1
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Zuo D, Xiao X, Ma X, Nie P, Liu L, Chen T. Highly efficient esterification of carboxylic acids with O-H nucleophiles through acid/iodide cooperative catalysis. Org Biomol Chem 2024. [PMID: 39016558 DOI: 10.1039/d4ob00910j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
The esterification of carboxylic acids is an important reaction for preparing esters which find wide applications in various research fields. In this manuscript, we report an acid/iodide cooperative catalytic method which enables highly efficient esterification of carboxylic acids with a wide range of equivalent O-H nucleophiles including both alcohols and weak nucleophilic phenols. Under the reaction conditions, both aromatic and aliphatic carboxylic acids including those bearing functional groups work well, furnishing the corresponding esters in good to high yields. Moreover, this reaction is scalable and applicable to the modification of bioactive molecules. These results demonstrate the synthetic value of this new reaction in organic synthesis.
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Affiliation(s)
- Dongxu Zuo
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Xiong Xiao
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Xinyue Ma
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Peng Nie
- Guizhou Institute for Food and Drug Control, 84 Shibei Road, Yunyan District, Guiyang City, Guizhou Province, 550000, China
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Tieqiao Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
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2
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Samuel Rajan IAP, Rajendran S. DABCO-catalyzed esterification of N-pivaloyl-activated amides. Org Biomol Chem 2024; 22:5170-5180. [PMID: 38864233 DOI: 10.1039/d4ob00752b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
A previously elusive organocatalytic protocol for the esterification of amides is disclosed. DABCO (10 mol%) is identified as an effective catalyst for the esterification of N-pivaloyl amides. Although N-pivaloyl amides are nearly planar (amide bond twist (τ) = 4.54° and pyramidalization (χN = 6.39°)) and resonance stabilized, esterification is achieved with high efficiency. The developed protocol is generic, phenols, thiophenols, aliphatic alcohols, and thiols were identified as effective substrates. Furthermore, the reaction features a broad substrate scope and excellent functional group tolerance. To exemplify the practical applicability of the developed protocol, the esterification of bioactive natural products, pterostilbene and menthol, is demonstrated. In addition, a series of competitive experiments were conducted to establish the reactivity pattern of alcohols, thiols, and phenols, which could serve as selectivity principles for future synthetic design. Our findings signify a notable advancement in utilizing amides as versatile synthetic building blocks in organic synthesis under metal-free conditions.
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Affiliation(s)
- Ida Angel Priya Samuel Rajan
- Dept. of Chemistry, Vellore Institute of Technology Chennai Campus, Vandalur-Kelambakkam Road, Chennai - 600127, Tamil Nadu, India.
| | - Saravanakumar Rajendran
- Dept. of Chemistry, Vellore Institute of Technology Chennai Campus, Vandalur-Kelambakkam Road, Chennai - 600127, Tamil Nadu, India.
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3
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Qin H, Han Z, Bonku EM, Sun H, Odilov A, Zhu F, Abduahadi S, Zhu W, Shen J, Aisa HA. Direct esterification of amides by the dimethylsulfate-mediated activation of amide C-N bonds. Commun Chem 2024; 7:93. [PMID: 38678046 PMCID: PMC11055851 DOI: 10.1038/s42004-024-01180-9] [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] [Accepted: 04/16/2024] [Indexed: 04/29/2024] Open
Abstract
Amides are important intermediates in organic chemistry and the pharmaceutical industry, but their low reactivity requires catalysts and/or severe reaction conditions for esterification. Here, a novel approach was devised to convert amides into esters without the use of transition metals. The method effectively overcomes the inherent low reactivity of amides by employing dimethylsulfate-mediated reaction to activate the C-N bonds. To confirm the proposed reaction mechanism, control experiments and density functional theory (DFT) calculations were conducted. The method demonstrates a wide array of substrates, including amides with typical H/alkyl/aryl substitutions, N,N-disubstituted amides, amides derived from alkyl, aryl, or vinyl carboxylic acids, and even amino acid substrates with stereocentres. Furthermore, we have shown the effectiveness of dimethylsulfate in removing acyl protective groups in amino derivatives. This study presents a method that offers efficiency and cost-effectiveness in broadening the esterification capabilities of amides, thereby facilitating their increased utilization as synthetic compounds in diverse transformations.
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Affiliation(s)
- Hongjian Qin
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, Xinjiang, PR China
- University of Chinese Academy of Sciences, Beijing, PR China
| | - Zijian Han
- University of Chinese Academy of Sciences, Beijing, PR China
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Emmanuel Mintah Bonku
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Haiguo Sun
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Abdullajon Odilov
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Fuqiang Zhu
- Topharman Shanghai Co., Ltd., Shanghai, PR China
| | - Safomuddin Abduahadi
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Weiliang Zhu
- University of Chinese Academy of Sciences, Beijing, PR China.
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China.
| | - Jingshan Shen
- University of Chinese Academy of Sciences, Beijing, PR China.
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China.
| | - Haji A Aisa
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, Xinjiang, PR China.
- University of Chinese Academy of Sciences, Beijing, PR China.
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4
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Gao P, Rahman MM, Zamalloa A, Feliciano J, Szostak M. Classes of Amides that Undergo Selective N-C Amide Bond Activation: The Emergence of Ground-State Destabilization. J Org Chem 2023; 88:13371-13391. [PMID: 36054817 DOI: 10.1021/acs.joc.2c01094] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ground-state destabilization of the N-C(O) linkage represents a powerful tool to functionalize the historically inert amide bond. This burgeoning reaction manifold relies on the availability of amide bond precursors that participate in weakening of the nN → π*C=O conjugation through N-C twisting, N pyramidalization, and nN electronic delocalization. Since 2015, acyl N-C amide bond activation through ground-state destabilization of the amide bond has been achieved by transition-metal-catalyzed oxidative addition of the N-C(O) bond, generation of acyl radicals, and transition-metal-free acyl addition. This Perspective summarizes contributions of our laboratory in the development of new ground-state-destabilized amide precursors enabled by twist and electronic activation of the amide bond and synthetic utility of ground-state-destabilized amides in cross-coupling reactions and acyl addition reactions. The use of ground-state-destabilized amides as electrophiles enables a plethora of previously unknown transformations of the amide bond, such as acyl coupling, decarbonylative coupling, radical coupling, and transition-metal-free coupling to forge new C-C, C-N, C-O, C-S, C-P, and C-B bonds. Structural studies of activated amides and catalytic systems developed in the past decade enable the view of the amide bond to change from the "traditionally inert" to "readily modifiable" functional group with a continuum of reactivity dictated by ground-state destabilization.
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Affiliation(s)
- Pengcheng Gao
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Md Mahbubur Rahman
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Alfredo Zamalloa
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Jessica Feliciano
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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5
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Zhu X, Wan K, Zhang J, Zhao H, He Y, Ma Y, Yang X, Szostak M. Esterification of Thioamides via Selective N-C(S) Cleavage under Mild Conditions. Org Lett 2023; 25:6149-6154. [PMID: 37578346 DOI: 10.1021/acs.orglett.3c02238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Herein, we report an exceedingly mild method for the direct, transition-metal-free esterification of thioamides through the selective generation of tetrahedral intermediates. The method represents the first transition-metal-free approach to the thioamide to thionoester transformation in organic synthesis. This reactivity has been accomplished through N,N-Boc2-thioamides that engage in ground-state destabilization of the nN → π*C═S conjugation. The ground-state destabilization of "single-atom" bioisosteric thioamides will expand the arsenal of valuable amide bond functionalization reactions.
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Affiliation(s)
- Xinhao Zhu
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Kerou Wan
- Shaanxi Key Laboratory of Catalytic Materials and Technology, Kaili Catalyst & New Materials Company, Ltf., Xi'an 710299, China
| | - Jin Zhang
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Hui Zhao
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yang He
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yangmin Ma
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Xiufang Yang
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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6
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Gazizov AS, Smolobochkin AV, Rizbayeva TS, Vatsadze SZ, Burilov AR, Sinyashin OG, Alabugin IV. "Stereoelectronic Deprotection of Nitrogen": Recovering Nucleophilicity with a Conformational Change. J Org Chem 2023. [PMID: 37216317 DOI: 10.1021/acs.joc.3c00161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Ureas are often thought of as "double amides" due to the obvious structural similarity of these functional groups. The main structural feature of an amide is its planarity, which is responsible for the conjugation between the nitrogen atom and carbonyl moiety and the decrease of amide nucleophilicity. Consequently, since amides are poor nucleophiles, ureas are often thought of as poor nucleophiles as well. Herein, we demonstrate that ureas can be distinctly different from amides. These differences can be amplified by rotation around one of the ureas' C-N bonds, which switches off the amide resonance and recovers the nucleophilicity of one of the nitrogen atoms. This conformational change can be further facilitated by the judicious introduction of steric bulk to disfavor the planar conformation. This change in reactivity is an example of "stereoelectronic deprotection," a concept when the desired reactivity of a functional group is produced by a conformational change rather than a chemical modification. This concept may be used complementarily to the traditional protecting groups. We also demonstrate both the viability and the utility of this concept by the synthesis of unusual 2-oxoimidazolium salts possessing quaternary nitrogen atoms at the urea moiety.
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Affiliation(s)
- Almir S Gazizov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Science, Arbuzova Str., 8, Kazan 420088, Russian Federation
| | - Andrey V Smolobochkin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Science, Arbuzova Str., 8, Kazan 420088, Russian Federation
| | - Tanzilya S Rizbayeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Science, Arbuzova Str., 8, Kazan 420088, Russian Federation
| | - Sergey Z Vatsadze
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prosp., Moscow 119991, Russian Federation
| | - Alexander R Burilov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Science, Arbuzova Str., 8, Kazan 420088, Russian Federation
| | - Oleg G Sinyashin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Science, Arbuzova Str., 8, Kazan 420088, Russian Federation
| | - Igor V Alabugin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Science, Arbuzova Str., 8, Kazan 420088, Russian Federation
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee Fl 32306, United States
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7
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Nishikawa Y, Mori D, Toyoda M, Amano Y, Hosoi M, Ando M, Hara O. Chelating Picolinaldehyde Hydrazone Amides as Protecting Groups for Carboxylic Acids: Orthogonal Reactivities of Hydrazone Amides and Esters in Hydrolysis. Org Lett 2023; 25:895-900. [PMID: 36511633 DOI: 10.1021/acs.orglett.2c03670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report a chelating hydrazone amide as a protecting group for carboxylic acids. Unlike most esters, 2-picolinaldehyde hydrazone amides are stable under acidic or basic hydrolytic conditions. However, hydrazone amides can be easily converted to the corresponding carboxylic acids via Ni-mediated hydrolysis. Orthogonal reactivities of the hydrazone amides and representative protecting groups were verified by control experiments and peptide synthesis, demonstrating that chelating hydrazone amides are highly useful protecting groups.
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Affiliation(s)
- Yasuhiro Nishikawa
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Daiki Mori
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Mayuko Toyoda
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Yukiho Amano
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Midori Hosoi
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Momoka Ando
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan
| | - Osamu Hara
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan
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8
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Biological Activity of Hybrid Molecules Based on Major Constituents of Cinnammomun verum and Thymus vulgaris Essential Oils. Life (Basel) 2023; 13:life13020499. [PMID: 36836856 PMCID: PMC9966931 DOI: 10.3390/life13020499] [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: 01/19/2023] [Revised: 02/03/2023] [Accepted: 02/07/2023] [Indexed: 02/16/2023] Open
Abstract
Plants have been used by humans since ancient times due their antimicrobial and medicinal properties. Essential oils (EOs) are complex mixtures of secondary plant metabolites, including terpenoids, phenylpropanoids, and other aromatic compounds. Cinnamomun verum and Thyme vulgaris EOs and their organic extracts exert numerous biological activities because of their major compounds, particularly thymol, carvacrol, eugenol, and benzoic and cinnamic acid. The structural motifs presented by these phytochemicals are responsible for their biological activities. Modification or hybridization of these structures could lead to new bio-based compounds with improved efficacy or multiple modes of action. In this work, we aimed to develop reliable methods of obtaining six hybrid molecules from the major constituents of C. verum and T. vulgaris EOs. For the first time, we tested their efficacy in the inhibition of the mycelium growth and spore germination of two of the most important phytopathogenic fungi, Fusarium oxysporum and Colletotrichum gloeosporioides, and one opportunistic human pathogen, Aspergillus niger. The cytotoxic activity of the obtained hybrids was assessed using the brine shrimp lethality assay. In addition, we report for the first time a biocatalytic process for the obtention of these bioactive hybrid molecules. The results of this work enable the possibility of using hybrid molecules based on the major constituents of EOs as active ingredients in strategic industries such as agriculture, aquaculture, and pharmaceuticals.
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9
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Liu C, Szostak M. Amide N-C Bond Activation: A Graphical Overview of Acyl and Decarbonylative Coupling. SYNOPEN 2023; 7:88-101. [PMID: 38037650 PMCID: PMC10686541 DOI: 10.1055/a-2035-6733] [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] [Indexed: 02/16/2023] Open
Abstract
This Graphical Review provides an overview of amide bond activation achieved by selective oxidative addition of the N-C(O) acyl bond to transition metals and nucleophilic acyl addition, resulting in acyl and decarbonylative coupling together with key mechanistic details pertaining to amide bond distortion underlying this reactivity manifold.
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Affiliation(s)
- Chengwei Liu
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, China
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA
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10
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Zou P, Wang K. Methanolysis of Amides under High-Temperature and High-Pressure Conditions with a Continuous Tubular Reactor. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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11
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Singh S, Kandasamy J. Synthesis of 1,3‐dicarbonyl compounds using N‐Cbz amides as an acyl source under transition metal‐free conditions at room temperature. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Shweta Singh
- IIT BHU: Indian Institute of Technology BHU Varanasi Chemistry INDIA
| | - Jeyakumar Kandasamy
- Indian Institute of Technology (BHU) Chemistry Varanasi 221005 Varanasi INDIA
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12
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Joseph D, Lee S. Reaction of Amide and Sodium Azide for the Synthesis of Acyl Azide, Urea, and Iminophosphorane. Org Lett 2022; 24:6186-6191. [PMID: 35959978 DOI: 10.1021/acs.orglett.2c02429] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Amides reacted with NaN3 to give the acyl azides in DMF at 25 °C and produce the symmetrical ureas in THF/H2O at 80 °C via the sequential reaction of acyl substitution and Curtius rearrangement. All acyl azides were also obtained from the secondary amides via sequential reaction of p-toluenesulfonyl chloride and NaN3. In addition, keto-stabilized iminophosphoranes were prepared from a one-pot reaction of amides, NaN3, and phosphines.
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Affiliation(s)
- Devaneyan Joseph
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
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13
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Hoque ME, Bisht R, Unnikrishnan A, Dey S, Mahamudul Hassan MM, Guria S, Rai RN, Sunoj RB, Chattopadhyay B. Iridium‐Catalyzed Ligand‐Controlled Remote
para
‐Selective C−H Activation and Borylation of Twisted Aromatic Amides. Angew Chem Int Ed Engl 2022; 61:e202203539. [DOI: 10.1002/anie.202203539] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Indexed: 12/14/2022]
Affiliation(s)
- Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Anju Unnikrishnan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sayan Dey
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Mirja Md Mahamudul Hassan
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Saikat Guria
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Rama Nand Rai
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Raghavan B. Sunoj
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
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14
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Hoque ME, Bisht R, Unnikrishnan A, Dey S, Mahamudul Hassan MM, Guria S, Rai RN, Sunoj RB, Chattopadhyay B. Iridium‐Catalyzed Ligand‐Controlled Remote
para
‐Selective C−H Activation and Borylation of Twisted Aromatic Amides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Anju Unnikrishnan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sayan Dey
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Mirja Md Mahamudul Hassan
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Saikat Guria
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Rama Nand Rai
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Raghavan B. Sunoj
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
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15
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Sureshbabu P, Azeez S, Pattanaik K, Sabiah S, Kandasamy J. Synthesis of N‐Cbz Amides and Their Applications in the Transamidation Reactions at Room Temperature. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200076] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Popuri Sureshbabu
- IIT BHU: Indian Institute of Technology BHU Varanasi Chemistry Department of Chemistry, IIT BHU, VaranaVaranasi 221005 Varanasi INDIA
| | - Sadaf Azeez
- IIT BHU: Indian Institute of Technology BHU Varanasi Chemistry INDIA
| | | | | | - Jeyakumar Kandasamy
- Indian Institute of Technology (BHU) Chemistry Varanasi 221005 Varanasi INDIA
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16
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Lai M, Su F, Hu J, Wang M, Zhao M, Zhang G. Synthesis of N-Heteroarenemethyl Esters via C–C Bond Cleavage of Acyl Cyanides Under Transition Metal-Free Conditions. Front Chem 2022; 9:822625. [PMID: 35155384 PMCID: PMC8828493 DOI: 10.3389/fchem.2021.822625] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 12/15/2021] [Indexed: 01/24/2023] Open
Abstract
A practical method to synthesize N-heteroaryl esters from N-heteroaryl methanols with acyl cyanides via C–C bond cleavage without using any transition metal is demonstrated here. The use of Na2CO3/15-crown-5 couple enables access to a series of N-heteroaryl esters in high efficiency. This protocol is operationally simple and highly environmentally benign producing only cyanides as byproducts.
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17
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Kandasamy J, Azeez S, Shahul Hameed S, Popuri S. Controlled Reduction of Activated Primary and Secondary Amides into Aldehydes with Diisobutylaluminum Hydride. Org Biomol Chem 2022; 20:2048-2053. [DOI: 10.1039/d1ob02414k] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical method is disclosed for the reduction of activated primary and secondary amides into aldehydes using diisobutylaluminum hydride (DIBAL-H) in toluene. A wide range of aryl and alkyl N-Boc,...
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18
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Zhang X, Yang Y, Wang F, Zhou Z, Zhang H, Zhu Y. An Approach to the Synthesis of Electron-Rich and Hindered Esters and Its Application to the Synthesis of Acteoside. Org Lett 2021; 23:9210-9215. [PMID: 34779636 DOI: 10.1021/acs.orglett.1c03528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electron-rich esters are ubiquitously distributed in natural products and play a central role in bioactivities. Herein, we disclose an efficient, mild, and general esterification approach to the synthesis of these esters by employing gold(I)-catalyzed acylation reaction with alkyne-tethered mixed anhydrides and alcohols. This method can be applied to ester-bond formation in complex substrates and facilitates efficient synthesis of acteoside, which belongs to the family of phenylethanoid glycosides and possesses a broad range of bioactivities.
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Affiliation(s)
- Xiaojuan Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Re- search & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Yutong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Re- search & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Fuye Wang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Re- search & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Zhengbing Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Re- search & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Re- search & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Yugen Zhu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Provincial Center for Re- search & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
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19
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Hao Y, Zhou P, Niu K, Song H, Liu Y, Zhang J, Wang Q. Synthesis of Indole‐ and Pyrrole‐Fused Seven‐Membered Nitrogen Heterocycles via Acid‐Base Switchable Cyclization Involving Cleavage of Amide C−N Bonds. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yanke Hao
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Pan Zhou
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Kaikai Niu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Jingjing Zhang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
- College of Basic Science Tianjin Agricultural University Tianjin 300384 People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
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20
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Zhang Y, Ye X, Liu S, Chen W, Majeed I, Liu T, Zhu Y, Zeng Z. NaOTs-promoted transition metal-free C-N bond cleavage to form C-X (X = N, O, S) bonds. Org Biomol Chem 2021; 19:8566-8571. [PMID: 34550144 DOI: 10.1039/d1ob01409a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multifunctional transformation of amide C-N bond cleavage is reported. The protocol applies to benzamide, thioamide, alcohols, and mercaptan under similar reaction conditions catalyzed by NaOTs. It is noteworthy that NaOTs can not only be recycled and reused for up to three cycles without significant loss in catalytic activity, but also catalyze gram-grade reactions. This study provides a novel solution with mild conditions and a simple procedure for transformation of multiple amides.
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Affiliation(s)
- Yuqi Zhang
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
| | - Xiaojing Ye
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
| | - Sicheng Liu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
| | - Wei Chen
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
| | - Irfan Majeed
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
| | - Tingting Liu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
| | - Yulin Zhu
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
| | - Zhuo Zeng
- College of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China. .,Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences, China
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21
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Maity S, Roy A, Duari S, Biswas S, Elsharif AM, Biswas S. Brønsted Acid Mediated Nucleophilic Functionalization of Amides through Stable Amide C−N Bond Cleavage; One‐Step Synthesis of 2‐Substituted Benzothiazoles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Srabani Maity
- Department of Chemistry University of Calcutta 92, A. P. C. Road Kolkata 700009, W. B. India
| | - Arnab Roy
- Department of Chemistry University of Calcutta 92, A. P. C. Road Kolkata 700009, W. B. India
| | - Surajit Duari
- Department of Chemistry University of Calcutta 92, A. P. C. Road Kolkata 700009, W. B. India
| | - Subrata Biswas
- Department of Chemistry University of Calcutta 92, A. P. C. Road Kolkata 700009, W. B. India
| | - Asma M. Elsharif
- Department of Chemistry College of Science Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Srijit Biswas
- Department of Chemistry University of Calcutta 92, A. P. C. Road Kolkata 700009, W. B. India
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22
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Rahman MM, Szostak M. Synthesis of Sulfoxonium Ylides from Amides by Selective N-C(O) Activation. Org Lett 2021; 23:4818-4822. [PMID: 34096314 DOI: 10.1021/acs.orglett.1c01535] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The direct synthesis of sulfoxonium ylides from amides by selective N-C(O) cleavage is presented. The reaction proceeds through the nucleophilic addition of dimethylsulfoxonium methylide to the amide bond in acyclic twisted amides under exceedingly mild room temperature conditions. A variety of amides can be employed, and the protocol can be applied to the late-stage derivatization of pharmaceuticals. Mechanistic studies outline the relative order of reactivity of amides.
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Affiliation(s)
- Md Mahbubur Rahman
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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23
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Wang T, Wang Y, Xu K, Zhang Y, Guo J, Liu L. Transition‐Metal‐Free DMAP‐Mediated Aromatic Esterification of Amides with Organoboronic Acids. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tao Wang
- School of Chemistry and Chemical Engineering Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals Shangqiu Normal University Shangqiu Henan 476000 China
- School of Chemistry and Chemical Engineering Henan Key Laboratory of Biomolecular Recognition and Sensing Shangqiu Normal University Shangqiu Henan 476000 China
| | - Yanqing Wang
- School of Chemistry and Chemical Engineering Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals Shangqiu Normal University Shangqiu Henan 476000 China
| | - Kai Xu
- School of Chemistry and Chemical Engineering Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals Shangqiu Normal University Shangqiu Henan 476000 China
- School of Chemistry and Chemical Engineering Henan Key Laboratory of Biomolecular Recognition and Sensing Shangqiu Normal University Shangqiu Henan 476000 China
| | - Yuheng Zhang
- School of Chemistry and Chemical Engineering Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals Shangqiu Normal University Shangqiu Henan 476000 China
- School of Chemistry and Chemical Engineering Henan Key Laboratory of Biomolecular Recognition and Sensing Shangqiu Normal University Shangqiu Henan 476000 China
| | - Jiarui Guo
- School of Chemistry and Chemical Engineering Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals Shangqiu Normal University Shangqiu Henan 476000 China
- School of Chemistry and Chemical Engineering Henan Key Laboratory of Biomolecular Recognition and Sensing Shangqiu Normal University Shangqiu Henan 476000 China
| | - Lantao Liu
- School of Chemistry and Chemical Engineering Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals Shangqiu Normal University Shangqiu Henan 476000 China
- School of Chemistry and Chemical Engineering Henan Key Laboratory of Biomolecular Recognition and Sensing Shangqiu Normal University Shangqiu Henan 476000 China
- College of Chemistry Zhengzhou University Zhengzhou Henan 450001 China
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24
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Zheng Y, Zhao Y, Tao S, Li X, Cheng X, Jiang G, Wan X. Green Esterification of Carboxylic Acids Promoted by
tert
‐Butyl Nitrite. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100326] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yonggao Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Yanwei Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Suyan Tao
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Xingxing Li
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Xionglve Cheng
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Gangzhong Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
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25
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Shi Y, Liu X, Cao H, Bie F, Han Y, Yan P, Szostak R, Szostak M, Liu C. Conversion of esters to thioesters under mild conditions. Org Biomol Chem 2021; 19:2991-2996. [PMID: 33734267 DOI: 10.1039/d1ob00187f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report conversion of esters to thioesters via selective C-O bond cleavage/weak C-S bond formation under transition-metal-free conditions. The method is notable for a general and practical transition-metal-free system, broad substrate scope and excellent functional group tolerance. The strategy was successfully deployed in late-stage thioesterification, site-selective cross-coupling/thioesterification/decarbonylation and easy-to-handle gram scale thioesterification. Selectivity and computational studies were performed to gain insight into the formation of weak C-S bonds by C-O bond cleavage, which contrasts with the traditional trend of nucleophilic additions to carboxylic acid derivatives.
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Affiliation(s)
- Yijun Shi
- Shandong Lunan Coal Chemical Research Institute of Engineering and Technology, Zaozhuang University, 1 Bei'an Road, Zaozhuang, Shandong 277160, China.
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26
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Villoria-Del-Álamo B, Rojas-Buzo S, García-García P, Corma A. Zr-MOF-808 as Catalyst for Amide Esterification. Chemistry 2021; 27:4588-4598. [PMID: 33026656 DOI: 10.1002/chem.202003752] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/02/2020] [Indexed: 12/26/2022]
Abstract
In this work, zirconium-based metal-organic framework Zr-MOF-808-P has been found to be an efficient and versatile catalyst for amide esterification. Comparing with previously reported homogeneous and heterogeneous catalysts, Zr-MOF-808-P can promote the reaction for a wide range of primary, secondary and tertiary amides with n-butanol as nucleophilic agent. Different alcohols have been employed in amide esterification with quantitative yields. Moreover, the catalyst acts as a heterogeneous catalyst and could be reused for at least five consecutive cycles. The amide esterification mechanism has been studied on the Zr-MOF-808 at molecular level by in situ FTIR spectroscopic technique and kinetic study.
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Affiliation(s)
- Beatriz Villoria-Del-Álamo
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Sergio Rojas-Buzo
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
| | - Pilar García-García
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain.,Present address: Departamento de Ciencias Farmacéuticas, Facultad de Farmacia, CIETUS, IBSAL, University of Salamanca, Campus Miguel de Unamuno, 37007, Salamanca, Spain
| | - Avelino Corma
- Instituto de Tecnología Química, UPV-CSIC, Universitat Politècnica de València-Consejo Superior de, Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain
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27
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Chen J, Joseph D, Xia Y, Lee S. Amide/Ester Cross-Coupling via C–N/C–H Bond Cleavage: Synthesis of β-Ketoesters. J Org Chem 2021; 86:5943-5953. [DOI: 10.1021/acs.joc.0c02868] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jiajia Chen
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, People’s Republic of China
| | - Devaneyan Joseph
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, People’s Republic of China
| | - Sunwoo Lee
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
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28
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Niu ZJ, Li LH, Li XS, Liu HC, Shi WY, Liang YM. Formation of o-Allyl- and Allenyl-Modified Amides via Intermolecular Claisen Rearrangement. Org Lett 2021; 23:1315-1320. [PMID: 33534590 DOI: 10.1021/acs.orglett.0c04300] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We developed a new transition-metal-free intermolecular Claisen rearrangement process to introduce allyl and allenyl groups into the α position of tertiary amides. In this transformation, amides were activated by trifluoromethanesulfonic anhydride to produce the keteniminium ion intermediates that exhibit strong electrophilic activity. This atom-economical process delivers α position-modified amides under mild conditions in moderate to good yields and showcases a broad substrate compatibility.
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Affiliation(s)
- Zhi-Jie Niu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Lian-Hua Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xue-Song Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Hong-Chao Liu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Wei-Yu Shi
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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29
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Zheng L, Sun C, Xu W, Dushkin AV, Polyakov N, Su W, Yu J. Mechanically induced solvent-free esterification method at room temperature. RSC Adv 2021; 11:5080-5085. [PMID: 35424454 PMCID: PMC8694552 DOI: 10.1039/d0ra09437d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/12/2021] [Indexed: 01/23/2023] Open
Abstract
Herein, we describe two novel strategies for the synthesis of esters, as achieved under high-speed ball-milling (HSBM) conditions at room temperature. In the presence of I2 and KH2PO2, the reactions afford the desired esterification derivatives in 45% to 91% yields within 20 min of grinding. Meanwhile, using KI and P(OEt)3, esterification products can be obtained in 24% to 85% yields after 60 min of grinding. In addition, the I2/KH2PO2 protocol was successfully extended to the late-stage diversification of natural products showing the robustness of this useful approach. Further application of this method in the synthesis of inositol nicotinate was also discussed.
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Affiliation(s)
- Lei Zheng
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Chen Sun
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Wenhao Xu
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Alexandr V Dushkin
- Institute of Solid State Chemistry and Mechanochemistry Novosibirsk Russia
| | - Nikolay Polyakov
- Institute of Solid State Chemistry and Mechanochemistry Novosibirsk Russia
| | - Weike Su
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Jingbo Yu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology Hangzhou 310014 P. R. China
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30
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Siddiki SMAH, Rashed MN, Touchy AS, Jamil MAR, Jing Y, Toyao T, Maeno Z, Shimizu KI. Hydrolysis of amides to carboxylic acids catalyzed by Nb 2O 5. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02230f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient heterogeneous Nb2O5 catalytic system has been developed for industrially important and challenging amide hydrolysis reaction to carboxylic acid through cleavage of resonance stabilized amidic C–N bond.
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Affiliation(s)
| | | | | | - Md. A. R. Jamil
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Yuan Jing
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Takashi Toyao
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
| | - Zen Maeno
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Ken-ichi Shimizu
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
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31
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Uno H, Kawai K, Shiro M, Shibata N. Modular Synthesis of Medium-Sized Fluorinated and Nonfluorinated Heterocyclic Lactones by Sequential CN-Bond-Cleaving Ring Expansion under Pd Catalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03927] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hiroto Uno
- Department of Nanopharmaceutical Sciences & Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Koki Kawai
- Department of Nanopharmaceutical Sciences & Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku, Nagoya 466-8555, Japan
| | - Motoo Shiro
- Rigaku Corporation, 3-9-12, Matsubara-cho, Akishima-shi, Tokyo 196-8666, Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences & Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku, Nagoya 466-8555, Japan
- Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, 688 Yingbin Avenue, 321004 Jinhua, China
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32
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Huang C, Li J, Wang J, Zheng Q, Li Z, Tu T. Hydrogen-bond-assisted transition-metal-free catalytic transformation of amides to esters. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9883-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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33
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Wang Z, Matsumoto A, Maruoka K. Efficient cleavage of tertiary amide bonds via radical-polar crossover using a copper(ii) bromide/Selectfluor hybrid system. Chem Sci 2020; 11:12323-12328. [PMID: 34094440 PMCID: PMC8163011 DOI: 10.1039/d0sc05137c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023] Open
Abstract
A novel approach for the efficient cleavage of the amide bonds in tertiary amides is reported. Based on the selective radical abstraction of a benzylic hydrogen atom by a CuBr2/Selectfluor hybrid system followed by a selective cleavage of an N-C bond, an acyl fluoride intermediate is formed. This intermediate may then be derivatized in a one-pot fashion. The reaction proceeds under mild conditions and exhibits a broad substrate scope with respect to the tertiary amide moiety as well as to nitrogen, oxygen, and carbon nucleophiles for the subsequent derivatization. Mechanistic studies suggest that the present reaction proceeds via a radical-polar crossover process that involves benzylic carbon radicals generated by the selective radical abstraction of a benzylic hydrogen atom by the CuBr2/Selectfluor hybrid system. Furthermore, a synthetic application of this method for the selective cleavage of peptides is described.
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Affiliation(s)
- Zhe Wang
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo Kyoto 606-8501 Japan
| | - Akira Matsumoto
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo Kyoto 606-8501 Japan
| | - Keiji Maruoka
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo Kyoto 606-8501 Japan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 China
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34
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Idris MA, Lee S. Palladium-Catalyzed Amide N–C Hiyama Cross-Coupling: Synthesis of Ketones. Org Lett 2020; 22:9190-9195. [DOI: 10.1021/acs.orglett.0c03260] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Muhammad Aliyu Idris
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
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35
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Ding H, Qi WY, Zhen JS, Ding Q, Luo Y. Visible light-mediated transition metal-free esterification of amides with boronic acids. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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37
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Wu N, Li C, Mi J, Zheng Y, Xu Z. A Strategy for Amide to β-Oxo Ester Transformation via N-Alkenoxypyridinium Salts as the Activator and H2O as the Nucleophile. Org Lett 2020; 22:7118-7122. [DOI: 10.1021/acs.orglett.0c02457] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nan Wu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou 221004, China
| | - Chuang Li
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou 221004, China
| | - Jiajia Mi
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou 221004, China
| | - Yan Zheng
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou 221004, China
| | - Zhou Xu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou 221004, China
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38
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Hirai T, Kato D, Mai BK, Katayama S, Akiyama S, Nagae H, Himo F, Mashima K. Esterification of Tertiary Amides: Remarkable Additive Effects of Potassium Alkoxides for Generating Hetero Manganese-Potassium Dinuclear Active Species. Chemistry 2020; 26:10735-10742. [PMID: 32346933 PMCID: PMC7496701 DOI: 10.1002/chem.202001447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Indexed: 02/03/2023]
Abstract
A catalyst system of mononuclear manganese precursor 3 combined with potassium alkoxide served as a superior catalyst compared with our previously reported manganese homodinuclear catalyst 2 a for esterification of not only tertiary aryl amides, but also tertiary aliphatic amides. On the basis of stoichiometric reactions of 3 and potassium alkoxide salt, kinetic studies, and density functional theory (DFT) calculations, we clarified a plausible reaction mechanism in which in situ generated manganese-potassium heterodinuclear species cooperatively activates the carbonyl moiety of the amide and the OH moiety of the alcohols. We also revealed details of the reaction mechanism of our previous manganese homodinuclear system 2 a, and we found that the activation free energy (ΔG≠ ) for the manganese-potassium heterodinuclear complex catalyzed esterification of amides is lower than that for the manganese homodinuclear system, which was consistent with the experimental results. We further applied our catalyst system to deprotect the acetyl moiety of primary and secondary amines.
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Affiliation(s)
- Takahiro Hirai
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Daiki Kato
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Binh Khanh Mai
- Department of Organic ChemistryArrhenius LaboratoryStockholm UniversitySE-106 91StockholmSweden
| | - Shoichiro Katayama
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Shoko Akiyama
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Haruki Nagae
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Fahmi Himo
- Department of Organic ChemistryArrhenius LaboratoryStockholm UniversitySE-106 91StockholmSweden
| | - Kazushi Mashima
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
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39
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Kandasamy M, Amalraj AJJ, Perumal G, Ganesan B, Senadi GC, Lin WY. Continuous flow as a benign strategy for the synthesis of Thioesters via selective C-N bond cleavage. J Flow Chem 2020. [DOI: 10.1007/s41981-020-00090-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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40
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Zhang ZB, Yang Y, Yu ZX, Xia JB. Lewis Base-Catalyzed Amino-Acylation of Arylallenes via C–N Bond Cleavage: Reaction Development and Mechanistic Studies. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01000] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zheng-Bing Zhang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), University of Chinese Academy of Sciences, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yusheng Yang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhi-Xiang Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Ji-Bao Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), University of Chinese Academy of Sciences, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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41
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Li JF, Wang YF, Wu YY, Liu WJ, Wang JW. Nickel-Catalyzed Esterification of Amides Under Mild Conditions. Catal Letters 2020. [DOI: 10.1007/s10562-019-02966-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Hollanders C, Renders E, Gadais C, Masullo D, Van Raemdonck L, Wybon CCD, Martin C, Herrebout WA, Maes BUW, Ballet S. Zn-Catalyzed Nicotinate-Directed Transamidations in Peptide Synthesis. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05074] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Charlie Hollanders
- Organic Chemistry, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Evelien Renders
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Charlène Gadais
- Organic Chemistry, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Dario Masullo
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Laurent Van Raemdonck
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Clarence C. D. Wybon
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Charlotte Martin
- Organic Chemistry, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Wouter A. Herrebout
- Molecular Spectroscopy, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Bert U. W. Maes
- Organic Synthesis, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
| | - Steven Ballet
- Organic Chemistry, Departments of Chemistry and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
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43
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Wang M, Yang Y, Song B, Yin L, Yan S, Li Y. Selective Insertion of Alkynes into C-C σ Bonds of Indolin-2-ones: Transition-Metal-Free Ring Expansion Reactions to Seven-Membered-Ring Benzolactams or Chromone Derivatives. Org Lett 2020; 22:155-159. [PMID: 31860320 DOI: 10.1021/acs.orglett.9b04081] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
An unprecedented ring expansion reaction of indolin-2-ones with alkynyl ketones under transition-metal-free conditions has been developed. Base-promoted selective cleavage of a C-C σ bond of the amide is the key in this process, which provides a straightforward and efficient way to synthesize seven-membered-ring benzolactams or chromone derivatives. The significant advantages of this method include readily accessible starting materials, wide scope and functional group tolerance, and high atom economy.
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Affiliation(s)
- Mengdan Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Progresses, School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Yajie Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Progresses, School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Bo Song
- Shanghai Key Laboratory of Green Chemistry and Chemical Progresses, School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Liqiang Yin
- Shanghai Key Laboratory of Green Chemistry and Chemical Progresses, School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Shuhui Yan
- Shanghai Key Laboratory of Green Chemistry and Chemical Progresses, School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Yanzhong Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Progresses, School of Chemistry and Molecular Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
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44
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Chen J, Xia Y, Lee S. Coupling of amides with ketones via C–N/C–H bond cleavage: a mild synthesis of 1,3-diketones. Org Chem Front 2020. [DOI: 10.1039/d0qo00797h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Amides react with enolizable ketones to give 1,3-diketones via C–N cleavage of amides and deprotonation of ketones.
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Affiliation(s)
- Jiajia Chen
- Department of Chemistry
- Chonnam National University
- Gwangju
- Republic of Korea
- College of Chemistry and Materials Engineering
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Sunwoo Lee
- Department of Chemistry
- Chonnam National University
- Gwangju
- Republic of Korea
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45
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Li G, Szostak M. Kinetically Controlled, Highly Chemoselective Acylation of Functionalized Grignard Reagents with Amides by N−C Cleavage. Chemistry 2019; 26:611-615. [DOI: 10.1002/chem.201904678] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/05/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Guangchen Li
- Department of ChemistryRutgers University 73 Warren Street Newark NJ 07102 USA
| | - Michal Szostak
- Department of ChemistryRutgers University 73 Warren Street Newark NJ 07102 USA
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46
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Li G, Szostak M. Transition-Metal-Free Activation of Amides by N-C Bond Cleavage. CHEM REC 2019; 20:649-659. [PMID: 31833633 DOI: 10.1002/tcr.201900072] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 11/07/2019] [Accepted: 11/11/2019] [Indexed: 12/11/2022]
Abstract
The amide bond N-C activation represents a powerful strategy in organic synthesis to functionalize the historically inert amide linkage. This personal account highlights recent remarkable advances in transition-metal-free activation of amides by N-C bond cleavage, focusing on both (1) mechanistic aspects of ground-state-destabilization of the amide bond enabling formation of tetrahedral intermediates directly from amides with unprecedented selectivity, and (2) synthetic utility of the developed transformations. Direct nucleophilic addition to amides enables a myriad of powerful methods for the formation of C-C, C-N, C-O and C-S bonds, providing a straightforward and more synthetically useful alternative to acyl-metals.
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Affiliation(s)
- Guangchen Li
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, United States
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, United States
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47
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Mai WP, Liu Y, Sui HD, Xiao YM, Mao P, Lu K. A Novel Ketonitrile Synthesis by Palladium-Catalyzed Carbonylative Coupling Reactions of Amides with Arylboronic Acids. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Wen-Peng Mai
- School of Materials and Chemical Engineering; Henan University of Engineering; 450006 Zhengzhou China
- School of Chemistry and Chemical Engineering; Henan University of Technology; 450001 Zhengzhou China
| | - Yang Liu
- School of Chemistry and Chemical Engineering; Henan University of Technology; 450001 Zhengzhou China
| | - Hong-Dai Sui
- School of Chemistry and Chemical Engineering; Henan University of Technology; 450001 Zhengzhou China
| | - Yong-Mei Xiao
- School of Chemistry and Chemical Engineering; Henan University of Technology; 450001 Zhengzhou China
| | - Pu Mao
- School of Chemistry and Chemical Engineering; Henan University of Technology; 450001 Zhengzhou China
| | - Kui Lu
- School of Materials and Chemical Engineering; Henan University of Engineering; 450006 Zhengzhou China
- School of Chemistry and Chemical Engineering; Henan University of Technology; 450001 Zhengzhou China
- School of Chemical Engineering and Food Science; Zhengzhou Institute of Technology; 450044 Zhengzhou China
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48
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Ao C, Yang X, Jia S, Xu X, Yuan Y, Zhang D, Hu W. Zinc-Catalyzed Alkyne-Carbonyl Metathesis of Ynamides with Isatins: Stereoselective Access to Fully Substituted Alkenes. J Org Chem 2019; 84:15331-15342. [PMID: 31702914 DOI: 10.1021/acs.joc.9b02350] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A zinc-catalyzed intermolecular alkyne-carbonyl metathesis reaction of ynamides with isatins followed by an amide to ester conversion has been developed, which produces the indolone derivatives with a fully substituted alkene species in good to high yields. The salient features of this reaction include the following: mild reaction conditions, an inexpensive zinc catalyst, a broad substrate scope, the excellent regiocontrol and stereoselectivity, and amenable to the gram scale.
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Affiliation(s)
- Chaoqun Ao
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Xiaohan Yang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Shikun Jia
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Xinfang Xu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Yanqiu Yuan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Dan Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Wenhao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
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49
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Xu M, Bullard KK, Nicely AM, Gutekunst WR. Resonance promoted ring-opening metathesis polymerization of twisted amides. Chem Sci 2019; 10:9729-9734. [PMID: 32055341 PMCID: PMC6993617 DOI: 10.1039/c9sc03602d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 08/30/2019] [Indexed: 12/31/2022] Open
Abstract
The living ring-opening metathesis polymerization (ROMP) of an unsaturated twisted amide using the third-generation Grubbs initiator is described. Unlike prior examples of ROMP monomers that rely on angular or steric strain for propagation, this system is driven by resonance destabilization of the amide that arises from geometric constraints of the bicyclic framework. Upon ring-opening, the amide can rotate and rehybridize to give a stabilized and planar conjugated system that promotes living propagation. The absence of other strain elements in the twisted amide is supported by the inability of a carbon analogue of the monomer to polymerize and computational studies that find resonance destabilization accounts for 11.3 kcal mol-1 of the overall 12.0 kcal mol-1 ring strain. The twisted amide polymerization is capable of preparing high molecular weight polymers rapidly at room temperature, and post-polymerization modification combined with 2D NMR spectroscopy confirms a regioirregular polymer microstructure.
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Affiliation(s)
- Mizhi Xu
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
| | - Krista K Bullard
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
| | - Aja M Nicely
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
| | - Will R Gutekunst
- School of Chemistry and Biochemistry , Georgia Institute of Technology , 901 Atlantic Drive NW , Atlanta , Georgia 30332 , USA .
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50
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Fang WY, Zha GF, Qin HL. Making Carbonyls of Amides Nucleophilic and Hydroxyls of Alcohols Electrophilic Mediated by SO2F2 for Synthesis of Esters from Amides. Org Lett 2019; 21:8657-8661. [DOI: 10.1021/acs.orglett.9b03274] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wan-Yin Fang
- State Key Laboratory of Silicate Materials for Architectures and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, P. R. China
| | - Gao-Feng Zha
- State Key Laboratory of Silicate Materials for Architectures and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, P. R. China
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, P. R. China
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