1
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Cea-Olivares R, Ruiz-Hernández A, Said Razo-Hernández R, Tlahuext H, López-Cardoso M, Román-Bravo P, Vargas-Pineda G, Jancik V, Barroso-Flores J, Pineda-Urbina K, Pablo Mojica-Sánchez J. The importance of intramolecular hydrogen bonds for structural stabilization. [Triphenyl-tetrazolium] [tetraphenyldichalcogenoimidodiphosphinates], [Ph3CN4][Ph2P(X)NP(Y)Ph2]. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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2
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Kumar R, Singh VV, Jain N, Singh AK. Fast Transfer Hydrogenation(TH) in Aerobic Condition and Oxidation of Alcohols with
N
‐Methylmorpholine‐
N
‐oxide Catalyzed by Ru(II) Ligated with Chalcogenated Pyridines and PPh
3. ChemistrySelect 2020. [DOI: 10.1002/slct.202002031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rajan Kumar
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
| | - Ved Vati Singh
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
| | - Nidhi Jain
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
| | - Ajai K. Singh
- Department of ChemistryIndian Institute of Technology Delhi New Delhi 110016 India
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3
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Sharma AK, Joshi H, Bhaskar R, Singh AK. Complexes of (η 5-Cp*)Ir(iii) with 1-benzyl-3-phenylthio/selenomethyl-1,3-dihydrobenzoimidazole-2-thione/selenone: catalyst for oxidation and 1,2-substituted benzimidazole synthesis. Dalton Trans 2018; 46:2228-2237. [PMID: 28128378 DOI: 10.1039/c6dt04271f] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The treatment of 1-benzyl-3-phenylthio/selenomethyl-1,3-dihydrobenzoimidazole-2-thione/selenone [L1-L4] with [(η5-Cp*)IrCl(μ-Cl)]2 at 25 °C followed by NH4PF6 results in [(η5-Cp*)Ir(L)Cl][PF6] (1-4 for L = L1 to L4), authenticated with high-resolution mass spectrometry (HR-MS) and multi-nuclei nuclear magnetic resonance (NMR) imaging (1H, 13C{1H} and 77Se{1H}). The structures of 1-4, established with single-crystal X-ray diffraction, reveal a "piano-stool" geometry around the Ir. The Ir-thio/selenoether (Ir-S/Ir-Se) bond distances (Å) are 2.347(18)-2.355(4)/2.4663(12)-2.4663(13) and Ir-thione/selenone (Ir-S/Ir-Se) distances are 2.4146(19)-2.417(2)/2.5141(16)-2.5159(12). The reaction of 1,2-phenylenediamine with benzylic alcohols and furfuryl alcohol under mild and ambient conditions, catalyzed efficiently with complexes 1-4, generates bisimine in situ. Cyclization and rearrangement via 1,3-hydride shift triggered by its electrophilic activation with Ir(iii) species finally results in 1,2-disubstituted benzimidazole. The yield of the heterocycles in this one-pot synthesis is excellent to good. The aldehydes generated in situ by aerial oxidation of alcohols in the presence of 1-4 as catalysts are precursors to the bisimine as the protocols of this heterocycle synthesis carried out in the absence of 1,2-phenylenediamine give them in excellent-to-good yield. The oxidation of alcohols by hydrogen transfer to acetone was catalyzed efficiently with complexes 1-4 and resulted in aldehyde/ketone in excellent-to-good yield. Each catalytic process is marginally more efficient with 1 than its counterparts.
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Affiliation(s)
- Alpesh K Sharma
- Department of Chemistry, Indian Institute of Technology, Delhi, New Delhi 110016, India.
| | - Hemant Joshi
- Department of Chemistry, Indian Institute of Technology, Delhi, New Delhi 110016, India.
| | - Renu Bhaskar
- Department of Chemistry, Indian Institute of Technology, Delhi, New Delhi 110016, India.
| | - Ajai K Singh
- Department of Chemistry, Indian Institute of Technology, Delhi, New Delhi 110016, India.
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4
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Gu J, Shi LM, Ma XF, Jia AQ, Zhang QF. Synthesis and characterization of mononuclear ruthenium complexes with carboxylato, chlorido and phosphine ligands. Crystal structures of [RuCl2{κ2-O,O-O2CC CH2(CH3)}(PPh3)2], [RuCl2(κ2-O,O-O2CC6H4-2-Cl)(PPh3)2], and [Et3NH][RuCl(SO2)(κ2-C,O-C6H4-2-CO2)(PPh3)2]. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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5
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Saleem F, Rao GK, Kumar S, Singh MP, Singh AK. Complexes of (η6-benzene)ruthenium(ii) with 1,4-bis(phenylthio/seleno-methyl)-1,2,3-triazoles: synthesis, structure and applications in catalytic activation of oxidation and transfer hydrogenation. Dalton Trans 2015; 44:19141-52. [DOI: 10.1039/c5dt02926k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,4-Bis(phenylthio/seleno methyl)-1,2,3-triazoles (L1–L4) synthesized by a ‘Click’ reaction form complexes [(η6-C6H6)RuClL]PF6 (L = L1–L4) suitable as catalyst for oxidation/transfer hydrogenation.
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Affiliation(s)
- Fariha Saleem
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Gyandshwar K. Rao
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Satyendra Kumar
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Mahabir Pratap Singh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Ajai K. Singh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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6
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Saleem F, Rao GK, Kumar A, Mukherjee G, Singh AK. Catalyst Activation with Cp*RhIII/IrIII–1,2,3-Triazole-Based Organochalcogen Ligand Complexes: Transfer Hydrogenation via Loss of Cp* and N-Methylmorpholine N-Oxide Based vs Oppenauer-Type Oxidation. Organometallics 2014. [DOI: 10.1021/om500266p] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Fariha Saleem
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Gyandshwar Kumar Rao
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Arun Kumar
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Goutam Mukherjee
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ajai K. Singh
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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7
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Saleem F, Rao GK, Kumar A, Mukherjee G, Singh AK. Half-Sandwich Ruthenium(II) Complexes of Click Generated 1,2,3-Triazole Based Organosulfur/-selenium Ligands: Structural and Donor Site Dependent Catalytic Oxidation and Transfer Hydrogenation Aspects. Organometallics 2013. [DOI: 10.1021/om400057e] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Fariha Saleem
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Gyandshwar Kumar Rao
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Arun Kumar
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Goutam Mukherjee
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Ajai K. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
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8
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Prakash O, Sharma KN, Joshi H, Gupta PL, Singh AK. Half sandwich complexes of chalcogenated pyridine based bi-(N, S/Se) and terdentate (N, S/Se, N) ligands with (η6-benzene)ruthenium(ii): synthesis, structure and catalysis of transfer hydrogenation of ketones and oxidation of alcohols. Dalton Trans 2013; 42:8736-47. [DOI: 10.1039/c3dt00126a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Grigoropoulos A, Maganas D, Symeonidis D, Giastas P, Cowley AR, Kyritsis P, Pneumatikakis G. Synthesis of Chalcogenidoimidodiphosphinato–Rh
I
Complexes and DFT Investigation of Their Catalytic Activation in Olefin Hydroformylation. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200921] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexios Grigoropoulos
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
| | - Dimitrios Maganas
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
- Max‐Planck Institute for Chemical Energy Conversion, 45470 Mülheim an der Ruhr, Germany
| | - Dimitrios Symeonidis
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
| | - Petros Giastas
- Laboratory of Structural and Supramolecular Chemistry, NCSR “Demokritos”, Agia Paraskevi 15310, Athens, Greece
| | - Andrew R. Cowley
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Panayotis Kyritsis
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
| | - Georgios Pneumatikakis
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis 15771, Athens, Greece, Fax: +30‐210‐7274782, http://www.chem.uoa.gr/
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10
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Weinberg DR, Gagliardi CJ, Hull JF, Murphy CF, Kent CA, Westlake BC, Paul A, Ess DH, McCafferty DG, Meyer TJ. Proton-Coupled Electron Transfer. Chem Rev 2012; 112:4016-93. [DOI: 10.1021/cr200177j] [Citation(s) in RCA: 1125] [Impact Index Per Article: 93.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- David R. Weinberg
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
- Department of Physical and Environmental
Sciences, Colorado Mesa University, 1100 North Avenue, Grand Junction,
Colorado 81501-3122, United States
| | - Christopher J. Gagliardi
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Jonathan F. Hull
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Christine Fecenko Murphy
- Department
of Chemistry, B219
Levine Science Research Center, Box 90354, Duke University, Durham,
North Carolina 27708-0354, United States
| | - Caleb A. Kent
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Brittany C. Westlake
- The American Chemical Society,
1155 Sixteenth Street NW, Washington, District of Columbia 20036,
United States
| | - Amit Paul
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Daniel H. Ess
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
| | - Dewey Granville McCafferty
- Department
of Chemistry, B219
Levine Science Research Center, Box 90354, Duke University, Durham,
North Carolina 27708-0354, United States
| | - Thomas J. Meyer
- Department
of Chemistry, University
of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290,
United States
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11
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Cationic arene ruthenium(II) complexes bearing N, S chelating thiocarboxamides: Synthesis, structure, characterization and catalytic oxidation of alcohols. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2011.10.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Kumar A, Rao GK, Saleem F, Singh AK. Organoselenium ligands in catalysis. Dalton Trans 2012; 41:11949-77. [DOI: 10.1039/c2dt31198d] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Cheung WM, Yi XY, Wang GC, Williams ID, Leung WH. Ruthenium carbene complexes containing bidentate and tridentate PO ligands. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.06.050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Ip HF, Yi XY, Wong WY, Williams ID, Leung WH. Synthesis, structures and reactivity of ruthenium nitrosyl complexes containing Kläui's oxygen tripodal ligand. Dalton Trans 2011; 40:11043-50. [DOI: 10.1039/c1dt10306g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Singh P, Singh AK. Transfer Hydrogenation of Ketones and Catalytic Oxidation of Alcohols with Half-Sandwich Complexes of Ruthenium(II) Designed Using Benzene and Tridentate (S, N, E) Type Ligands (E = S, Se, Te). Organometallics 2010. [DOI: 10.1021/om100807b] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Pradhumn Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ajai K. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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16
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Das D, Singh P, Prakash O, Singh AK. Reactions of benzene based half sandwich ruthenium(II) complex with 2,6-bis((phenylseleno)methyl)pyridine: Preferential substitution of ring resulting in a catalyst of high activity for oxidation of alcohols. INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2010.07.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Singh P, Singh AK. “Piano-Stool” Complexes of Ruthenium(II) Designed with Arenes and N-[2-(Arylchalcogeno)ethyl]morpholines: Highly Active Catalysts for the Oxidation of Alcohols with N-Methylmorpholine N-Oxide, tert-Butyl Hydroperoxide and Sodium Periodate and Oxychloride. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000319] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Das D, Singh P, Singh AK. Palladium and half sandwich ruthenium(II) complexes of selenated and tellurated benzotriazoles: Synthesis, structural aspects and catalytic applications. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.11.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Manna SK, Mazumdar S. Tuning the substrate specificity by engineering the active site of cytochrome P450cam: a rational approach. Dalton Trans 2010; 39:3115-23. [PMID: 20221546 DOI: 10.1039/b922885c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rational design of the active site of cytochrome P450cam has been carried out to catalyse oxygenation of various potentially important chemical reactions. The modeling studies showed that the distal pocket of the heme consisting of the Y96, T101, F87 and L244 residues could be suitably mutated to change the substrate specificity of the enzyme. We found that the mutant enzymes could catalyse oxygenation of indole to produce indigo. While Y96F was found to be several times better as a catalyst for conversion of indole to indigo, the double mutant Y96F/L244A showed the highest NADH oxidation rate as well as yield of indigo. The oxidative catalysis using H(2)O(2) as the oxygen source was found to produce a higher purity of indigo, and lesser or no formation of indirubin was detected. The enzymatic oxygenation of aromatic hydrocarbons such as coumarin and analogues was also found to be enhanced on mutation of Y96 and L244 residues in the enzyme. The studies also showed that mutation of suitable residues can alter the regio-selectivity of hydroxylation of the aromatic hydrocarbons.
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Affiliation(s)
- Soumen Kanti Manna
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
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20
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Singh P, Das D, Singh M, Singh AK. Ligand concentration and reaction time controlled successive substitution of chloro and η6-benzene of di-μ-chlorobis{η6-benzene)dichlororuthenium(II)} with selenated Schiff base: Formation of half sandwich Ru(II) complex highly active catalyst for oxidation of alcohols. INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2009.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2008. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2009.07.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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22
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Oña-Burgos P, Fernández I, Roces L, Torre Fernández L, García-Granda S, López Ortiz F. An Unprecedented Phosphinamidic Gold(III) Metallocycle: Synthesis via Tin(IV) Precursors, Structure, and Multicomponent Catalysis. Organometallics 2009. [DOI: 10.1021/om801137y] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pascual Oña-Burgos
- Área de Química Orgánica, Universidad de Almería, Crta. Sacramento s/n, 04230, Almería, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
| | - Ignacio Fernández
- Área de Química Orgánica, Universidad de Almería, Crta. Sacramento s/n, 04230, Almería, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
| | - Laura Roces
- Área de Química Orgánica, Universidad de Almería, Crta. Sacramento s/n, 04230, Almería, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
| | - Laura Torre Fernández
- Área de Química Orgánica, Universidad de Almería, Crta. Sacramento s/n, 04230, Almería, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
| | - Santiago García-Granda
- Área de Química Orgánica, Universidad de Almería, Crta. Sacramento s/n, 04230, Almería, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
| | - Fernando López Ortiz
- Área de Química Orgánica, Universidad de Almería, Crta. Sacramento s/n, 04230, Almería, Spain, and Departamento de Química Física y Analítica, Universidad de Oviedo, C/ Julián Clavería 8, 33006 Oviedo, Spain
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23
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Affiliation(s)
- My Hang V Huynh
- DE-1: High Explosive Science and Technology Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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