1
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Paul B, Kundu S. The use of methanol as a C1 building block. Nat Protoc 2024; 19:2358-2385. [PMID: 38664579 DOI: 10.1038/s41596-024-00978-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 02/02/2024] [Indexed: 08/09/2024]
Abstract
Methanol is a key building block in the chemical industry. In recent years, it has been used as a C1 source in various organic transformations in the presence of a transition-metal catalyst. This protocol describes the ruthenium- and cobalt-catalyzed utilization of methanol in different types of methylation reactions and heterocycle synthesis. Initially, we describe the synthesis of tridentate ligands (L1-L3) and their corresponding Ru(II) complexes (Ru-1, -2 and -3) and then detail how to apply these Ru(II) complexes and Co/PP3 (PP3 = P(CH2CH2PPh2)3) in various methanol dehydrogenative coupling reactions. We discuss six types of transformations by using methanol or a methanol/water mixture. The experimental setup for all the catalytic reactions is similar and involves adding all the respective reagents and solvents to an argon-filled pressure tube, which is sealed (by screw cap) and refluxed at the indicated temperature before the desired products are isolated and characterized. The catalytic systems described in this protocol work well for both small-scale and preparative-scale synthesis of various N-methylated amines/amides, C-methylated products and quinazolinones. These catalytic reactions are greener and more sustainable than conventional synthesis methods, with only H2 and/or H2O as by-products, and we evaluate the 'green chemistry metrics' for a typical substrate. The total time required for the catalytic experiments described in this protocol is 16-28 h, and the operation time is 4 h. An average level of expertise in organic synthesis is required to carry out these protocols.
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Affiliation(s)
- Bhaskar Paul
- Department of Chemistry, University of Oxford, Oxford, UK.
- Department of Chemistry, Indian Institute of Technology, Kanpur, India.
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology, Kanpur, India.
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2
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Queffélec C, Pati PB, Pellegrin Y. Fifty Shades of Phenanthroline: Synthesis Strategies to Functionalize 1,10-Phenanthroline in All Positions. Chem Rev 2024; 124:6700-6902. [PMID: 38747613 DOI: 10.1021/acs.chemrev.3c00543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
1,10-Phenanthroline (phen) is one of the most popular ligands ever used in coordination chemistry due to its strong affinity for a wide range of metals with various oxidation states. Its polyaromatic structure provides robustness and rigidity, leading to intriguing features in numerous fields (luminescent coordination scaffolds, catalysis, supramolecular chemistry, sensors, theranostics, etc.). Importantly, phen offers eight distinct positions for functional groups to be attached, showcasing remarkable versatility for such a simple ligand. As a result, phen has become a landmark molecule for coordination chemists, serving as a must-use ligand and a versatile platform for designing polyfunctional arrays. The extensive use of substituted phenanthroline ligands with different metal ions has resulted in a diverse array of complexes tailored for numerous applications. For instance, these complexes have been utilized as sensitizers in dye-sensitized solar cells, as luminescent probes modified with antibodies for biomaterials, and in the creation of elegant supramolecular architectures like rotaxanes and catenanes, exemplified by Sauvage's Nobel Prize-winning work in 2016. In summary, phen has found applications in almost every facet of chemistry. An intriguing aspect of phen is the specific reactivity of each pair of carbon atoms ([2,9], [3,8], [4,7], and [5,6]), enabling the functionalization of each pair with different groups and leading to polyfunctional arrays. Furthermore, it is possible to differentiate each position in these pairs, resulting in non-symmetrical systems with tremendous versatility. In this Review, the authors aim to compile and categorize existing synthetic strategies for the stepwise polyfunctionalization of phen in various positions. This comprehensive toolbox will aid coordination chemists in designing virtually any polyfunctional ligand. The survey will encompass seminal work from the 1950s to the present day. The scope of the Review will be limited to 1,10-phenanthroline, excluding ligands with more intracyclic heteroatoms or fused aromatic cycles. Overall, the primary goal of this Review is to highlight both old and recent synthetic strategies that find applicability in the mentioned applications. By doing so, the authors hope to establish a first reference for phenanthroline synthesis, covering all possible positions on the backbone, and hope to inspire all concerned chemists to devise new strategies that have not yet been explored.
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Affiliation(s)
| | | | - Yann Pellegrin
- Nantes Université, CEISAM UMR 6230, F-44000 Nantes, France
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3
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Cook A, Newman SG. Alcohols as Substrates in Transition-Metal-Catalyzed Arylation, Alkylation, and Related Reactions. Chem Rev 2024; 124:6078-6144. [PMID: 38630862 DOI: 10.1021/acs.chemrev.4c00094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Alcohols are abundant and attractive feedstock molecules for organic synthesis. Many methods for their functionalization require them to first be converted into a more activated derivative, while recent years have seen a vast increase in the number of complexity-building transformations that directly harness unprotected alcohols. This Review discusses how transition metal catalysis can be used toward this goal. These transformations are broadly classified into three categories. Deoxygenative functionalizations, representing derivatization of the C-O bond, enable the alcohol to act as a leaving group toward the formation of new C-C bonds. Etherifications, characterized by derivatization of the O-H bond, represent classical reactivity that has been modernized to include mild reaction conditions, diverse reaction partners, and high selectivities. Lastly, chain functionalization reactions are described, wherein the alcohol group acts as a mediator in formal C-H functionalization reactions of the alkyl backbone. Each of these three classes of transformation will be discussed in context of intermolecular arylation, alkylation, and related reactions, illustrating how catalysis can enable alcohols to be directly harnessed for organic synthesis.
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Affiliation(s)
- Adam Cook
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Stephen G Newman
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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4
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Mullick S, Ghosh A, Banerjee D. Recent advances in cross-coupling of alcohols via borrowing hydrogen catalysis. Chem Commun (Camb) 2024; 60:4002-4014. [PMID: 38451211 DOI: 10.1039/d4cc00003j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Application of the borrowing hydrogen strategy facilitates utilization of abundantly available alcohols for linear or branched long-chain alcohols. Selective synthesis of such alcohols is highly challenging and involves the utilization of transition metal catalysts towards the desired cross-coupled product. Herein, we have highlighted recent advances (from 2015 to 2023) towards the synthesis of higher alcohols. Major focus has been given to the development of ligands, including transition metal catalysts. Judicious catalyst design plays a key role in the alkylation process and is summarised in this review.
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Affiliation(s)
- Suteerna Mullick
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Adrija Ghosh
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Debasis Banerjee
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
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5
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Robust unsymmetric pincer-type Ru(II) catalyst containing proton-responsive hydroxypyridyl fragment for β-alkylation of secondary alcohols with primary alcohols. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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6
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Manojveer S, Garg NK, Gul Z, Kanwal A, Goriya Y, Johnson MT. Ligand-Promoted [Pd]-Catalyzed α-Alkylation of Ketones through a Borrowing-Hydrogen Approach. ChemistryOpen 2023; 12:e202200245. [PMID: 36592045 PMCID: PMC9807026 DOI: 10.1002/open.202200245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/02/2022] [Indexed: 01/03/2023] Open
Abstract
A new class of palladium complexes bearing bidentate 2-hydroxypyridine based ligands have been prepared and fully characterized. The applications of these new complexes towards ketone alkylation reactions with alcohols through a metal-ligand cooperative borrowing-hydrogen (BH) process were demonstrated.
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Affiliation(s)
- Seetharaman Manojveer
- Centre for Analysis and SynthesisDepartment of ChemistryLund UniversityP. O. Box 124221 00LundSweden
| | - Nitish K. Garg
- Centre for Analysis and SynthesisDepartment of ChemistryLund UniversityP. O. Box 124221 00LundSweden
| | - Zarif Gul
- Centre for Analysis and SynthesisDepartment of ChemistryLund UniversityP. O. Box 124221 00LundSweden
| | - Ayesha Kanwal
- Centre for Analysis and SynthesisDepartment of ChemistryLund UniversityP. O. Box 124221 00LundSweden
| | - Yogesh Goriya
- Centre for Analysis and SynthesisDepartment of ChemistryLund UniversityP. O. Box 124221 00LundSweden
| | - Magnus T. Johnson
- Centre for Analysis and SynthesisDepartment of ChemistryLund UniversityP. O. Box 124221 00LundSweden
- Perstorp ABPerstorp Industrial Park284 80PerstorpSweden
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7
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Kumar A, Ta S, Nettem C, Tanski JM, Rajaraman G, Ghosh P. One pot tandem dehydrogenative cross-coupling of primary and secondary alcohols by ruthenium amido-functionalized 1,2,4-triazole derived N-heterocyclic carbene complexes. RSC Adv 2022; 12:28961-28984. [PMID: 36320780 PMCID: PMC9557752 DOI: 10.1039/d2ra05531g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 09/29/2022] [Indexed: 11/05/2022] Open
Abstract
One-pot tandem dehydrogenative cross-coupling of primary and secondary alcohols was catalyzed by three ruthenium complexes [1-(R)-4-N-(furan-2-ylmethyl)acetamido-1,2,4-triazol-5-ylidene]Ru(p-cymene)Cl [R = Et (1b), i-Pr (2b), Bn (3b)], of amido-functionalized 1,2,4-triazole derived N-heterocyclic carbene (NHC) ligands. Density Functional Theory (DFT) calculations were employed for the ruthenium (1b) precatalyst to understand this reaction mechanism completely, and the mechanisms adapted are divided categorically into three steps (i) nucleophilic substitution of chloride ions by alcohols, (ii) dehydrogenation of primary and secondary alcohols, and (iii) olefin and ketone hydrogenation. Our mechanistic study reveals that the formation of a deprotonated Ru-alcoholate (A) or (E) intermediate is favorable compared to the protonated form (A') or (E') from (1b) by associative nucleophilic substitution. Though an ionic pathway that proceeds through (A') or (E'), has less barriers in the dehydrogenation and olefin/ketone hydrogenation steps than that of the neutral pathway, proceeding through (A) or (E), a steep energy barrier was observed in the first nucleophilic substitution step, prohibiting the reaction to proceed via the intermediate (A') or (E'). Thus, our thorough mechanistic study reveals that the reaction proceeds via deprotonated Ru-alcoholate (A) or (E) species. Furthermore, the 1,4 addition of an α,β-unsaturated carbonyl compound is kinetically and thermodynamically favorable over the 1,2 addition, and the experiments support these observations. As a testimony towards practical application in synthesizing bio-active flavonoid based natural products, five different flavan derivatives (16-20), were synthesized by the dehydrogenative coupling reaction using the neutral ruthenium (1-3)b complexes.
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Affiliation(s)
- Anuj Kumar
- Department of Chemistry, Indian Institute of Technology BombayPowaiMumbai 400 076India+91 22 2572 3480
| | - Sabyasachi Ta
- Department of Chemistry, Indian Institute of Technology BombayPowaiMumbai 400 076India+91 22 2572 3480
| | - Chandrasekhar Nettem
- Department of Chemistry, Indian Institute of Technology BombayPowaiMumbai 400 076India+91 22 2572 3480
| | - Joseph M. Tanski
- Department of Chemistry, Vassar College124 Raymond AvenuePoughkeepsieNY12604USA
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology BombayPowaiMumbai 400 076India+91 22 2572 3480
| | - Prasenjit Ghosh
- Department of Chemistry, Indian Institute of Technology BombayPowaiMumbai 400 076India+91 22 2572 3480
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8
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Nandi PG, Thombare P, Prathapa SJ, Kumar A. Pincer-Cobalt-Catalyzed Guerbet-Type β-Alkylation of Alcohols in Air under Microwave Conditions. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00322] [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)
- Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Prasad Thombare
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | | | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
- Jyoti and Bhupat Mehta School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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9
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Narjinari H, Tanwar N, Kathuria L, Jasra RV, Kumar A. Guerbet-type β-alkylation of secondary alcohols catalyzed by chromium chloride and its corresponding NNN pincer complex. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00759b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
β-Alkylation of alcohols has been efficiently accomplished using readily available 3d metal Cr under microwave conditions in air. Well-defined molecular Cr is involved with a KIE of 7.33 and insertion of α-alkylated ketone into Cr–H bond as the RDS.
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Affiliation(s)
- Himani Narjinari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Niharika Tanwar
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Lakshay Kathuria
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Raksh Vir Jasra
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Reliance Industries limited, R&D Centre, Vadodara Manufacturing Division, Vadodara, 391 346, Gujarat, India
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Jyoti and Bhupat School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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10
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Ganguli K, Belkova N, Kundu S. Cyclometalated (NNC)Ru(II) complex catalyzed β-methylation of alcohols using methanol. Dalton Trans 2022; 51:4354-4365. [DOI: 10.1039/d1dt03967a] [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
Indolyl fragment containing phenanthroline based new ligands and their corresponding Ru(II) complexes were synthesized and fully characterized by various spectroscopic techniques. Catalytic activity of these newly synthesized cyclometalated (NNC)Ru(II) complexes...
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11
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Nandi PG, Kumar P, Kumar A. Ligand-free Guerbet-type reactions in air catalyzed by in situ formed complexes of base metal salt cobaltous chloride. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02159a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Inexpensive, earth-abundant & environmentally benign CoCl2 efficiently catalyses the β-alkylation of alcohol in unprecedented yields (89%) & turnovers (8900). Mechanistic studies are indicative of in situ generated homogeneous molecular Co catalysts.
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Affiliation(s)
- Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Pradhuman Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- School of Health Science & Technology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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12
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Biswas N, Srimani D. Ru-Catalyzed Selective Catalytic Methylation and Methylenation Reaction Employing Methanol as the C1 Source. J Org Chem 2021; 86:10544-10554. [PMID: 34263597 DOI: 10.1021/acs.joc.1c01185] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Methanol can be employed as a green and sustainable methylating agent to form C-C and C-N bonds via borrowing hydrogen (BH) methodology. Herein we explored the activity of the acridine-derived SNS-Ru pincer for the activation of methanol to apply it as a C1 building block in different reactions. Our catalytic system shows great success toward the β-C(sp3)-methylation reaction of 2-phenylethanols to provide good to excellent yields of the methylated products. We investigated the mechanistic details, kinetic progress, and temperature-dependent product distribution, which revealed the slow and steady generation of in situ formed aldehyde, is the key factor to get the higher yield of the β-methylated product. To establish the environmental benefit of this reaction, green chemistry metrics are calculated. Furthermore, dimerization of 2-naphthol via methylene linkage and formation of N-methylation of amine are also described in this study, which offers a wide range of substrate scope with a good to excellent yield.
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Affiliation(s)
- Nandita Biswas
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India
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13
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Affiliation(s)
- Vinay Arora
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Himani Narjinari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- Center for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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14
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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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15
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Babu R, Subaramanian M, Midya SP, Balaraman E. Nickel-Catalyzed Guerbet Type Reaction: C-Alkylation of Secondary Alcohols via Double (de)Hydrogenation. Org Lett 2021; 23:3320-3325. [PMID: 33881325 DOI: 10.1021/acs.orglett.1c00782] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Acceptorless double dehydrogenative cross-coupling of secondary and primary alcohols under nickel catalysis is reported. This Guerbet type reaction provides an atom- and a step-economical method for the C-alkylation of secondary alcohols under mild, benign conditions. A broad range of substrates including aromatic, cyclic, acyclic, and aliphatic alcohols was well tolerated. Interestingly, the C-alkylation of cholesterol derivatives and the double C-alkylation of cyclopentanol with various alcohols were also demonstrated.
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Affiliation(s)
- Reshma Babu
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Murugan Subaramanian
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Siba P Midya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Ekambaram Balaraman
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
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16
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Sung K, Lee M, Cheong Y, Kim YK, Yu S, Jang H. Ir(NHC)‐Catalyzed Synthesis of β‐Alkylated Alcohols via Borrowing Hydrogen Strategy: Influence of Bimetallic Structure. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100219] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kihyuk Sung
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Mi‐hyun Lee
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Yeon‐Joo Cheong
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Yu Kwon Kim
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Sungju Yu
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
| | - Hye‐Young Jang
- Department of Energy Systems Research Ajou University Suwon 16499 South Korea
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17
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Roy BC, Ganguli K, Samim SA, Kundu S. Alkyl Phosphine Free, Metal‐Ligand Cooperative Complex Catalyzed Alcohol Dehydrogenative Coupling Reactions. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100034] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | - Sabuj Kundu
- Department of Chemistry IIT Kanpur Kanpur 208016, UP India
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18
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Botubol-Ares JM, Cordón-Ouahhabi S, Moutaoukil Z, Collado IG, Jiménez-Tenorio M, Puerta MC, Valerga P. Methylene-Linked Bis-NHC Half-Sandwich Ruthenium Complexes: Binding of Small Molecules and Catalysis toward Ketone Transfer Hydrogenation. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00045] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- José Manuel Botubol-Ares
- Departamento de Química Orgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Safa Cordón-Ouahhabi
- Departamento de Química Orgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Zakaria Moutaoukil
- Departamento de Química Orgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Isidro G. Collado
- Departamento de Química Orgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Manuel Jiménez-Tenorio
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - M. Carmen Puerta
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Pedro Valerga
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica-INBIO, Facultad de Ciencias, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
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19
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Luo N, Zhong Y, Wen H, Shui H, Luo R. Iridium Complexes as Efficient Catalysts for Construction of
α
‐Substituted Ketones via Hydrogen Borrowing of Alcohols in Water. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001550] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Nianhua Luo
- School of Pharmaceutical Sciences Gannan Medical University 341000 Ganzhou Jiangxi Province P. R. China
| | - Yuhong Zhong
- School of Pharmaceutical Sciences Gannan Medical University 341000 Ganzhou Jiangxi Province P. R. China
| | - Huiling Wen
- School of Pharmaceutical Sciences Gannan Medical University 341000 Ganzhou Jiangxi Province P. R. China
| | - Hongling Shui
- School of Pharmaceutical Sciences Gannan Medical University 341000 Ganzhou Jiangxi Province P. R. China
| | - Renshi Luo
- School of Pharmaceutical Sciences Gannan Medical University 341000 Ganzhou Jiangxi Province P. R. China
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20
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Chakrabarti K, Dutta K, Kundu S. Synthesis of N-methylated amines from acyl azides using methanol. Org Biomol Chem 2020; 18:5891-5896. [PMID: 32677635 DOI: 10.1039/d0ob01303j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The transformation of acyl azide derivatives into N-methylamines was developed using methanol as the C1 source via the one-pot Curtius rearrangement and borrowing hydrogen methodology. Following this protocol, various functionalised N-methylated amines were synthesized using the (NNN)Ru(ii) complex from carboxylic acids via an acyl azide intermediate. Several kinetic studies and DFT calculations were carried out to support the mechanism and also to determine the role of the Ru(ii) complex and base in this transformation.
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Affiliation(s)
- Kaushik Chakrabarti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
| | - Kuheli Dutta
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
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21
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Recent Advances in Homogeneous Catalysis via Metal–Ligand Cooperation Involving Aromatization and Dearomatization. Catalysts 2020. [DOI: 10.3390/catal10060635] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Recently, an increasing number of metal complex catalysts have been developed to achieve the activation or transformation of substrates based on cooperation between the metal atom and its ligands. In such “cooperative catalysis,” the ligand not only is bound to the metal, where it exerts steric and electronic effects, but also functionally varies its structure during the elementary processes of the catalytic reaction. In this review article, we focus on metal–ligand cooperation involving aromatization and dearomatization of the ligand, thus introducing the newest developments and examples of homogeneous catalytic reactions.
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22
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Wang K, Zhang L, Tang W, Sun H, Xue D, Lei M, Xiao J, Wang C. Asymmetric Guerbet Reaction to Access Chiral Alcohols. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003104] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Kun Wang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Lin Zhang
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 China
| | - Weijun Tang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Huaming Sun
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Dong Xue
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 China
| | - Jianliang Xiao
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
- Department of Chemistry University of Liverpool Liverpool L69 7ZD UK
| | - Chao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
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23
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Wang K, Zhang L, Tang W, Sun H, Xue D, Lei M, Xiao J, Wang C. Asymmetric Guerbet Reaction to Access Chiral Alcohols. Angew Chem Int Ed Engl 2020; 59:11408-11415. [DOI: 10.1002/anie.202003104] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Kun Wang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Lin Zhang
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 China
| | - Weijun Tang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Huaming Sun
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Dong Xue
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
| | - Ming Lei
- State Key Laboratory of Chemical Resource Engineering Institute of Computational Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 China
| | - Jianliang Xiao
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
- Department of Chemistry University of Liverpool Liverpool L69 7ZD UK
| | - Chao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China
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24
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Bettoni L, Gaillard S, Renaud JL. Iron-Catalyzed α-Alkylation of Ketones with Secondary Alcohols: Access to β-Disubstituted Carbonyl Compounds. Org Lett 2020; 22:2064-2069. [PMID: 32091220 DOI: 10.1021/acs.orglett.0c00549] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An iron-catalyzed borrowing hydrogen strategy has been applied in the synthesis of β-branched carbonyl compounds. Various secondary benzylic and aliphatic alcohols have been used as alkylating reagents under mild reaction conditions. The ketones have been isolated in good to excellent yield. Deuterium labeling experiments provide evidence that the alcohol is the hydride source in this reaction and that no reversible step or hydrogen/deuterium scrambling takes place during the process.
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Affiliation(s)
- Léo Bettoni
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin,14000 Caen, France
| | - Sylvain Gaillard
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin,14000 Caen, France
| | - Jean-Luc Renaud
- Normandie Univ., LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin,14000 Caen, France
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25
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Ojha N, Bajpai A, Kumar S. Enhanced and selective photocatalytic reduction of CO2 by H2O over strategically doped Fe and Cr into porous boron carbon nitride. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00343c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Strategic doping of metals and non-metals into a photocatalyst can help in tuning the band gap and alignment of band structure.
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Affiliation(s)
- Niwesh Ojha
- Gas-Solid Interaction Laboratory
- Department of Chemical and Biochemical Engineering
- Indian Institute of Technology Patna
- Patna
- India
| | - Abhinav Bajpai
- Gas-Solid Interaction Laboratory
- Department of Chemical and Biochemical Engineering
- Indian Institute of Technology Patna
- Patna
- India
| | - Sushant Kumar
- Gas-Solid Interaction Laboratory
- Department of Chemical and Biochemical Engineering
- Indian Institute of Technology Patna
- Patna
- India
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26
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Zhang J, Guo B, Young DJ, Li HX. Acceptorless dehydrogenative coupling with Ru-based catalysts for the synthesis of N-heteroaromatic compounds. Dalton Trans 2020; 49:15527-15547. [DOI: 10.1039/d0dt03282d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A summary of recently developed ruthenium catalysts for the synthesis of N-heteroaromatic compounds via acceptorless dehydrogenative coupling (ADC) and the related auto-transfer-hydrogenative (ATH) reaction.
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Affiliation(s)
- Jing Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Bin Guo
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - David James Young
- College of Engineering
- Information Technology and Environment
- Charles Darwin University
- Darwin NT 0909
- Australia
| | - Hong-Xi Li
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
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27
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Das K, Yasmin E, Das B, Srivastava HK, Kumar A. Phosphine-free pincer-ruthenium catalyzed biofuel production: high rates, yields and turnovers of solventless alcohol alkylation. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01679a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High TONs and TOFs are observed for the β-alkylation of alcohols using phosphine-free pincer-ruthenium catalysts at a very low base loading. Kinetic studies and DFT calculations were complementary and provide a clear understanding on the mechanism.
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Affiliation(s)
- Kanu Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Eileen Yasmin
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Babulal Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Hemant Kumar Srivastava
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research Guwahati
- Guwahati
- India
| | - Akshai Kumar
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
- Centre for Nanotechnology
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28
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Maji M, Chakrabarti K, Panja D, Kundu S. Sustainable synthesis of N-heterocycles in water using alcohols following the double dehydrogenation strategy. J Catal 2019. [DOI: 10.1016/j.jcat.2019.03.028] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Das K, Dutta M, Das B, Srivastava HK, Kumar A. Efficient Pincer‐Ruthenium Catalysts for Kharasch Addition of Carbon Tetrachloride to Styrene. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900107] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kanu Das
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati- 781039, Assam India
| | - Moumita Dutta
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati- 781039, Assam India
| | - Babulal Das
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati- 781039, Assam India
| | - Hemant Kumar Srivastava
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati- 781039, Assam India
| | - Akshai Kumar
- Department of ChemistryIndian Institute of Technology Guwahati Guwahati- 781039, Assam India
- Center for NanotechnologyIndian Institute of Technology Guwahati Guwahati- 781039, Assam India
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30
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Genç S, Arslan B, Gülcemal S, Günnaz S, Çetinkaya B, Gülcemal D. Iridium(I)-Catalyzed C–C and C–N Bond Formation Reactions via the Borrowing Hydrogen Strategy. J Org Chem 2019; 84:6286-6297. [DOI: 10.1021/acs.joc.9b00632] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sertaç Genç
- Chemistry Department, Ege University, Bornova, 35100 Izmir, Turkey
| | - Burcu Arslan
- Chemistry Department, Ege University, Bornova, 35100 Izmir, Turkey
| | | | - Salih Günnaz
- Chemistry Department, Ege University, Bornova, 35100 Izmir, Turkey
| | - Bekir Çetinkaya
- Chemistry Department, Ege University, Bornova, 35100 Izmir, Turkey
| | - Derya Gülcemal
- Chemistry Department, Ege University, Bornova, 35100 Izmir, Turkey
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31
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Maji M, Kundu S. Cooperative ruthenium complex catalyzed multicomponent synthesis of pyrimidines. Dalton Trans 2019; 48:17479-17487. [DOI: 10.1039/c9dt04040d] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The ruthenium-catalyzed multicomponent synthesis of pyrimidines from amidines and alcohols is reported for the first time.
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Affiliation(s)
- Milan Maji
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Sabuj Kundu
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
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32
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Shi J, Hu B, Ren P, Shang S, Yang X, Chen D. Synthesis and Reactivity of Metal–Ligand Cooperative Bifunctional Ruthenium Hydride Complexes: Active Catalysts for β-Alkylation of Secondary Alcohols with Primary Alcohols. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00432] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jing Shi
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Bowen Hu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Peng Ren
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People’s Republic of China
| | - Shu Shang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Xinzheng Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Dafa Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
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33
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Manojveer S, Forrest SJK, Johnson MT. Ru-Catalyzed Completely Deoxygenative Coupling of 2-Arylethanols through Base-Induced Net Decarbonylation. Chemistry 2018; 24:803-807. [PMID: 29239494 DOI: 10.1002/chem.201705208] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Indexed: 01/25/2023]
Abstract
Substituted arylethanols can be coupled by using a readily available Ru catalyst in a fully deoxygenative manner to produce hydrocarbon chains in one step. Control experiments indicate that the first deoxygenation occurs through an aldol condensation, whereas the second occurs through a base-induced net decarbonylation. This double deoxygenation enables further development in the use of alcohols as versatile and green alkylating reagents, as well as in other fields, such as deoxygenation and upgrading of overfunctionalized biomass to produce hydrocarbons.
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Affiliation(s)
- Seetharaman Manojveer
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden
| | - Sebastian J K Forrest
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden
| | - Magnus T Johnson
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, 22100, Lund, Sweden
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34
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Tshabang N, Makgatle GP, Bourne SA, Kann N, Evans JD, Coudert FX, Öhrström L. Conformational chiral polymorphism in cis-bis-triphenylphosphine complexes of transition metals. CrystEngComm 2018. [DOI: 10.1039/c8ce00337h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Analysis of conformation polymorphism in cis-bis-triphenylphosphine complexes points to the importance of coordination numbers and homochirality of PPh3 ligands.
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Affiliation(s)
- Never Tshabang
- Department of Chemistry
- Faculty of Science
- University of Botswana
- Gaborone
- Botswana
| | - Gaone P. Makgatle
- Department of Chemistry
- Faculty of Science
- University of Botswana
- Gaborone
- Botswana
| | - Susan A. Bourne
- Centre for Supramolecular Chemistry Research
- Department of Chemistry
- University of Cape Town
- Cape Town
- South Africa
| | - Nina Kann
- Chemistry and Biochemistry
- Dept. of Chemistry and Chemical Engineering
- Chalmers University of Technology
- SE-41296 Göteborg
- Sweden
| | - Jack D. Evans
- Chimie ParisTech
- PSL University
- CNRS
- Institut de Recherche de Chimie Paris
- 75005 Paris
| | | | - Lars Öhrström
- Chemistry and Biochemistry
- Dept. of Chemistry and Chemical Engineering
- Chalmers University of Technology
- SE-41296 Göteborg
- Sweden
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35
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Roy BC, Debnath S, Chakrabarti K, Paul B, Maji M, Kundu S. ortho-Amino group functionalized 2,2′-bipyridine based Ru(ii) complex catalysed alkylation of secondary alcohols, nitriles and amines using alcohols. Org Chem Front 2018. [DOI: 10.1039/c7qo01061c] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic activity of Ru(ii) complexes in sustainable C–C and C–N bond formation is enhanced by using a functionalized 2,2′-bipyridine ligand.
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Affiliation(s)
| | | | | | - Bhaskar Paul
- Department of Chemistry
- IIT Kanpur
- Kanpur 208016
- India
| | - Milan Maji
- Department of Chemistry
- IIT Kanpur
- Kanpur 208016
- India
| | - Sabuj Kundu
- Department of Chemistry
- IIT Kanpur
- Kanpur 208016
- India
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36
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Maji M, Chakrabarti K, Paul B, Roy BC, Kundu S. Ruthenium(II)-NNN-Pincer-Complex-Catalyzed Reactions Between Various Alcohols and Amines for Sustainable C−N and C−C Bond Formation. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701117] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Milan Maji
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208016 India
| | - Kaushik Chakrabarti
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208016 India
| | - Bhaskar Paul
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208016 India
| | - Bivas Chandra Roy
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208016 India
| | - Sabuj Kundu
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur - 208016 India
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37
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Li H, Riisager A, Saravanamurugan S, Pandey A, Sangwan RS, Yang S, Luque R. Carbon-Increasing Catalytic Strategies for Upgrading Biomass into Energy-Intensive Fuels and Chemicals. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02577] [Citation(s) in RCA: 211] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hu Li
- State-Local Joint Engineering Lab for Comprehensive Utilization of Biomass, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering (Ministry of Education), Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China
| | - Anders Riisager
- Centre
for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Shunmugavel Saravanamurugan
- Laboratory
of Bioproduct Chemistry, Centre of Innovative and Applied Bioprocessing (CIAB), Mohali, Punjab 140306, India
| | - Ashok Pandey
- CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, India
| | - Rajender S. Sangwan
- Laboratory
of Bioproduct Chemistry, Centre of Innovative and Applied Bioprocessing (CIAB), Mohali, Punjab 140306, India
| | - Song Yang
- State-Local Joint Engineering Lab for Comprehensive Utilization of Biomass, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering (Ministry of Education), Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China
| | - Rafael Luque
- Departamento
de Quimica Organica, Universidad de Cordoba, Campus de Rabanales, E-14014, Cordoba, Spain
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38
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Shee S, Paul B, Panja D, Roy BC, Chakrabarti K, Ganguli K, Das A, Das GK, Kundu S. Tandem Cross Coupling Reaction of Alcohols for Sustainable Synthesis of β-Alkylated Secondary Alcohols and Flavan Derivatives. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700722] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Sujan Shee
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
| | - Bhaskar Paul
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
| | - Dibyajyoti Panja
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
| | - Bivas Chandra Roy
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
| | - Kaushik Chakrabarti
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
| | - Kasturi Ganguli
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
| | - Ayan Das
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
| | - Gourab Kanti Das
- Department of Chemistry; Visva Bharati University; Santiniketan, West Bengal 731235 India
| | - Sabuj Kundu
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016 India
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39
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Chakrabarti K, Maji M, Panja D, Paul B, Shee S, Das GK, Kundu S. Utilization of MeOH as a C1 Building Block in Tandem Three-Component Coupling Reaction. Org Lett 2017; 19:4750-4753. [DOI: 10.1021/acs.orglett.7b02105] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kaushik Chakrabarti
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Milan Maji
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Dibyajyoti Panja
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Bhaskar Paul
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Sujan Shee
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Gourab Kanti Das
- Department
of Chemistry, Visva Bharati University, Santiniketan, West Bengal 731235, India
| | - Sabuj Kundu
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
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40
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Paul B, Shee S, Chakrabarti K, Kundu S. Tandem Transformation of Nitro Compounds into N-Methylated Amines: Greener Strategy for the Utilization of Methanol as a Methylating Agent. CHEMSUSCHEM 2017; 10:2370-2374. [PMID: 28422436 DOI: 10.1002/cssc.201700503] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 04/17/2017] [Indexed: 05/24/2023]
Abstract
A simple air- and moisture-stable, highly efficient ruthenium NNN pincer complex is reported for the first time to catalyze the tandem transformation of various aromatic and aliphatic nitro compounds into the corresponding N-methylated amines in up to 98 % yield by using methanol as a green methylating agent. Gram-scale reactions of challenging nitro substrates demonstrated the practical application aspects of this catalytic system. Importantly, the N-methylamine moiety could be smoothly introduced to various complex molecular structures without using any expensive palladium/phosphine/amine-based cross-coupling reactions.
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Affiliation(s)
- Bhaskar Paul
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Sujan Shee
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Kaushik Chakrabarti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
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41
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Freitag F, Irrgang T, Kempe R. Cobalt-Catalyzed Alkylation of Secondary Alcohols with Primary Alcohols via Borrowing Hydrogen/Hydrogen Autotransfer. Chemistry 2017; 23:12110-12113. [PMID: 28452422 DOI: 10.1002/chem.201701211] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Indexed: 01/11/2023]
Abstract
Alcohols are promising sustainable starting materials because they can be obtained from abundant and indigestible biomass. The substitution of expensive noble metals in catalysis by earth abundant 3d metals, such as Mn, Fe, or Co, (nonprecious or base metals) is a related key concept with respect to sustainability. Here, we report on the first cobalt-catalyzed alkylation of secondary alcohols with primary alcohols. Easy-to-synthesize and easy-to-activate PN5 P-pincer-ligand-stabilized Co complexes developed in our laboratory mediate the reaction most efficiently. The catalysis is applicable to a broad substrate scope and proceeds under relatively mild conditions. We have even demonstrated the coupling of a variety of purely aliphatic alcohols with a base or nonprecious metal catalyst. Mechanistic studies indicate that the reaction follows the borrowing hydrogen or hydrogen autotransfer concept.
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Affiliation(s)
- Frederik Freitag
- Anorganische Chemie II-Katalysatordesign, Universität Bayreuth, 95540, Bayreuth, Germany
| | - Torsten Irrgang
- Anorganische Chemie II-Katalysatordesign, Universität Bayreuth, 95540, Bayreuth, Germany
| | - Rhett Kempe
- Anorganische Chemie II-Katalysatordesign, Universität Bayreuth, 95540, Bayreuth, Germany
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42
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Feng TY, Li HX, Young DJ, Lang JP. Ligand-Free RuCl3-Catalyzed Alkylation of Methylazaarenes with Alcohols. J Org Chem 2017; 82:4113-4120. [DOI: 10.1021/acs.joc.6b03095] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Tong-Yu Feng
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, Jiangsu, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People’s Republic of China
| | - Hong-Xi Li
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, Jiangsu, People’s Republic of China
| | - David James Young
- Faculty
of Science and Engineering, University of the Sunshine Coast, Maroochydore
DC, Queensland 4558, Australia
| | - Jian-Ping Lang
- State
and Local Joint Engineering Laboratory for Novel Functional Polymeric
Materials, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou 215123, Jiangsu, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People’s Republic of China
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43
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Chang W, Gong X, Wang S, Xiao LP, Song G. Acceptorless dehydrogenation and dehydrogenative coupling of alcohols catalysed by protic NHC ruthenium complexes. Org Biomol Chem 2017; 15:3466-3471. [DOI: 10.1039/c7ob00542c] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of protic NHC Ru complexes can serve as efficient catalysts for acceptorless dehydrogenative transformations of alcohols.
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Affiliation(s)
- Weihong Chang
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing 100083
- China
| | - Xue Gong
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing 100083
- China
- School of Science
| | - Shuizhong Wang
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing 100083
- China
| | - Ling-Ping Xiao
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing 100083
- China
| | - Guoyong Song
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing 100083
- China
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