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Gao Y, Wang M, Sun J, Zhao XJ, He Y. Electrochemical-induced solvent-tuned selective C(sp 3)-H bond activation towards the synthesis of C3-functionalized chromone derivatives. Chem Commun (Camb) 2024; 60:5050-5053. [PMID: 38634308 DOI: 10.1039/d4cc00919c] [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
An unprecedented solvent-tuned electrochemical method for selective C(sp3)-H bond activation towards the synthesis of C3 functionalized chromone derivatives has been developed. This electrosynthesis protocol provides an efficient and green way to access various C3-functionalized chromones by avoiding traditionally employed transition metals and high temperatures. The swappable chemoselectivity was controlled mainly by altering the solvent and the current. A plausible reaction mechanism has been proposed with the help of radical capture and cyclic voltammetry experiments.
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Affiliation(s)
- Ying Gao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China.
| | - Mingxu Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China.
| | - Jingxian Sun
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China.
| | - Xiao-Jing Zhao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China.
| | - Yonghui He
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education; Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission, School of Ethnic Medicine, Yunnan Minzu University, Kunming, 650500, China.
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Li Z, Jorn R, Samonte PRV, Mao J, Sivey JD, Pignatello JJ, Xu W. Surface-catalyzed hydrolysis by pyrogenic carbonaceous matter and model polymers: An experimental and computational study on functional group and pore characteristics. APPLIED CATALYSIS. B, ENVIRONMENTAL 2022; 319:121877. [PMID: 37846345 PMCID: PMC10578355 DOI: 10.1016/j.apcatb.2022.121877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
We employed a polymer network to understand what properties of pyrogenic carbonaceous matter (PCM; e.g., activated carbon) confer its reactivity, which we hereinafter referred to as PCM-like polymers (PLP). This approach allows us to delineate the role of functional groups and micropore characteristics using 2,4,6-trinitrotoluene (TNT) as a model contaminant. Six PLP were synthesized via cross-coupling chemistry with specific functionality (-OH, -NH2, -N(CH3)2, or -N ( CH 3 ) 3 + ) and pore characteristics (mesopore, micropore). Results suggest that PCM functionality catalyzed the reaction by: (1) serving as a weak base (-OH, -NH2) to attack TNT, or (2) accumulating OH- near PCM surfaces (-N ( CH 3 ) 3 + ). Additionally, TNT hydrolysis rates, pH and co-ion effects, and products were monitored. Microporous PLP accelerated TNT decay compared to its mesoporous counterpart, as further supported by molecular dynamics modeling results. We also demonstrated that quaternary ammonium-modified activated carbon enhanced TNT hydrolysis. These findings have broad implications for pollutant abatement and catalyst design.
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Affiliation(s)
- Zhao Li
- Department of Civil and Environmental Engineering, Villanova University, Villanova, PA 19085, USA
| | - Ryan Jorn
- Department of Chemistry, Villanova University, Villanova, PA 19085, USA
| | - Pamela Rose V. Samonte
- Department of Civil and Environmental Engineering, Villanova University, Villanova, PA 19085, USA
| | - Jingdong Mao
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA
| | - John D. Sivey
- Department of Chemistry, Towson University, Towson, MD 21252, USA
| | - Joseph J. Pignatello
- Department of Environmental Sciences, The Connecticut Agricultural Experiment Station, 123 Huntington St., New Haven, CT 06511, USA
| | - Wenqing Xu
- Department of Civil and Environmental Engineering, Villanova University, Villanova, PA 19085, USA
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Xu S, Zhang X, Xiong W, Li P, Ma W, Hu X, Wu Y. Aerobic oxidation of aldehydes to acids in water with cyclic (alkyl)(amino)carbene copper under mild conditions. Chem Commun (Camb) 2021; 58:2132-2135. [PMID: 34704994 DOI: 10.1039/d1cc04812k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, cyclic (alkyl)(amino)carbene copper ((CAAC)Cu) catalyzed aerobic oxidation of aldehydes in water at room temperature has been reported. Good to excellent yields were obtained using different substrates. A possible reaction mechanism was proposed, in which (CAAC)Cu dioxygen activates the C-H bond of aldehyde with a low barrier of 10.6 kcal mol-1.
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Affiliation(s)
- Songbo Xu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Shandong Kanbo Biochemical Technology Co., Ltd, Dongying, 257400, P. R. China
| | - Xiaomin Zhang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Yuxiu Postdoctoral Institute, Nanjing University, Nanjing 210023, P. R. China
| | - Wenjie Xiong
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
| | - Ping Li
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
| | - Wentao Ma
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
| | - Xingbang Hu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Yuxiu Postdoctoral Institute, Nanjing University, Nanjing 210023, P. R. China
| | - Youting Wu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Yuxiu Postdoctoral Institute, Nanjing University, Nanjing 210023, P. R. China
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Ranjbari MA, Tavakol H, Manoukian M. Regioselective and solvent-free arylation of β-nitrostyrenes with mono- and dialkyl anilines. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04294-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhai G, Liu X, Ma W, Wang G, Yang L, Li S, Wu Y, Hu X. B(C 6 F 5 ) 3 -Catalyzed Tandem Friedel-Crafts and C-H/C-O Coupling Reactions of Dialkylanilines. Chem Asian J 2020; 15:3082-3086. [PMID: 32770729 DOI: 10.1002/asia.202000763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/30/2020] [Indexed: 11/11/2022]
Abstract
Tandem Friedel-Crafts (FC) and C-H/C-O coupling reactions catalyzed by tris(pentafluorophenyl) borane (B(C6 F5 )3 ) were achieved without using any other additive in the absence of solvent. This process can be used for the reactions between a series of dialkylanilines and vinyl ethers with good isolated yields of bis(4-dialkylaminophenyl) compounds. Based on combined theoretical and experimental studies, the possible reaction mechanism was proposed. B(C6 F5 )3 can activate the C=C and C-O bond for FC and C-H/C-O coupling reactions respectively. The FC reaction is slow, which is followed by a fast C-H/C-O coupling.
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Affiliation(s)
- Gaowen Zhai
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Xueting Liu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Wentao Ma
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Guoqiang Wang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Liu Yang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Shuhua Li
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Youting Wu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Xingbang Hu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
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Ma W, Zhai G, Hu X, Wu Y. Experimental and theoretical study on the cyclic(alkyl)(amino)carbene-copper catalyzed Friedel-Crafts reaction of N,N-dialkylanilines with styrenes. Org Biomol Chem 2020; 18:4272-4275. [PMID: 32441731 DOI: 10.1039/c9ob02734c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Friedel-Crafts reaction of alkalinous substrates is challenging because of the coordination between amines and traditional acid catalysts. Based on theoretical research, we designed a catalytic process for the Friedel-Crafts reactions of N,N-dialkylanilines in the presence of CAAC-CuCl [CAAC = cyclic(alkyl)(amino)carbene] and KB(C6F5)4. Experimental results show that the catalytic system is suitable for a series of N,N-dialkylanilines and styrenes with good to excellent yields of para-selectivity products. The results are comparable to those obtained in carbene-gold catalyzed processes.
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Affiliation(s)
- Wentao Ma
- School of Chemistry and Chemical Engineering, Separation Engineering Research Center, Nanjing University, Nanjing 210093, P. R. China.
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7
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Affiliation(s)
- Ignacio Colomer
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Francisco Tomás y Valiente, 7, 28049 Madrid, Spain
- IMDEA Nanociencia, Faraday 9, Campus UAM, 28049 Madrid, Spain
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Yang M, Wang G, Zou J, Li S. Mechanistic Insight Into the AuCN Catalyzed Annulation Reaction of Salicylaldehyde and Aryl Acetylene: Cyanide Ion Promoted Umpolung Hydroacylation/Intramolecular Oxa-Michael Addition Mechanism. Front Chem 2019; 7:557. [PMID: 31448263 PMCID: PMC6691126 DOI: 10.3389/fchem.2019.00557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 07/22/2019] [Indexed: 01/19/2023] Open
Abstract
The detailed mechanism of the AuCN-catalyzed annulation of salicylaldehyde (SA) and phenyl acetylene leading to isoflavanone-type complexes has been investigated via density functional theory (DFT) calculations. Reaction pathways and possible stationary points are obtained with the combined molecular dynamics and coordinate driving (MD/CD) method. Our calculations reveal that the cyanide ion promoted umpolung hydroacylation/intramolecular oxa-Michael addition mechanism is more favorable than the Au(I)/Au(III) redox mechanism proposed previously. In the umpolung mechanism, the hydroxyl of SA is found to strongly stabilize the cyanide ion involved intermediates and transition states via hydrogen bond interactions, while the Au(I) ion always acts as a counter cation. The overall reaction is exergonic by 41.8 kcal/mol. The hydroacylation of phenyl acetylene is the rate-determining step and responsible for the regioselectivity with a free energy barrier of 27.3 kcal/mol. These calculated results are in qualitative accord with the experimental findings.
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Affiliation(s)
- Manyi Yang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, China
| | - Jingxiang Zou
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, China
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, China
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