1
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Pandey PK, Patra M, Ranjan P, Kumar Pal N, Choudhary S, Bera JK. A Single Terminal [Ni II-OH] Catalyst for Direct Julia-Type Olefination and α-Alkylation Involving Sulfones and Alcohols. Chemistry 2024; 30:e202400337. [PMID: 38644351 DOI: 10.1002/chem.202400337] [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: 01/26/2024] [Revised: 04/08/2024] [Accepted: 04/21/2024] [Indexed: 04/23/2024]
Abstract
A terminal [NiII-OH] complex 1, supported by triflamide-functionalized NHC ligands, showed divergent reactivity for the reaction of sulfone with alcohol, contingent on base concentration, temperature, and time. Julia-type olefination of alcohols with sulfones was achieved using one equiv. of base, whereas lowering base loading to 0.5 equiv. afforded α-alkylated sulfones. Besides excellent substrate scope and selectivity, biologically active stilbene derivatives DMU-212, pinosylvin, resveratrol, and piceatannol were synthesized in high yield under Julia-type olefination conditions. An extensive array of controlled experiments and DFT calculations provide valuable insight on the reaction pathway.
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Affiliation(s)
- Prabhakar K Pandey
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Moumita Patra
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Prabodh Ranjan
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Nilay Kumar Pal
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sanjay Choudhary
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Jitendra K Bera
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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2
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Kaur M, Adhikari M, Manar KK, Yogesh Y, Prakash D, Singh S. BICAAC-Derived Covalent and Cationic Ir(I) Complexes: Application of Ir(BICAAC)Cl(COD) Complexes as Catalysts for Transfer Hydrogenation and Hydrosilylation Reactions. Inorg Chem 2024; 63:1513-1523. [PMID: 38192194 DOI: 10.1021/acs.inorgchem.3c01914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
The ambiphilic bicyclic (alkyl)(amino)carbenes (Me/iPrBICAAC) upon reaction with [IrCl(COD)]2 smoothly afford mononuclear Ir(I) complexes that have been spectroscopically and structurally characterized. These complexes exhibit good catalytic activity for transfer hydrogenation (TH) of 4-chlorobenzaldehyde using isopropyl alcohol (iPrOH), with turnover frequency values ranging between 6269 and 8093 h-1. Choosing the covalent complex Ir(MeBICAAC)Cl(COD) as a catalyst, a wide array of carbonyls and imines functionalized with electron-withdrawing and electron-donating substituents have been surveyed and afforded their reduced products in moderate-to-good yields. No detachment of the BICAAC unit from the Ir center was observed upon prolonged heating of Ir(MeBICAAC)Cl(COD) in toluene-d8 or isopropyl alcohol-d8, which evidenced good thermal stability of the catalyst. Complex Ir(MeBICAAC)Cl(COD) was also found to be catalytically active for the hydrosilylation of a variety of aldehydes using triethylsilane (Et3SiH).
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Affiliation(s)
- Mandeep Kaur
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
| | - Manu Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
| | - Krishna K Manar
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
| | - Yuvraj Yogesh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
| | - Darsana Prakash
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
| | - Sanjay Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India
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3
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De S, Ranjan P, Chaurasia V, Pal S, Pal S, Pandey P, Bera JK. Synchronous Proton-Hydride Transfer by a Pyrazole-Functionalized Protic Mn(I) Complex in Catalytic Alcohol Dehydrogenative Coupling. Chemistry 2023; 29:e202301758. [PMID: 37490592 DOI: 10.1002/chem.202301758] [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: 06/01/2023] [Revised: 07/23/2023] [Accepted: 07/25/2023] [Indexed: 07/27/2023]
Abstract
A series of Mn(I) complexes Mn(L1 )(CO)3 Br, Mn(L2 )(CO)3 Br, Mn(L1 )(CO)3 (OAc) and Mn(L3 )(CO)3 Br [L1 =2-(5-tert-butyl-1H-pyrazol-3-yl)-1,8-naphthyridine, L2 =2-(5-tert-butyl-1H-pyrazol-3-yl)pyridine, L3 =2-(5-tert-butyl-1-methyl-1H-pyrazol-3-yl)-1,8-naphthyridine] were synthesized and fully characterized. The acid-base equilibrium between the pyrazole and the pyrazolato forms of Mn(L1 )(CO)3 Br was studied by 1 H NMR and UV-vis spectra. These complexes are screened as catalysts for acceptorless dehydrogenative coupling (ADC) of primary alcohols and aromatic diamines for the synthesis of benzimidazole and quinoline derivatives with the release of H2 and H2 O as byproducts. The protic complex Mn(L1 )(CO)3 Br shows the highest catalytic activity for the synthesis of 2-substituted benzimidazole derivatives with broad substrate scope, whereas a related complex [Mn(L3 )(CO)3 Br], which is devoid of the proton responsive β-NH unit, shows significantly reduced catalytic efficiency validating the crucial role of the β-NH functionality for the alcohol dehydrogenation reactions. Control experiments, kinetic and deuterated studies, and density functional theory (DFT) calculations reveal a synchronous hydride-proton transfer by the metal-ligand construct in the alcohol dehydrogenation step.
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Affiliation(s)
- Subhabrata De
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Prabodh Ranjan
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Vishal Chaurasia
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sourav Pal
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Saikat Pal
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Pragati Pandey
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Jitendra K Bera
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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4
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Maji B, Kumar A, Bhattacherya A, Bera JK, Choudhury J. Cyclic Amide-Anchored NHC-Based Cp*Ir Catalysts for Bidirectional Hydrogenation–Dehydrogenation with CO 2/HCO 2H Couple. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Babulal Maji
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Abhishek Kumar
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Arindom Bhattacherya
- Department of Chemistry and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Jitendra K. Bera
- Department of Chemistry and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
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5
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Sato K, Komuro T, Osawa T, Hashimoto H, Tobita H. Iridium Complexes with a Naphthyridine-Based Si, N-Ligand: Synthesis and Catalytic Activity toward Olefin Hydrogenation. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00373] [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]
Affiliation(s)
- Keita Sato
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Takashi Komuro
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Tomohiro Osawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Hisako Hashimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Hiromi Tobita
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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6
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Maji B, Bhandari A, Sadhukhan R, Choudhury J. Water-soluble and reusable Ru-NHC catalyst for aqueous-phase transfer hydrogenation of quinolines with formic acid. Dalton Trans 2022; 51:8258-8265. [PMID: 35579118 DOI: 10.1039/d2dt00571a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water-soluble Ru-NHC complexes were synthesized and their catalytic activity was tested in the transfer hydrogenation of quinoline-type N-heteroarenes using a formic acid/sodium formate buffer solution. The unique multifunctional features of the designed ligand within the catalyst backbone endowed it with excellent durability, reusability and compatibility with a simple aqueous-phase operation. Thus, it was possible to reuse as little as 0.25 mol% of the catalyst for three consecutive catalytic runs to provide an overall turnover number of around 900. A mechanistic investigation suggested that hydride generation was the rate-limiting step, whereas hydride transfer was relatively facile. Furthermore, computational studies supported that the reaction pathway was dominated by 1,4-hydride insertion at the N-heteroarene substrates.
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Affiliation(s)
- Babulal Maji
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal 462 066, India.
| | - Anirban Bhandari
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal 462 066, India.
| | - Rayantan Sadhukhan
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal 462 066, India.
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal 462 066, India.
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7
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Maji B, Choudhury J. Reusable Water‐Soluble Homogeneous Catalyst in Aqueous‐Phase Transfer Hydrogenation of N‐Heteroarenes with Formic Acid: Uracil–Based Bifunctional Ir–NHC Catalyst is the Key. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Babulal Maji
- Organometallics & Smart Materials Laboratory, Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal India
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8
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Patra K, Laskar RA, Nath A, Bera JK. A Protic Mn(I) Complex Based on a Naphthyridine- N-oxide Scaffold: Protonation/Deprotonation Studies and Catalytic Applications for Alkylation of Ketones. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00085] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Kamaless Patra
- Department of Chemistry and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Roshayed Ali Laskar
- Department of Chemistry and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Anubhav Nath
- Department of Chemistry and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Jitendra K. Bera
- Department of Chemistry and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
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9
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Wang J, Liu C, Cao L, Xiong Y, Ye J, Liu Z, Cheng R. Theoretical investigation of mechanism and ligand effects on half-sandwich iridium complexes for direct reductive amination. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.112050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Birenheide BS, Krämer F, Bayer L, Mehlmann P, Dielmann F, Breher F. Multistimuli-Responsive [3]Dioxaphosphaferrocenophanes with Orthogonal Switches. Chemistry 2021; 27:15066-15073. [PMID: 34459528 PMCID: PMC8596786 DOI: 10.1002/chem.202101969] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Indexed: 02/02/2023]
Abstract
Novel multistimuli‐responsive phosphine ligands comprising a redox‐active [3]dioxaphosphaferrocenophane backbone and a P‐bound imidazolin‐2‐ylidenamino entity that allows switching by protonation are reported. Investigation of the corresponding metal complexes and their redox behaviour are reported and show the sensitivity of the system towards protonation and metal coordination. The experimental findings are supported by DFT calculations. Protonation and oxidation events are applied in Rh‐catalysed hydrosilylations and demonstrate a remarkable influence on reactivity and/or selectivity.
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Affiliation(s)
- Bernhard S Birenheide
- Institute of Inorganic Chemistry, Division Molecular Chemistry Karlsruhe Institute of Technology (KIT), Engesserstr.15, 76131, Karlsruhe, Germany
| | - Felix Krämer
- Institute of Inorganic Chemistry, Division Molecular Chemistry Karlsruhe Institute of Technology (KIT), Engesserstr.15, 76131, Karlsruhe, Germany
| | - Lea Bayer
- Institute of Inorganic Chemistry, Division Molecular Chemistry Karlsruhe Institute of Technology (KIT), Engesserstr.15, 76131, Karlsruhe, Germany
| | - Paul Mehlmann
- Department of General, Inorganic and Theoretical Chemistry Division Molecular Chemistry, University of Innsbruck Center for Chemistry and Biomedicine Innrain 80-82, 6020, Innsbruck, Austria
| | - Fabian Dielmann
- Department of General, Inorganic and Theoretical Chemistry Division Molecular Chemistry, University of Innsbruck Center for Chemistry and Biomedicine Innrain 80-82, 6020, Innsbruck, Austria
| | - Frank Breher
- Institute of Inorganic Chemistry, Division Molecular Chemistry Karlsruhe Institute of Technology (KIT), Engesserstr.15, 76131, Karlsruhe, Germany
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11
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Zhou C, Zhao Y, Tan F, Guo Y, Li Y. Utilization of renewable formic acid from lignocellulosic biomass for the selective hydrogenation and/or N‐methylation. ChemCatChem 2021. [DOI: 10.1002/cctc.202101099] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Chao‐Zheng Zhou
- Center for Organic Chemistry of Frontier Institute of Science Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710054 P. R. China
| | - Yu‐Rou Zhao
- Center for Organic Chemistry of Frontier Institute of Science Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710054 P. R. China
| | - Fang‐Fang Tan
- Center for Organic Chemistry of Frontier Institute of Science Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710054 P. R. China
| | - Yan‐Jun Guo
- Center for Organic Chemistry of Frontier Institute of Science Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710054 P. R. China
| | - Yang Li
- Center for Organic Chemistry of Frontier Institute of Science Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710054 P. R. China
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12
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Kaur M, U Din Reshi N, Patra K, Bhattacherya A, Kunnikuruvan S, Bera JK. A Proton-Responsive Pyridyl(benzamide)-Functionalized NHC Ligand on Ir Complex for Alkylation of Ketones and Secondary Alcohols. Chemistry 2021; 27:10737-10748. [PMID: 33998720 DOI: 10.1002/chem.202101360] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Indexed: 12/22/2022]
Abstract
A Cp*Ir(III) complex (1) of a newly designed ligand L1 featuring a proton-responsive pyridyl(benzamide) appended on N-heterocyclic carbene (NHC) has been synthesized. The molecular structure of 1 reveals a dearomatized form of the ligand. The protonation of 1 with HBF4 in tetrahydrofuran gives the corresponding aromatized complex [Cp*Ir(L1 H)Cl]BF4 (2). Both compounds are characterized spectroscopically and by X-ray crystallography. The protonation of 1 with acid is examined by 1 H NMR and UV-vis spectra. The proton-responsive character of 1 is exploited for catalyzing α-alkylation of ketones and β-alkylation of secondary alcohols using primary alcohols as alkylating agents through hydrogen-borrowing methodology. Compound 1 is an effective catalyst for these reactions and exhibits a superior activity in comparison to a structurally similar iridium complex [Cp*Ir(L2 )Cl]PF6 (3) lacking a proton-responsive pendant amide moiety. The catalytic alkylation is characterized by a wide substrate scope, low catalyst and base loadings, and a short reaction time. The catalytic efficacy of 1 is also demonstrated for the syntheses of quinoline and lactone derivatives via acceptorless dehydrogenation, and selective alkylation of two steroids, pregnenolone and testosterone. Detailed mechanistic investigations and DFT calculations substantiate the role of the proton-responsive ligand in the hydrogen-borrowing process.
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Affiliation(s)
- Mandeep Kaur
- Department of Chemistry and Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Noor U Din Reshi
- Department of Chemistry and Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Kamaless Patra
- Department of Chemistry and Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Arindom Bhattacherya
- Department of Chemistry and Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sooraj Kunnikuruvan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, 695551, India
| | - Jitendra K Bera
- Department of Chemistry and Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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13
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Yadav S, Reshi NUD, Pal S, Bera JK. Aerobic oxidation of primary amines to amides catalyzed by an annulated mesoionic carbene (MIC) stabilized Ru complex. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01541a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A Ru complex, stabilized by an annulated mesoionic carbene ligand, catalyzes the aerobic oxidation of a host of primary amines to amides in high yields and excellent selectivity. Kinetics, Hammett and DFT studies provide mechanistic insight.
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Affiliation(s)
- Suman Yadav
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Noor U Din Reshi
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Saikat Pal
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Jitendra K. Bera
- Department of Chemistry and Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
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