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Faraz S, Kumar M, Taleb Khan A, Ponneganti S, Radhakrishnanand P. Metal- and Solvent-free Synthesis of 2-Benzyl-3-arylquinoline Using a Pseudo-three-component Reaction. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Su LL, Zheng YW, Wang WG, Chen B, Wei XZ, Wu LZ, Tung CH. Photocatalytic Synthesis of Quinolines via Povarov Reaction under Oxidant-Free Conditions. Org Lett 2022; 24:1180-1185. [PMID: 35089722 DOI: 10.1021/acs.orglett.1c04287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe here an approach for synthesizing quinolines either from N-alkyl anilines or from anilines and aldehydes. A dual-catalyst system consisting of a photocatalyst and a proton reduction cocatalyst is employed. Without the use of any sacrificial oxidant and under extremely mild conditions, the reactions afford quinolines in excellent yields and produce H2 as a byproduct.
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Affiliation(s)
- Long-Long Su
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China.,Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yi-Wen Zheng
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Wen-Guang Wang
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiang-Zhu Wei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China.,Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Popov KK, Campbell JLP, Kysilka O, Hošek J, Davies CD, Pour M, Kočovský P. Reductive Amination Revisited: Reduction of Aldimines with Trichlorosilane Catalyzed by Dimethylformamide─Functional Group Tolerance, Scope, and Limitations. J Org Chem 2021; 87:920-943. [PMID: 34841878 DOI: 10.1021/acs.joc.1c01561] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aldimines, generated in situ from aliphatic, aromatic, and heteroaromatic aldehydes and aliphatic, aromatic, and heteroaromatic primary or secondary amines, can be reduced with trichlorosilane in the presence of dimethylformamide (DMF) as an organocatalyst (≤10 mol %) in toluene or CH2Cl2 at room temperature. The reduction tolerates ketone carbonyls, esters, amides, nitriles, sulfones, sulfonamides, NO2, SF5, and CF3 groups, boronic esters, azides, phosphine oxides, C═C and C≡C bonds, and ferrocenyl nucleus, but sulfoxides and N-oxides are reduced. α,β-Unsaturated aldimines undergo 1,2-reduction only, leaving the C═C bond intact. N-Monoalkylation of primary amines is attained with a 1:1 aldehyde to amine ratio, whereas excess of the aldehyde (≥2:1) allows second alkylation, giving rise to tertiary amines. Reductive N-alkylation of α-amino acids proceeds without racemization; the resulting products, containing a C≡C bond or N3 group, are suitable for click chemistry. This reaction thus offers advantages over the traditional methods (borohydride reduction or catalytic hydrogenation) in terms of efficiency and chemoselectivity. Solubility of some of the reacting partners appears to be the only limitation. The byproducts generated by the workup with aqueous NaHCO3 (i.e., NaCl and silica) are environmentally benign. As a greener alternative, DMA can be employed as a catalyst instead of DMF.
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Affiliation(s)
- Kirill K Popov
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Joanna L P Campbell
- Syngenta, Grangemouth Manufacturing Centre, Earl's Road, Grangemouth FK3 8XG, U.K
| | - Ondřej Kysilka
- Trelleborg Bohemia, Akademika Bedrny 531/8a, Věkoše, 500 03 Hradec Králové Czech Republic
| | - Jan Hošek
- Farmak, Na vlčinci 16/3, Klášterní Hradisko, 77900 Olomouc, Czech Republic
| | | | - Milan Pour
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
| | - Pavel Kočovský
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43 Prague 2, Czech Republic.,Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic.,Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo 2, 166 10 Prague 6, Czech Republic
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Scott DE, Aloisio MD, Rodriguez JF, Morimoto M, Hamilton RJ, Brown O, Tykwinski RR, Stryker JM. Optimizing the Iodide/Iodonium/O
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Oxidation Cycle Enhances the Scope, Selectivity, and Yields of Hydroiodic Acid‐Catalyzed Multicomponent Cyclocondensation Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100657] [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)
- David E. Scott
- Department of Chemistry University of Alberta Edmonton AB, T6G 2G2 Canada
| | - Mark D. Aloisio
- Department of Chemistry University of Alberta Edmonton AB, T6G 2G2 Canada
| | - Jose F. Rodriguez
- Department of Chemistry University of Alberta Edmonton AB, T6G 2G2 Canada
| | - Masato Morimoto
- Energy Process Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 16-1 Onogawa Tsukuba Ibaraki 305-8569 Japan
| | - Robin J. Hamilton
- Department of Chemistry University of Alberta Edmonton AB, T6G 2G2 Canada
| | - Orain Brown
- Department of Chemistry University of Alberta Edmonton AB, T6G 2G2 Canada
| | - Rik R. Tykwinski
- Department of Chemistry University of Alberta Edmonton AB, T6G 2G2 Canada
| | - Jeffrey M. Stryker
- Department of Chemistry University of Alberta Edmonton AB, T6G 2G2 Canada
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Zhang M, Ding Y, Xiong B, Wang T, Yan F, Wang X. Expedient N-Arylation for the Synthesis of 2-Arylamino-3-cyanopyridines Using Ionic Copper(I) Complex as a Catalyst. HETEROCYCLES 2012. [DOI: 10.3987/com-12-12461] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Zhang M, Wang T, Xiong B, Yan F, Wang X, Ding Y, Song Q. Efficient Synthesis of 2,4-Diarylquinolines via Fe(III) Trifluoroacetate Catalyzed Three-Component Reactions under Solvent-Free Conditions. HETEROCYCLES 2012. [DOI: 10.3987/com-12-12433] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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