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Cui B, Zheng Y, Sun H, Shang H, Du M, Shang Y, Yavuz CT. Catalytic enantioselective intramolecular hydroamination of alkenes using chiral aprotic cyclic urea ligand on manganese (II). Nat Commun 2024; 15:6647. [PMID: 39103345 DOI: 10.1038/s41467-024-50757-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 07/18/2024] [Indexed: 08/07/2024] Open
Abstract
Asymmetric catalysis for enantioselective intramolecular hydroamination of alkenes is a critical method in the construction of enantioenriched nitrogen-containing rings, often prevalent in biologically active compounds and natural products. Herein, we demonstrate a facile enantioselective intramolecular hydroamination of alkenes for the synthesis of chiral pyrrolidine, piperidine, and indoline moieties, using a manganese (II) chiral aprotic cyclic urea catalyst. The cyclic ligand hinders the inversion of the N atom of the urea and effectively discriminate between the enantiomers of substrates. High-resolution mass spectrometry, deuterium labeling experiments, and molecular orbital energy analysis clearly reveal the intermediates and mechanism of the transformation. As a key step, oxygen coordination by chiral aprotic urea presents a robust control over the asymmetric intra-HA reaction through the involvement of a convergent assembly of two vital intermediates (Mn-N and C-Mn-Br), providing access to chiral cyclic amine systems in high yields with excellent enantioselectivity.
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Affiliation(s)
- Bin Cui
- Manganese Catalysis and Asymmetric Synthesis Laboratory, College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, P. R. China
| | - Yuting Zheng
- Manganese Catalysis and Asymmetric Synthesis Laboratory, College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, P. R. China
| | - Hui Sun
- Manganese Catalysis and Asymmetric Synthesis Laboratory, College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, P. R. China.
| | - Huijian Shang
- Manganese Catalysis and Asymmetric Synthesis Laboratory, College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, P. R. China
| | - Man Du
- Manganese Catalysis and Asymmetric Synthesis Laboratory, College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, P. R. China
| | - Yuxuan Shang
- Oxide & Organic Nanomaterials for Energy & Environment Laboratory, Physical Science & Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
| | - Cafer T Yavuz
- Oxide & Organic Nanomaterials for Energy & Environment Laboratory, Physical Science & Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
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Behrsing T, Blair VL, Jaroschik F, Deacon GB, Junk PC. Rare Earths-The Answer to Everything. Molecules 2024; 29:688. [PMID: 38338432 PMCID: PMC10856286 DOI: 10.3390/molecules29030688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 01/24/2024] [Accepted: 01/27/2024] [Indexed: 02/12/2024] Open
Abstract
Rare earths, scandium, yttrium, and the fifteen lanthanoids from lanthanum to lutetium, are classified as critical metals because of their ubiquity in daily life. They are present in magnets in cars, especially electric cars; green electricity generating systems and computers; in steel manufacturing; in glass and light emission materials especially for safety lighting and lasers; in exhaust emission catalysts and supports; catalysts in artificial rubber production; in agriculture and animal husbandry; in health and especially cancer diagnosis and treatment; and in a variety of materials and electronic products essential to modern living. They have the potential to replace toxic chromates for corrosion inhibition, in magnetic refrigeration, a variety of new materials, and their role in agriculture may expand. This review examines their role in sustainability, the environment, recycling, corrosion inhibition, crop production, animal feedstocks, catalysis, health, and materials, as well as considering future uses.
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Affiliation(s)
- Thomas Behrsing
- School of Chemistry, Monash University, Melbourne, VIC 3800, Australia; (T.B.); (V.L.B.); (G.B.D.)
| | - Victoria L. Blair
- School of Chemistry, Monash University, Melbourne, VIC 3800, Australia; (T.B.); (V.L.B.); (G.B.D.)
| | | | - Glen B. Deacon
- School of Chemistry, Monash University, Melbourne, VIC 3800, Australia; (T.B.); (V.L.B.); (G.B.D.)
| | - Peter C. Junk
- College of Science & Engineering, James Cook University, Townsville, QLD 4811, Australia
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3
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Miao H, Guan M, Xiong T, Zhang G, Zhang Q. Cobalt-Catalyzed Enantioselective Hydroamination of Arylalkenes with Secondary Amines. Angew Chem Int Ed Engl 2023; 62:e202213913. [PMID: 36342476 DOI: 10.1002/anie.202213913] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Indexed: 11/09/2022]
Abstract
Catalytic asymmetric hydroamination of alkenes with Lewis basic amines is of great interest but remains a challenge in synthetic chemistry. Here, we developed a Co-catalyzed asymmetric hydroamination of arylalkenes directly using commercially accessible secondary amines. This process enables the efficient access to valuable α-chiral tertiary amines in good to excellent yields and enantioselectivities. Mechanistic studies suggest that the reaction includes a CoH-mediated hydrogen atom transfer (MHAT) with arylalkenes, followed by a pivotal catalyst controlled SN 2-like pathway between in situ generated electrophilic cationic alkylcobalt(IV) species and free amines. This radical-polar crossover strategy not only provides a straightforward and alternative approach for the synthesis of enantioenriched α-tertiary amines, but also underpins the substantial opportunities in developing asymmetric radical functionalization of alkenes with various free nucleophiles in oxidative MHAT catalysis.
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Affiliation(s)
- Huanran Miao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Meihui Guan
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Tao Xiong
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Ge Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, 130024, Changchun, China
| | - Qian Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, 130024, Changchun, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, 200032, Shanghai, China
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4
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Wang HD, Jiang L, Fan HJ. Silylium ion migration dominated hydroamidation of siloxy-alkynes. Commun Chem 2022; 5:133. [PMID: 36697660 PMCID: PMC9814853 DOI: 10.1038/s42004-022-00751-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 10/06/2022] [Indexed: 01/28/2023] Open
Abstract
The mechanism of silver-catalyzed hydroamidation of siloxy-alkynes reaction remains controversial. Using density functional theory (DFT), we revealed that the reaction takes place through a silylium ion migration mediated hydroamination (SMH) pathway. The SMH pathway goes through two steps, the first step is Ag+ promoted proton and silylium ion exchange between siloxy-alkynes and amide, leading to ketene and silyl-imines, the second step is Ag+ catalyzed nucleophilic addition between ketene and silyl-imines, following with a silylium ion migration afford the final product. In this reaction, Ag+ activates the siloxy-alkyne into silylium ion (TIPS+) and silver-ketene through the p-π conjugate effect, the silylium ion then catalyzes the reaction. According to our calculation, the scopes of alkynes in this reaction may be extended to silyl-substituted ynamines or silyl-substituted ynamides. The scopes of amide may be extended into the p-π conjugate system such as diazoles, diazepines, etc. Our calculations also reveal a concise way to construct enamides through Ag+ catalyzed nucleophilic addition between substituted-ketenes and silyl-substituted p-π conjugate system.
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Affiliation(s)
- Heng-Ding Wang
- grid.9227.e0000000119573309State Key Laboratory of Molecular Reaction Dynamics, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, 100864 Beijing, China
| | - Ling Jiang
- grid.9227.e0000000119573309State Key Laboratory of Molecular Reaction Dynamics, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, 100864 Beijing, China
| | - Hong-Jun Fan
- grid.9227.e0000000119573309State Key Laboratory of Molecular Reaction Dynamics, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, 100864 Beijing, China
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5
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Gruzdev DA, Vakarov SA, Korolyova MA, Bartashevich EV, Tumashov AA, Chulakov EN, Ezhikova MA, Kodess MI, Levit GL, Krasnov VP. Acylative kinetic resolution of racemic methyl-substituted cyclic alkylamines with 2,5-dioxopyrrolidin-1-yl ( R)-2-phenoxypropanoate. Org Biomol Chem 2022; 20:862-869. [PMID: 35006228 DOI: 10.1039/d1ob02099d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The diastereoselective acylation of a number of racemic methyl-substituted cyclic alkylamines with active esters of 2-phenoxypropanoic acid was studied in detail. The ester of (R)-2-phenoxypropanoic acid and N-hydroxysuccinimide was found to be the most selective agent. The highest stereoselectivity was observed in the kinetic resolution of racemic 2-methylpiperidine in toluene at -40 °C (selectivity factor s = 73) with the predominant formation of (R,R)-amide (93.7% de). To explain the observed stereoselectivity, DFT modelling of the transition states in the reactions of the title acylating agent with 2-methylpiperidine and 2-methylpyrrolidine was performed. The calculated values were in good agreement with experimental data. It has been demonstrated that the acylation proceeds via a concerted mechanism, in which the addition of an amine occurs simultaneously with the elimination of the hydroxysuccinimide fragment. The high stereoselectivity of the (R,R)-amide formation is largely ensured by the lower steric hindrances in the transition states as compared to the formation of (R,S)-amide.
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Affiliation(s)
- Dmitry A Gruzdev
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Sergey A Vakarov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Marina A Korolyova
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Ekaterina V Bartashevich
- South Ural State University (National Research University), 76 Lenina Ave., Chelyabinsk 454080, Russia
| | - Andrey A Tumashov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Evgeny N Chulakov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Marina A Ezhikova
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Mikhail I Kodess
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Galina L Levit
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
| | - Victor P Krasnov
- Postovsky Institute of Organic Synthesis of RAS (Ural Branch), 22/20 S. Kovalevskoy St, Ekaterinburg 620108, Russia.
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Abstract
This review highlights the hydroelementation reactions of conjugated and separated diynes, which depending on the process conditions, catalytic system, as well as the type of reagents, leads to the formation of various products: enynes, dienes, allenes, polymers, or cyclic compounds. The presence of two triple bonds in the diyne structure makes these compounds important reagents but selective product formation is often difficult owing to problems associated with maintaining appropriate reaction regio- and stereoselectivity. Herein we review this topic to gain knowledge on the reactivity of diynes and to systematise the range of information relating to their use in hydroelementation reactions. The review is divided according to the addition of the E-H (E = Mg, B, Al, Si, Ge, Sn, N, P, O, S, Se, Te) bond to the triple bond(s) in the diyne, as well as to the type of the reagent used, and the product formed. Not only are the hydroelementation reactions comprehensively discussed, but the synthetic potential of the obtained products is also presented. The majority of published research is included within this review, illustrating the potential as well as limitations of these processes, with the intent to showcase the power of these transformations and the obtained products in synthesis and materials chemistry.
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Affiliation(s)
- Jędrzej Walkowiak
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan.
| | - Jakub Szyling
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan. .,Adam Mickiewicz University in Poznan, Faculty of Chemistry, Uniwersytetu Poznanskiego 8, 61-614, Poznan, Poland
| | - Adrian Franczyk
- Adam Mickiewicz University in Poznan, Center for Advanced Technology, Uniwersytetu Poznanskiego 10, 61-614, Poznan.
| | - Rebecca L Melen
- Cardiff Catalysis Institute, Cardiff University, School of Chemistry, Park Place, Main Building, Cardiff CF10 3AT, Cymru/Wales, UK.
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7
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Hidasová D, Pohl R, Císařová I, Jahn U. A Diastereoselective Catalytic Approach to Pentasubstituted Pyrrolidines by Tandem Anionic‐Radical Cross‐Over Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Denisa Hidasová
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Ullrich Jahn
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
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8
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Zhou Y, Xu X, Sun H, Tao G, Chang XY, Xing X, Chen B, Xu C. Development of highly efficient platinum catalysts for hydroalkoxylation and hydroamination of unactivated alkenes. Nat Commun 2021; 12:1953. [PMID: 33782394 PMCID: PMC8007598 DOI: 10.1038/s41467-021-22287-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 02/26/2021] [Indexed: 11/09/2022] Open
Abstract
Hydrofunctionalization, the direct addition of an X-H (e.g., X=O, N) bond across an alkene, is a desirable strategy to make heterocycles that are important structural components of naturally occurring molecules. Described here is the design and discovery of "donor-acceptor"-type platinum catalysts that are highly effective in both hydroalkoxylation and hydroamination of unactivated alkenes over a broad range of substrates under mild conditions. A number of alkene substitution patterns are accommodated, including tri-substituted, 1,1-disubstituted, (E)-disubstituted, (Z)-disubstituted and even mono-substituted double bonds. Detailed mechanistic investigations suggest a plausible pathway that includes an unexpected dissociation/re-association of the electron-deficient ligand to form an alkene-bound "donor-acceptor"-type intermediate. These mechanistic studies help understand the origins of the high reactivity exhibited by the catalytic system, and provide a foundation for the rational design of chiral catalysts towards asymmetric hydrofunctionalization reactions.
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Affiliation(s)
- Yali Zhou
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xingjun Xu
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Hongwei Sun
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Guanyu Tao
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xiao-Yong Chang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xiangyou Xing
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, China.
| | - Bo Chen
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, Guangdong, China.
| | - Chen Xu
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, Guangdong, China.
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Yang ZP, Freas DJ, Fu GC. The Asymmetric Synthesis of Amines via Nickel-Catalyzed Enantioconvergent Substitution Reactions. J Am Chem Soc 2021; 143:2930-2937. [PMID: 33567209 PMCID: PMC8336453 DOI: 10.1021/jacs.0c13034] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Chiral dialkyl carbinamines are important in fields such as organic chemistry, pharmaceutical chemistry, and biochemistry, serving for example as bioactive molecules, chiral ligands, and chiral catalysts. Unfortunately, most catalytic asymmetric methods for synthesizing dialkyl carbinamines do not provide general access to amines wherein the two alkyl groups are of similar size (e.g., CH2R versus CH2R1). Herein, we report two mild methods for the catalytic enantioconvergent synthesis of protected dialkyl carbinamines, both of which use a chiral nickel catalyst to couple an alkylzinc reagent (1.1-1.2 equiv) with a racemic partner, specifically, an α-phthalimido alkyl chloride or an N-hydroxyphthalimide (NHP) ester of a protected α-amino acid. The methods are versatile, providing dialkyl carbinamine derivatives that bear an array of functional groups. For couplings of NHP esters, we further describe a one-pot variant wherein the NHP ester is generated in situ, allowing the generation of enantioenriched protected dialkyl carbinamines in one step from commercially available amino acid derivatives; we demonstrate the utility of this method by applying it to the efficient catalytic enantioselective synthesis of a range of interesting target molecules.
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Affiliation(s)
- Ze-Peng Yang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Dylan J Freas
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Gregory C Fu
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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He H, Xu N, Zhang H, Chen B, Hu Z, Guo K, Chun J, Cao S, Zhu Y. Brønsted acid-promoted hydroamination of unsaturated hydrazones: access to biologically important 5-arylpyrazolines. RSC Adv 2021; 11:17340-17345. [PMID: 35479684 PMCID: PMC9033072 DOI: 10.1039/d1ra03043d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 04/29/2021] [Indexed: 12/25/2022] Open
Abstract
A novel and efficient Brønsted acid-promoted hydroamination of hydrazone-tethered olefins has been developed. A variety of pyrazolines have been easily obtained in good to excellent yields with high chemo- and regioselectivity under simple and mild conditions. This method represents a straightforward, facile, and practical approach toward biologically important 5-arylpyrazolines, which are difficult to access by previously reported radical hydroamination of β,γ-unsaturated hydrazones. An efficient, chemo- and regioselective Brønsted acid-promoted hydroamination reaction of hydrazone-tethered olefins towards 5-arylpyrazolines was developed.![]()
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Affiliation(s)
- Han He
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Ning Xu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Honglin Zhang
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Bin Chen
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Zhengnan Hu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Kang Guo
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Jianlin Chun
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Shujun Cao
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Yingguang Zhu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
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11
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Al Bujuq N. Methods of Synthesis of Remdesivir, Favipiravir, Hydroxychloroquine, and Chloroquine: Four Small Molecules Repurposed for Clinical Trials during the Covid-19 Pandemic. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707386] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
AbstractThe novel coronavirus (COVID-19) disease has rapidly evolved into a sweeping pandemic despite public health measures. Screening and development of new vaccines and antivirals are expensive and time consuming. However, the repositioning of available drugs is an essential and universal strategy in the development of new drugs and therefore should receive priority attention as well as international government and agency support. Significant drugs such as chloroquine, hydroxychloroquine, favipiravir and remdesivir, are currently undergoing clinical studies to test their efficacy and safety. Some promising results have been achieved thus far in the treatment of COVID-19. In this article we summarize and discuss the most common synthetic strategies to apply in the preparation of these drug molecules. It is hoped that this compendium will provide an accessible useful guide and reference source for scientists, researchers and academia in their battle against COVD-19.1 Introduction2 Synthesis of Chloroquine (CQ) and Hydroxychloroquine (HCQ)2.1 Synthesis of 4,7-Dichloroquinoline 1
2.2 Synthesis of 2-Amino-5-(diethylamino)pentane (Novoldiamine) 2
2.3 Synthesis of 5-(N-Ethyl-N-2-hydroxyethylamino)-2-pentylamine 4
2.4 Developed Methods for Synthesis of Chloroquine and Hydroxychloroquine2.5 Synthesis of (R)-Chloroquine, (S)-Chloroquine, (R)-Hydroxychloroquine and (S)-Hydroxychloroquine3 Synthesis of Favipiravir (Avigan)4 Synthesis of Remdesivir5 Conclusion
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Affiliation(s)
- Nader Al Bujuq
- Chemistry Department-Faculty of Science-Taibah University
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12
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Liu RY, Buchwald SL. CuH-Catalyzed Olefin Functionalization: From Hydroamination to Carbonyl Addition. Acc Chem Res 2020; 53:1229-1243. [PMID: 32401530 DOI: 10.1021/acs.accounts.0c00164] [Citation(s) in RCA: 184] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In organic synthesis, ligand-modified copper(I) hydride (CuH) complexes have become well-known reagents and catalysts for selective reduction, particularly toward Michael acceptors and carbonyl compounds. Recently, our group and others have found that these hydride complexes undergo migratory insertion (hydrocupration) with relatively unactivated and electronically unpolarized olefins, producing alkylcopper intermediates that can be leveraged to forge a variety of useful bonds. The resulting formal hydrofunctionalization reactions have formed the basis for a resurgence of research in CuH catalysis. This Account chronicles the development of this concept in our research group, highlighting its origin in the context of asymmetric hydroamination, evolution to more general C-X bond-forming reactions, and applications in the addition of olefin-derived nucleophiles to carbonyl derivatives.Hydroamination, the formal insertion of an olefin into the N-H bond of an amine, is a process of significant academic and industrial interest, due to its potential to transform widely available alkenes and alkynes into valuable complex amines. We developed a polarity-reversed strategy for catalytic enantioselective hydroamination relying on the reaction of olefins with CuH to generate chiral organocopper intermediates, which are intercepted by electrophilic amine reagents. By engineering the auxiliary ligand, amine electrophile, and reaction conditions, the scope of this method has since been extended to include many types of olefins, including challenging internal olefins. Further, the scope of amine reagents has been expanded to enable the synthesis of primary, secondary, and tertiary amines as well as amides, N-alkylated heterocycles, and anilines. All of these reactions exhibit high regio- and stereoselectivity and, due to the mild conditions required, excellent tolerance for heterocycles and polar functional groups.Though the generation of alkylcopper species from olefins was originally devised as a means to solve the hydroamination problem, we soon found that these intermediates could react efficiently with an unexpectedly broad range of electrophiles, including alkyl halides, silicon reagents, arylpalladium species, heterocycles, and carbonyl derivatives. The general ability of olefins to function as precursors for nucleophilic intermediates has proved particularly advantageous in carbonyl addition reactions because it overcomes many of the disadvantages associated with traditional organometallic reagents. By removing the need for pregeneration of the nucleophile in a separate operation, CuH-catalyzed addition reactions of olefin-derived nucleophiles feature improved step economy, enhanced functional group tolerance, and the potential for catalyst control over regio- and stereoselectivity. Following this paradigm, feedstock olefins such as allene, butadiene, and styrene have been employed as reagents for asymmetric alkylation of ketones, imines, and aldehydes.
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Affiliation(s)
- Richard Y. Liu
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States
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13
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Kaiser D, Tona V, Gonçalves CR, Shaaban S, Oppedisano A, Maulide N. A General Acid-Mediated Hydroaminomethylation of Unactivated Alkenes and Alkynes. Angew Chem Int Ed Engl 2019; 58:14639-14643. [PMID: 31482639 PMCID: PMC6790944 DOI: 10.1002/anie.201906910] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/27/2019] [Indexed: 01/31/2023]
Abstract
In comparison to the extensively studied metal-catalyzed hydroamination reaction, hydroaminomethylation has received significantly less attention despite its considerable potential to streamline amine synthesis. State-of-the-art protocols for hydroaminomethylation of alkenes rely largely on transition-metal catalysis, enabling this transformation only under highly designed and controlled conditions. Here we report a broadly applicable, acid-mediated approach to the hydroaminomethylation of unactivated alkenes and alkynes. This methodology employs cheap, readily available, and bench-stable reactants and affords the desired amines with excellent functional group tolerance and impeccable regioselectivity. The broad scope of this transformation, as well as mechanistic investigations and in situ domino functionalization reactions are reported.
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Affiliation(s)
- Daniel Kaiser
- University of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
| | - Veronica Tona
- University of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
| | - Carlos R Gonçalves
- University of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
| | - Saad Shaaban
- University of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
| | - Alberto Oppedisano
- University of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
| | - Nuno Maulide
- University of Vienna, Institute of Organic Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
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14
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Kaiser D, Tona V, Gonçalves CR, Shaaban S, Oppedisano A, Maulide N. Eine allgemeine Methode zur Hydroaminomethylierung von Alkenen und Alkinen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906910] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Daniel Kaiser
- Universität Wien Institut für Organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Veronica Tona
- Universität Wien Institut für Organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Carlos R. Gonçalves
- Universität Wien Institut für Organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Saad Shaaban
- Universität Wien Institut für Organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Alberto Oppedisano
- Universität Wien Institut für Organische Chemie Währinger Straße 38 1090 Wien Österreich
| | - Nuno Maulide
- Universität Wien Institut für Organische Chemie Währinger Straße 38 1090 Wien Österreich
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15
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Tseliou V, Knaus T, Masman MF, Corrado ML, Mutti FG. Generation of amine dehydrogenases with increased catalytic performance and substrate scope from ε-deaminating L-Lysine dehydrogenase. Nat Commun 2019; 10:3717. [PMID: 31420547 PMCID: PMC6697735 DOI: 10.1038/s41467-019-11509-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 07/15/2019] [Indexed: 01/07/2023] Open
Abstract
Amine dehydrogenases (AmDHs) catalyse the conversion of ketones into enantiomerically pure amines at the sole expense of ammonia and hydride source. Guided by structural information from computational models, we create AmDHs that can convert pharmaceutically relevant aromatic ketones with conversions up to quantitative and perfect chemical and optical purities. These AmDHs are created from an unconventional enzyme scaffold that apparently does not operate any asymmetric transformation in its natural reaction. Additionally, the best variant (LE-AmDH-v1) displays a unique substrate-dependent switch of enantioselectivity, affording S- or R-configured amine products with up to >99.9% enantiomeric excess. These findings are explained by in silico studies. LE-AmDH-v1 is highly thermostable (Tm of 69 °C), retains almost entirely its catalytic activity upon incubation up to 50 °C for several days, and operates preferentially at 50 °C and pH 9.0. This study also demonstrates that product inhibition can be a critical factor in AmDH-catalysed reductive amination.
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Affiliation(s)
- Vasilis Tseliou
- Van 't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Tanja Knaus
- Van 't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands.
| | - Marcelo F Masman
- Van 't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Maria L Corrado
- Van 't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Francesco G Mutti
- Van 't Hoff Institute for Molecular Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands.
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16
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Adamson NJ, Jeddi H, Malcolmson SJ. Preparation of Chiral Allenes through Pd-Catalyzed Intermolecular Hydroamination of Conjugated Enynes: Enantioselective Synthesis Enabled by Catalyst Design. J Am Chem Soc 2019; 141:8574-8583. [PMID: 31070902 DOI: 10.1021/jacs.9b02637] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In this study, we establish that conjugated enynes undergo selective 1,4-hydroamination under Pd catalysis to deliver chiral allenes with pendant allylic amines. Several primary and secondary aliphatic and aryl-substituted amines couple with a wide range of mono- and disubstituted enynes in a nonenantioselective reaction where DPEphos serves as the ligand for Pd. Benzophenone imine acts as an ammonia surrogate to afford primary amines in a two-step/one-pot process. Examination of chiral catalysts revealed a high degree of reversibility in the C-N bond formation that negatively impacted enantioselectivity. Consequently, an electron-poor ferrocenyl-PHOX ligand was developed to enable efficient and enantioselective enyne hydroamination.
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Affiliation(s)
- Nathan J Adamson
- Department of Chemistry , Duke University , Durham , North Carolina 27708 , United States
| | - Haleh Jeddi
- Department of Chemistry , Duke University , Durham , North Carolina 27708 , United States
| | - Steven J Malcolmson
- Department of Chemistry , Duke University , Durham , North Carolina 27708 , United States
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17
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Xu C, Feng Y, Li F, Han J, He YM, Fan QH. A Synthetic Route to Chiral Benzo-Fused N-Heterocycles via Sequential Intramolecular Hydroamination and Asymmetric Hydrogenation of Anilino-Alkynes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00183] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cong Xu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), and University of Chinese Academy of Sciences, Beijing 100190, PR China
| | - Yu Feng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), and University of Chinese Academy of Sciences, Beijing 100190, PR China
| | - Faju Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), and University of Chinese Academy of Sciences, Beijing 100190, PR China
| | - Jiahong Han
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), and University of Chinese Academy of Sciences, Beijing 100190, PR China
| | - Yan-Mei He
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), and University of Chinese Academy of Sciences, Beijing 100190, PR China
| | - Qing-Hua Fan
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), and University of Chinese Academy of Sciences, Beijing 100190, PR China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, PR China
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18
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Nguyen HN, Hultzsch KC. Rare-Earth-Metal-Catalyzed Kinetic Resolution of Chiral Aminoalkenes via Hydroamination: The Effect of the Silyl Substituent of the Binaphtholate Ligand on Resolution Efficiency. European J Org Chem 2019; 2019:2592-2601. [PMID: 31244549 PMCID: PMC6582503 DOI: 10.1002/ejoc.201900107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Indexed: 01/11/2023]
Abstract
The kinetic resolution of α-substituted aminopentenes via intramolecular hydroamination was investigated using various 3,3'-silyl-substituted binaphtholate yttrium catalysts. High efficiencies in the kinetic resolution were observed for methyl-, benzyl-, and phenyl-substituted substrates utilizing the cyclohexyldiphenylsilyl-substituted catalyst 2c with resolution factors reaching as high as 90(5) for hex-5-en-2-amine (3a). Kinetic analysis of the enantioenriched substrates with the matching and mismatching catalyst revealed that the efficiency of catalyst 2c benefits significantly from a favorable Curtin-Hammett pre-equilibrium and by a large kfast/kslow ratio. Other binaphtholate catalysts were less efficient due to a less favorable Curtin-Hammett pre-equilibrium, which often favored the mismatching substrate-catalyst combination. Cyclization of the matched substrate proceeds generally with large trans-selectivity, whereas the trans/cis-ratio for mismatched substrates is significantly diminished, favoring the cis-cyclization product isomer in some instances.
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Affiliation(s)
- Hiep N Nguyen
- Department of Chemistry and Chemical Biology Rutgers, The State University of New Jersey 610 Taylor Road 8087 Piscataway, New Jersey 08854- USA
| | - Kai C Hultzsch
- Universität Wien Fakultät für Chemie Institut für Chemische Katalyse Währinger Straße 38 1090 Wien Austria
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19
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Lin JS, Li TT, Jiao GY, Gu QS, Cheng JT, Lv L, Liu XY. Chiral Brønsted Acid Catalyzed Dynamic Kinetic Asymmetric Hydroamination of Racemic Allenes and Asymmetric Hydroamination of Dienes. Angew Chem Int Ed Engl 2019; 58:7092-7096. [PMID: 30919531 DOI: 10.1002/anie.201900955] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 03/19/2019] [Indexed: 12/31/2022]
Abstract
The first highly efficient and practical chiral Brønsted acid catalyzed dynamic kinetic asymmetric hydroamination (DyKAH) of racemic allenes and asymmetric hydroamination of unactivated dienes with both high E/Z selectivity and enantioselectivity are described herein. The transformation proceeds through a new catalytic asymmetric model involving a highly reactive π-allylic carbocationic intermediate, generated from racemic allenes or dienes through a proton transfer mediated by an activating/directing thiourea group. This method affords expedient access to structurally diverse enantioenriched, potentially bioactive alkenyl-containing aza-heterocycles and bicyclic aza-heterocycles.
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Affiliation(s)
- Jin-Shun Lin
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Biology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.,Department of Chemistry, Tsinghua University, Beijing, 100084, China.,Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Tao-Tao Li
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Guan-Yuan Jiao
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Qiang-Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jiang-Tao Cheng
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Ling Lv
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xin-Yuan Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
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20
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Lin J, Li T, Jiao G, Gu Q, Cheng J, Lv L, Liu X. Chiral Brønsted Acid Catalyzed Dynamic Kinetic Asymmetric Hydroamination of Racemic Allenes and Asymmetric Hydroamination of Dienes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900955] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jin‐Shun Lin
- State Key Laboratory of Chemical OncogenomicsKey Laboratory of Chemical BiologyGraduate School at ShenzhenTsinghua University Shenzhen 518055 China
- Department of ChemistryTsinghua University Beijing 100084 China
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen 518055 China
| | - Tao‐Tao Li
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen 518055 China
| | - Guan‐Yuan Jiao
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen 518055 China
| | - Qiang‐Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of ChemistrySouthern University of Science and Technology Shenzhen 518055 China
| | - Jiang‐Tao Cheng
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen 518055 China
| | - Ling Lv
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen 518055 China
| | - Xin‐Yuan Liu
- Department of Chemistry and Shenzhen Grubbs InstituteSouthern University of Science and Technology Shenzhen 518055 China
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21
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Lepori C, Bernoud E, Guillot R, Tobisch S, Hannedouche J. Experimental and Computational Mechanistic Studies of the β‐Diketiminatoiron(II)‐Catalysed Hydroamination of Primary Aminoalkenes. Chemistry 2019; 25:835-844. [DOI: 10.1002/chem.201804681] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Clément Lepori
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR 8182Université Paris-Sud, Université Paris-Saclay Rue du doyen Georges Poitou Orsay 91405 France
| | - Elise Bernoud
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR 8182Université Paris-Sud, Université Paris-Saclay Rue du doyen Georges Poitou Orsay 91405 France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR 8182Université Paris-Sud, Université Paris-Saclay Rue du doyen Georges Poitou Orsay 91405 France
- CNRS Orsay 91405 France
| | - Sven Tobisch
- School of ChemistryUniversity of St Andrews Purdie Building North Haugh St Andrews KY16 9ST UK
| | - Jérôme Hannedouche
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR 8182Université Paris-Sud, Université Paris-Saclay Rue du doyen Georges Poitou Orsay 91405 France
- CNRS Orsay 91405 France
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22
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Nájera C, Beletskaya IP, Yus M. Metal-catalyzed regiodivergent organic reactions. Chem Soc Rev 2019; 48:4515-4618. [DOI: 10.1039/c8cs00872h] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review discusses metal-catalysed regiodivergent additions, allylic substitutions, CH-activation, cross-couplings and intra- or intermolecular cyclisations.
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Affiliation(s)
- Carmen Nájera
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Universidad de Alicante
- E-03080 Alicante
- Spain
| | - Irina P. Beletskaya
- Chemistry Department
- M. V. Lomonosov Moscow State University
- 119992 Moscow
- Russia
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Universidad de Alicante
- E-03080 Alicante
- Spain
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23
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Nguyen HN, Lee H, Audörsch S, Reznichenko AL, Nawara-Hultzsch AJ, Schmidt B, Hultzsch KC. Asymmetric Intra- and Intermolecular Hydroamination Catalyzed by 3,3′-Bis(trisarylsilyl)- and 3,3′-Bis(arylalkylsilyl)-Substituted Binaphtholate Rare-Earth-Metal Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00510] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiep N. Nguyen
- Department of Chemistry & Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Hyeunjoo Lee
- Department of Chemistry & Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Stephan Audörsch
- Institut für Chemie, Organische Synthesechemie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Golm, Germany
| | - Alexander L. Reznichenko
- Department of Chemistry & Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Agnieszka J. Nawara-Hultzsch
- University of Vienna, Faculty of Chemistry, Institute of Chemical Catalysis, Währinger Strasse 38, 1090 Vienna, Austria
| | - Bernd Schmidt
- Institut für Chemie, Organische Synthesechemie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Golm, Germany
| | - Kai C. Hultzsch
- Department of Chemistry & Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
- University of Vienna, Faculty of Chemistry, Institute of Chemical Catalysis, Währinger Strasse 38, 1090 Vienna, Austria
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24
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Park S, Malcolmson SJ. Development and Mechanistic Investigations of Enantioselective Pd-Catalyzed Intermolecular Hydroaminations of Internal Dienes. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01914] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sangjune Park
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J. Malcolmson
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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25
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Härling SM, Fener BE, Krieck S, Görls H, Westerhausen M. Potassium Dimesitylphosphinite Catalyzed Intermolecular Hydrophosphorylation of Alkynes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00368] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Stephan M. Härling
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Benjamin E. Fener
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
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26
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Carbon—carbon and carbon—nitrogen bond formation reactions catalyzed by the magnesium and calcium acenaphthene-1,2-diimine complexes. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2095-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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27
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28
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Abadie MA, Trivelli X, Medina F, Duhal N, Kouach M, Linden B, Génin E, Vandewalle M, Capet F, Roussel P, Del Rosal I, Maron L, Agbossou-Niedercorn F, Michon C. Gold(I)-Catalysed Asymmetric Hydroamination of Alkenes: A Silver- and Solvent-Dependent Enantiodivergent Reaction. Chemistry 2017; 23:10777-10788. [DOI: 10.1002/chem.201701301] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Marc-Antoine Abadie
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide; 59000 Lille France
- ENSCL; UCCS-CCM-MOCAH (Chimie-C7) CS 90108; 59652 Villeneuve d'Ascq Cedex France
| | - Xavier Trivelli
- UGSF CNRS, UMR 8576; Université Lille Nord de France; 59655 Villeneuve d'Ascq Cedex France
| | - Florian Medina
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide; 59000 Lille France
- ENSCL; UCCS-CCM-MOCAH (Chimie-C7) CS 90108; 59652 Villeneuve d'Ascq Cedex France
| | - Nathalie Duhal
- Service commun de physico-chimie CUMA; Faculté de Pharmacie-Univ. Lille; 3 rue du Professeur Laguesse BP 83-59006 Lille Cedex France
| | - Mostafa Kouach
- Service commun de physico-chimie CUMA; Faculté de Pharmacie-Univ. Lille; 3 rue du Professeur Laguesse BP 83-59006 Lille Cedex France
| | - Bernhard Linden
- Linden ChroMasSpec GmbH; Auf dem Berge 25 28844 Weyhe Germany
| | - Eric Génin
- ThermoFisher Scientific; 16 avenue du Québec-silic 765 Villebon-sur-Yvette 91963 Courtaboeuf Cedex France
| | - Maxence Vandewalle
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide; 59000 Lille France
| | - Frédéric Capet
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide; 59000 Lille France
| | - Pascal Roussel
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide; 59000 Lille France
| | - Iker Del Rosal
- Université de Toulouse et CNRS INSA; UPS, CNRS, UMR 5215, LPCNO; 135 avenue de Rangueil 31077 Toulouse France
| | - Laurent Maron
- Université de Toulouse et CNRS INSA; UPS, CNRS, UMR 5215, LPCNO; 135 avenue de Rangueil 31077 Toulouse France
| | - Francine Agbossou-Niedercorn
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide; 59000 Lille France
- ENSCL; UCCS-CCM-MOCAH (Chimie-C7) CS 90108; 59652 Villeneuve d'Ascq Cedex France
| | - Christophe Michon
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide; 59000 Lille France
- ENSCL; UCCS-CCM-MOCAH (Chimie-C7) CS 90108; 59652 Villeneuve d'Ascq Cedex France
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29
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Adamson NJ, Hull E, Malcolmson SJ. Enantioselective Intermolecular Addition of Aliphatic Amines to Acyclic Dienes with a Pd-PHOX Catalyst. J Am Chem Soc 2017; 139:7180-7183. [PMID: 28453290 DOI: 10.1021/jacs.7b03480] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report a method for the catalytic, enantioselective intermolecular addition of aliphatic amines to acyclic 1,3-dienes. In most cases, reactions proceed efficiently at or below room temperature in the presence of 5 mol % of a Pd catalyst bearing a PHOX ligand, generating allylic amines in up to 97:3 er. The presence of an electron-deficient phosphine within the ligand not only leads to a more active catalyst but also is critical for achieving high site selectivity in the transformation.
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Affiliation(s)
- Nathan J Adamson
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Ethan Hull
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Steven J Malcolmson
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
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30
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Suslov D, Bykov M, Pakhomova M, Abramov P, Ushakov I, Tkach V. Cationic acetylacetonate palladium complexes/boron trifluoride etherate catalyst systems for hydroamination of vinylarenes using arylamines. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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31
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Timmerman JC, Laulhé S, Widenhoefer RA. Gold(I)-Catalyzed Intramolecular Hydroamination of Unactivated Terminal and Internal Alkenes with 2-Pyridones. Org Lett 2017; 19:1466-1469. [DOI: 10.1021/acs.orglett.7b00450] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jacob C. Timmerman
- French Family Science Center, Duke University, Durham, North Carolina 27708, United States
| | - Sébastien Laulhé
- French Family Science Center, Duke University, Durham, North Carolina 27708, United States
| | - Ross A. Widenhoefer
- French Family Science Center, Duke University, Durham, North Carolina 27708, United States
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32
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Motolko KSA, Emslie DJH, Britten JF. Rigid NON-donor pincer ligand complexes of lutetium and lanthanum: synthesis and hydroamination catalysis. RSC Adv 2017. [DOI: 10.1039/c7ra04432a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A rigid NON-donor pincer ligand was employed for the synthesis of neutral lutetium and anionic lanthanum alkyl complexes; the former is highly active for both intra- and inter-molecular hydroamination.
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Affiliation(s)
- Kelly S. A. Motolko
- Department of Chemistry and Chemical Biology
- McMaster University
- Hamilton
- Canada
| | - David J. H. Emslie
- Department of Chemistry and Chemical Biology
- McMaster University
- Hamilton
- Canada
| | - James F. Britten
- McMaster Analytical X-Ray (MAX) Diffraction Facility
- Department of Chemistry and Chemical Biology
- McMaster University
- Hamilton
- Canada
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33
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De Nisi A, Sierra S, Ferrara M, Monari M, Bandini M. TBAF catalyzed one-pot synthesis of allenyl-indoles. Org Chem Front 2017. [DOI: 10.1039/c7qo00414a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The site selective synthesis of functionalized indoles is presented under environmentally convenient tetrabutylammonium fluoride catalysis.
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Affiliation(s)
- A. De Nisi
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
| | - S. Sierra
- Departamento de Química Orgánica y Química Inorgánica
- Universidad de Alcalá
- Madrid
- Spain
| | - M. Ferrara
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
| | - M. Monari
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
| | - M. Bandini
- Dipartimento di Chimica “G. Ciamician”
- Alma Mater Studiorum – Università di Bologna
- 40126 Bologna
- Italy
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34
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Li BJ, EI-Nachef C, Beauchemin AM. Organocatalysis using aldehydes: the development and improvement of catalytic hydroaminations, hydrations and hydrolyses. Chem Commun (Camb) 2017; 53:13192-13204. [DOI: 10.1039/c7cc07352f] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Aldehydes as organocatalysts? Simple aldehydes achieve difficult intermolecular reactions by exploiting temporary intramolecularity and inducing electrophilic activation.
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Affiliation(s)
- Bin-Jie Li
- Centre for Catalysis Research and Innovation
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Claudia EI-Nachef
- Centre for Catalysis Research and Innovation
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - André M. Beauchemin
- Centre for Catalysis Research and Innovation
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
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35
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Pirnot MT, Wang YM, Buchwald SL. Copper Hydride Catalyzed Hydroamination of Alkenes and Alkynes. Angew Chem Int Ed Engl 2016; 55:48-57. [PMID: 26661678 PMCID: PMC4782926 DOI: 10.1002/anie.201507594] [Citation(s) in RCA: 396] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Indexed: 12/15/2022]
Abstract
Over the past few years, CuH-catalyzed hydroamination has been discovered and developed as a robust and conceptually novel approach for the synthesis of enantioenriched secondary and tertiary amines. The success in this area of research was made possible through the large body of precedent in copper(I) hydride catalysis and the well-explored use of hydroxylamine esters as electrophilic amine sources in related copper-catalyzed processes. This Minireview details the background, advances, and mechanistic investigations in CuH-catalyzed hydroamination.
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Affiliation(s)
- Michael T Pirnot
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA)
| | - Yi-Ming Wang
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA)
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA).
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36
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Cimino A, Moscatelli F, Ferretti F, Ragaini F, Germain S, Hannedouche J, Schulz E, Luconi L, Rossin A, Giambastiani G. Novel yttrium and zirconium catalysts featuring reduced Ar-BIANH2 ligands for olefin hydroamination (Ar-BIANH2 = bis-arylaminoacenaphthylene). NEW J CHEM 2016. [DOI: 10.1039/c6nj02199a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Even demanding aminoalkenes can be cyclized by Ar-BIANH2 yttrium complexes; a related zirconium complex has been crystallographically characterized.
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Affiliation(s)
- Alessandro Cimino
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Filippo Moscatelli
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Francesco Ferretti
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Fabio Ragaini
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Stéphane Germain
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Jérôme Hannedouche
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Emmanuelle Schulz
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Lapo Luconi
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
| | - Andrea Rossin
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
| | - Giuliano Giambastiani
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
- Kazan Federal University
- 420008 Kazan
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37
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Spallek T, Anwander R. Rare-earth metal diisopropylamide-catalyzed intramolecular hydroamination. Dalton Trans 2016; 45:16393-16403. [DOI: 10.1039/c6dt03045a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Well-defined rare-earth metal diisopropylamide complexes provide an exemplary case study to investigate the effect of donor solvent, alkali metal, chloro co-ligands, and in situ catalyst formation.
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Affiliation(s)
- Tatiana Spallek
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie
- Universität Tübingen
- 72076 Tübingen
- Germany
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38
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Zhang Y, Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Intramolecular hydroamination reactions catalyzed by zirconium complexes bearing bridged bis(phenolato) ligands. RSC Adv 2016. [DOI: 10.1039/c5ra23270h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Cationic species derived from zirconium complexes stabilized by bridged bis(phenolato) ligands showed good activities in catalyzing intramolecular hydroamination/cyclization of primary and secondary amines.
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Affiliation(s)
- Yu Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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39
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Pirnot MT, Wang YM, Buchwald SL. Kupferhydrid-katalysierte Hydroaminierung von Alkenen und Alkinen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507594] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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40
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Younis FM, Krieck S, Görls H, Westerhausen M. Hydroamination of diphenylbutadiyne with secondary N-methyl-anilines using the dipotassium tetrakis(2,6-diisopropylanilino)calciate precatalyst. Dalton Trans 2015; 45:6241-50. [PMID: 26634234 DOI: 10.1039/c5dt03818a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The approved precatalyst [K2Ca{N(H)Dipp}4] was employed to study the hydroamination of diphenylbutadiyne with N-methyl-anilines in tetrahydrofuran at room temperature. The hydroamination occurs regioselectively within a few hours yielding (N-methyl)-(N-aryl)-1,4-diphenylbut-1-ene-3-yne-1-ylamine with phenyl (1a), 4-tolyl (1b) and 4-fluorophenyl groups (1c). In all cases a mixture of E- and Z-isomers is obtained. The second hydroamination step requires drastically extended reaction times and is successful only for the reaction of diphenylbutadiyne with N-methyl-aniline and N-methyl-4-fluoroaniline giving 1,4-diphenyl-1,4-bis(N-methyl-anilino)buta-1,3-diene [R = H (2a) and F (2c)]; a mixture of E,E-, E,Z- and Z,Z-isomers is obtained. The X-ray structures of E-1a, E-1b and E-1c show a slightly shortened N-C bond to the alkene moieties. Due to enhanced steric strain the anilino units of Z,Z-2c and Z,Z-3 turn away from the butadiene unit and consequently, the lone pair at the planar nitrogen atoms slightly interacts with the adjacent aryl groups.
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Affiliation(s)
- Fadi M Younis
- Institute of Inorganic and Analytical Chemistry, Friedrich-Schiller-University Jena, Humboldtstr. 8, D-07743 Jena, Germany.
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41
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Chen QA, Chen Z, Dong VM. Rhodium-Catalyzed Enantioselective Hydroamination of Alkynes with Indolines. J Am Chem Soc 2015; 137:8392-5. [PMID: 26107923 DOI: 10.1021/jacs.5b05200] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The hydroamination of internal alkynes via tandem rhodium catalysis gives branched N-allylic indolines with high regio- and enantioselectivity. An acid switch provides access to the linear isomer in preference to the branched isomer by an isomerization mechanism. Mechanistic studies suggest formation of an allene intermediate, which undergoes hydroamination to generate allylic amines instead of the enamine or imine products typically observed in alkyne hydroaminations.
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Affiliation(s)
- Qing-An Chen
- Department of Chemistry, University of California, Irvine, 4403 Natural Sciences 1, Irvine, California 92697, United States
| | - Zhiwei Chen
- Department of Chemistry, University of California, Irvine, 4403 Natural Sciences 1, Irvine, California 92697, United States
| | - Vy M Dong
- Department of Chemistry, University of California, Irvine, 4403 Natural Sciences 1, Irvine, California 92697, United States
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42
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Zhang X, Tobisch S, Hultzsch KC. σ-Insertive Mechanism versus Concerted Non-insertive Mechanism in the Intramolecular Hydroamination of Aminoalkenes Catalyzed by Phenoxyamine Magnesium Complexes: A Synthetic and Computational Study. Chemistry 2015; 21:7841-57. [DOI: 10.1002/chem.201406468] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/09/2015] [Indexed: 11/08/2022]
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43
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Yu F, Chen P, Liu G. Pd(ii)-catalyzed intermolecular enantioselective hydroamination of styrenes. Org Chem Front 2015. [DOI: 10.1039/c5qo00096c] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pd-catalyzed intermolecular asymmetric hydroamination of styrenes was developed with pyridine-oxazoline as the chiral ligand.
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Affiliation(s)
- Feng Yu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Shanghai
- China
| | - Pinhong Chen
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Shanghai
- China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Shanghai
- China
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