1
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Leśniewska A, Przybylski P. Seven-membered N-heterocycles as approved drugs and promising leads in medicinal chemistry as well as the metal-free domino access to their scaffolds. Eur J Med Chem 2024; 275:116556. [PMID: 38879971 DOI: 10.1016/j.ejmech.2024.116556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/29/2024] [Accepted: 05/30/2024] [Indexed: 06/18/2024]
Abstract
Azepanes or azepines are structural motifs of many drugs, drug candidates and evaluated lead compounds. Even though compounds having N-heterocyclic 7-membered rings are often found in nature (e.g. alkaloids), the natural compounds of this group are rather rare as approved therapeutics. Thus, recently studied and approved azepane or azepine-congeners predominantly consist of semi-synthetically or synthetically-obtained scaffolds. In this review a comparison of approved drugs and recently investigated leads was proposed taking into regard their structural aspects (stereochemistry), biological activities, pharmacokinetic properties and confirmed molecular targets. The 7-membered N-heterocycles reveal a wide range of biological activities, not only against CNS diseases, but also as e.g. antibacterial, anticancer, antiviral, antiparasitic and against allergy agents. As most of the approved or investigated potential drugs or lead structures, belonging to 7-membered N-heterocycles, are synthetic scaffolds, this report also reveals different and efficient metal-free cascade approaches useful to synthesize both simple azepane or azepine-containing congeners and those of oligocyclic structures. Stereochemistry of azepane/azepine fused systems, in view of biological data and binding with the targets, is discussed. Apart from the approved drugs, we compare advances in SAR studies of 7-membered N-heterocycles (mainly from 2018 to 2023), whereas the related synthetic part concerning various domino strategies is focused on the last ten years.
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Affiliation(s)
- Aleksandra Leśniewska
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznan, Poland
| | - Piotr Przybylski
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznan, Poland.
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2
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Hou L, Yang L, Yang G, Luo Z, Xiao W, Yang L, Wang F, Gong LZ, Liu X, Cao W, Feng X. Catalytic Asymmetric Dearomative [2 + 2] Photocycloaddition/Ring-Expansion Sequence of Indoles with Diversified Alkenes. J Am Chem Soc 2024; 146:23457-23466. [PMID: 38993029 DOI: 10.1021/jacs.4c06780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
Developing novel strategies for catalytic asymmetric dearomatization (CADA) reactions is highly valuable. Visible light-mediated photocatalysis is demonstrated to be a powerful tool to activate aromatic compounds for further synthetic transformations. Herein, a catalytic asymmetric dearomative [2 + 2] photocycloaddition/ring-expansion sequence of indoles with simple alkenes was reported, providing a facile access to enantioenriched cyclopenta[b]indoles with good to high yields and enantioselectivities by means of chiral lanthanide photocatalysis. This protocol exhibited a broad substrate scope and good functional group tolerance, as well as potential applications in the synthesis of bioactive molecules. Mechanistic studies, including control experiments, UV-vis absorption spectroscopy, emission spectroscopy, and DFT calculations, were carried out, shedding insights into the reaction mechanism and the origin of enantioselectivity.
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Affiliation(s)
- Liuzhen Hou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Longqing Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Gaofei Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Zhe Luo
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Wanlong Xiao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Linhan Yang
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610061, China
| | - Fei Wang
- Center for Natural Products Research, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610061, China
| | - Liu-Zhu Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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3
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Reddy CR, Prasad AS, Ajaykumar U. A Domino Dearomative ipso-Annulation/Desymmetrization Approach: Stereoselective Access to Tricyclic Alkaloid Skeletons. Org Lett 2024; 26:4904-4909. [PMID: 38836597 DOI: 10.1021/acs.orglett.4c01407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Herein, we reveal an unprecedented domino annulation of N-benzyl-acrylamides with 1,3-dicarbonyls for the assembly of fused tricyclic alkaloid frameworks incorporating a spirocycle via an alkylation/dearomative ipso-annulation/Michael addition (desymmetrization) sequence. This conversion involves three carbon-carbon bond formations, generating four chiral carbons, including three quaternary carbon centers, in a single diastereomer in one pot under identical reaction conditions. The synthetic potential of this atom-economic method is illustrated by modifications of the functional groups present in the products obtained.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Aratikumari Suresh Prasad
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Uprety Ajaykumar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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4
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Wang ZH, Fu XH, Li Q, You Y, Yang L, Zhao JQ, Zhang YP, Yuan WC. Recent Advances in the Domino Annulation Reaction of Quinone Imines. Molecules 2024; 29:2481. [PMID: 38893357 PMCID: PMC11173866 DOI: 10.3390/molecules29112481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 06/21/2024] Open
Abstract
Quinone imines are important derivatives of quinones with a wide range of applications in organic synthesis and the pharmaceutical industry. The attack of nucleophilic reagents on quinone imines tends to lead to aromatization of the quinone skeleton, resulting in both the high reactivity and the unique reactivity of quinone imines. The extreme value of quinone imines in the construction of nitrogen- or oxygen-containing heterocycles has attracted widespread attention, and remarkable advances have been reported recently. This review provides an overview of the application of quinone imines in the synthesis of cyclic compounds via the domino annulation reaction.
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Affiliation(s)
- Zhen-Hua Wang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Xiao-Hui Fu
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Qun Li
- School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 611730, China;
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Yong You
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Lei Yang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Jian-Qiang Zhao
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Yan-Ping Zhang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
| | - Wei-Cheng Yuan
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China; (X.-H.F.); (Y.Y.); (L.Y.); (J.-Q.Z.); (Y.-P.Z.)
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5
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Liang D, Zhou QQ, Xuan J. Multiple-cycle photochemical cascade reactions. Org Biomol Chem 2024; 22:2156-2174. [PMID: 38385507 DOI: 10.1039/d4ob00071d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Cascade reactions represent an efficient and economical synthetic approach, enabling the rapid synthesis of a wide array of structurally complex organic compounds. These compounds, previously inaccessible, can now be synthesized in a remarkably limited number of steps. Concurrently, the photochemical reactions of organic molecules have gained prominence as a potent strategy for accessing a diverse range of radical species and intermediates. This is achieved in a controlled manner under mild conditions. Owing to the relentless endeavors of chemists, significant strides have been made in the realm of photochemical cascade reactions. These advancements have facilitated the synthesis of novel molecular structures with high complexity, structures that are typically challenging to generate under thermal conditions. In this review, we comprehensively summarize and underscore the recent pivotal advancements in visible-light-induced cascade reactions. Our focus is on the elucidation of multiple photochemical catalytic cycles, emphasizing the catalytic activation modes and the types of reactions involved.
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Affiliation(s)
- Dong Liang
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
| | - Quan-Quan Zhou
- Institute of Advanced Materials, Jiangxi Normal University, Nanchang 330022, China.
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China.
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6
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Ayesha, Ashraf A, Arshad M, Sajid N, Rasool N, Abbas M, Nazeer U, Khalid M, Imran M. Dinuclear Zn-Catalytic System as Brønsted Base and Lewis Acid for Enantioselectivity in Same Chiral Environment. ACS OMEGA 2024; 9:6074-6092. [PMID: 38375498 PMCID: PMC10876046 DOI: 10.1021/acsomega.3c07446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 02/21/2024]
Abstract
Zinc (Zn) is a crucial element with remarkable significance in organic transformations. The profusion of harmless zinc salts in the Earth's outer layer qualifies zinc as a noteworthy contender for inexpensive and eco-friendly reagents and catalysts. Recently, widely recognized uses of organo-Zn compounds in the field of organic synthesis have undergone extensive expansion toward asymmetric transformations. The ProPhenol ligand, a member of the chiral nitrogenous-crown family, exhibits the spontaneous formation of a dual-metal complex when reacted with alkyl metal (R-M) reagents, e.g., ZnEt2. The afforded Zn complex possesses two active sites, one Lewis acid and the other Brønsted base, thereby facilitating the activation of nucleophiles and electrophiles simultaneously within the same chiral pocket. In this comprehensive analysis, we provide a thorough account of the advancement and synthetic potential of these diverse catalysts in organic synthesis, while emphasizing the reactivity and selectivities, i.e., dr and ee due to the design/structure of the ligands employed.
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Affiliation(s)
- Ayesha
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Aisha Ashraf
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mahwish Arshad
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Numan Sajid
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Nasir Rasool
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mujahad Abbas
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Usman Nazeer
- Chemistry
Department, University of Houston, 3585 Cullen Boulvard, Houston, Texas 77204-5003, United States
| | | | - Muhammad Imran
- Chemistry
Department, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
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7
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Arora R, Bajohr J, Lautens M. Rapid Assembly of Unsymmetrically Linked Bis-heterocycles via Palladium Domino Catalysis. Org Lett 2023; 25:9053-9057. [PMID: 38085822 DOI: 10.1021/acs.orglett.3c03825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
A palladium-catalyzed domino reaction of alkene-tethered oxime esters is reported. This transformation uses an air-stable palladium precatalyst that initiates a Narasaka-Heck reaction, that is interrupted with a Pd(II)-promoted cyclization. Through this methodology, a novel class of unsymmetrical alkyl-linked bis-heterocycles were synthesized in yields up to 99%. The reaction is scalable up to 1.0 mmol, with simplified purification steps. This transformation expands the scope of accessible bis-heterocycles available through Narasaka-Heck reactions beyond C-H activation and direct anionic capture termination steps.
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Affiliation(s)
- Ramon Arora
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Jonathan Bajohr
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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8
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Wang Y, Feng J, Li EQ, Jia Z, Loh TP. Recent advances in ligand-enabled palladium-catalyzed divergent synthesis. Org Biomol Chem 2023; 22:37-54. [PMID: 38050418 DOI: 10.1039/d3ob01679j] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Developing efficient and straightforward strategies to rapidly construct structurally distinct and diverse organic molecules is one of the most fundamental tasks in organic synthesis, drug discovery and materials science. In recent years, divergent synthesis of organic functional molecules from the same starting materials has attracted significant attention and has been recognized as an efficient and powerful strategy. To achieve this objective, the proper adjustment of reaction conditions, such as catalysts, solvents, ligands, etc., is required. In this review, we summarized the recent efforts in chemo-, regio- and stereodivergent reactions involving acyclic and cyclic systems catalyzed by palladium complexes. Meanwhile, the reaction types, including carbonylative reactions, coupling reactions and cycloaddition reactions, as well as the probable mechanism have also been highlighted in detail.
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Affiliation(s)
- Yue Wang
- College of Advanced Interdisciplinary Science and Technology (CAIST), Henan University of Technology, Zhengzhou450001, China.
| | - Jinzan Feng
- College of Advanced Interdisciplinary Science and Technology (CAIST), Henan University of Technology, Zhengzhou450001, China.
| | - Er-Qing Li
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, P. R. China.
| | - Zhenhua Jia
- College of Advanced Interdisciplinary Science and Technology (CAIST), Henan University of Technology, Zhengzhou450001, China.
| | - Teck-Peng Loh
- College of Advanced Interdisciplinary Science and Technology (CAIST), Henan University of Technology, Zhengzhou450001, China.
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9
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Chen J, Yang X, Huang Y, Zheng Z, Li T. The Development of Aldehyde Catalytic System. Chem Asian J 2023; 18:e202300731. [PMID: 37755436 DOI: 10.1002/asia.202300731] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 09/28/2023]
Abstract
Aldehyde catalysts have proven to be highly effective in facilitating and accelerating a wide range of challenging transformations in organic chemistry. This article is structured into three main sections, focusing on the utilization of aldehydes as organocatalysts, the aldehydes/transition metals catalytic systems, and photochemical initiators. Finally, we provide a concise summary of the advancements in this fascinating research field, offering our perspectives and insights.
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Affiliation(s)
- Jinli Chen
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Xiaoqun Yang
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Yixian Huang
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Zhiguo Zheng
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
| | - Tingting Li
- National Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University. Huaxi District, Guiyang, 550025, China
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10
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Rajput D, Jan G, Karuppasamy M, Bhuvanesh N, Nagarajan S, Maheswari CU, Menéndez JC, Sridharan V. Rapid Assembly of Functionalized 2 H-Chromenes and 1,2-Dihydroquinolines via Microwave-Assisted Secondary Amine-Catalyzed Cascade Annulation of 2- O/ N-Propargylarylaldehydes with 2,6-Dialkylphenols. J Org Chem 2023; 88:11778-11792. [PMID: 37556760 DOI: 10.1021/acs.joc.3c01082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
An efficient, secondary amine-catalyzed cascade annulation of 2-O/N-propargylarylaldehydes with 2,6-dialkylphenols was established to access biologically relevant functionalized 2H-chromenes and 1,2-dihydroquinolines tethered with a synthetically useful p-quinone methide scaffold in high yields under microwave irradiation and conventional heating conditions. The microwave-assisted strategy was convenient, clean, rapid, and high yielding in which the reactions were completed in just 15 min, and the yields obtained were up to 95%. This highly atom-economical domino process constructed two new C-C double bonds and a six-membered O/N-heterocyclic ring in a single synthetic operation. Its mechanism process was rationalized as involving sequential iminium ion formation, nucleophilic addition, and intramolecular annulation steps. Furthermore, the synthesized 2H-chromene derivatives were transformed into valuable indeno[2,1-c]chromenes, 5H-indeno[2,1-c]quinolines, and oxireno[2,3-c]chromene via a palladium-catalyzed double C-H bond activation process and epoxidation, respectively.
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Affiliation(s)
- Diksha Rajput
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Gowsia Jan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Muthu Karuppasamy
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Subbiah Nagarajan
- Department of Chemistry, National Institute of Technology, Warangal, Warangal 506004, Telangana, India
| | - C Uma Maheswari
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - J Carlos Menéndez
- Unidad de Química Orgánica y Farmacéutica, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
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11
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Nakagawa H, Fuwa H. Au-catalyzed stereodivergent synthesis of 2,5-disubstituted pyrrolidines: total synthesis of (+)-monomorine I and (+)-indolizidine 195B. Chem Commun (Camb) 2023; 59:10121-10124. [PMID: 37483107 DOI: 10.1039/d3cc02453a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Stereodivergent synthesis of 2,5-disubstituted pyrrolidines was achieved via a Au-catalyzed tandem intramolecular alkyne hydroamination/iminium formation/Et3SiH reduction. Importantly, the stereochemical outcome could be switched by choosing an appropriate nitrogen protecting group. Total synthesis of a diastereomeric pair of alkaloid natural products, monomorine I and indolizidine 195B, was achieved to showcase the synthetic utility of the tandem reaction.
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Affiliation(s)
- Hayato Nakagawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
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12
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Ferraz-Caetano J, Teixeira F, Cordeiro MNDS. Systematic Development of Vanadium Catalysts for Sustainable Epoxidation of Small Alkenes and Allylic Alcohols. Int J Mol Sci 2023; 24:12299. [PMID: 37569673 PMCID: PMC10418365 DOI: 10.3390/ijms241512299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 07/27/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
The catalytic epoxidation of small alkenes and allylic alcohols includes a wide range of valuable chemical applications, with many works describing vanadium complexes as suitable catalysts towards sustainable process chemistry. But, given the complexity of these mechanisms, it is not always easy to sort out efficient examples for streamlining sustainable processes and tuning product optimization. In this review, we provide an update on major works of tunable vanadium-catalyzed epoxidations, with a focus on sustainable optimization routes. After presenting the current mechanistic view on vanadium catalysts for small alkenes and allylic alcohols' epoxidation, we argue the key challenges in green process development by highlighting the value of updated kinetic and mechanistic studies, along with essential computational studies.
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Affiliation(s)
- José Ferraz-Caetano
- LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, S/N, 4169-007 Porto, Portugal;
| | - Filipe Teixeira
- CQUM, Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal;
| | - Maria Natália Dias Soeiro Cordeiro
- LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, S/N, 4169-007 Porto, Portugal;
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13
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Sakai T, Furuhata T, Hosoe K, Umemura K, Mori Y. Synthesis of Fused Tricyclic Amines Bearing Tetrasubstituted Carbons Using an Alkylation-Cyclization-Isomerization-3-aza-Cope Cascade Reaction. Org Lett 2023; 25:2986-2990. [PMID: 37093615 DOI: 10.1021/acs.orglett.3c00778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
A new cascade reaction sequence that involves alkylation, cyclization, isomerization, and 3-aza-Cope rearrangement was discovered. The stereogenic centers of the starting piperidines were transferred to the bicyclic enamine products, and a range of electron-withdrawing groups on the alkyne moieties, from ketones to amides, were tolerated under the reaction conditions. The bicyclic enamines underwent trifluoroacetic acid (TFA)-mediated cyclization to form tricyclic amines bearing tetrasubstituted carbons.
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Affiliation(s)
- Takeo Sakai
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Tomoki Furuhata
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Kota Hosoe
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Kaho Umemura
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| | - Yuji Mori
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
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14
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Pali P, Singh MS. Radical-Cascade Avenue to Access 1,2-Dithioles Employing Dithioesters and Edman's Reagent. Org Lett 2023; 25:2258-2263. [PMID: 36966396 DOI: 10.1021/acs.orglett.3c00509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2023]
Abstract
An operationally simple and efficient domino etiquette has been developed for the facile construction of 1,2-dithioles employing easily accessible dithioesters as a three-atom CCS synthon and aryl isothiocyanates as a two-atom CS unit in the absence of any catalyst and additive at room temperature under open air. The reaction proceeded efficiently affording the desired 1,2-dithioles in good yields having various functional groups of a diverse electronic and steric nature. This approach avoids possible toxicity and tiresome workup conditions and features easy to handle, cheap, and readily accessible reagents, O2 as a green oxidant, and gram-scale ability. Notably, the final S-S bond formation and cascade ring construction follow a radical pathway, which has been recognized via a radical trapping experiment with BHT during the course of the reaction. Notably, the exocyclic C═N bond at position 3 of 1,2-dithiole possesses Z stereochemistry.
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Affiliation(s)
- Pragya Pali
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Maya Shankar Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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15
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Liu L, Wen C, Sun G, Li Y, Zhang J, Zhang Z, Wang Z, She M, Liu P, Zhang S, Li J. Multisite-Sequential Cyclization To Construct 1,2,4-Triazole-Based N-Fused Heterocyclics. Org Lett 2023; 25:1530-1535. [PMID: 36852941 DOI: 10.1021/acs.orglett.3c00322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
A feasible protocol that uses atomic groups (KSCN, KSeCN, and NH2CN), o-bromobenzoyl hydrazides, and formyls as reaction factors to synthesize N-fused 1,2,4-triazole with benzothiazides, benzoselenazinones, and quinazolinones was proposed. The method overcomes the lengthy multistep synthesis, narrow substrate scope, and toxicity challenge induced by the use or production of hazardous substances. It also enables the development of fused-heterocyclic selenium and quinazolinone derivatives. Their fluorescent performance further demonstrates the practicability of this methodology.
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Affiliation(s)
- Lang Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Changting Wen
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Guojin Sun
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Yao Li
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jun Zhang
- College of Chemistry and Chemical Engineering, Ningxia University Yinchuan, Ningxia, 750021, P. R. China
| | - Zhe Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Zesi Wang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Mengyao She
- Ministry of Education Key Laboratory of Resource Biology and Modern Biotechnology in Western China, The College of Life Sciences, Faculty of Life and Health Science, Northwest University, Xi'an, Shaanxi Province 710069, P. R. China
| | - Ping Liu
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Shengyong Zhang
- College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Jianli Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710127, P. R. China
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16
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Hommelsheim R, Bausch S, Selvakumar A, Amer MM, Truong KN, Rissanen K, Bolm C. A Copper-Catalyzed Interrupted Domino Reaction for the Synthesis of Fused Triazolyl Benzothiadiazine-1-oxides. Chemistry 2023; 29:e202203729. [PMID: 36453242 DOI: 10.1002/chem.202203729] [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: 11/29/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 12/03/2022]
Abstract
Copper(I)-catalyzed domino reactions of 2-azido sulfoximines with 1-iodoalkynes yield fused triazolyl-containing benzothiadiazine-1-oxides. The protocol features the synthesis of two fused heterocyclic rings in one step with good to excellent yields and a broad functional group tolerance. Detailed mechanistic investigations indicate that a copper π-complex initiates a cycloaddition and oxidative C-N coupling reaction sequence. The results suggest an interrupted domino process involving an iodinated triazole as a key intermediate.
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Affiliation(s)
- Renè Hommelsheim
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Sandra Bausch
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Arjuna Selvakumar
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Mostafa M Amer
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.,Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt
| | - Khai-Nghi Truong
- University of Jyvaskyla, Department of Chemistry, P.O. Box. 35, Survontie 9 B, 40014, Jyväskylä, Finland
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, P.O. Box. 35, Survontie 9 B, 40014, Jyväskylä, Finland
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
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17
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Gao X, Menche D. Sequential Methods for Di- and Tetrahydro-Pyranone Synthesis Enable Concise Access to Tuscolid δ-Lactone. Chem Asian J 2023; 18:e202201193. [PMID: 36541601 PMCID: PMC10108315 DOI: 10.1002/asia.202201193] [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: 11/28/2022] [Revised: 12/21/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
Two novel tandem sequences for stereoselective synthesis of elaborate hydropyranones are reported. The first one relies on an aldol-lactonization procedure of a chiral enolate with an unprotected aldehyde, while the second one is based on a challenging dienolate ketone addition with concomitant cyclization and substrate controlled reduction. Both approaches proceed with high efficiency and stereoselectivity and enable very short accesses to the authentic pyranone subunit of the complex polyketide tuscolid and will be important to develop a first total synthesis of this structurally unique macrolide and to evaluate the tuscolid-tuscoron rearrangement.
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Affiliation(s)
- Xin Gao
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
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18
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Microwave‐Assisted Multicomponent Synthesis of New 6‐Arylated 5‐Hydroxy‐benzo[
a
]phenazine Derivatives and Their Potential Anti‐inflammatory Activity. ChemistrySelect 2023. [DOI: 10.1002/slct.202204376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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19
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Miletto I, Meazza M, Paul G, Cossi M, Gianotti E, Marchese L, Rios R, Pera-Titus M, Raja R. Influence of Pore Size in Benzoin Condensation of Furfural Using Heterogenized Benzimidazole Organocatalysts. Chemistry 2022; 28:e202202771. [PMID: 36302695 PMCID: PMC10108080 DOI: 10.1002/chem.202202771] [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: 09/05/2022] [Revised: 10/24/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
Abstract
A designed N-heterocyclic carbene (NHC) catalyst was covalently anchored on a range of mesoporous and hierarchical supports, to study the influence of pore size in the benzoin condensation of furfural. The structural and spectroscopic characteristics of the anchored catalysts were investigated, also with the help of molecular dynamics simulations, in order to rationalize the degree of stability and recyclability of the heterogenized organocatalysts. Quantitative yields (99 %) and complete recyclability were maintained after several cycles, vindicating the design rationale.
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Affiliation(s)
- Ivana Miletto
- Department of Pharmaceutical Sciences, Università del Piemonte Orientale, Largo Donegani 2/3, 28100, Novara, Italy
| | - Marta Meazza
- School of Chemistry, University of Southampton, Highfield campus, Southampton, SO171BJ, UK
| | - Geo Paul
- Department of Science and Technological Innovation, Università del Piemonte Orientale, V. T. Michel 11, 15100, Alessandria, Italy
| | - Maurizio Cossi
- Department of Science and Technological Innovation, Università del Piemonte Orientale, V. T. Michel 11, 15100, Alessandria, Italy
| | - Enrica Gianotti
- Department for the Sustainable Development and Ecological Transition, Università del Piemonte Orientale, Piazza Sant'Eusebio 5, 13100, Vercelli, Italy
| | - Leonardo Marchese
- Department of Science and Technological Innovation, Università del Piemonte Orientale, V. T. Michel 11, 15100, Alessandria, Italy
| | - Ramon Rios
- School of Chemistry, University of Southampton, Highfield campus, Southampton, SO171BJ, UK.,Current address: Department of Chemistry, Khalifa University, SAN Campus, Abu Dhabi (UAE)
| | - Marc Pera-Titus
- Cardiff Catalysis Institute, School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff, CF10 3AT, UK
| | - Robert Raja
- School of Chemistry, University of Southampton, Highfield campus, Southampton, SO171BJ, UK
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20
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Patil SP, Shinde SK, Patil SS. Coconut endocarp shell ash (CESA): a non-conventional catalyst for green synthesis of 2-amino-4H-benzochromenes. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04847-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Marcum JS, Meek SJ. Efficient Enantio-, Diastereo, E/ Z-, and Site-Selective Nickel-Catalyzed Fragment Couplings of Aldehydes, Dienes, and Organoborons. J Am Chem Soc 2022; 144:19231-19237. [PMID: 36195082 DOI: 10.1021/jacs.2c08742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The enantioselective synthesis of bis-homoallylic alcohols through nickel-catalyzed three-component fragment couplings of simple aldehydes, dienes, and aryl organoborons is disclosed. The reactions proceed through diene dicarbofunctionalization that concurrently forms two C-C bonds and two stereogenic centers. The transformations are promoted by a 5.0 mol % loading of a readily accessible chiral phosphine-nickel complex and afford products with high stereoselectivity.
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Affiliation(s)
- Justin S Marcum
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Simon J Meek
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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22
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Sengupta S, Pabbaraja S, Mehta G. Domino Reactions through Recursive Anionic Cascades: The Advantageous Use of Nitronates. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Srihari Pabbaraja
- Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
| | - Goverdhan Mehta
- School of Chemistry University of Hyderabad Hyderabad 500046 India
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23
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Chen D, Jones EV, Williams CW, Huynh TN, McPhail TC, France S. Intramolecular, Interrupted Homo‐Nazarov Cascade Biscyclizations to Angular (Hetero)Aryl‐Fused Polycycles. Chemistry 2022; 28:e202201368. [DOI: 10.1002/chem.202201368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Doris Chen
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Elizabeth V. Jones
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Corey W. Williams
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Tan‐Khang N. Huynh
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Tristan C. McPhail
- School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Stefan France
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
- Petit Institute for Bioengineering and Bioscience Georgia Institute of Technology Atlanta Georgia 30332 USA
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24
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Tseliou V, Faraone A, Kqiku L, Vilím J, Simionato G, Melchiorre P. Enantioselective Biocascade Catalysis with a Single Multifunctional Enzyme. Angew Chem Int Ed Engl 2022; 61:e202212176. [DOI: 10.1002/anie.202212176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Indexed: 12/12/2022]
Affiliation(s)
- Vasilis Tseliou
- ICIQ, Institute of Chemical Research of Catalonia The Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Adriana Faraone
- University Rovira i Virgili 43007 Tarragona Spain
- ICIQ, Institute of Chemical Research of Catalonia The Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Laura Kqiku
- University Rovira i Virgili 43007 Tarragona Spain
- ICIQ, Institute of Chemical Research of Catalonia The Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Jan Vilím
- ICIQ, Institute of Chemical Research of Catalonia The Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Gianluca Simionato
- ICIQ, Institute of Chemical Research of Catalonia The Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
| | - Paolo Melchiorre
- ICREA Passeig Lluís Companys 23 08010 Barcelona Spain
- ICIQ, Institute of Chemical Research of Catalonia The Barcelona Institute of Science and Technology Avenida Països Catalans 16 43007 Tarragona Spain
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25
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Tseliou V, Faraone A, Kqiku L, Vilím J, Simionato G, Melchiorre P. Enantioselective Biocascade Catalysis with a Single Multifunctional Enzyme. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202212176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vasilis Tseliou
- ICIQ: Institut Catala d'Investigacio Quimica Melchiorre group 43007 Tarragona SPAIN
| | - Adriana Faraone
- ICIQ: Institut Catala d'Investigacio Quimica Melchiorre group SPAIN
| | - Laura Kqiku
- ICIQ: Institut Catala d'Investigacio Quimica Melchiorre group SPAIN
| | - Jan Vilím
- ICIQ: Institut Catala d'Investigacio Quimica Melchiorre group SPAIN
| | | | - Paolo Melchiorre
- Institute of Chemical Research of Catalonia (ICIQ) ICIQ Av. Països Catalans 16 43007 Tarragona SPAIN
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26
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You ZH, Liu YK. Asymmetric Organocatalytic Access to Spiro-fused Heterocyclic Compounds: E1cB Elimination Mediates Formal [4 + 2] Annulation. Org Lett 2022; 24:6288-6291. [PMID: 35980337 DOI: 10.1021/acs.orglett.2c02435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Based on the intramolecular E1cB elimination, a novel [4 + 2] cyclization was designed and successfully applied to the asymmetric synthesis of polycyclic compounds which contained both chromane and spirooxindole moieties. In the reaction, regardless of the competitive pathways resulting from multireactive sites of starting materials, products could be obtained in good yields (up to 84%) and with excellent enantioselectivities (most 98 to >99% ee) under the catalysis of a chiral bifunctional thiourea-tertiary amine (1-5 mol %).
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Affiliation(s)
- Zhi-Hao You
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Hebei University, Baoding 071002, China.,Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Yan-Kai Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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27
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Kishore DR, Satyanarayana G. Intermolecular Sonogashira Coupling and Intramolecular 5- Exo- dig Cycloisomerization Cascade: A One-Pot Pathway for Accessing (3-Benzylbenzofuran-2-yl)(phenyl)methanones. J Org Chem 2022; 87:10158-10172. [PMID: 35834555 DOI: 10.1021/acs.joc.2c01101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we present an efficient and straightforward strategy enabling access to 2,3-disubstituted benzo[b]furans. The whole synthetic process proceeds via a domino intermolecular Sonogashira coupling of 2-(2-bromophenoxy)-1-phenylethan-1-ones/alkyl 2-(2-bromophenoxy)acetates/2-(2-bromophenoxy)acetonitrile/1-(2-bromophenoxy)propan-2-one with terminal acetylenes followed by an intramolecular carbanion-yne cyclization in a 5-exo-dig manner and subsequent double-bond isomerization. Notably, two C-C bonds have been constructed in a one-pot manner and a wide variety of (3-benzylbenzofuran-2-yl)(phenyl)methanones were accomplished with good functional group tolerance.
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Affiliation(s)
- Dakoju Ravi Kishore
- Department of Chemistry, Indian Institute of Technology (IIT) Hyderabad, Kandi, Sangareddy District, 502284 Hyderabad, Telangana, India
| | - Gedu Satyanarayana
- Department of Chemistry, Indian Institute of Technology (IIT) Hyderabad, Kandi, Sangareddy District, 502284 Hyderabad, Telangana, India
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28
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Balasubramani A, Gunnam A, Mehta G. In Situ-Generated Ammonia Mediates Deep Restructuring of o-Bis-Ynones through a Cascade Process: One-Pot Synthesis of 2-Azafluorenones. J Org Chem 2022; 87:10138-10145. [PMID: 35818118 DOI: 10.1021/acs.joc.2c01089] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One-pot synthesis of 2-azaflorenones from readily accessed o-bis-ynones through Michael addition, orthogonal aldol reaction, dehydrative isomerization, and a 6-endo-dig-cyclization cascade, triggered by in situ-generated ammonia in the presence of a Cu(I) catalyst, has been discovered and its generality scoped. A few selected reactions of a prototypical 2-azafluorenone have been explored for functionality augmentation in its core structure. Overall, this operationally convenient 2-azafluorenone synthesis involves the formation of five new bonds (3 C-N and 2 C-C) in one pot and embodies many green and sustainable features; notably, the reagent ammonia is subsumed into the reactant o-bis-ynones with atom economy, and the only by-product is water.
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Affiliation(s)
| | - Anilkumar Gunnam
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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29
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Wang T, Chen X, Li P. One‐pot Divergent Synthesis of Benzoxazines and Dihydroquinolines from Morita‐Baylis‐Hillman Alcohols. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tao Wang
- Southern University of Science and Technology Department of Chemistry Shenzhen CHINA
| | - Xuling Chen
- Southern University of Science and Technology Department of Chemistry Shenzhen CHINA
| | - Pengfei Li
- Southern University of Science and Technology Department of Chemistry 1088 Xueyuan Blvd., Nanshan district 518055 Shenzhen CHINA
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30
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Pellissier H. Recent developments in enantioselective titanium-catalyzed transformations. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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31
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Rajput D, Kumar A, Jandial T, Karuppasamy M, Bhuvanesh N, Kumar RS, Almansour AI, Sridharan V. Microwave-Assisted Copper(II)-Catalyzed Cascade Cyclization of 2-Propargylamino/Oxy-Arylaldehydes and O-Phenylenediamines: Access to Densely Functionalized Benzo[ f]Imidazo[1,2- d][1,4]Oxazepines and Benzo[ f]Imidazo[1,2- d][1,4]Diazepines. J Org Chem 2022; 87:8956-8969. [PMID: 35765119 DOI: 10.1021/acs.joc.2c00671] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly efficient microwave-assisted copper(II)-catalyzed cyclization cascade was established starting from readily accessible O/N-propargylated 2-hydroxy or 2-aminobenzaldehydes and o-phenylenediamines to synthesize densely functionalized imidazo[1,2-d][1,4]oxazepines and imidazo[1,2-d][1,4]diazepines in high yields (up to 93%). This one-pot two-step process was found to be highly atom economical (-H2O, -H2) and operationally simple and enabled the generation of two new heterocycle rings (seven- and five-membered) and three new C-N bonds in a single synthetic operation. These reactions well tolerated a variety of substituents including electron-donating and electron-withdrawing groups and furnished the desired fused heterocycles in high yields under microwave irradiation in a very short reaction time. The mechanism of the established protocol involves sequential imine formation-intramolecular cyclization-air oxidation followed by 7-exo-dig cyclization steps. A comparative study between the microwave-assisted approach and conventional heating was also performed to demonstrate the advantages of the microwave-assisted protocol in terms of high yield and shorter reaction time.
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Affiliation(s)
- Diksha Rajput
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Atul Kumar
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Tanvi Jandial
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Muthu Karuppasamy
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Raju Suresh Kumar
- Department of Chemistry, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulrahman I Almansour
- Department of Chemistry, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, J&K, India
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32
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Roy S, Paul H, Chatterjee I. Light‐Mediated Aminocatalysis: The Dual‐Catalytic Ability Enabling New Enantioselective Route. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sourav Roy
- IIT Ropar: Indian Institute of Technology Ropar Chemistry INDIA
| | - Hrishikesh Paul
- IIT Ropar: Indian Institute of Technology Ropar Chemistry INDIA
| | - Indranil Chatterjee
- Indian Institute of Technology, Ropar Chemistry Nangal Road 140001 Rupnagar INDIA
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33
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Mizukami D, Iio K, Oda M, Onodera Y, Fuwa H. Tandem Macrolactone Synthesis: Total Synthesis of (-)-Exiguolide by a Macrocyclization/Transannular Pyran Cyclization Strategy. Angew Chem Int Ed Engl 2022; 61:e202202549. [PMID: 35243740 DOI: 10.1002/anie.202202549] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Indexed: 12/25/2022]
Abstract
Tetrahydropyran-containing macrolactones were synthesized by integrating Meyer-Schuster rearrangement, macrocyclic ring-closing metathesis, and transannular oxa-Michael addition under gold and ruthenium catalysis. Single-step access to a variety of 14- to 20-membered macrolactones containing a tetrahydropyran ring was possible from readily available linear precursors in good yields and with moderate to excellent diastereoselectivity. A 13-step synthesis of (-)-exiguolide, an anticancer marine macrolide, showcased the feasibility of our tandem reaction sequence for macrolactone synthesis and also demonstrated the power of transannular reactions for rapid assembly of the tetrahydropyran rings of the target natural product.
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Affiliation(s)
- Daichi Mizukami
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Kei Iio
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Mami Oda
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Yu Onodera
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 981-8577, Japan
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
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34
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Zhu JX, Chen ZC, Du W, Chen YC. Asymmetric Auto-Tandem Palladium Catalysis for 2,4-Dienyl Carbonates: Ligand-Controlled Divergent Synthesis. Angew Chem Int Ed Engl 2022; 61:e202200880. [PMID: 35156289 DOI: 10.1002/anie.202200880] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Indexed: 01/16/2023]
Abstract
Developing new asymmetric auto-tandem catalysis processes, especially in a divergent manner, is highly attractive but extremely challenging. Presented herein is a palladium-catalyzed auto-tandem reaction between 2,4-dienyl carbonates and o-TsNH arylimines or trifluoroacetophenones that proceeds through a consecutive N-allylation, vinylogous addition, π-σ-π isomerization, and another N-allylation sequence. Importantly, switchable diastereodivergent synthesis could be achieved by tuning the chiral bisphosphine ligands, which led to the construction of a broad spectrum of fused tetrahydroquinoline architectures with moderate to excellent enantioselectivity. Ligand control even enabled effective access to regiodivergent azetidine or chemodivergent β-H elimination with fair enantioselectivity, further showing the versatility of the current auto-tandem catalysis.
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Affiliation(s)
- Jian-Xiang Zhu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Zhi-Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.,College of Pharmacy, Third Military Medical University, Chongqing, 400038, China
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35
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Mizukami D, Iio K, Oda M, Onodera Y, Fuwa H. Tandem Macrolactone Synthesis: Total Synthesis of (−)‐Exiguolide by a Macrocyclization/Transannular Pyran Cyclization Strategy. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daichi Mizukami
- Chuo University - Korakuen Campus: Chuo Daigaku - Korakuen Campus Department of Applied Chemistry JAPAN
| | - Kei Iio
- Chuo University - Korakuen Campus: Chuo Daigaku - Korakuen Campus Department of Applied Chemistry JAPAN
| | - Mami Oda
- Chuo University - Korakuen Campus: Chuo Daigaku - Korakuen Campus Department of Applied Chemistry JAPAN
| | - Yu Onodera
- Tohoku University - Katahira Campus: Tohoku Daigaku Graduate School of Life Sciences JAPAN
| | - Haruhiko Fuwa
- Chuo University Department of Applied Chemistry 1-13-27 KasugaBunkyo-ku 112-8551 Tokyo JAPAN
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36
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Koolivand M, Nikoorazm M, Ghorbani‐Choghamaran A, Mohammadi M. A novel cubic Zn‐citric acid‐based MOF as a highly efficient and reusable catalyst for the synthesis of pyranopyrazoles and 5‐substituted 1H‐tetrazoles. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6656] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mostafa Koolivand
- Department of Chemistry, Faculty of Science Ilam University Ilam Iran
| | - Mohsen Nikoorazm
- Department of Chemistry, Faculty of Science Ilam University Ilam Iran
| | | | - Masoud Mohammadi
- Department of Chemistry, Faculty of Science Ilam University Ilam Iran
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37
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Zhu J, Chen Z, Du W, Chen Y. Asymmetric Auto‐Tandem Palladium Catalysis for 2,4‐Dienyl Carbonates: Ligand‐Controlled Divergent Synthesis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jian‐Xiang Zhu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Zhi‐Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
- College of Pharmacy Third Military Medical University Chongqing 400038 China
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38
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39
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Wang Y, Tian H, Li H, Deng X, Zhang Q, Ai Y, Sun Z, Wang Y, Liu L, Hu ZN, Zhang X, Guo R, Xu W, Liang Q, Sun HB. Encapsulating Electron-Rich Pd NPs with Lewis Acidic MOF: Reconciling the Electron-Preference Conflict of the Catalyst for Cascade Condensation via Nitro Reduction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:7949-7961. [PMID: 35130694 DOI: 10.1021/acsami.1c22256] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Cascade reactions take advantage of step-saving and facile operation for obtaining chemicals. Herein, catalytic hydrogenation of nitroarene coupled condensation with β-diketone to afford β-ketoenamines is achieved by an integrated nanocatalyst, Pd-e@UiO-66. The catalyst has the structure of an acid-rich metal-organic framework (MOF), UiO-66-encapsulated electron-rich Pd nanoparticles, and it reconciles the electron-effect contradiction of cascade catalytic reactions: catalytic hydrogenation requires an electron-rich catalyst, while condensation requires electron-deficient Lewis acid sites. The catalyst showed good activity, high chemoselectivity, and universal applicability for the synthesis of β-ketoenamines using nitroarenes. More than 30 β-ketoenamines have been successfully prepared with up to 99% yield via the methodology of relay catalysis. The catalyst exhibited excellent stability to maintain its catalytic performance for more than five cycles. Furthermore, we conducted an in-depth exploration of the reaction mechanism with theoretical calculations.
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Affiliation(s)
- Yiming Wang
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Haimeng Tian
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Hong Li
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Xinchen Deng
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Qiao Zhang
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Yongjian Ai
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, People's Republic of China
- The National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, Nanchang University, Nanchang 330088, Jiangxi, People's Republic of China
| | - Zejun Sun
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Yu Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Lei Liu
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Ze-Nan Hu
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Xinyue Zhang
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Rongxiu Guo
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Wenjuan Xu
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
| | - Qionglin Liang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Hong-Bin Sun
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
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40
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Quintavalla A, Veronesi R, Speziali L, Martinelli A, Zaccheroni N, Mummolo L, Lombardo M. Allenamides Playing Domino: A Redox‐Neutral Photocatalytic Synthesis of Functionalized 2‐Aminofurans. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Arianna Quintavalla
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Ruben Veronesi
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Laura Speziali
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Ada Martinelli
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Nelsi Zaccheroni
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Liviana Mummolo
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Marco Lombardo
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
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41
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Javed S, Ganguly A, Dissanayake GC, Hanson PR. An Iterative Phosphate Tether Mediated Approach for the Synthesis of Complex Polyol Subunits. Org Lett 2022; 24:16-21. [PMID: 34898227 DOI: 10.1021/acs.orglett.1c03350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A pot-economical approach to advanced polyol subunits is reported. The key reactions involved are iterative use of a phosphate tether-mediated one-pot sequential RCM/CM/H2 with subsequent utilization of either a regio-/diasteroselective cuprate addition or a Pd-catalyzed reductive allylic transposition. This method highlights the asymmetric synthesis of 12 complex polyol subunits in 4-6 one-pot sequential operations with a total of 12-14 reactions, of which 4-5 are catalytic, with minimal workup and purification procedures.
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Affiliation(s)
- Salim Javed
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
| | - Arghya Ganguly
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- Department of Chemistry, University of Kansas, 1140 Gray-Little Hall, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Gihan C Dissanayake
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- Department of Chemistry, University of Kansas, 1140 Gray-Little Hall, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Paul R Hanson
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045-7582, United States
- Department of Chemistry, University of Kansas, 1140 Gray-Little Hall, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
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42
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Wang WZ, Shen HR, Liao J, Wen W, Guo QX. Chiral aldehyde induced tandem conjugated addition-lactamization reaction for constructing full-substituted pyroglutamic acids. Org Chem Front 2022. [DOI: 10.1039/d1qo01923f] [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 catalytic asymmetric tandem reaction including a chiral aldehyde catalyzed conjugated addition and an intramolecular lactamization is reported in this work. Under the optimal reaction conditions, various full-substituted pyroglutamic acids...
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43
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Selective synthesis of iminodioxaspirononanes and diazaspirononanes using formic acid-activated Mn(III) oxidation of N1,N3-disubstitued malonamides with 1,1-diarylethenes. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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44
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Zhao X, Zhou Y, Li BL, Du G, Yu Z. Highly diastereoselective cascade dearomatization of 3-(2-isocyanoethyl)indoles with nitrile imines: a facile access to unexpected polycyclic indolines. Org Chem Front 2022. [DOI: 10.1039/d1qo01731d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel cascade annulation between 2-isocyanoethylindoles and hydrazonyl chlorides has been realized to assemble a variety of unexpected polycyclic indoline derivatives with excellent diastereoselectivities under simple reaction conditions.
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Affiliation(s)
- Xiaohu Zhao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yuqiao Zhou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Bao-Lin Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Guangxi Du
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Zhipeng Yu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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45
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Han JJ, Zhang C, Mei GJ, Hua YZ, Jia SK, Wang M. Zinc-catalyzed asymmetric [3 + 2] annulations for construction of chiral spiro[1-indanone-γ-butyrolactones] via a C−N bond cleavage process. Org Chem Front 2022. [DOI: 10.1039/d2qo01204a] [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
An intriguing tandem Michael/lactonization reaction of α-hydroxy-1-indanones and methyleneindolinones has been established in this work. The employ of chiral dinuclear zinc catalysts is essential in achieving highly efficient chirality transfer...
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46
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Pellissier H. Recent developments in enantioselective nickel( ii)-catalyzed conjugate additions. Org Chem Front 2022. [DOI: 10.1039/d2qo01047j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This review updates the field of enantioselective nickel-catalyzed conjugate additions since 2016.
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Affiliation(s)
- Hélène Pellissier
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
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47
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Fuwa H. Total Synthesis of (−)-Exiguolide, a Potent Anticancer Marine Macrolide. HETEROCYCLES 2022. [DOI: 10.3987/rev-22-983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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48
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Oka N, Kanda M, Furuzawa M, Arai W, Ando K. Serendipitous One-Step Synthesis of Cyclopentene Derivatives from 5'-Deoxy-5'-heteroarylsulfonylnucleosides as Nucleoside-Derived Julia-Kocienski Reagents. J Org Chem 2021; 86:16684-16698. [PMID: 34762430 DOI: 10.1021/acs.joc.1c01940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A serendipitous one-step transformation of 5'-deoxy-5'-heteroarylsulfonylnucleosides into cyclopentene derivatives is reported. This unique transformation likely proceeds via a domino reaction initiated by α-deprotonation of the heteroaryl sulfone and subsequent elimination reaction to generate a nucleobase and an α,β-unsaturated sulfone that contains a formyl group. The Michael addition of the nucleobase to the α,β-unsaturated sulfone and the subsequent intramolecular Julia-Kocienski reaction eventually generate the cyclopentene ring. Heteroarylthio and acylthio groups can be incorporated into the cyclopentene core in place of the nucleobase by conducting this reaction in the presence of a heteroarylthiol and a thiocarboxylic acid, respectively. cis,cis-Trisubstituted cyclopentene derivatives are obtained as a single stereoisomer from ribonucleoside-derived Julia-Kocienski sulfones.
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Affiliation(s)
- Natsuhisa Oka
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, Gifu 501-1193, Japan.,Institute for Glyco-core Research (iGCORE), Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Mayuka Kanda
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Minami Furuzawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Wakaba Arai
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Kaori Ando
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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49
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Xu GQ, Xu PF. Visible light organic photoredox catalytic cascade reactions. Chem Commun (Camb) 2021; 57:12914-12935. [PMID: 34782893 DOI: 10.1039/d1cc04883j] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Over the past years, impressive progress has been made in the development of organic photoredox catalytic cascade reactions without the participation of expensive and toxic transition metals under visible light irradiation. These transformations highly depend on the in situ generation of various radical species in the photoredox catalytic cycles. Numerous chemically and biomedically valuable building blocks have been synthesized through this efficient and sustainable protocol. In this review, we highlight the recent progress in this blooming area by presenting a series of new catalytic cascade reactions mediated by organic photoredox catalysts and describe their mechanisms and applications which have appeared in the recent literature.
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Affiliation(s)
- Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China. .,State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou 730000, P. R. China
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50
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Malykhin RS, Golovanov IS, Nelyubina YV, Ioffe SL, Sukhorukov AY. Construction of Saturated Oxazolo[3,2- b][1,2]oxazines via Tandem [3+2]-Cycloaddition/[1,3]-Rearrangement of Cyclic Nitronates and Ketenes. J Org Chem 2021; 86:16337-16348. [PMID: 34783561 DOI: 10.1021/acs.joc.1c01744] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction of six-membered cyclic nitronates with disubstituted ketenes affords hitherto unknown saturated oxazolo[3,2-b][1,2]oxazines possessing up to four contiguous stereogenic centers. The process involves a tandem of [3+2]-cycloaddition across the C═O bond of ketene, followed by a spontaneous [1,3]-rearrangement of transient vinylidene-substituted bicyclic nitrosoacetals. DFT calculations of the mechanism suggest that the [1,3]-O,C-shift proceeds through a recyclization of a biradical intermediate formed by an unusually mild homolytic cleavage of the N-O bond. The resulting products can be utilized as precursors of other fused 1,2-oxazines derivatives, in particular 1,2-oxazino-1,2,4-triazin-3-ones.
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Affiliation(s)
- Roman S Malykhin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation.,Department of Chemistry, M. V. Lomonosov Moscow State University, 119991, Leninskie gory, 1, str. 3, Moscow, Russian Federation
| | - Ivan S Golovanov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, 119991, Vavilov str. 28, Moscow, Russian Federation
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation
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