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Joshi OP, Thirumoorthi R, Pardasani RT, Ray S, Dash C. Palladium(ii) complexes bearing mesoionic carbene ligands: catalytic application in domino Sonogashira coupling/cyclization reactions for one-pot synthesis of benzofuran and indole derivatives. RSC Adv 2024; 14:27141-27152. [PMID: 39193272 PMCID: PMC11348387 DOI: 10.1039/d4ra03485f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Accepted: 08/08/2024] [Indexed: 08/29/2024] Open
Abstract
Bioactive heterocycles such as benzofuran and indole derivatives were synthesized from commercially available 2-iodoarenes and alkynes via domino Sonogashira coupling followed by cyclization reaction using well-defined palladium PEPPSI (Pyridine Enhanced Precatalyst Preparation Stabilization and Initiation) complexes (2a and 2b). These reactions tolerate a variety of 2-iodoarenes and diversely substituted terminal alkynes, resulting in the corresponding product in moderate to good yields in an open-air atmosphere. In particular, two palladium(ii) PEPPSI complexes 2a and 2b were synthesized in good yields from the reaction of corresponding 1,2,3-triazol-5-ylidene (MIC: mesoionic carbene), PdCl2, KI, and K2CO3 in pyridine at 110 °C and structurally characterized by various spectroscopic techniques including NMR spectroscopy, IR spectroscopy, HRMS and elemental analysis studies. Complex 2b is also characterized by X-ray crystallography.
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Affiliation(s)
- Om Prakash Joshi
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan Bandarsindri Ajmer 305817 Rajasthan India
| | - Ramalingam Thirumoorthi
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan Bandarsindri Ajmer 305817 Rajasthan India
| | - Ram T Pardasani
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan Bandarsindri Ajmer 305817 Rajasthan India
| | - Sriparna Ray
- Catalytic Applications Laboratory, Department of Chemistry, School of Basic Sciences, Faculty of Science, Manipal University Jaipur Dehmi Kalan Jaipur 303007 Rajasthan India
| | - Chandrakanta Dash
- Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan Bandarsindri Ajmer 305817 Rajasthan India
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Valerio L, Hakey BM, Leary DC, Stockdale E, Brennessel WW, Milsmann C, Matson EM. Synthesis and Characterization of Isostructural Th(IV) and U(IV) Pyridine Dipyrrolide Complexes. Inorg Chem 2024; 63:9610-9623. [PMID: 38377955 PMCID: PMC11134498 DOI: 10.1021/acs.inorgchem.3c04391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/24/2024] [Accepted: 01/24/2024] [Indexed: 02/22/2024]
Abstract
A series of pyridine dipyrrolide actinide(IV) complexes, (MesPDPPh)AnCl2(THF) and An(MesPDPPh)2 (An = U, Th, where (MesPDPPh) is the doubly deprotonated form of 2,6-bis(5-(2,4,6-trimethylphenyl)-3-phenyl-1H-pyrrol-2-yl)pyridine), have been prepared. Characterization of all four complexes has been performed through a combination of solid- and solution-state methods, including elemental analysis, single crystal X-ray diffraction, and electronic absorption and nuclear magnetic resonance spectroscopies. Collectively, these data confirm the formation of the mono- and bis-ligated species. Time-dependent density functional theory has been performed on all four An(IV) complexes, providing insight into the nature of electronic transitions that are observed in the electronic absorption spectra of these compounds. Room temperature, solution-state luminescence of the actinide complexes is presented. Both Th(IV) derivatives exhibit strong photoluminescence; in contrast, the U(IV) species are nonemissive.
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Affiliation(s)
- Leyla
R. Valerio
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Brett M. Hakey
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Dylan C. Leary
- C.
Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Erin Stockdale
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Carsten Milsmann
- C.
Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Ellen M. Matson
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
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3
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Dey J, Yadav S, Raj Lakshkar R, Singh A, Ray S, Dash C. Zinc‐
bis
(imino)pyridine Complexes as Catalysts for Azide‐Alkyne Cycloaddition in Water. ChemistrySelect 2022. [DOI: 10.1002/slct.202202239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jyotirmoy Dey
- Department of Chemistry School of Chemical Sciences and Pharmacy Central University of Rajasthan Bandarsindri Kishangarh Rajasthan India
| | - Seema Yadav
- Department of Chemistry School of Chemical Sciences and Pharmacy Central University of Rajasthan Bandarsindri Kishangarh Rajasthan India
| | - Ritu Raj Lakshkar
- Department of Chemistry School of Chemical Sciences and Pharmacy Central University of Rajasthan Bandarsindri Kishangarh Rajasthan India
| | - Ajeet Singh
- Department of Chemistry Indian Institute of Technology (IIT) Indore Khandwa Road 453552 Simrol Indore India
| | - Sriparna Ray
- Department of Chemistry Faculty of Science School of Basic Sciences Manipal University Jaipur 303007 Dehmi Kalan Jaipur Rajasthan India
| | - Chandrakanta Dash
- Department of Chemistry School of Chemical Sciences and Pharmacy Central University of Rajasthan Bandarsindri Kishangarh Rajasthan India
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Bhatt S, Meena N, Kumar M, Bhuvanesh N, Kumar A, Sharma AK, Joshi H. Design and Syntheses of Ruthenium ENE (E = S, Se) Pincer Complexes: A Versatile System for Catalytic and Biological Applications. Chem Asian J 2022; 17:e202200736. [PMID: 36065146 DOI: 10.1002/asia.202200736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/24/2022] [Indexed: 11/09/2022]
Abstract
This report describes synthesis of two ruthenium(II) ENE pincer complexes (E = S, C1 and E = Se, C2 ) by the reaction of bis(2-(phenylchalcogenyl)ethyl)amine ( L1 , L2 ) with RuCl 2 (PPh 3 ) 3 . The complexes were characterized with the help of 1 H and 13 C{ 1 H} NMR, FTIR, HRMS, cyclic voltammetry and elemental analysis techniques. The structure and bonding mode of ligand with ruthenium in C2 was established with the help of single crystal X-ray diffraction. The complex showed distorted octahedral geometry with two chlorine atoms trans to each other. The Ru-Se bond distances (Å) are 2.4564(3)-2.4630(3), Ru-N distance is 2.181(2), Ru-P distance is 2.2999(6), and Ru-Cl distances are 2.4078(6)-2.4314(6). The complexes showed good to excellent catalytic activity for the N -alkylation of 1,2-phenylenediamine with benzyl alcohol derivatives to synthesize 1,2-disubstituted benzimidazole derivatives. The complexes were also found to be efficient for aerobic oxidation of benzyl alcohols to corresponding aldehydes which are precursors to the bisimines generated in situ during the synthesis of 1,2-disubstituted benzimidazole derivatives. Complex C2 where selenium is coordinated with ruthenium was found to be more efficient as compared to sulfur coordinated ruthenium complex C1 . Since ruthenium complexes are getting increasing attention for developing new anticancer agents, the preliminary studies like binding behavior of both the complexes towards CT-DNA were studied by competitive binding with ethidium bromide (EthBr) using emission spectroscopy. In addition, the interactions of C1-C2 were also studied with bovine serum albumin (BSA) using steady state fluorescence quenching and synchronous fluorescence studies. A good stability of Ru(II) state was observed by cyclic voltammetric studies of C1-C2 . Overall these molecules are good examples of bio-organometallic systems for catalytic and biological applications.
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Affiliation(s)
| | - Neha Meena
- BITS Pilani: Birla Institute of Technology and Science, Chemistry, INDIA
| | - Mukesh Kumar
- Central University of Rajasthan, Chemistry, INDIA
| | - Nattamai Bhuvanesh
- Texas A&M University College Station: Texas A&M University, Chemistry, INDIA
| | - Anil Kumar
- BITS: Birla Institute of Technology & Science Pilani, Chemistry, INDIA
| | | | - Hemant Joshi
- Central University of Rajasthan, Ajmer, Chemistry, Department of Chemistry, Central University of Rajasthan, 305817, Bandarsindri, Ajmer, INDIA
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5
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Hakey BM, Leary DC, Lopez LM, Valerio LR, Brennessel WW, Milsmann C, Matson EM. Synthesis and Characterization of Pyridine Dipyrrolide Uranyl Complexes. Inorg Chem 2022; 61:6182-6192. [PMID: 35420825 PMCID: PMC9044449 DOI: 10.1021/acs.inorgchem.2c00348] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The first actinide complexes of the pyridine dipyrrolide (PDP) ligand class, (MesPDPPh)UO2(THF) and (Cl2PhPDPPh)UO2(THF), are reported as the UVI uranyl adducts of the bulky aryl substituted pincers (MesPDPPh)2- and (Cl2PhPDPPh)2- (derived from 2,6-bis(5-(2,4,6-trimethylphenyl)-3-phenyl-1H-pyrrol-2-yl)pyridine (H2MesPDPPh, Mes = 2,4,6-trimethylphenyl), and 2,6-bis(5-(2,6-dichlorophenyl)-3-phenyl-1H-pyrrol-2-yl)pyridine (H2Cl2PhPDPPh, Cl2Ph = 2,6-dichlorophenyl), respectively). Following the in situ deprotonation of the proligand with lithium hexamethyldisilazide to generate the corresponding dilithium salts (e.g., Li2ArPDPPh, Ar = Mes of Cl2Ph), salt metathesis with [UO2Cl2(THF)2]2 afforded both compounds in moderate yields. The characterization of each species has been undertaken by a combination of solid- and solution-state methods, including combustion analysis, infrared, electronic absorption, and NMR spectroscopies. In both complexes, single-crystal X-ray diffraction has revealed a distorted octahedral geometry in the solid state, enforced by the bite angle of the rigid meridional (ArPDPPh)2- pincer ligand. The electrochemical analysis of both compounds by cyclic voltammetry in tetrahydrofuran (THF) reveals rich redox profiles, including events assigned as UVI/UV redox couples. A time-dependent density functional theory study has been performed on (MesPDPPh)UO2(THF) and provides insight into the nature of the transitions that comprise its electronic absorption spectrum.
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Affiliation(s)
- Brett M Hakey
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Dylan C Leary
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Lauren M Lopez
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Leyla R Valerio
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Carsten Milsmann
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Ellen M Matson
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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6
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Wang S, Li HJ, Kuo TS, Shen LC, Liu HJ. Ambiphilic Nature of Dipyrrolylpyridine-Supported Divalent Germanium and Tin Compounds. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00494] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuo Wang
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001 Daxue Road, East District, Hsinchu City, Taiwan 30010
- Department of Applied Chemistry, National Chiao Tung University, 1001 Daxue Road, East District, Hsinchu City, Taiwan 30010
| | - Han-Jung Li
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Road,
Chutung, Hsinchu, Taiwan 31040
| | - Ting-Shen Kuo
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Li-Ching Shen
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001 Daxue Road, East District, Hsinchu City, Taiwan 30010
- Department of Applied Chemistry, National Chiao Tung University, 1001 Daxue Road, East District, Hsinchu City, Taiwan 30010
| | - Hsueh-Ju Liu
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001 Daxue Road, East District, Hsinchu City, Taiwan 30010
- Department of Applied Chemistry, National Chiao Tung University, 1001 Daxue Road, East District, Hsinchu City, Taiwan 30010
- Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
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Iodine-catalyzed tandem oxidative aromatization for the synthesis of meta-substituted alkoxybenzenes. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hakey BM, Leary DC, Rodriguez JG, Martinez JC, Vaughan NB, Darmon JM, Akhmedov NG, Petersen JL, Dolinar BS, Milsmann C. Effects of 2,6‐Dichlorophenyl Substituents on the Coordination Chemistry of Pyridine Dipyrrolide Iron Complexes. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Brett M. Hakey
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | - Dylan C. Leary
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | - Jose G. Rodriguez
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | - Jordan C. Martinez
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | - Nicholas B. Vaughan
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | | | - Novruz G. Akhmedov
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | - Jeffrey L. Petersen
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | - Brian S. Dolinar
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
| | - Carsten Milsmann
- C. Eugene Bennett Department of Chemistry West Virginia University Morgantown, West Virginia USA
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