1
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Fonseca-López D, Ezenarro-Salcedo D, Zapata-Rivera J, Rojas RS, Hurtado JJ. Salophen-type Organocatalysts for the Cycloaddition of CO 2 and Epoxides under Solvent, Halide, and Metal-Free Conditions. ACS OMEGA 2024; 9:19385-19394. [PMID: 38708211 PMCID: PMC11064168 DOI: 10.1021/acsomega.4c00530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/23/2024] [Accepted: 03/26/2024] [Indexed: 05/07/2024]
Abstract
8-Formyl-7-hydroxycoumarin (A) and their derived salophen-type organocatalysts L1, L2, and L3 were used for the synthesis of cyclic carbonates from carbon dioxide (CO2) and epoxides under solvent-, halide-, and metal-free conditions. According to previous optimization tests, L1 and L2 had the best catalytic activity presenting 89 and 92% conversion toward the synthesis of 3-chloropropylene carbonate (2c) using 8 bar CO2, 100 °C at 9 h. Therefore, they were used as organocatalysts to complete the catalytic screening with 11 terminal epoxides (1a-k) exhibiting the highest TOF values of 20 and 22 h-1 using 1c and 1b, respectively. Similarly, they were tested with an internal epoxide, such as cyclohexene oxide (1l) exhibiting 72% conversion, becoming the first salophen organocatalyst to obtain cis-cyclohexane carbonate (2l) in the absence of a cocatalyst. In addition, a reaction mechanism was proposed for the formation of cyclic carbonates based on experimental data and computational techniques; these contributed in establishing a probable role of CO2 pressure along the catalysis and the hydrogen bonds that favor the stabilization of the different intermediates of the reaction.
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Affiliation(s)
- Daniela Fonseca-López
- Laboratorio
de Química Inorgánica, Catálisis y Bioinorgánica.
Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Bogotá 111711, Colombia
| | - David Ezenarro-Salcedo
- Laboratorio
de Química Inorgánica, Catálisis y Bioinorgánica.
Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Bogotá 111711, Colombia
| | - Jhon Zapata-Rivera
- Departamento
de Química, Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali 760042, Colombia
| | - René S. Rojas
- Laboratorio
de Química Inorgánica, Facultad de Química y
de Farmacia, Pontificia Universidad Católica
de Chile, Santiago 6094411, Chile
| | - John J. Hurtado
- Laboratorio
de Química Inorgánica, Catálisis y Bioinorgánica.
Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Bogotá 111711, Colombia
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2
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Li W, Sun B, Zhang L, Mo F. Visible-Light-Induced Transition-Metal-Free Redox-Neutral Carboxylation of Remote Benzylic C(sp 3)-H Bonds via 1,5-Hydrogen Atom Transfer. J Org Chem 2024; 89:521-526. [PMID: 38088918 DOI: 10.1021/acs.joc.3c02250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
The direct carboxylation of the benzylic C-H bonds under mild conditions is of great importance and is quite challenging. Herein, we report an approach for the carboxylation of remote benzylic C(sp3)-H bonds by integrating the redox-neutral visible-light photoredox catalysis and the nitrogen-centered 1,5-hydrogen atom transfer. The chemical transformation progresses via consecutive single electron transfer, 1,5-hydrogen atom transfer, formation of benzylic carbanion, and nucleophilic attack on the CO2 steps, thereby enabling access to the desired carboxylation products with moderate to high yields. We also endeavor to recover the CO2 groups generated in situ intramolecularly to achieve carboxylation under a nitrogen atmosphere, resulting in moderate yields of corresponding carboxylation.
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Affiliation(s)
- Wenke Li
- College of Engineering, Peking University, Beijing 100871, China
| | - Beiqi Sun
- College of Engineering, Peking University, Beijing 100871, China
| | - Lei Zhang
- College of Engineering, Peking University, Beijing 100871, China
| | - Fanyang Mo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
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3
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Yang Y, Fischer NH, Oliveira MT, Hadaf GB, Liu J, Brock-Nannestad T, Diness F, Lee JW. Carbon dioxide enhances sulphur-selective conjugate addition reactions. Org Biomol Chem 2022; 20:4526-4533. [PMID: 35605989 DOI: 10.1039/d2ob00831a] [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
Sulphur-selective conjugate addition reactions play a central role in synthetic chemistry and chemical biology. A general tool for conjugate addition reactions should provide high selectivity in the presence of competing nucleophilic functional groups, namely nitrogen nucleophiles. We report CO2-mediated chemoselective S-Michael addition reactions where CO2 can reversibly control the reaction pHs, thus providing practical reaction conditions. The increased chemoselectivity for sulphur-alkylation products was ascribed to CO2 as a temporary and traceless protecting group for nitrogen nucleophiles, while CO2 efficiently provide higher conversion and selectivity sulphur nucleophiles on peptides and human serum albumin (HSA) with various electrophiles. This method offers simple reaction conditions for cysteine modification reactions when high chemoselectivity is required.
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Affiliation(s)
- Yang Yang
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark.
| | - Niklas Henrik Fischer
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark. .,Nanoscience Center, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark
| | - Maria Teresa Oliveira
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark. .,Nanoscience Center, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark
| | - Gul Barg Hadaf
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark.
| | - Jian Liu
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark.
| | - Theis Brock-Nannestad
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark.
| | - Frederik Diness
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark. .,Nanoscience Center, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark
| | - Ji-Woong Lee
- Department of Chemistry, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark. .,Nanoscience Center, University of Copenhagen Universitetsparken 5, Copenhagen Ø, 2100, Denmark
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4
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Wang H, Li Y, Liu S, Makha M, Bai JF, Li Y. CO 2 -Promoted Direct Acylation of Amines and Phenols by the Activation of Inert Thioacid Salts. CHEMSUSCHEM 2022; 15:e202200227. [PMID: 35289483 DOI: 10.1002/cssc.202200227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/15/2022] [Indexed: 06/14/2023]
Abstract
Herein a carbon dioxide-promoted synthetic approach for the direct amidation between unactivated thioacid salts and amines under mild conditions was developed for a wide range of substrates. The method afforded amides in good to excellent yields under transition-metal-free and activation-reagent-free conditions, in sharp contrast to early methodologies on amide synthesis based on transition-metal catalysis. The method offered a greener and transition metal-free protocol applicable to pharmaceuticals preparations. Phenolic compounds were also found to be suitable acylation substrates with potassium thiosulfide KHS as the only byproduct. Moreover, this approach was applied to amide synthesis of valuable bio-active molecules such as moclobemide, melatonin, and a fungicide. Insights into the reaction mechanism involving carbon dioxide were provided through NMR spectroscopy and computational calculations. A plausible mechanism was proposed that involves weak interactions between carbon dioxide and potassium thioacetate in a dynamic equilibrium state formation of a six-membered ring.
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Affiliation(s)
- Huan Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yudong Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Shaoli Liu
- College of Chemistry and Chemical Engineering Yantai University, Yantai, 264005, P. R. China
| | - Mohamed Makha
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Jian-Fei Bai
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Yuehui Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
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5
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Cauwenbergh R, Goyal V, Maiti R, Natte K, Das S. Challenges and recent advancements in the transformation of CO 2 into carboxylic acids: straightforward assembly with homogeneous 3d metals. Chem Soc Rev 2022; 51:9371-9423. [DOI: 10.1039/d1cs00921d] [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
Transformation of carbon dioxide (CO2) into valuable organic carboxylic acids is essential for maintaining sustainability. In this review, such CO2 thermo-, photo- and electrochemical transformations under 3d-transition metal catalysis are described from 2017 until 2022.
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Affiliation(s)
- Robin Cauwenbergh
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Vishakha Goyal
- Chemical and Material Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun-248005, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Joggers Road, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India
| | - Rakesh Maiti
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Kishore Natte
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy, 502 285, Telangana, India
| | - Shoubhik Das
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
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6
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Tian YM, Wang H, Ritu, König B. Photocatalytic synthesis of tetra-substituted furans promoted by carbon dioxide. Chem Sci 2022; 13:241-246. [PMID: 35059173 PMCID: PMC8694347 DOI: 10.1039/d1sc06403g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 12/06/2021] [Indexed: 11/21/2022] Open
Abstract
A CO2-promoted transition metal-free photocatalytic synthesis of tetra-substituted furan derivatives from 1,3-diketones as the only starting material.
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Affiliation(s)
- Ya-Ming Tian
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93040 Regensburg, Germany
| | - Huaiju Wang
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93040 Regensburg, Germany
| | - Ritu
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93040 Regensburg, Germany
| | - Burkhard König
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93040 Regensburg, Germany
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7
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Yang Y, Liu J, Kamounah FS, Ciancaleoni G, Lee JW. A CO 2-Catalyzed Transamidation Reaction. J Org Chem 2021; 86:16867-16881. [PMID: 34723529 DOI: 10.1021/acs.joc.1c02077] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Transamidation reactions are often mediated by reactive substrates in the presence of overstoichiometric activating reagents and/or transition metal catalysts. Here we report the use of CO2 as a traceless catalyst: in the presence of catalytic amounts of CO2, transamidation reactions were accelerated with primary, secondary, and tertiary amide donors. Various amine nucleophiles including amino acid derivatives were tolerated, showcasing the utility of transamidation in peptide modification and polymer degradation (e.g., Nylon-6,6). In particular, N,O-dimethylhydroxyl amides (Weinreb amides) displayed a distinct reactivity in the CO2-catalyzed transamidation versus a N2 atmosphere. Comparative Hammett studies and kinetic analysis were conducted to elucidate the catalytic activation mechanism of molecular CO2, which was supported by DFT calculations. We attributed the positive effect of CO2 in the transamidation reaction to the stabilization of tetrahedral intermediates by covalent binding to the electrophilic CO2.
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Affiliation(s)
- Yang Yang
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
| | - Jian Liu
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
| | - Fadhil S Kamounah
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
| | - Gianluca Ciancaleoni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy.,CIRCC, via Celso Ulpiani 27, I-70126 Bari, Italy
| | - Ji-Woong Lee
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark.,Nanoscience Center, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
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8
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Liu K, Liu C. One‐Pot Synthesis of Organic Carbonate from Alcohol and Alkyl Bromide under Low CO
2
Pressure. ChemistrySelect 2021. [DOI: 10.1002/slct.202102424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kai Liu
- State Key Laboratory of Fine Chemicals Dalian University of Technology Linggong Road 2 Dalian 116024 China
| | - Chun Liu
- State Key Laboratory of Fine Chemicals Dalian University of Technology Linggong Road 2 Dalian 116024 China
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9
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Petersen AR, Juhl M, Petrovic A, Lee J. CO
2
‐Mediated Non‐Destructive Cyanide Wastewater Treatment. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Allan R. Petersen
- Department of Chemistry University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Martin Juhl
- Department of Chemistry University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Aleksa Petrovic
- Department of Chemistry University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Ji‐Woong Lee
- Department of Chemistry University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
- Nanoscience Center University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
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10
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Budnyak TM, Onwumere J, Pylypchuk IV, Jaworski A, Chen J, Rokicińska A, Lindström ME, Kuśtrowski P, Sevastyanova O, Slabon A. LignoPhot: Conversion of hydrolysis lignin into the photoactive hybrid lignin/Bi 4O 5Br 2/BiOBr composite for simultaneous dyes oxidation and Co 2+ and Ni 2+ recycling. CHEMOSPHERE 2021; 279:130538. [PMID: 33894514 DOI: 10.1016/j.chemosphere.2021.130538] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/31/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
Valorization of lignin is still an open question and lignin has therefore remained an underutilized biomaterial. This situation is even more pronounced for hydrolysis lignin, which is characterized by a highly condensed and excessively cross-linked structure. We demonstrate the synthesis of photoactive lignin/Bi4O5Br2/BiOBr bio-inorganic composites consisting of a lignin substrate that is coated by semiconducting nanosheets. The XPS analysis reveals that growing these nanosheets on lignin instead on cellulose prevents the formation of Bi5+ ions at the surface region, yielding thus a modified heterojunction Bi4O5Br2/BiOBr. The material contains 18.9% of Bi4O5Br2/BiOBr and is effective for the photocatalytic degradation of cationic methylene blue (MB) and zwitterionic rhodamine B (RhB) dyes under light irradiation. Lignin/Bi4O5Br2/BiOBr decreases the dye concentration from 80 mg L-1 to 12.3 mg L-1 for RhB (85%) and from 80 mg L-1 to 4.4 mg L-1 for MB (95%). Complementary to the dye degradation, the lignin as a main component of the composite, was found to be efficient and rapid biosorbent for nickel, lead, and cobalt ions. The low cost, stability and ability to simultaneously photo-oxidize organic dyes and adsorb metal ions, make the photoactive lignin/Bi4O5Br2/BiOBr composite a prospective material for textile wastewaters remediation and metal ions recycling.
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Affiliation(s)
- Tetyana M Budnyak
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden
| | - Joy Onwumere
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden
| | - Ievgen V Pylypchuk
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Aleksander Jaworski
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden
| | - Jianhong Chen
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden
| | - Anna Rokicińska
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden
| | - Mikael E Lindström
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Piotr Kuśtrowski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland
| | - Olena Sevastyanova
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland; Wallenberg Wood Science Center (WWSC), Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Adam Slabon
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden.
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11
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Catalyst-free hierarchical reduction of CO2 with BH3N(C2H5)3 for selective N-methylation and N-formylation of amines. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101590] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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12
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Sahoo PK, Zhang Y, Das S. CO 2-Promoted Reactions: An Emerging Concept for the Synthesis of Fine Chemicals and Pharmaceuticals. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05681] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Prakash Kumar Sahoo
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Yu Zhang
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Shoubhik Das
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
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13
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Juhl M, Petersen AR, Lee JW. CO 2 -Enabled Cyanohydrin Synthesis and Facile Iterative Homologation Reactions*. Chemistry 2021; 27:228-232. [PMID: 32812672 DOI: 10.1002/chem.202003623] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/18/2020] [Indexed: 01/06/2023]
Abstract
Thermodynamic and kinetic control of a chemical process is the key to access desired products and states. Changes are made when a desired product is not accessible; one may manipulate the reaction with additional reagents, catalysts and/or protecting groups. Here we report the use of carbon dioxide to accelerate cyanohydrin synthesis under neutral conditions with an insoluble cyanide source (KCN) without generating toxic HCN. Under inert atmosphere, the reaction is essentially not operative due to the unfavored equilibrium. The utility of CO2 -mediated selective cyanohydrin synthesis was further showcased by broadening Kiliani-Fischer synthesis under neutral conditions. This protocol offers an easy access to a variety of polyols, cyanohydrins, linear alkylnitriles, by simply starting from alkyl- and arylaldehydes, KCN and an atmospheric pressure of CO2 .
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Affiliation(s)
- Martin Juhl
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Allan R Petersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Ji-Woong Lee
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
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14
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Huang YK, Zhang WZ, Zhang K, Wang WL, Lu XB. Carbon dioxide-promoted palladium-catalyzed dehydration of primary allylic alcohols: access to substituted 1,3-dienes. Org Chem Front 2021. [DOI: 10.1039/d0qo01465f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A carbon dioxide promoted dehydration reaction of primary allylic alcohols gives synthetically important substituted 1,3-dienes in good yields under milder conditions compared with the reaction using a heterogeneous catalyst or carbon monoxide.
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Affiliation(s)
- Yan-Kai Huang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
| | - Wen-Zhen Zhang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
| | - Ke Zhang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
| | - Wen-Le Wang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
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15
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Wang P, He Q, Zhang H, Sun Q, Cheng Y, Gan T, He X, Ji H. N-formylation of amines using phenylsilane and CO2 over ZnO catalyst under mild condition. CATAL COMMUN 2021. [DOI: 10.1016/j.catcom.2020.106195] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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16
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Abstract
Carbon dioxide is an intrinsically stable molecule; however, it can readily react with various nucleophilic reagents. In the presence of a cyanide source, CO2 was proven to be useful to promote addition reactions. Here we report the use of CO2 to facilitate 1,4-conjugate cyanide addition reaction to chalcones to generate organonitriles. Nitriles are key component in organic synthesis due to their utility in numerous functional group transformation, however, conjugation addition of cyanide has been a challenge in this substrate class due to side reactions. To mitigate this, we employed simple ammonium and metal cyanide sources as nucleophiles under carbon dioxide atmosphere where high selectivity toward the desired product was obtained. The presented reaction is not feasible under inert atmosphere, which highlights the important role of CO2, as a Lewis and Brøndsted acidic catalyst. Further derivatization of organonitriles compounds were performed to showcase the utility of the reaction, while an unprecedented dimerization reaction was identified and characterized, affording a cyclopentanone scaffold.
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17
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Schilling W, Das S. Transition Metal-Free Synthesis of Carbamates Using CO 2 as the Carbon Source. CHEMSUSCHEM 2020; 13:6246-6258. [PMID: 33107690 DOI: 10.1002/cssc.202002073] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/09/2020] [Indexed: 06/11/2023]
Abstract
Utilization of carbon dioxide as a C1 synthon is highly attractive for the synthesis of valuable chemicals. However, activation of CO2 is highly challenging, owing to its thermodynamic stability and kinetic inertness. With this in mind, several strategies have been developed for the generation of carbon-heteroatom bonds. Among these, formation of C-N bonds is highly attractive, especially, when carbamates can be synthesized directly from CO2 . This Minireview focuses on transition metal-free approaches for the fixation of CO2 to generate carbamates for the production of fine chemicals and pharmaceuticals. Within the past decade, transition metal-free approaches have gained increasing attention, but traditional reviews have rarely focused on these approaches. Direct comparisons between such methods have been even more scarce. This Minireview seeks to address this discrepancy.
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Affiliation(s)
- Waldemar Schilling
- Institute for Biomolecular and Organic Chemistry, Georg-August-Universität Göttingen, Tammanstraße 2, 37077, Göttingen, Germany
| | - Shoubhik Das
- ORSY division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
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18
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Liu J, Kragh RR, Kamounah FS, Lee JW. Extended Pummerer fragmentation mediated by carbon dioxide and cyanide. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Petersen AR, Lauridsen JMV, Lee J. CO
2
‐Controlled Reductive Amination Reactions with NaBH
4. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001408] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Allan R. Petersen
- Department of Chemistry Nano‐Science Center University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | | | - Ji‐Woong Lee
- Department of Chemistry Nano‐Science Center University of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
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CO2-Catalyzed Efficient Dehydrogenation of Amines with Detailed Mechanistic and Kinetic Studies. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03059] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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