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Robles-Henríquez R, Chávez-Vega T, Gallardo-Fuentes S, Lodeiro L, Lühr S, Vilches-Herrera M. Selective reduction of nitroarenes using Ru/C and CaH 2. Org Biomol Chem 2022; 21:187-194. [PMID: 36484425 DOI: 10.1039/d2ob01807a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report an efficient and highly selective method for the reduction of aromatic, heteroaromatic and halonitro compounds using the readily available and cost-effective Ru/C as a catalyst along with unconventional CaH2 as a source of hydride. In most cases the corresponding anilines can be obtained by simple filtration without further purification. The use of 2-MeTHF and the simple operational work-up constitute a valid alternative to previous methodologies.
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Affiliation(s)
- Ramiro Robles-Henríquez
- Chemistry Department, Faculty of Science, University of Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile.
| | - Tomás Chávez-Vega
- Chemistry Department, Faculty of Science, University of Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile.
| | - Sebastián Gallardo-Fuentes
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Avenida Universidad 330, Curauma, Valparaíso, Chile
| | - Lucas Lodeiro
- Chemistry Department, Faculty of Science, University of Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile.
| | - Susan Lühr
- Chemistry Department, Faculty of Science, University of Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile.
| | - Marcelo Vilches-Herrera
- Chemistry Department, Faculty of Science, University of Chile, Las Palmeras 3425, Ñuñoa, Santiago, Chile.
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2
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Feuge N, Namyslo JC, Kaufmann DE, Wilhelm R. Intramolecular Phosphine-Promoted Knoevenagel Based Redox-Reaction. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27154875. [PMID: 35956825 PMCID: PMC9370043 DOI: 10.3390/molecules27154875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 11/20/2022]
Abstract
A Knoevenagel based redox-reaction promoted by intramolecular phosphine sources is presented for the first time. The influence of different diketones, aldehydes, bases and acids was investigated. The effects of different substituents were evaluated based on their electronical influence on the diketone structure. With the obtained results a mechanism is proposed, giving information about transition states formed during the reaction, which can lead to different products. This type of an internal redox transformation with a phosphine oxide moiety remaining in the molecule after the redox reaction represents a new type of reaction.
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3
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Budynina EM, Ivanov KL, Melnikov MY. Reductive Knoevenagel Condensation with the Zn–AcOH System. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1705940] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AbstractAn efficient gram-scale one-pot approach to 2-substituted malonates and related structures is developed, starting from commercially available aldehydes and active methylene compounds. The technique combines Knoevenagel condensation with the reduction of the C=C bond in the resulting activated alkenes with the Zn–AcOH system. The relative ease with which the C=C bond reduction occurs can be traced to the accepting abilities of the substituents in the intermediate arylidene malonates.
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4
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Gui J, Cai X, Chen L, Zhou Y, Zhu W, Jiang Y, Hu M, Chen X, Hu Y, Zhang S. Facile and practical hydrodehalogenations of organic halides enabled by calcium hydride and palladium chloride. Org Chem Front 2021. [DOI: 10.1039/d1qo00758k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
For the first time, calcium hydride and palladium chloride were used to reduce a wide range of organic halides including aromatic bromides, aromatic chlorides, aromatic triflates, aliphatic bromides, aliphatic chlorides and trihalomethyl compounds.
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Affiliation(s)
- Jingjing Gui
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Xin Cai
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Lingyun Chen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Yuxin Zhou
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Wenjing Zhu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Yuanrui Jiang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Min Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Xiaobei Chen
- State Key Laboratory of Bioreactor Engineering, and Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science & Technology, Shanghai, 200237, P.R. China
| | - Yanwei Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Shilei Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
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5
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Muratov K, Kuchuk E, Vellalath S, Afanasyev OI, Moskovets AP, Denisov G, Chusov D. Formal reductive addition of acetonitrile to aldehydes and ketones. Org Biomol Chem 2018; 16:7693-7701. [PMID: 30288533 DOI: 10.1039/c8ob01992d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient and highly productive rhodium-catalyzed method for the synthesis of nitriles employing aldehydes or ketones, methyl cyanoacetate, water and carbon monoxide as starting materials has been developed. Simple rhodium chloride without any ligands can be used. The fine tuning of the substrate can lead to the activity higher than 5000 TON.
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Affiliation(s)
- Karim Muratov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Ekaterina Kuchuk
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Sreekumar Vellalath
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA
| | - Oleg I Afanasyev
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Alexei P Moskovets
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Gleb Denisov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Denis Chusov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia.
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6
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Wang R, Hou M, Xu Z, Tan L, Zhong C, Zhu L. A new red fluorophore with aggregation enhanced emission by an unexpected “One-step” protocol. RSC Adv 2018; 8:18327-18333. [PMID: 35541101 PMCID: PMC9080569 DOI: 10.1039/c8ra00955d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 05/09/2018] [Indexed: 01/20/2023] Open
Abstract
In this work, a triphenylamine-benzothiadiazole-based new fluorophore is obtained from a facile “one-step” protocol. A possible reduction mechanism is proposed, and an amine containing α-H plays a key role in the reduction reaction. The resultant product A1H2 exhibits bright red emission in solid state, with an absolute quantum yield of 44.5%. Aggregation induced emission enhancement of A1H2 is also observed with the increased water fraction in THF-H2O mixture. The nanoparticles of A1H2 reveal good stability and biocompatibility, which are successfully applied in cellular cytoplasm imaging. Compound A1H2 was synthesized via the reductive Knoevenagel alkylation, whose nanoparticles exhibit bright red emission in aqueous solution.![]()
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Affiliation(s)
- Rui Wang
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy
- Faculty of Materials & Energy
- Southwest University
- Chongqing 400715
- P. R. China
| | - Meili Hou
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy
- Faculty of Materials & Energy
- Southwest University
- Chongqing 400715
- P. R. China
| | - Zhigang Xu
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy
- Faculty of Materials & Energy
- Southwest University
- Chongqing 400715
- P. R. China
| | - Luxi Tan
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing 401331
- P. R. China
| | - Cheng Zhong
- Department of Chemistry
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Linna Zhu
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy
- Faculty of Materials & Energy
- Southwest University
- Chongqing 400715
- P. R. China
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Jiang G, Liu M, Fang D, Tan P, Huang M, Zhou T, Jiang Z, Xu Z, Wang Z. A base promoted one pot solvent free version of the Ramachary reductive coupling/alkylation reaction for the synthesis of 2,2-disubstituted ethyl cyanoacetates. RSC Adv 2018; 8:8961-8964. [PMID: 35539882 PMCID: PMC9078616 DOI: 10.1039/c8ra00326b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/19/2018] [Indexed: 12/14/2022] Open
Abstract
An N,N-diisopropylethylamine promoted solvent-free Ramachary reductive coupling/alkylation (RRC/A) reaction for the synthesis of 2,2-disubstituted ethyl cyanoacetates has been developed. A series of 2,2-disubstituted ethyl cyanoacetates were synthesized in one pot by the RRC/A reaction of commercially available aldehydes, ethyl cyanacetates, alkyl halides and Hantzsch ester. A solvent free two step multicomponent reaction has also been developed for the preparation of 2,2-dialkylated malononitriles and 2,2-dialkylated 4-nitrophenyl acetonitriles. All the designed RRC/A products could be easily obtained with good yields by these methods. An N,N-diisopropylethylamine promoted solvent-free Ramachary reductive coupling/alkylation (RRC/A) reaction for the synthesis of 2,2-disubstituted ethyl cyanoacetates has been developed.![]()
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Affiliation(s)
| | - Min Liu
- Department of Chemistry
- Xihua University
- Chengdu
- China
| | - Dongmei Fang
- Chengdu Institute of Biology
- Chinese Academy of Sciences
- Chengdu
- China
| | - Ping Tan
- Department of Chemistry
- Xihua University
- Chengdu
- China
| | - Min Huang
- Department of Chemistry
- Xihua University
- Chengdu
- China
| | - Taiping Zhou
- Department of Chemistry
- Xihua University
- Chengdu
- China
| | - Zhenju Jiang
- Department of Chemistry
- Xihua University
- Chengdu
- China
| | - Zhihong Xu
- Department of Chemistry
- Xihua University
- Chengdu
- China
| | - Zhouyu Wang
- Department of Chemistry
- Xihua University
- Chengdu
- China
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Guyon C, Duclos MC, Métay E, Lemaire M. Reductive N-methylation of amines with calcium hydride and Pd/C catalyst. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.094] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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9
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Di Bussolo V, Princiotto S, Martinelli E, Bordoni V, Crotti P. Dimethyl malonate/LHMDS system as a new protocol for generating methyl formate anion (−COOMe) in the condensed-phase. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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