1
|
Wang XZ, Huang HG, Liu WB. Pd/Cu Dual Metal-Catalyzed Regioselective [2 + 2 + 2] Cycloaddition of Malononitriles with Alkynes to Densely Substituted Pyridines. Org Lett 2024. [PMID: 39172919 DOI: 10.1021/acs.orglett.4c02443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
Transition metal-catalyzed [2 + 2 + 2] cycloaddition of nitriles and two alkynes is an efficient method for assembling pyridines. However, examples employing palladium catalysis have rarely been disclosed, and the processes of reactivity and selectivity remain unclear. We report here a palladium/copper dual metal-catalyzed [2 + 2 + 2] cycloaddition of diynyl-tethered malononitriles and terminal alkynes to synthesize densely substituted pyridines. This method features a good substrate scope, synthetically useful yields, and perfect regioselectivity. The derivatization of the pyridine products demonstrates the potential application of this method in synthesizing heterocycles and as ligands in photocatalysis. Preliminary mechanistic studies suggest that the reaction undergoes aza-oxidative cycloaddition of Pd(0) with nitrile and alkyne, followed by alkyne insertion and reductive elimination. The presence of copper is crucial to its reactivity and regioselectivity.
Collapse
Affiliation(s)
- Xing-Zhen Wang
- Hubei Research Center of Fundamental Science-Chemistry, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, and College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Hong-Gui Huang
- Hubei Research Center of Fundamental Science-Chemistry, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, and College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Wen-Bo Liu
- Hubei Research Center of Fundamental Science-Chemistry, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, and College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| |
Collapse
|
2
|
Sawano T, Urasawa K, Sugiura R, Aoyama K, Sugahara K, Tanaka K, Hosaka H, Kaneko M, Yoshida Y, Ishikawa E, Yoshikawa T, Sakata K, Takeuchi R. Iridium-Catalyzed [2 + 2 + 2] Cycloaddition of Bithiophen-Linked Diynes with Nitriles: Scope and Mechanistic Study with Quantum Chemical Calculation. J Org Chem 2024; 89:9473-9487. [PMID: 38889001 DOI: 10.1021/acs.joc.4c00754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
We report a simple and atom-efficient method for the synthesis of bithiophene-fused isoquinolines by iridium-catalyzed [2 + 2 + 2] cycloaddition of bithiophene-linked diynes with nitriles. All three structural isomers of bithiophene-linked diynes underwent [2 + 2 + 2] cycloaddition, and the trend in the reactivity for cycloaddition was diyne 1 = diyne 3 > diyne 2. Dibenzothiophene-linked diyne also reacted with nitriles to form a variety of cycloadducts. Cycloaddition of bithiophene-linked diynes with alkynes and an isocyanate formed naphthodithiophenes and a 2-pyridone derivative, respectively. Cycloadducts bearing a 2-aminopyridine moiety and benzothiophene rings showed intense fluorescence at around 530 nm and gave a fluorescence quantum yield of 0.44. Furthermore, quantum chemical calculations provided insight into the origin of the difference in reactivity of three bithiophene-linked diynes. The different reactivities of the three diynes 1-3 are believed to originate from the step where an iridacyclopentadiene reacts with a coordinated nitrile to form azairidabicyclo[3.2.0]heptatriene. HOMOs of iridacyclopentadiene play a decisive role in this step.
Collapse
Affiliation(s)
- Takahiro Sawano
- Department of Materials for Energy, Shimane University, 1060 Nishikawatsu-cho, Matsue, Shimane 690-8504, Japan
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Kazuki Urasawa
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Ryosuke Sugiura
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Kaito Aoyama
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Kaito Sugahara
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Koito Tanaka
- Faculty of Pharmaceutical Sciences, Toho University, Miyama, Funabashi, Chiba 274-8510, Japan
| | - Hiromi Hosaka
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Masami Kaneko
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Yuzo Yoshida
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Eri Ishikawa
- Department of Applied Chemistry, Chubu University, 1200 Matsumoto-cho, Kasugai 487-8501, Japan
| | - Takeshi Yoshikawa
- Faculty of Pharmaceutical Sciences, Toho University, Miyama, Funabashi, Chiba 274-8510, Japan
| | - Ken Sakata
- Faculty of Pharmaceutical Sciences, Toho University, Miyama, Funabashi, Chiba 274-8510, Japan
| | - Ryo Takeuchi
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| |
Collapse
|
3
|
El-Arid S, Lenihan JM, Jacobsen A, Beeler AB, Grinstaff MW. Accessing Cyclobutane Polymers: Overcoming Synthetic Challenges via Efficient Continuous Flow [2 + 2] Photopolymerization. ACS Macro Lett 2024; 13:607-613. [PMID: 38695337 DOI: 10.1021/acsmacrolett.4c00083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
We report an improved and efficient method to prepare well-defined, structurally complex truxinate cyclobutane polymers via a thioxanthone sensitized solution state [2 + 2] photopolymerization. Monomers with varying electron density and structure polymerize in good to excellent yields to afford a library of 42 polyesters. Monomers with internal olefin separation distances of greater than 5 Å undergo polymerization via intermolecular [2 + 2] photocycloaddition readily, as opposed to the intramolecular [2 + 2] photocycloaddition observed in monomers with olefins in closer proximity. Use of a continuous flow reactor decreases reaction time, increases polymer molecular weight, and decreases dispersity compared to batch reactions. Furthermore, under continuous flow, polymerization is readily scalable beyond what is possible with batch reactions. This advancement ushers truxinate cyclobutane-based polyesters, which have been historically limited to a few examples and only research scale quantities, to the forefront of development as new materials for potential use across industry sectors.
Collapse
|
4
|
Qin Q, Cheng Z, Jiao N. Recent Applications of Trifluoromethanesulfonic Anhydride in Organic Synthesis. Angew Chem Int Ed Engl 2023; 62:e202215008. [PMID: 36541579 DOI: 10.1002/anie.202215008] [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: 10/12/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
Trifluoromethanesulfonic anhydride has been widely used in synthetic organic chemistry, not only for the conversion of various oxygen-containing compounds to the triflates, but also for the electrophilic activation and further conversion of amides, sulfoxides, and phosphorus oxides. In recent years, the utilization of Tf2 O as an activator for nitrogen-containing heterocycles, nitriles and nitro groups has become a promising tool for the development of new valuable methods with considerable success. In addition, Tf2 O has been used as an efficient radical trifluoromethylation and trifluoromethylthiolation reagent due to the contained SO2 CF3 fragment, and significant progress has been made in this area. This review summarizes the recent progress in the applications of Tf2 O in the above two aspects, and aims to illustrate the role and potential application of this reagent in organic synthesis.
Collapse
Affiliation(s)
- Qixue Qin
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong, 266109, China
| | - Zengrui Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China.,Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China
| |
Collapse
|
5
|
Sahoo AK, Rakshit A, Pan A, Dhara HN, Patel BK. Visible/solar-light-driven thiyl-radical-triggered synthesis of multi-substituted pyridines. Org Biomol Chem 2023; 21:1680-1691. [PMID: 36723155 DOI: 10.1039/d3ob00009e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A light-triggered synthesis of thio-functionalized pyridines is demonstrated using γ-ketodinitriles, thiols, and eosin Y as the photocatalyst. The reaction proceeds via the selective attack on one of the cyano groups by an in situ generated thiyl radical. The reaction also proceeds with nearly equal efficiency using direct sunlight. Large-scale synthesis and a few useful synthetic transformations of the substituted pyridines are also performed.
Collapse
Affiliation(s)
- Ashish Kumar Sahoo
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India.
| | - Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India.
| | - Avishek Pan
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India.
| | - Hirendra Nath Dhara
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India.
| | - Bhisma K Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Assam, India.
| |
Collapse
|
6
|
Dhara HN, Rakshit A, Alam T, Sahoo AK, Patel BK. Visible-Light-Mediated Solvent-Switched Photosensitizer-Free Synthesis of Polyfunctionalized Quinolines and Pyridines. Org Lett 2023; 25:471-476. [PMID: 36637219 DOI: 10.1021/acs.orglett.2c04027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A solvent (2,2,2-trifluoroethanol (TFE) vs ethyl alcohol (EtOH)) switched synthesis of quinolines and pyridines is illustrated from (E)-2-(1,3-diphenylallylidene)malononitriles via a Pd(II)-catalyzed photochemical process. The active catalyst [L2Pd(0)] generated serves as an exogenous photosensitizer. The process offers predominantly Z-alkenylated quinolines and pyridines in TFE and EtOH, respectively. Furthermore, large-scale synthesis and a few interesting post-synthetic modifications have been demonstrated.
Collapse
Affiliation(s)
- Hirendra Nath Dhara
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Tipu Alam
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Ashish Kumar Sahoo
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Bhisma K Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| |
Collapse
|
7
|
Sawano T, Takamura K, Yoshikawa T, Murata K, Koga M, Yamada R, Saito T, Tabata K, Ishii Y, Kashihara W, Nishihara T, Tanabe K, Suzuki T, Takeuchi R. Synthesis of azafluoranthenes by iridium-catalyzed [2 + 2 + 2] cycloaddition and evaluation of their fluorescence properties. Org Biomol Chem 2023; 21:323-331. [PMID: 36530147 DOI: 10.1039/d2ob01921c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report a method for the synthesis of azafluoranthenes under neutral reaction conditions in a highly atom-economical manner by the iridium-catalyzed [2 + 2 + 2] cycloaddition of 1,8-dialkynylnaphthalenes with nitriles. A variety of nitriles react with methyl- or phenyl-substituted 1,8-dialkynylnaphthalenes to give a wide range of azafluoranthenes. Azafluoranthenes bearing an amino group show intense fluorescence at around 500 nm. Comparison of the fluorescence properties of amine-substituted azafluoranthenes with related compounds revealed the importance of the amine moiety for obtaining a high fluorescence quantum yield. The choice of the solvent affected the emission maxima and the fluorescence quantum yield. Azafluoranthenes bearing pyrrolidine exhibited blue-shifted emission bands in a non-polar solvent and gave a fluorescence quantum yield of 0.76 in toluene. A Lippert-Mataga plot and computational studies provide insight into the origin of the fluorescence of azafluoranthenes. Furthermore, cellular experiments using human breast adenocarcinoma cells SK-BR-3 demonstrated the feasibility of using azafluoranthenes as fluorescent probes.
Collapse
Affiliation(s)
- Takahiro Sawano
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Kaho Takamura
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Tomoka Yoshikawa
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Kayo Murata
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Marina Koga
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Risa Yamada
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Takahide Saito
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Kazumasa Tabata
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Yugo Ishii
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Wataru Kashihara
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Tatsuya Nishihara
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Kazuhito Tanabe
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Tadashi Suzuki
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| | - Ryo Takeuchi
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan.
| |
Collapse
|
8
|
Kato Y, Yoshino T, Gao M, Hasegawa JY, Kojima M, Matsunaga S. Iron/Photosensitizer Hybrid System Enables the Synthesis of Polyaryl-Substituted Azafluoranthenes. J Am Chem Soc 2022; 144:18450-18458. [PMID: 36167469 DOI: 10.1021/jacs.2c06993] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photosensitization of organometallics is a privileged strategy that enables challenging transformations in transition-metal catalysis. However, the usefulness of such photocatalyst-induced energy transfer has remained opaque in iron-catalyzed reactions despite the intriguing prospects of iron catalysis in synthetic chemistry. Herein, we demonstrate the use of iron/photosensitizer-cocatalyzed cycloaddition to synthesize polyarylpyridines and azafluoranthenes, which have been scarcely accessible using the established iron-catalyzed protocols. Mechanistic studies indicate that triplet energy transfer from the photocatalyst to a ferracyclic intermediate facilitates the thermally demanding nitrile insertion and accounts for the distinct reactivity of the hybrid system. This study thus provides the first demonstration of the role of photosensitization in overcoming the limitations of iron catalysis.
Collapse
Affiliation(s)
- Yoshimi Kato
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.,Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Sapporo 060-0812, Japan
| | - Min Gao
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Jun-Ya Hasegawa
- Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan
| | - Masahiro Kojima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.,Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Sapporo 060-0812, Japan
| |
Collapse
|
9
|
Rakshit A, Dhara HN, Sahoo AK, Patel BK. The Renaissance of Organo Nitriles in Organic Synthesis. Chem Asian J 2022; 17:e202200792. [PMID: 36047749 DOI: 10.1002/asia.202200792] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/31/2022] [Indexed: 11/11/2022]
Abstract
In the arena of functional group-oriented organic synthesis, the nitrile or cyano functionality is of immense importance. The presence of nucleophilic N -atom, π-coordinating ability of the triple bond, and electrophilic C-center imparts unique and interesting reactivity. Owing to the ability of the nitrile to transform into various other functional groups or intermediates, the chemistry is very rich and diverse. In particular, the involvement of nitrile in numerous organic reactions such as inter- or intramolecular alkyne insertion, [2 + 2 + 2] cycloaddition with alkynes, [3 + 2] cycloaddition with azides, [4 + 2] cycloaddition with diene allow the synthesis of many important carbocycles and heterocycles. Furthermore, the nitrile serves as a directing group in many C-H bond functionalization reactions to introduce diverse functionality and participate as a radical acceptor in radical cascade strategies to obtain a large variety of functional molecules. This review mainly focuses on the reactivity and diverse synthetic application of the nitrile including C-H bond functionalization, alkyne insertion, cycloaddition, and thermal or photochemical cascade strategy. The objective of the current review aims at bringing out the striking collection of various nitrile-triggered organic transformations.
Collapse
Affiliation(s)
- Amitava Rakshit
- IIT Guwahati: Indian Institute of Technology Guwahati, Chemistry, INDIA
| | | | | | - Bhisma K Patel
- Indian Institute of Technology Guwahati, Chemistry, North Guwahati-781 039, 781 039, Guwahati, INDIA
| |
Collapse
|
10
|
Patel AK, Rathor SS, Samanta S. Regioselective access to di- and trisubstituted pyridines via a metal-oxidant-solvent-free domino reaction involving 3-chloropropiophenones. Org Biomol Chem 2022; 20:6759-6765. [PMID: 35972042 DOI: 10.1039/d2ob01193j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A remarkable metal-oxidant-solvent- and base-free domino route for regioselective access to a wide range of 2,4-di- and 2,3,4/6-trisubstituted pyridines including carbo- and heterocyclic fused pyridines is reported. This [3C + 2C + 1N] cyclization reaction occurs between 3-chloropropiophenones (3C units), enolizable acyclic/cyclic ketones (2C sources) and NH4OAc as a robust N source under neat conditions under an open atmosphere, producing new C=C and C=N-C bonds in highly chemo- and regioselective manners. Interestingly, this eco-friendly method has many positive features: excellent functional group tolerance, broad substrate scope, good to excellent regioselectivities, promising yields, no-unwanted products, neutral reaction conditions and appropriateness for large-scale synthesis. Mechanism studies reveal that the in situ generated β-amino ketone from 3-chloropropiophenone and an ammonium salt undergoes C=N bond formation with a ketone followed by an intramolecular cyclization process (C=C bond), which are the decisive steps for pyridine synthesis.
Collapse
Affiliation(s)
- Ashvani Kumar Patel
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Shikha Singh Rathor
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| |
Collapse
|
11
|
Llobat A, Escorihuela J, Ramírez de Arellano C, Fustero S, Medio-Simón M. Intramolecular rhodium-catalysed [2 + 2 + 2] cycloaddition of linear chiral N-bridged triynes: straightforward access to fused tetrahydroisoquinoline core. Org Biomol Chem 2022; 20:2433-2445. [PMID: 35274117 DOI: 10.1039/d2ob00340f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A route for the preparation of merged symmetrical tetrahydroisoquinolines with central chirality through a rhodium-catalyzed intramolecular [2 + 2 + 2] cycloaddition involving enantiopure triynes as substrates is described. The results show that linear triynes lacking a 3-atom tether can undergo efficient cyclisation. The N-tethered 1,7,13-triynes used in our approach were easily prepared from readily accessible chiral homopropargyl amides, the basic building blocks in our approach, which were efficiently obtained by diastereoselective addition of propargyl magnesium bromide to Ellman imines. Additional substitution at the benzene rings could be attained when substituted triynes at the terminal triple bonds were employed, giving access to more complex tetrahydroisoquinolines after the rhodium-catalyzed intramolecular [2 + 2 + 2] cycloaddition. Among the different transition-metal catalysts, the Wilkinson complex (RhCl(PPh3)3) afforded higher yields in the cyclisation of linear triynes; however, triynes bearing a Br substituent at the terminal positions underwent the cyclisation more efficiently in the presence of [RhCl(CO)2]2.
Collapse
Affiliation(s)
- Alberto Llobat
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Carmen Ramírez de Arellano
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Santos Fustero
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Mercedes Medio-Simón
- Departamento de Química Orgánica, Universitat de València, Avda. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| |
Collapse
|
12
|
Cai J, Cen K, Usman M, Shen W, Liu M, Yang R. A review for the assembly of multi-substituted pyridines via Co-catalyzed [2+2+2] cycloaddition with nitriles. Org Biomol Chem 2022; 20:7391-7404. [DOI: 10.1039/d2ob01344d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the recent years, many methods for the facile synthesis of pyridines and their derivatives have been developed. The [2+2+2] cycloaddition reaction of alkynes and nitriles catalyzed by transition metals...
Collapse
|
13
|
Chai J, Nie Y, Wang Z, Cheng L, Liu YG, Wu J. Metal Free Access to Polysubstituted Pyrimidines via Nitrile Activation and [2+2+2] Cycloaddition. Chemistry 2021; 27:17565-17569. [PMID: 34626013 DOI: 10.1002/chem.202103219] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Indexed: 11/08/2022]
Abstract
Tf2 O mediated intermolecular / intramolecular [2+2+2] cycloaddition between alkynes and nitriles has been developed for efficient construction of polysubstituted pyrimidines and bicyclopyrimidines. In presence of Tf2 O, aza-allene species were generated in situ through nitrile activation and subsequently participated in the [2+2+2] cycloaddition, which was fully supported by deuteration experiments. The reaction had good substrate extensibility with moderate to excellent yield including trimethylsilylalkynes. The method was utilized as a synthetic tool in the preparation of a luminescent metal complex.
Collapse
Affiliation(s)
- Jinkui Chai
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Yu Nie
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Zhao Wang
- Henan University of Animal Husbandry and Economy, Zhengzhou, 450001, P. R. China
| | - Li Cheng
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Ying-Guo Liu
- Division of Molecular Catalysis & Synthesis, Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Junliang Wu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China
| |
Collapse
|
14
|
Harper JL, Felten S, Stolley RM, Hegg AS, Cheong PHY, Louie J. Origins of Regio- and Chemoselectivity in Iron-PDAI-Catalyzed [2+2+2] Cycloaddition Syntheses of 4,6-Disubstituted 2-Aminopyridines. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03871] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jordan L. Harper
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Stephanie Felten
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Ryan M. Stolley
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Alexander S. Hegg
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Paul H.-Y. Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Janis Louie
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| |
Collapse
|
15
|
Cobalt-catalyzed regioselective cycloaddition of unsymmetric diynes and nitriles to form substituted pyridines. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
16
|
Huh DN, Cheng Y, Frye CW, Egger DT, Tonks IA. Multicomponent syntheses of 5- and 6-membered aromatic heterocycles using group 4-8 transition metal catalysts. Chem Sci 2021; 12:9574-9590. [PMID: 34349931 PMCID: PMC8293814 DOI: 10.1039/d1sc03037j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 06/28/2021] [Indexed: 12/31/2022] Open
Abstract
In this Perspective, we discuss recent syntheses of 5- and 6-membered aromatic heterocycles via multicomponent reactions (MCRs) that are catalyzed by group 4-8 transition metals. These MCRs can be categorized based on the substrate components used to generate the cyclized product, as well as on common mechanistic features between the catalyst systems. These particular groupings are intended to highlight mechanistic and strategic similarities between otherwise disparate transition metals and to encourage future work exploring related systems with otherwise-overlooked elements. Importantly, in many cases these early- to mid-transition metal catalysts have been shown to be as effective for heterocycle syntheses as the later (and more commonly implemented) group 9-11 metals.
Collapse
|
17
|
Cho IY, Kim WG, Jeon JH, Lee JW, Seo JK, Seo J, Hong SY. Nickelocene as an Air- and Moisture-Tolerant Precatalyst in the Regioselective Synthesis of Multisubstituted Pyridines. J Org Chem 2021; 86:9328-9343. [PMID: 34190562 DOI: 10.1021/acs.joc.1c00577] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Ni(COD)2-catalyzed cycloaddition reactions to access pyridines have been extensively studied. However, this catalyst typically requires drying procedures and inert-atmosphere techniques for the reactions. Herein, we report operationally simple nickel(0) catalysis to access substituted pyridines from various nitriles and 1,6-diynes without the aid of air-free techniques. The Ni-Xantphos-based catalytic manifold is tolerant to air, moisture, and heat while promoting the [2 + 2 + 2] cycloaddition reactions with high reaction yields and broad substrate scope. In addition, we disclose that not only the steric effect but also the frontier molecular orbital interactions can play a critical role in determining the regiochemical outcome of nickel-catalyzed [2 + 2 + 2] cycloaddition for the synthesis of substituted pyridines.
Collapse
Affiliation(s)
| | - Woo Gyum Kim
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | | | | | | | - Jongcheol Seo
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | | |
Collapse
|
18
|
Wang CS, Sun Q, García F, Wang C, Yoshikai N. Robust Cobalt Catalyst for Nitrile/Alkyne [2+2+2] Cycloaddition: Synthesis of Polyarylpyridines and Their Mechanochemical Cyclodehydrogenation to Nitrogen-Containing Polyaromatics*. Angew Chem Int Ed Engl 2021; 60:9627-9634. [PMID: 33559370 DOI: 10.1002/anie.202017220] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Indexed: 12/16/2022]
Abstract
The transition-metal-catalyzed [2+2+2] cycloaddition of nitriles and alkynes is an established synthetic approach to pyridines; however, these cycloadditions often rely on the use of tethered diynes or cyanoalkynes as one of the reactants. Thus, examples of efficient, fully intermolecular catalytic [2+2+2] pyridine synthesis, especially those employing unactivated nitriles and internal alkynes leading to pentasubstituted pyridines, remain scarce. Herein, we report on simple and inexpensive catalytic systems based on cobalt(II) iodide, 1,3-bis(diphenylphosphino)propane, and Zn that promote [2+2+2] cycloaddition of various nitriles and diarylacetylenes for the synthesis of a broad range of polyarylated pyridines. DFT studies support a reaction pathway involving oxidative coupling of two alkynes, insertion of the nitrile into a cobaltacyclopentadiene, and C-N reductive elimination. The resulting tetra- and pentaarylpyridines serve as precursors to hitherto unprecedented nitrogen-containing polycyclic aromatic hydrocarbons via mechanochemically assisted multifold reductive cyclodehydrogenation.
Collapse
Affiliation(s)
- Chang-Sheng Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Qiao Sun
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Felipe García
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Chen Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process, Shaoxing University, Shaoxing, 312000, P. R. China
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| |
Collapse
|
19
|
Wang C, Sun Q, García F, Wang C, Yoshikai N. Robust Cobalt Catalyst for Nitrile/Alkyne [2+2+2] Cycloaddition: Synthesis of Polyarylpyridines and Their Mechanochemical Cyclodehydrogenation to Nitrogen‐Containing Polyaromatics**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chang‐Sheng Wang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Qiao Sun
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Felipe García
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Chen Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process Shaoxing University Shaoxing 312000 P. R. China
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| |
Collapse
|
20
|
Cai J, Bai LG, Zhang Y, Wang ZK, Yao F, Peng JH, Yan W, Wang Y, Zheng C, Liu WB. Ni-catalyzed enantioselective [2 + 2 + 2] cycloaddition of malononitriles with alkynes. Chem 2021. [DOI: 10.1016/j.chempr.2021.02.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
21
|
Du F, Li S, Jiang K, Zeng R, Pan X, Lan Y, Chen Y, Wei Y. Iron‐Catalyzed Radical Relay Enabling the Modular Synthesis of Fused Pyridines from Alkyne‐Tethered Oximes and Alkenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010752] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fei Du
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Shi‐Jun Li
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
| | - Kun Jiang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Rong Zeng
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Xi‐Chun Pan
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Yu Lan
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
- School of Chemistry and Chemical Engineering and Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 China
| | - Ying‐Chun Chen
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ye Wei
- College of Pharmacy Army Medical University Chongqing 400038 China
| |
Collapse
|
22
|
Du F, Li S, Jiang K, Zeng R, Pan X, Lan Y, Chen Y, Wei Y. Iron‐Catalyzed Radical Relay Enabling the Modular Synthesis of Fused Pyridines from Alkyne‐Tethered Oximes and Alkenes. Angew Chem Int Ed Engl 2020; 59:23755-23762. [DOI: 10.1002/anie.202010752] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Indexed: 12/26/2022]
Affiliation(s)
- Fei Du
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Shi‐Jun Li
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
| | - Kun Jiang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Rong Zeng
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Xi‐Chun Pan
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Yu Lan
- College of Chemistry and Institute of Green Catalysis Zhengzhou University Zhengzhou Henan 450001 China
- School of Chemistry and Chemical Engineering and Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University Chongqing 400030 China
| | - Ying‐Chun Chen
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ye Wei
- College of Pharmacy Army Medical University Chongqing 400038 China
| |
Collapse
|
23
|
Rakshit A, Kumar P, Alam T, Dhara H, Patel BK. Visible-Light-Accelerated Pd-Catalyzed Cascade Addition/Cyclization of Arylboronic Acids to γ- and β-Ketodinitriles for the Construction of 3-Cyanopyridines and 3-Cyanopyrrole Analogues. J Org Chem 2020; 85:12482-12504. [DOI: 10.1021/acs.joc.0c01703] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Prashant Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tipu Alam
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Hirendranath Dhara
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Bhisma K. Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| |
Collapse
|
24
|
Nagata T, Obora Y. Transition‐Metal‐Mediated/Catalyzed Synthesis of Pyridines, Pyrimidines, and Triazines by [2+2+2] Cycloaddition Reactions. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000240] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tatsuki Nagata
- Department of Chemistry and Materials Engineering Kansai University Suita Osaka 564-8680 Japan
| | - Yasushi Obora
- Department of Chemistry and Materials Engineering Kansai University Suita Osaka 564-8680 Japan
| |
Collapse
|
25
|
Roglans A, Pla-Quintana A, Solà M. Mechanistic Studies of Transition-Metal-Catalyzed [2 + 2 + 2] Cycloaddition Reactions. Chem Rev 2020; 121:1894-1979. [DOI: 10.1021/acs.chemrev.0c00062] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Anna Roglans
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Anna Pla-Quintana
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| |
Collapse
|
26
|
Bhatt D, Kalaramna P, Kumar K, Goswami A. Chemoselective Ru II
-Catalyzed Synthesis of Aryl Thiocyanates and Step-wise Double [2+2+2] Cycloadditions to 2-Aryl Thiopyridines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Divya Bhatt
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road 140001 Rupnagar Punjab India
| | - Pratibha Kalaramna
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road 140001 Rupnagar Punjab India
| | - Krishn Kumar
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road 140001 Rupnagar Punjab India
| | - Avijit Goswami
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road 140001 Rupnagar Punjab India
| |
Collapse
|
27
|
Sakata K, Shimada S, Takeuchi R. Regioselectivity in the Iridium-Catalyzed [2 + 2 + 2] Cycloaddition of Unsymmetrical α,ω-Diynes with Nitrile: A DFT Study. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00152] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ken Sakata
- Faculty of Pharmaceutical Sciences, Toho University, Miyama, Funabashi, Chiba 274-8510, Japan
| | - Satoshi Shimada
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara, Shinagawa-ku, Tokyo 142-8501, Japan
| | - Ryo Takeuchi
- Department of Chemistry and Biological Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| |
Collapse
|
28
|
Prakash M, Gudimella SK, Lodhi R, Guin S, Samanta S. NH 4OAc-Promoted Domino Route to Hydroxyarylated Unsymmetrical Pyridines under Neat Conditions. J Org Chem 2020; 85:2151-2167. [PMID: 31875454 DOI: 10.1021/acs.joc.9b02896] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new metal-, oxidant-, and solvent-free ecofriendly domino method has been established for modular synthesis of a diverse range of medicinally promising hydroxyarylated unsymmetrical pyridines in good to high chemical yields with an excellent regioselectivity. This domino process involves a range of N-sulfonyl ketimines as C,N-binucleophiles, enolizable ketones, and aromatic/heteroaromatic aldehydes using ammonium acetate as an ideal promoter under neat conditions, which creates two new C-C bonds and one C-N bond. Notably, the neutral reaction conditions are mild enough to tolerate a range of functionalities and cover a variety of substrates, thus bestowing a powerful avenue to access tri- and tetrasubstituted pyridines including carbo- and heterocyclic fused ones. Interestingly, a practical, scalable, and high-yielding synthesis of pyridylphenol derivatives was successfully accomplished by our unique method.
Collapse
Affiliation(s)
- Meher Prakash
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Santosh K Gudimella
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Rajni Lodhi
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Soumitra Guin
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Sampak Samanta
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| |
Collapse
|
29
|
Ten years of progress in the synthesis of six-membered N-heterocycles from alkynes and nitrogen sources. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130876] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
30
|
Xie Y, Wu C, Jia C, Tung CH, Wang W. Iron–cobalt-catalyzed heterotrimerization of alkynes and nitriles to polyfunctionalized pyridines. Org Chem Front 2020. [DOI: 10.1039/d0qo00693a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The iron(ii)–cobalt(ii) co-catalyzed heterotrimerization of alkynes and nitriles enables the synthesis of 2,3,4,5,6-pentafunctionalized pyridines in a single step.
Collapse
Affiliation(s)
- Yufang Xie
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Chengjuan Wu
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Changhao Jia
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Chen-Ho Tung
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Wenguang Wang
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| |
Collapse
|
31
|
Synthesis of Anthraquinones by Iridium-Catalyzed [2 + 2 + 2] Cycloaddition of a 1,2-Bis(propiolyl)benzene Derivative with Alkynes. INORGANICS 2019. [DOI: 10.3390/inorganics7110138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
[2 + 2 + 2] cycloaddition of a 1,2-bis(propiolyl)benzene derivative with terminal and internal alkynes takes place in the presence of [Ir(cod)Cl]2 (cod = 1,5-cyclooctadiene) combined with bis(diphenylphosphino)ethane (DPPE) to give anthraquinones in 42% to 93% yields with a simple experimental procedure. A fluorenone derivative can also be synthesized by iridium-catalyzed [2 + 2 + 2] cycloaddition of a benzene-linked ketodiyne with an internal alkyne to give a 94% yield.
Collapse
|
32
|
Bhatt D, Singh PR, Kalaramna P, Kumar K, Goswami A. An Atom‐Economical Approach to 2‐Triazolyl Thio‐/Seleno Pyridines
via
Ruthenium‐Catalyzed One‐pot [3+2]/[2+2+2] Cycloadditions. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900791] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Divya Bhatt
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab- 140001 India
| | - Prasoon Raj Singh
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab- 140001 India
| | - Pratibha Kalaramna
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab- 140001 India
| | - Krishn Kumar
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab- 140001 India
| | - Avijit Goswami
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab- 140001 India
| |
Collapse
|
33
|
Kalaramna P, Bhatt D, Sharma H, Goswami A. An Atom‐Economical Approach to 2‐Aryloxypyridines and 2,2′/2,3′‐Diaryloxybipyridines
via
Ruthenium‐Catalyzed [2+2+2] Cycloadditions. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900553] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Pratibha Kalaramna
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road Rupnagar Punjab-140001 India
| | - Divya Bhatt
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road Rupnagar Punjab-140001 India
| | - Himanshu Sharma
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road Rupnagar Punjab-140001 India
| | - Avijit Goswami
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road Rupnagar Punjab-140001 India
| |
Collapse
|
34
|
Kalaramna P, Bhatt D, Sharma H, Goswami A. An Expeditious and Environmentally-Benign Approach to 2-Aryl/Heteroaryl Selenopyridines via Ruthenium Catalyzed [2+2+2] Cycloadditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900664] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Pratibha Kalaramna
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road, Rupnagar, Punjab 140001 India
| | - Divya Bhatt
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road, Rupnagar, Punjab 140001 India
| | - Himanshu Sharma
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road, Rupnagar, Punjab 140001 India
| | - Avijit Goswami
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road, Rupnagar, Punjab 140001 India
| |
Collapse
|
35
|
Qin Q, Luo X, Wei J, Zhu Y, Wen X, Song S, Jiao N. Acetonitrile Activation: An Effective Two‐Carbon Unit for Cyclization. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900947] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qixue Qin
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Xiao Luo
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Jialiang Wei
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Yuchao Zhu
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Xiaojin Wen
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesEast China Normal University Shanghai 200062 China
| |
Collapse
|
36
|
Qin Q, Luo X, Wei J, Zhu Y, Wen X, Song S, Jiao N. Acetonitrile Activation: An Effective Two-Carbon Unit for Cyclization. Angew Chem Int Ed Engl 2019; 58:4376-4380. [PMID: 30715785 DOI: 10.1002/anie.201900947] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Indexed: 11/08/2022]
Abstract
A novel activation of acetonitrile for the construction of cyclobutenones by [2+2] cyclization was developed. Acetonitrile is utilized for the first time as two-carbon (C2) cyclization building block. The present protocol successfully inhibits the competitive cycloaddition with the C≡N bond of acetonitrile, but enables the in situ formation of an unsaturated carbon-carbon bond and the subsequent cycloaddition as a C2 unit. This chemistry features simple reaction conditions, high chemoselectivities, wide substrate scope, and offers a new and practical approach to cyclobutenones and cyclobuteneimines.
Collapse
Affiliation(s)
- Qixue Qin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Xiao Luo
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Jialiang Wei
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Yuchao Zhu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Xiaojin Wen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China.,Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, China
| |
Collapse
|
37
|
Takeuchi R, Sagawa J, Fujii M. Cationic Iridium Complex-Catalyzed Intermolecular Hydroalkylation of Unactivated Alkenes with 1,3-Diketones. Org Lett 2019; 21:741-744. [PMID: 30638390 DOI: 10.1021/acs.orglett.8b03975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Intermolecular hydroalkylation of unactivated terminal alkenes with 1,3-diketones under neutral conditions has been achieved using a cationic iridium catalyst. An active C-H bond of 2,4-pentadione (2a) added to 1-octene (1a) under refluxing DCE to give a Markovnikov product in 88% yield. A broad scope of alkenes and 1,3-diketones was observed. The products were easily converted to heterocycles. This reaction provides a new method for extending a carbon chain from an unactivated aliphatic terminal alkene.
Collapse
Affiliation(s)
- Ryo Takeuchi
- Department of Chemistry and Biological Science , Aoyama Gakuin University , 5-10-1 Fuchinobe , Chuo-ku, Sagamihara , Kanagawa 252-5258 , Japan
| | - Jun Sagawa
- Department of Chemistry and Biological Science , Aoyama Gakuin University , 5-10-1 Fuchinobe , Chuo-ku, Sagamihara , Kanagawa 252-5258 , Japan
| | - Masaki Fujii
- Department of Chemistry and Biological Science , Aoyama Gakuin University , 5-10-1 Fuchinobe , Chuo-ku, Sagamihara , Kanagawa 252-5258 , Japan
| |
Collapse
|
38
|
Uredi D, Motati DR, Watkins EB. A simple, tandem approach to the construction of pyridine derivatives under metal-free conditions: a one-step synthesis of the monoterpene natural product, (−)-actinidine. Chem Commun (Camb) 2019; 55:3270-3273. [DOI: 10.1039/c9cc01097a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
(−)-Actinidine, along with various diversely substituted pyridines were synthesized from simple starting materials, including natural products, using a mild and metal-free method.
Collapse
Affiliation(s)
- Dilipkumar Uredi
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
| | - Damoder Reddy Motati
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
| | - E. Blake Watkins
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
| |
Collapse
|
39
|
Xu M, Zheng Z, Wang M, Kong L, Ao Y, Li Y. Cobalt-catalyzed regioselective syntheses of indeno[2,1-c]pyridines from nitriles and diynes bearing propargyl fragments. Org Biomol Chem 2018; 16:8761-8768. [PMID: 30402643 DOI: 10.1039/c8ob02419g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient CoI2/o-phenanthroline catalyzed cycloaddition reaction of diynes bearing TBS protected propargylic alcohol fragments with nitriles has been developed. This methodology offers regioselective access, with good functional group tolerance, to various indeno[2,1-c]pyridine derivatives in moderate to excellent yields. It was found that o-phenanthroline as a bidentate nitrogen ligand showed high efficacy in this cycloaddition reaction.
Collapse
Affiliation(s)
- Murong Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, China.
| | | | | | | | | | | |
Collapse
|
40
|
Guin S, Gupta R, Majee D, Samanta S. DABCO- and DBU-promoted one-pot reaction of N-sulfonyl ketimines with Morita-Baylis-Hillman carbonates: a sequential approach to (2-hydroxyaryl)nicotinate derivatives. Beilstein J Org Chem 2018; 14:2771-2778. [PMID: 30498526 PMCID: PMC6244423 DOI: 10.3762/bjoc.14.254] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 10/16/2018] [Indexed: 12/25/2022] Open
Abstract
An intriguing DABCO-catalyzed and DBU-promoted one-pot synthesis of an important class of (2-hydroxyaryl)pyridine derivatives bearing a carboxylate or a nitrile group suitably placed at C3 position of the aza-ring has been achieved in acceptable chemical yields with a broad functional group tolerance. This sequential C-C/C-N bond making process proceeds through a regioselective allylic alkylation/aza-Michael reaction between MBH carbonates derived from an acrylate/acrylonitrile and N-sulfonyl ketimines as C,N-binucleophiles catalyzed by DABCO, followed by elimination of SO2 under the influence of base and subsequent aromatization in an open atmosphere.
Collapse
Affiliation(s)
- Soumitra Guin
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
| | - Raman Gupta
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
| | - Debashis Majee
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
| | - Sampak Samanta
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
| |
Collapse
|
41
|
Highly regioselective cobalt-catalyzed [2+2+2] cycloaddition of fluorine-containing internal alkynes to construct various fluoroalkylated benzene derivatives. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.06.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
42
|
Guin S, Majee D, Biswas S, Samanta S. Microwave-Assisted and Base-Promoted Domino Reaction of Cyclic N-Sulfonyl Ketimines with α,β-Disubstituted Nitroalkenes: A Green Access to 2-Hydroxyarylpyridines. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800298] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Soumitra Guin
- Discipline of Chemistry; Indian Institute of Technology Indore, Simrol; 453552 Indore India
| | - Debashis Majee
- Discipline of Chemistry; Indian Institute of Technology Indore, Simrol; 453552 Indore India
| | - Soumen Biswas
- Discipline of Chemistry; Indian Institute of Technology Indore, Simrol; 453552 Indore India
| | - Sampak Samanta
- Discipline of Chemistry; Indian Institute of Technology Indore, Simrol; 453552 Indore India
| |
Collapse
|
43
|
Morita-Baylis-Hillman enal-based triple cascade strategy for anti-selective synthesis of highly functionalized tetrahydropyridines using iminium-enamine catalysis. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
44
|
Moura NMM, Mariz IFA, Cavaleiro JAS, Silva AMS, Lodeiro C, Martinho JMG, Maçôas EMS, Neves MGPMS. Porphyrin-Oligopyridine Triads: Synthesis and Optical Properties. J Org Chem 2018; 83:5282-5287. [DOI: 10.1021/acs.joc.8b00208] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Nuno M. M. Moura
- QOPNA and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, 2829-516, Monte da Caparica, Portugal
| | - Inês F. A. Mariz
- CQFM and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - José A. S. Cavaleiro
- QOPNA and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Artur M. S. Silva
- QOPNA and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carlos Lodeiro
- BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, 2829-516, Monte da Caparica, Portugal
- ProteoMass Scientific Society, Madan Parque, Rua dos Inventores 2825-182, Monte da Caparica, Portugal
| | - José M. G. Martinho
- CQFM and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Ermelinda M. S. Maçôas
- CQFM and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | | |
Collapse
|
45
|
Bhatt D, Patel N, Chowdhury H, Bharatam PV, Goswami A. Additive-Controlled Switchable Selectivity from Cyanobenzenes to 2-Alkynylpyridines: Ruthenium(II)-Catalyzed [2+2+2] Cycloadditions of Diynes and Alkynylnitriles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800228] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Divya Bhatt
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road Rupnagar, Punjab- 140001 India
| | - Neha Patel
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Sector 67, S. A. S. Nagar 160062 Punjab India
| | - Hrishikesh Chowdhury
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road Rupnagar, Punjab- 140001 India
| | - Prasad V. Bharatam
- Department of Medicinal Chemistry; National Institute of Pharmaceutical Education and Research (NIPER); Sector 67, S. A. S. Nagar 160062 Punjab India
| | - Avijit Goswami
- Department of Chemistry; Indian Institute of Technology Ropar; Nangal Road Rupnagar, Punjab- 140001 India
| |
Collapse
|
46
|
Guo X, Yang X, Qin M, Liu Y, Yang Y, Chen B. Copper-Catalyzed Cyclization of Ketoxime Carboxylates and N
-Aryl Glycine Esters for the Synthesis of Pyridines. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700703] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Xin Guo
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 China), E-mai
| | - Xueying Yang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 China), E-mai
| | - Mingda Qin
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 China), E-mai
| | - Yafeng Liu
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 China), E-mai
| | - Yuting Yang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 China), E-mai
| | - Baohua Chen
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 730000 China), E-mai
- Zhongwei High-tech Institute of Lanzhou University; Zhongwei Ningxia 755500 China
| |
Collapse
|
47
|
Takeuchi R, Fujisawa S, Yoshida Y, Sagano J, Hashimoto T, Matsunami A. Synthesis of Multisubstituted Azatriphenylenes by Iridium-Catalyzed [2 + 2 + 2] Cycloaddition of Biaryl-Linked Diynes with Nitriles. J Org Chem 2018; 83:1852-1860. [DOI: 10.1021/acs.joc.7b02784] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ryo Takeuchi
- Department of Chemistry and Biological
Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Shunsuke Fujisawa
- Department of Chemistry and Biological
Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Yuzo Yoshida
- Department of Chemistry and Biological
Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Jun Sagano
- Department of Chemistry and Biological
Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Toru Hashimoto
- Department of Chemistry and Biological
Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| | - Asuka Matsunami
- Department of Chemistry and Biological
Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan
| |
Collapse
|
48
|
Dyachenko IV, Dyachenko VD. Cycloalka[c]pyridine derivatives. Methods of synthesis and chemical properties. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s1070428017120016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
49
|
Xu F, Si XJ, Wang XN, Kou HD, Chen DM, Liu CS, Du M. A high-activity cobalt-based MOF catalyst for [2 + 2 + 2] cycloaddition of diynes and alkynes: insights into alkyne affinity and selectivity control. RSC Adv 2018; 8:4895-4899. [PMID: 35539562 PMCID: PMC9077787 DOI: 10.1039/c7ra12136a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 01/15/2018] [Indexed: 11/22/2022] Open
Abstract
This work develops a highly efficient metal–organic framework (MOF) catalyst for the straightforward synthesis of functionalized benzenes via [2 + 2 + 2] cycloaddition. As efficient cooperative catalyst for such reactions, Co-MOF-1, shows great sustainability and efficiency. This new catalytic system can lead to the generation of a series of structurally diverse benzenes in good to excellent yields (up to 95%). Heterogenous catalysis of [2 + 2 + 2] cycloaddition was firstly achieved by a low-cost, air-stable and reusable Co-MOF catalyst, affording structurally diverse functionalized benzenes under mild conditions with high efficiency and selectivity.![]()
Collapse
Affiliation(s)
- Fen Xu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry Zhengzhou 450002 China
| | - Xiao-Ju Si
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry Zhengzhou 450002 China
| | - Xiao-Ning Wang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry Zhengzhou 450002 China
| | - Hao-Dong Kou
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry Zhengzhou 450002 China
| | - Di-Ming Chen
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry Zhengzhou 450002 China
| | - Chun-Sen Liu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry Zhengzhou 450002 China
| | - Miao Du
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry Zhengzhou 450002 China
| |
Collapse
|
50
|
Xia Y, Cai J, Huang H, Deng GJ. Synthesis of polysubstituted pyridines from oxime acetates using NH4I as a dual-function promoter. Org Biomol Chem 2018; 16:124-129. [DOI: 10.1039/c7ob02471a] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An NH4I dual-function promoter enables pyridine synthesis through oxime N–O bond reduction and subsequent condensation reactions.
Collapse
Affiliation(s)
- Yujia Xia
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Jinhui Cai
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education
- College of Chemistry
- Xiangtan University
- Xiangtan 411105
| |
Collapse
|