1
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Yan D, Wen S, Xing Y, Bu J, Shen K. Nickel-Catalyzed Reductive anti-Arylative Cyclization of Alkynyl Enones with Aryl Halides. J Org Chem 2024; 89:2223-2231. [PMID: 38326966 DOI: 10.1021/acs.joc.3c02120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
A nickel-catalyzed reductive anti-arylative cyclization of alkynyl enones with aryl halides has been developed. The reaction avoids the use of stoichiometric organometallic reagents and has a broad reaction scope and high functional group tolerance. This method offers an efficient way to access a variety of synthetically useful carbocycles that are widely found in many natural products and biologically active molecules.
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Affiliation(s)
- Denghong Yan
- School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Shun Wen
- School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Yunxin Xing
- School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Jie Bu
- School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Kun Shen
- School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
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2
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Tsukamoto H, Ito K, Ueno T, Shiraishi M, Kondo Y, Doi T. Palladium(0)-Catalyzed Anti-Selective Addition-Cyclizations of Alkynyl Electrophiles. Chemistry 2023; 29:e202203068. [PMID: 36333971 PMCID: PMC10108115 DOI: 10.1002/chem.202203068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/31/2022] [Accepted: 10/31/2022] [Indexed: 11/08/2022]
Abstract
Palladium(0)/monophosphine complexes catalyze anti-selective alkylative, arylative, and alkynylative cyclizations of alkynyl electrophiles with organometallic reagents. The remarkable anti-selectivity results from novel oxidative addition, that is, the nucleophilic attack of electron-rich palladium(0) on the electrophile across the alkyne followed by transmetalation and reductive elimination ("anti-Wacker"-type cyclization). With regard to 5-alkynals, triphenylphosphine (PPh3 )-ligated palladium(0) catalyzes the cyclization of terminal alkynes and conjugated alkenyl- or alkynyl-substituted ones to afford 2-cyclohexen-1-ol and 2-alkylidene-cyclopentanol derivatives, respectively. For 6-alkyl- or 6-aryl-5-alkynals, the cyclization does not proceed with the palladium/PPh3 catalyst; however, it does proceed with palladium/tricyclohexylphosphine (PCy3 ), to yield the former products predominantly. Remarkably, the latter catalyst completely switches the regioselectivity in the cyclization of the conjugated diyne-aldehydes. Notably, palladium/PPh3 -catalyzed cyclizations also proceed with other organometallics or even without them.
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Affiliation(s)
- Hirokazu Tsukamoto
- Department of Pharmaceutical Sciences, Yokohama University of Pharmacy 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan.,Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Kazuya Ito
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Tatsuhiko Ueno
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Mitsugu Shiraishi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Yoshinori Kondo
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Takayuki Doi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aza-aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
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3
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Maurya RK, Bhukta S, Kishor K, Chatterjee R, Burra AG, Khatravath M, Dandela R. Recent progress towards transition-metal-catalyzed arylative cyclization/annulation reactions with boronic acids. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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4
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Nayl AA, Aly AA, Arafa WAA, Ahmed IM, Abd-Elhamid AI, El-Fakharany EM, Abdelgawad MA, Tawfeek HN, Bräse S. Azides in the Synthesis of Various Heterocycles. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123716. [PMID: 35744839 PMCID: PMC9228195 DOI: 10.3390/molecules27123716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/04/2022] [Accepted: 06/05/2022] [Indexed: 11/23/2022]
Abstract
In this review, we focus on some interesting and recent examples of various applications of organic azides such as their intermolecular or intramolecular, under thermal, catalyzed, or noncatalyzed reaction conditions. The aforementioned reactions in the aim to prepare basic five-, six-, organometallic heterocyclic-membered systems and/or their fused analogs. This review article also provides a report on the developed methods describing the synthesis of various heterocycles from organic azides, especially those reported in recent papers (till 2020). At the outset, this review groups the synthetic methods of organic azides into different categories. Secondly, the review deals with the functionality of the azido group in chemical reactions. This is followed by a major section on the following: (1) the synthetic tools of various heterocycles from the corresponding organic azides by one-pot domino reaction; (2) the utility of the chosen catalysts in the chemoselectivity favoring C−H and C-N bonds; (3) one-pot procedures (i.e., Ugi four-component reaction); (4) nucleophilic addition, such as Aza-Michael addition; (5) cycloaddition reactions, such as [3+2] cycloaddition; (6) mixed addition/cyclization/oxygen; and (7) insertion reaction of C-H amination. The review also includes the synthetic procedures of fused heterocycles, such as quinazoline derivatives and organometal heterocycles (i.e., phosphorus-, boron- and aluminum-containing heterocycles). Due to many references that have dealt with the reactions of azides in heterocyclic synthesis (currently more than 32,000), we selected according to generality and timeliness. This is considered a recent review that focuses on selected interesting examples of various heterocycles from the mechanistic aspects of organic azides.
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Affiliation(s)
- AbdElAziz A. Nayl
- Department of Chemistry, College of Science, Jouf University, Sakaka 72341, Al Jouf, Saudi Arabia or (A.A.N.); (W.A.A.A.); (I.M.A.)
| | - Ashraf A. Aly
- Chemistry Department, Faculty of Science, Organic Division, Minia University, El-Minia 61519, Egypt;
- Correspondence: or (A.A.A.); (S.B.)
| | - Wael A. A. Arafa
- Department of Chemistry, College of Science, Jouf University, Sakaka 72341, Al Jouf, Saudi Arabia or (A.A.N.); (W.A.A.A.); (I.M.A.)
| | - Ismail M. Ahmed
- Department of Chemistry, College of Science, Jouf University, Sakaka 72341, Al Jouf, Saudi Arabia or (A.A.N.); (W.A.A.A.); (I.M.A.)
| | - Ahmed I. Abd-Elhamid
- Composites and Nanostructured Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt;
| | - Esmail M. El-Fakharany
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute GEBRI, City of Scientific Research and Technological Applications (SRTA City), New Borg Al-Arab, Alexandria 21934, Egypt;
| | - Mohamed A. Abdelgawad
- Department of Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Sakaka 72341, Al Jouf, Saudi Arabia;
| | - Hendawy N. Tawfeek
- Chemistry Department, Faculty of Science, Organic Division, Minia University, El-Minia 61519, Egypt;
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems (IBCS-FMS), Karlsruhe Institute of Technology, Ggenstein-Leopoldshafen, 76344 Karlsruhe, Germany
- Correspondence: or (A.A.A.); (S.B.)
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5
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Choi H, Lyu X, Kim D, Seo S, Chang S. Endo-Selective Intramolecular Alkyne Hydroamidation Enabled by NiH Catalysis Incorporating Alkenylnickel Isomerization. J Am Chem Soc 2022; 144:10064-10074. [PMID: 35621341 DOI: 10.1021/jacs.2c03777] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Intramolecular alkyne hydroamidation represents a straightforward approach for the access to synthetically valuable cyclic enamides. Despite some advances made in this realm, the ability to attain a precise regiocontrol still remains challenging, especially for endo cyclization that leads to six-membered and larger azacyclic rings. Herein, we report a NiH-catalyzed intramolecular hydroamidation of alkynyl dioxazolones that allows for an excellent endo selectivity, thus affording a range of six- to eight-membered endocyclic enamides with a broad scope. Mechanistic investigations revealed that Ni(I) catalysis is operative in the current system, proceeding via regioselective syn-hydronickelation, alkenylnickel E/Z isomerization, and Ni-centered inner-sphere nitrenoid transfer. In particular, the key alkenylnickel isomerization step, which previously lacked mechanistic understandings, was found to take place through the η2-vinyl transition state. The synthetic value of this protocol was demonstrated by diastereoselective modifications of the obtained endocyclic enamides to highly functionalized δ-lactam scaffolds.
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Affiliation(s)
- Hoonchul Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Xiang Lyu
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sangwon Seo
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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6
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Gillbard SM, Lam HW. Nickel-Catalyzed Arylative Cyclizations of Alkyne- and Allene-Tethered Electrophiles using Arylboron Reagents. Chemistry 2022; 28:e202104230. [PMID: 34986277 PMCID: PMC9302687 DOI: 10.1002/chem.202104230] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Indexed: 12/14/2022]
Abstract
The use of arylboron reagents in metal‐catalyzed domino addition–cyclization reactions is a well‐established strategy for the preparation of diverse, highly functionalized carbo‐ and heterocyclic products. Although rhodium‐ and palladium‐based catalysts have been commonly used for these reactions, more recent work has demonstrated nickel catalysis is also highly effective, in many cases offering unique reactivity and access to products that might otherwise not be readily available. This review gives an overview of nickel‐catalyzed arylative cyclizations of alkyne‐ and allene‐tethered electrophiles using arylboron reagents. The scope of the reactions is discussed in detail, and general mechanistic concepts underpinning the processes are described.
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Affiliation(s)
- Simone M Gillbard
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, NG7 2TU, Nottingham, UK.,School of Chemistry, University of Nottingham, University Park, NG7 2RD, Nottingham, UK
| | - Hon Wai Lam
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, NG7 2TU, Nottingham, UK.,School of Chemistry, University of Nottingham, University Park, NG7 2RD, Nottingham, UK
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7
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Suri Babu U, Singam MKR, Kumar MN, Nanubolu JB, Sridhar Reddy M. Palladium-Catalyzed Carbo-Aminative Cyclization of 1,6-Enynes: Access to Napthyridinone Derivatives. Org Lett 2022; 24:1598-1603. [PMID: 35191708 DOI: 10.1021/acs.orglett.2c00088] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
1,6-Enynes have recently stimulated enormous attention toward paving the way to unique cascade cyclizations offering complex cyclic motifs from linear substrates. We describe herein a general approach to napthyridinones via the Pd-catalyzed annulation of 1,6-enynes with 2-iodoanilines. This protocol represents a rare carbo-aminative annulative cyclization via the 6-endo-trig mode, subduing the well-documented exo-trig/dig cyclizations. The regioselective aryl palladation of alkyne followed by Heck-type intramolecular coupling before isomerization were key in realizing this cascade.
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Affiliation(s)
- Undamatla Suri Babu
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Maneesh Kumar Reddy Singam
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Muniganti Naveen Kumar
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | | | - Maddi Sridhar Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
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8
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Lin J, Liang G, Wu C, Tian X. Direct Synthesis of Napthalenes by Nickel‐Catalyzed Cascade Cyclization of
o
‐Vinyl Chlorobenzenes with Internal Alkynes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Jin Lin
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou 511436 China
| | - Guanfeng Liang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou 511436 China
| | - Chaoyi Wu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou 511436 China
| | - Xu Tian
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou 511436 China
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9
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Singam MKR, Suri Babu U, Nagireddy A, Nanubolu JB, Sridhar Reddy M. Harnessing Rhodium-Catalyzed C-H Activation: Regioselective Cascade Annulation for Fused Polyheterocycles. J Org Chem 2021; 86:8069-8077. [PMID: 34048238 DOI: 10.1021/acs.joc.1c00477] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In the realm of transition-metal catalyzed arene functionalization, rhodium(III) catalysis is considered as exemplary due to its propensity to activate C-H bonds to obtain comprehensive molecular assembly. Herein, we demonstrate a new rhodium(III) catalyzed assembly of polyheterocyclic scaffolds via C-H activation and regioselective annulation of 4-arylbut-3-yn-1-amines with 4-hydroxy-2-alkynoates. Heterocyclization and trans-metalation prior to annulation is the key for initiation of this relay redox-neutral catalytic cascade.
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Affiliation(s)
- Maneesh Kumar Reddy Singam
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Undamatla Suri Babu
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Attunuri Nagireddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | | | - Maddi Sridhar Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research, Ghaziabad 201002, India
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10
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Corpas J, Mauleón P, Arrayás RG, Carretero JC. Transition-Metal-Catalyzed Functionalization of Alkynes with Organoboron Reagents: New Trends, Mechanistic Insights, and Applications. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01421] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Javier Corpas
- Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
| | - Pablo Mauleón
- Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
| | - Ramón Gómez Arrayás
- Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
| | - Juan C. Carretero
- Department of Organic Chemistry, Faculty of Sciences, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
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11
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Gillbard SM, Green H, Argent SP, Lam HW. Enantioselective nickel-catalyzed anti-arylmetallative cyclizations onto acyclic electron-deficient alkenes. Chem Commun (Camb) 2021; 57:4436-4439. [PMID: 33949471 DOI: 10.1039/d1cc01166a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Enantioselective nickel-catalyzed reactions of (hetero)arylboronic acids or alkenylboronic acids with substrates containing an alkyne tethered to various acyclic electron-deficient alkenes are described.
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Affiliation(s)
- Simone M Gillbard
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, UK. and School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Harley Green
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, UK. and School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Stephen P Argent
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Hon Wai Lam
- The GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Jubilee Campus, Triumph Road, Nottingham, NG7 2TU, UK. and School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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12
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Shah C, Yadav P, Althagafi I, Nemaysh V, Shaw R, Elagamy A, Pratap R. Base mediated synthesis of functionalized 2-(alkynyl)arylnitriles and their molecular docking study with aromatase receptor. Org Biomol Chem 2021; 19:3462-3468. [PMID: 33899877 DOI: 10.1039/d1ob00165e] [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 simple, efficient, and transition metal-free approach to synthesize functionalized 2-(alkynyl)benzonitriles has been developed using suitably functionalized 2H-pyran-2-ones and 4-phenyl/trimethylsilanyl-but-3-yn-2-ones as precursors. The reaction proceeds in the presence of a base at room temperature to yield internal as well as terminal alkynes. The structure of the synthesized compound was confirmed by single-crystal X-ray analysis. The molecular docking study was performed to evaluate the binding mode of action of newly synthesized alkyne derivatives with known human breast cancer target receptor aromatase (PDB ID: 3EQM).
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Affiliation(s)
- Chandan Shah
- Department of Chemistry, University of Delhi, North Campus, Delhi, 110007, India.
| | - Pratik Yadav
- Department of Chemistry, Kirori Mal College, University of Delhi, North Campus, Delhi, 110007, India
| | - Ismail Althagafi
- Chemistry Department, Faculty of Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Vishal Nemaysh
- Department of Chemistry, University of Delhi, North Campus, Delhi, 110007, India.
| | - Ranjay Shaw
- Department of Chemistry, University of Delhi, North Campus, Delhi, 110007, India.
| | - Amr Elagamy
- Department of Chemistry, University of Delhi, North Campus, Delhi, 110007, India.
| | - Ramendra Pratap
- Department of Chemistry, University of Delhi, North Campus, Delhi, 110007, India.
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13
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Green H, Argent SP, Lam HW. Enantioselective Nickel-Catalyzed anti-Arylmetallative Cyclizations onto Acyclic Ketones. Chemistry 2021; 27:5897-5900. [PMID: 33533065 PMCID: PMC8048927 DOI: 10.1002/chem.202100143] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Indexed: 12/13/2022]
Abstract
Domino reactions involving nickel-catalyzed additions of (hetero)arylboronic acids to alkynes, followed by cyclization of the alkenylnickel intermediates onto tethered acyclic ketones to give chiral tertiary-alcohol-containing products in high enantioselectivities, are described. The reversible E/Z isomerization of the alkenylnickel intermediates enables overall anti-arylmetallative cyclization to occur. The ring system of the products are substructures of certain diarylindolizidine alkaloids.
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Affiliation(s)
- Harley Green
- The GlaxoSmithKline Carbon Neutral Laboratories for, Sustainable ChemistryUniversity of NottinghamJubilee Campus, Triumph RoadNottinghamNG7 2TUUK
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Stephen P. Argent
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Hon Wai Lam
- The GlaxoSmithKline Carbon Neutral Laboratories for, Sustainable ChemistryUniversity of NottinghamJubilee Campus, Triumph RoadNottinghamNG7 2TUUK
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
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14
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Parameshwar M, Singam MKR, Nagireddy A, Nanubolu JB, Reddy MS. Regioselective benzannulation of allylic sulfur ylides with ynones: a rapid access to substituted thioanisoles. Chem Commun (Camb) 2020; 56:13457-13460. [PMID: 33047759 DOI: 10.1039/d0cc05436d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The efficiency and selectivity of annulation reactions are often difficult to control in the presence of multiple potential reactive centers, like in the case of allylic sulfur ylides (ASY). Here, we describe a novel base mediated [3+3] benzannulation of ASY and readily available alkynones, which accomplishes the regioselective formation of multisubstituted thioanisoles, highly sought after chemical scaffolds. A new reactivity pattern of ASY has been unearthed, where it acted as both a 3C component and sulfur source in benzannulation. Use of a widely available base, operational simplicity and broad substrate scope are the additional salient features of the conversion.
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Affiliation(s)
- Matam Parameshwar
- Department of OSPC, CSIR-Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India.
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15
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Gurram RK, Rajesh M, Reddy Singam MK, Nanubolu JB, Reddy MS. A Sequential Activation of Alkyne and C–H Bonds for the Tandem Cyclization and Annulation of Alkynols and Maleimides through Cooperative Sc(III) and Cp*-Free Co(II) Catalysis. Org Lett 2020; 22:5326-5330. [DOI: 10.1021/acs.orglett.0c01533] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ravi Kumar Gurram
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, New Delhi 110001, India
| | - Manda Rajesh
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, New Delhi 110001, India
| | - Maneesh Kumar Reddy Singam
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, New Delhi 110001, India
| | | | - Maddi Sridhar Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research, New Delhi 110001, India
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16
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Nagireddy A, Singam MKR, Nanubolu JB, Sridhar Reddy M. Base-Mediated Cyclopentannulation of Ynones with Amino Crotonates for Regio- and Stereoselective Synthesis of Pentafulvenes and Cyclopenta[ c]quinolines. J Org Chem 2020; 85:6970-6980. [PMID: 32421329 DOI: 10.1021/acs.joc.0c00203] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A regio- and stereoselective synthesis of unsymmetrically substituted pentafulvenes is reported via the condensation of readily available ynones and amino crotonates under very mild conditions. The mechanism of this 3 + 2 annulation involved a vinylogous Michael addition followed by an intramolecular enamine aldol condensation. Substrates with o-bromo tether further cyclized to pentannulated hydroquinolines through an isomerization/SNAr in the same reaction pot at the elevated temperature.
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Affiliation(s)
- Attunuri Nagireddy
- Academy of Scientific and Innovative Research, New Delhi 110001, India.,Department of OSPC, CSIR-Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India
| | - Maneesh Kumar Reddy Singam
- Academy of Scientific and Innovative Research, New Delhi 110001, India.,Department of OSPC, CSIR-Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India
| | | | - Maddi Sridhar Reddy
- Academy of Scientific and Innovative Research, New Delhi 110001, India.,Department of OSPC, CSIR-Indian Institute of Chemical Technology, Habsiguda, Hyderabad 500007, India
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Di Sanza R, Nguyen TLN, Iqbal N, Argent SP, Lewis W, Lam HW. Enantioselective nickel-catalyzed arylative and alkenylative intramolecular 1,2-allylations of tethered allene-ketones. Chem Sci 2020; 11:2401-2406. [PMID: 34084403 PMCID: PMC8157472 DOI: 10.1039/c9sc05246a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 01/20/2020] [Indexed: 01/02/2023] Open
Abstract
The enantioselective nickel-catalyzed reaction of tethered allene-ketones with (hetero)arylboronic acids or potassium vinyltrifluoroborate is described. Carbonickelation of the allene gives allylnickel species, which undergo cyclization by 1,2-allylation to produce chiral tertiary-alcohol-containing aza- and carbocycles in high diastereo- and enantioselectivities.
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Affiliation(s)
- Riccardo Di Sanza
- The Glaxo Smith Kline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham Jubilee Campus, Triumph Road Nottingham NG7 2TU UK
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - Thi Le Nhon Nguyen
- The Glaxo Smith Kline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham Jubilee Campus, Triumph Road Nottingham NG7 2TU UK
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - Naeem Iqbal
- The Glaxo Smith Kline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham Jubilee Campus, Triumph Road Nottingham NG7 2TU UK
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - Stephen P Argent
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - William Lewis
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
| | - Hon Wai Lam
- The Glaxo Smith Kline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham Jubilee Campus, Triumph Road Nottingham NG7 2TU UK
- School of Chemistry, University of Nottingham University Park Nottingham NG7 2RD UK
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