Flexible Electronics (FSCFE), Shaanxi Institute
of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical
Materials and Engineering (SIBME), Northwestern
Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
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5
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Xiong H, Lin Q, Lu Y, Zheng D, Li Y, Wang S, Xie W, Li C, Zhang X, Lin Y, Wang ZX, Shi Q, Marks TJ, Huang H. General room-temperature Suzuki-Miyaura polymerization for organic electronics. NATURE MATERIALS 2024; 23:695-702. [PMID: 38287128 DOI: 10.1038/s41563-023-01794-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 12/21/2023] [Indexed: 01/31/2024]
Abstract
π-Conjugated polymers (CPs) have broad applications in high-performance optoelectronics, energy storage, sensors and biomedicine. However, developing green and efficient methods to precisely synthesize alternating CP structures on a large scale remains challenging and critical for their industrialization. Here a room-temperature, scalable and homogeneous Suzuki-Miyaura-type polymerization reaction is developed with broad generality validated for 24 CPs including donor-donor, donor-acceptor and acceptor-acceptor connectivities, yielding device-quality polymers with high molecular masses. Furthermore, the polymerization protocol significantly reduces homocoupling structural defects, yielding more structurally regular and higher-performance electronic materials and optoelectronic devices than conventional thermally activated polymerizations. Experimental and theoretical studies reveal that a borate transmetalation process plays a key role in suppressing protodeboronation, which is critical for large-scale structural regularity. Thus, these results provide a general polymerization tool for the scalable production of device-quality CPs with alternating structural regularity.
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Affiliation(s)
- Haigen Xiong
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Qijie Lin
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Yu Lu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Ding Zheng
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL, USA
| | - Yawen Li
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Song Wang
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Wenbin Xie
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Congqi Li
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Xin Zhang
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Yuze Lin
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Qinqin Shi
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
| | - Tobin J Marks
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL, USA.
| | - Hui Huang
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
- CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
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6
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Tracy W, Davies GHM, Grant LN, Ganley JM, Moreno J, Cherney EC, Davies HML. Anhydrous and Stereoretentive Fluoride-Enhanced Suzuki-Miyaura Coupling of Immunomodulatory Imide Drug Derivatives. J Org Chem 2024; 89:4595-4606. [PMID: 38452367 PMCID: PMC11002932 DOI: 10.1021/acs.joc.3c02873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/12/2024] [Accepted: 02/17/2024] [Indexed: 03/09/2024]
Abstract
Immunomodulatory imide drugs form the core of many pharmaceutically relevant structures, but Csp2-Csp2 bond formation via metal-catalyzed cross coupling is difficult due to the sensitivity of the glutarimide ring ubiquitous in these structures. We report that replacement of the traditional alkali base with a fluoride source enhances a previously challenging Suzuki-Miyaura coupling on glutarimide-containing compounds with trifluoroborates. These enabling conditions are reactive enough to generate these derivatives in high yields but mild enough to preserve both the glutarimide and its sensitive stereocenter. Experimental and computational data suggest a mechanistically distinct process of π-coordination of the trifluoroborate enabled by these conditions.
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Affiliation(s)
- William
F. Tracy
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Geraint H. M. Davies
- Small
Molecule Drug Discovery, Bristol Myers Squibb, Cambridge, Massachusetts 02140, United States
| | - Lauren N. Grant
- Chemical
Process Development, Bristol Myers Squibb, New Brunswick, New Jersey 08903, United States
| | - Jacob M. Ganley
- Chemical
Process Development, Bristol Myers Squibb, New Brunswick, New Jersey 08903, United States
| | - Jesus Moreno
- Small
Molecule Drug Discovery, Bristol Myers Squibb, San Diego, California 92121, United States
| | - Emily C. Cherney
- Small
Molecule Drug Discovery, Bristol Myers Squibb, Princeton, New Jersey 08543, United States
| | - Huw M. L. Davies
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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7
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Hassan A, Baghel AS, Kumar A, Das N. Palladium(II)-immobilized Triptycene based Hypercrosslinked Polymers: An Efficient, Green, and Reusable Heterogenous Catalyst for Suzuki-Miyaura Cross-coupling Reaction. Chem Asian J 2024; 19:e202300778. [PMID: 37950487 DOI: 10.1002/asia.202300778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/06/2023] [Accepted: 11/10/2023] [Indexed: 11/12/2023]
Abstract
The Suzuki-Miyaura cross-coupling (SMCC) involves the coupling of organohalides and organoboron molecules in the presence of Pd(II)-based catalysts. Often SMCC reactions employ homogenous catalysts. However, such homogenous SMCC reactions are associated with certain limitations which has motivated design of effective and sustainable Pd(II)-based heterogeneous catalytic systems. Herein, we report a systematic development of a Pd(II)-immobilized and triptycene based ionic hyper crosslinked polymer (Pd@TP-iHCP) and explored its application as a heterogeneous catalyst for SMCC reaction. Pd@TP-iHCP has ample N-heterocyclic carbene (NHC) pendants that anchor Pd(II) centres on the polymeric matrix. Pd@TP-iHCP was characterized satisfactorily using FT-IR, 13 C CP-MAS NMR, BET surface area analysis, SEM, EDX and HRTEM. The performance of Pd@TP-iHCP as a heterogeneous catalyst for SMCC reactions was explored using various combinations of aryl boronic acids and aryl halides. Experimental results show that Pd@TP-iHCP is associated with a moderately high surface area. It is an efficient catalyst for SMCC (in aqueous media) with a modest loading of 0.8 mol % Pd(II)-catalyst since high yields of the expected products were obtained in shorter time intervals. Pd@TP-iHCP also features excellent stability and catalyst recyclability since it could be re-used for several cycles without any significant decrease in catalytic efficiency.
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Affiliation(s)
- Atikur Hassan
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
| | - Akanksha Singh Baghel
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
| | - Neeladri Das
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
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8
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Niwa T, Takimoto T, Sakata Y, Hosoya T. Palladium-Catalyzed ipso-Borylation of Aryl Halides Promoted by Lewis Acid-Mediated Electrophilic Activation of Aryl(halo)palladium(II) Complex. Org Lett 2023; 25:8173-8177. [PMID: 37938808 DOI: 10.1021/acs.orglett.3c03531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Palladium-catalyzed ipso-borylation of aryl halides, well-known as Miyaura borylation, is one of the reliable synthetic methods for organoborons. This reaction involves base-mediated nucleophilic activation of diboron that enables transmetalation of an aryl(halo)palladium(II) intermediate with a diboron. As an alternative, herein, we have established Lewis acid-mediated conditions for borylating (pseudo)haloarenes that require no external base. The electrophilic activation of the aryl(halo)palladium(II) intermediate via dehalogenation with Lewis acidic zinc complexes promotes the borylation.
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Affiliation(s)
- Takashi Niwa
- Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tadashi Takimoto
- Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Yuki Sakata
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Takamitsu Hosoya
- Laboratory for Chemical Biology, RIKEN Center for Biosystems Dynamics Research (BDR), 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
- Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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9
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Gay BL, Wang YN, Bhatt S, Tarasewicz A, Cooke DJ, Milem EG, Zhang B, Gary JB, Neidig ML, Hull KL. Palladium and Iron Cocatalyzed Aerobic Alkene Aminoboration. J Am Chem Soc 2023; 145:18939-18947. [PMID: 37584107 PMCID: PMC10772865 DOI: 10.1021/jacs.3c05790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
Aminoboration of simple alkenes with nitrogen nucleophiles remains an unsolved problem in synthetic chemistry; this transformation can be catalyzed by palladium via aminopalladation followed by transmetalation with a diboron reagent. However, this catalytic process faces inherent challenges with instability of the alkylpalladium(II) intermediate toward β-hydride elimination. Herein, we report a palladium/iron cocatalyzed aminoboration, which enables this transformation. We demonstrate these conditions on a variety of alkenes and norbornenes with an array of common nitrogen nucleophiles. In the developed strategy, the iron cocatalyst is crucial to achieving the desired reactivity by serving as a halophilic Lewis acid to release the transmetalation-active cationic alkylpalladium intermediate. Furthermore, it serves as a redox shuttle in the regeneration of the Pd(II) catalyst by reactivation of nanoparticulate palladium.
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Affiliation(s)
- Brittany L. Gay
- University of Texas at Austin, 100 E. 24 Street, Austin, TX 78712 United States of America
| | - Ya-Nong Wang
- University of Texas at Austin, 100 E. 24 Street, Austin, TX 78712 United States of America
| | - Shreeja Bhatt
- University of Texas at Austin, 100 E. 24 Street, Austin, TX 78712 United States of America
| | - Anika Tarasewicz
- University of Texas at Austin, 100 E. 24 Street, Austin, TX 78712 United States of America
| | - Daniel J. Cooke
- University of Texas at Austin, 100 E. 24 Street, Austin, TX 78712 United States of America
| | - E. Grace Milem
- University of Texas at Austin, 100 E. 24 Street, Austin, TX 78712 United States of America
- Stephen F. Austin State University, P.O. Box 13006, SFA Station, Nacogdoches, TX 75962, United States of America
| | - Bufan Zhang
- University of Rochester, 120 Trustee Road, Rochester, NY 14627, United States of America
| | - J. Brannon Gary
- Stephen F. Austin State University, P.O. Box 13006, SFA Station, Nacogdoches, TX 75962, United States of America
| | - Michael L. Neidig
- University of Rochester, 120 Trustee Road, Rochester, NY 14627, United States of America
- University of Oxford, S Parks Rd, Oxford OX1 3QR, United Kingdom
| | - Kami L. Hull
- University of Texas at Austin, 100 E. 24 Street, Austin, TX 78712 United States of America
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10
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Mandal UC, Chatterjee A, Chattopadhyay T, Mukherjee A, Ghosh R. Synthesis and structural characterization of unsymmetrical Schiff base 2-(1-(2-aminophenylimino)ethyl)phenol (LH3) and its Pd(II) complex [Pd3(LH)3]: catalysis of Suzuki–Miyaura cross-coupling reaction. J CHEM SCI 2023. [DOI: 10.1007/s12039-023-02142-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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11
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Roh B, Farah AO, Kim B, Feoktistova T, Moeller F, Kim KD, Cheong PHY, Lee HG. Stereospecific Acylative Suzuki–Miyaura Cross-Coupling: General Access to Optically Active α-Aryl Carbonyl Compounds. J Am Chem Soc 2023; 145:7075-7083. [PMID: 37016901 DOI: 10.1021/jacs.3c00637] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
A novel strategy for the stereospecific Pd-catalyzed acylative cross-coupling of enantiomerically enriched alkylboron compounds has been developed. The protocol features an extremely high level of enantiospecificity to allow facile access to synthetically challenging and valuable chiral ketones and carboxylic acid derivatives. The use of a sterically encumbered and electron-rich phosphine ligand proved to be crucial for the success of the reaction. Furthermore, on the basis of experimental and computational studies, a unique mechanism for the transmetalation, assisted by the noncovalent interactions of the C(sp3)-based organoboron reagent, has been identified.
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Affiliation(s)
- Byeongdo Roh
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Abdikani Omar Farah
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331-2145, United States
| | - Beomsu Kim
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Taisiia Feoktistova
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331-2145, United States
| | - Finn Moeller
- Department of Chemistry, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
| | - Kyeong Do Kim
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331-2145, United States
| | - Hong Geun Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
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12
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Shukla F, Patel M, Gulamnabi Q, Thakore S. Palladium nanoparticles-confined pore-engineered urethane-linked thiol-functionalized covalent organic frameworks: a high-performance catalyst for the Suzuki Miyaura cross-coupling reaction. Dalton Trans 2023; 52:2518-2532. [PMID: 36734618 DOI: 10.1039/d2dt04057c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Covalent organic frameworks (COFs) are potential templates for the synthesis of nanomaterials owing to the versatility of their structure. Most of the reported COFs comprise imine linkages. Herein, we report for the first time the synthesis of a urethane-linked COF (UCOF) using monoformylphloroglucinol and 1,4-phenylene diisocyanate as monomers. Furthermore, the UCOF was functionalized with cysteamine to introduce free dangling thiol groups into the cavity. The latter played a critical role in fixing the active metal efficiently and facilitating the confined growth of small metal nanoparticles (∼4-6 nm) with a high surface area leading to a pore-engineered heterogeneous Pd catalyst (PdNPs@UCOF-SH). The COF and Pd catalyst were characterized using various analytical techniques such as CP-MAS NMR, FTIR, PXRD, BET, FEG-SEM, HRTEM, XPS, TGA, and ICP-AES. The as-prepared UCOF-SH-supported Pd nanoparticles showed excellent catalytic activity in the Suzuki Miyaura cross-coupling reaction under mild conditions with low catalyst loading and eco-friendly solvents. The scope was extended to various aryl boronic acids and aryl halides (I, Br, and Cl). The halo-substituted and non-halo biaryl derivatives were obtained in good to excellent yields, within a shorter reaction time, avoiding the homocoupling of aryl boronic acid. The pore-engineered COF-derived catalyst is selective and easily recycled up to 10 runs without significant loss of catalytic activity. This reveals the robust nature of the PdNPs@UCOF-SH catalyst and the sustainability of the process which opens a new frontier for several catalytic applications.
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Affiliation(s)
- Falguni Shukla
- Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, 390002, India.
| | - Miraj Patel
- Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, 390002, India.
| | - Qureshi Gulamnabi
- Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, 390002, India.
| | - Sonal Thakore
- Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, 390002, India.
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13
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Nakahara H, Yamaguchi J. Aryl Dance Reaction of Arylbenzoheteroles. Org Lett 2022; 24:8083-8087. [PMID: 36286610 DOI: 10.1021/acs.orglett.2c03442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a 1,2-migration (aryl dance reaction) of the aryl group on heteroles. AlCl3 can efficiently convert C3-arylheteroles to C2-arylheteroles. Depending on the electron density of the substrate, conversion from C2- to C3-arylheteroles was also possible with catalytic Zn(OTf)2. A one-pot aryl dance/acylation or bromination and arylation/aryl dance cascade was also demonstrated.
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Affiliation(s)
- Hikaru Nakahara
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
| | - Junichiro Yamaguchi
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
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14
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Chen D, Wei L, Yu Y, Zhao L, Sun Q, Han C, Lu J, Nie H, Shao LX, Qian J, Yang Z. Size-Selective Suzuki-Miyaura Coupling Reaction over Ultrafine Pd Nanocatalysts in a Water-Stable Indium-Organic Framework. Inorg Chem 2022; 61:15320-15324. [PMID: 36137280 DOI: 10.1021/acs.inorgchem.2c02877] [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
Metal nanoparticles stabilized by crystalline metal-organic frameworks (MOFs) are highly promising for green heterogeneous catalysis. In this work, in situ formed ultrafine Pd nanocatalysts with an average size of 3.14 nm have been successfully immobilized into the mesopores or defects of a water-stable indium-based MOF by the double-solvent method and subsequent reduction. Significantly, the obtained Pd@InOF-1 displays an obvious and satisfactory size-selective effect in the Suzuki-Miyaura coupling reaction between arylboronic acids and aryl bromides. On the basis of the synergistic effect, microporous InOF-1 nanorods afford a confined space for improving the selectivity of target products while Pd nanoparticles endow abundant active sites for catalysis. Herein, choosing the smallest size reactant with only one benzene ring gives the highest isolated yield of 90%, and if the size is larger, the yield is obviously reduced or even the target product could not be collected. Looking forward, this demonstrated study not only assembles a well-designed Pd@MOF composite with unique micro-nanostructures but also delivers an impressive option for cross-coupling reaction, which has implications for the further development of MOF hybrids for sustainable applications.
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Affiliation(s)
- Dandan Chen
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Linsha Wei
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Yihan Yu
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Lei Zhao
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Qiuhong Sun
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Cheng Han
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Jianmei Lu
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Huagui Nie
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Li-Xiong Shao
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Jinjie Qian
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
| | - Zhi Yang
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P. R. China
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15
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Oka N, Yamada T, Sajiki H, Akai S, Ikawa T. Aryl Boronic Esters Are Stable on Silica Gel and Reactive under Suzuki-Miyaura Coupling Conditions. Org Lett 2022; 24:3510-3514. [PMID: 35500272 DOI: 10.1021/acs.orglett.2c01174] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A wide range of aryl boronic 1,1,2,2-tetraethylethylene glycol esters [ArB(Epin)s] were readily synthesized. Purifying aryl boronic esters by conventional silica gel chromatography is generally challenging; however, these introduced derivatives are easily purified on silica gel and isolated in excellent yields. We subjected the purified ArB(Epin) to Suzuki-Miyaura couplings, which provided higher yields of the desired biaryl products than those obtained using the corresponding aryl boronic acids or pinacol esters.
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Affiliation(s)
- Naoki Oka
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tsuyoshi Yamada
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-Nishi, Gifu 501-1196, Japan
| | - Hironao Sajiki
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-Nishi, Gifu 501-1196, Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takashi Ikawa
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-Nishi, Gifu 501-1196, Japan
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