1
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Wang N, Xu HJ, Li T, Ye LW, Zhou B. Copper-Catalyzed [2 + 2] Cyclization/Ring Expansion of Ene-Ynamides: Construction of Medium- and Large-Sized Rings. Org Lett 2024; 26:3861-3866. [PMID: 38679881 DOI: 10.1021/acs.orglett.4c01013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Catalytic cyclization of enynes is an efficient approach for the preparation of cyclic compounds, and a large variety of four- to six-membered rings could be synthesized using this method. However, it has been rarely employed for the construction of medium- and large-sized rings. Herein, we describe a copper-catalyzed cycloisomerization of ene-ynamides through a [2 + 2] cyclization/electrocyclic ring opening cascade, leading to the atom-economical assembly of indole-fused medium- and large-sized rings in moderate to excellent yields under mild reaction conditions. Importantly, the synthetic utility of this reaction was demonstrated by the convenient synthesis of iprindole.
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Affiliation(s)
- Nan Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Hao-Jin Xu
- Key Laboratory of Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Henan 473061, China
| | - Long-Wu Ye
- Key Laboratory of Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Bo Zhou
- Key Laboratory of Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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2
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Wan X, Wang S, Wu C, Gan J, Wang C. Yb(OTf) 3-Mediated Annulation of Cyclopropane-1,1-dicarbonitriles with 2-Aminobenzaldehydes for Synthesis of Polysubstituted Quinolines. Org Lett 2021; 23:8799-8803. [PMID: 34743522 DOI: 10.1021/acs.orglett.1c03301] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A Yb(OTf)3-mediated annulation of cyclopropane-1,1-dicarbonitriles and 2-aminobenzaldehydes for the synthesis of polysubstituted quinolines in generally good yields was investigated. In the cascade reaction, the protocol includes ring opening, intermolecular nuclophilic addition, intramolecular nuclophilic addition, and demalononitrile aromatization, in which the malononitrile group serves as a deciduous directing group mediated by Yb(OTf)3.
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Affiliation(s)
- Xinyi Wan
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
| | - Shan Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
| | - Chengjun Wu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
| | - Jianbo Gan
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
| | - Cunde Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
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3
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Greiner LC, Inuki S, Arichi N, Oishi S, Suzuki R, Iwai T, Sawamura M, Hashmi ASK, Ohno H. Access to Indole-Fused Benzannulated Medium-Sized Rings through a Gold(I)-Catalyzed Cascade Cyclization of Azido-Alkynes. Chemistry 2021; 27:12992-12997. [PMID: 34110644 DOI: 10.1002/chem.202101824] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Indexed: 02/05/2023]
Abstract
Because benzannulated and indole-fused medium-sized rings are found in many bioactive compounds, combining these fragments might lead to unexplored areas of biologically relevant and uncovered chemical space. Herein is shown that α-imino gold carbene chemistry can play an important role in solving the difficulty in the formation of medium-sized rings. Namely, phenylene-tethered azido-alkynes undergo arylative cyclization through the formation of a gold carbene intermediate to afford benzannulated indole-fused medium-sized tetracycles. The reactions allow a range of different aryl substitution patterns and efficient access to these otherwise difficult-to-obtain medium-sized rings. This study also demonstrates the feasibility of the semihollow-shaped C-dtbm ligand for the construction of a nine-membered ring.
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Affiliation(s)
- Luca C Greiner
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Norihito Arichi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.,Current Address: Department of Medicinal Chemistry, Kyoto Pharmaceutical University, Yashima-ku, Kyoto, 607-8412, Japan
| | - Rikito Suzuki
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Tomohiro Iwai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.,Current Address: Graduate School of Arts and Sciences, The University of Tokyo, Meguro-ku, Tokyo, 153-8902, Japan
| | - Masaya Sawamura
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
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4
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Unnava R, Chahal K, Reddy KR. Synthesis of substituted 1,2-dihydroisoquinolines via Ni(ii) and Cu(i)/Ag(i) catalyzed double nucleophilic addition of arylamines to ortho-alkynyl donor-acceptor cyclopropanes (o-ADACs). Org Biomol Chem 2021; 19:6025-6029. [PMID: 34160541 DOI: 10.1039/d1ob00760b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A concise approach for the synthesis of substituted 1,2-dihydroisoquinolines via double nucleophilic addition of primary arylamines to ortho-alkynyl donor-acceptor cyclopropanes (o-ADACs) in the presence of a catalytic Ni(ClO4)2·6H2O and CuI/AgOTf system has been developed. Further applying this protocol, some of the derived malonates were converted into the corresponding monoesters under Krapcho decarboxylation reaction conditions. Thereafter, these esters were transformed into the respective acids and alcohols. In addition, multifunctionalized 4-(2,2,2-trifluoroacetyl) 1,2-dihydroisoquinolines were also obtained with excess TFAA.
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Affiliation(s)
- Ramanjaneyulu Unnava
- Catalysis and Fine Chemicals Division, CSIR Indian Institute of Chemical Technology, Tarnaka, Hyderabad - 500007, India.
| | - Kapil Chahal
- Catalysis and Fine Chemicals Division, CSIR Indian Institute of Chemical Technology, Tarnaka, Hyderabad - 500007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, UP, India
| | - Kallu Rajender Reddy
- Catalysis and Fine Chemicals Division, CSIR Indian Institute of Chemical Technology, Tarnaka, Hyderabad - 500007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, UP, India
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5
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Ghosh K, Das S. Recent advances in ring-opening of donor acceptor cyclopropanes using C-nucleophiles. Org Biomol Chem 2021; 19:965-982. [PMID: 33471020 DOI: 10.1039/d0ob02437f] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ring-opening transformations of donor-acceptor cyclopropanes (DAC) with carbon-centered nucleophiles is a simple, straight-forward approach to 1,3-bifunctional compounds that has witnessed remarkable progress over the past several years. To date, different reactivity patterns of DACs have been successfully exploited in racemic/stereoselective syntheses of various acyclic compounds or carbocycles with an impressive structural diversity. The thriving strategies have been successfully utilized in multistep synthesis of complex target molecules. Herein, the recent advances (2015-present) in the ring-opening of DAC involving electron rich arenes and indoles, active methylene compounds, various dipolarophiles, organoborates/boronates, vinyl ethers etc. following Friedel-Crafts alkylation, annulation/formal cycloaddition reaction, organocatalytic reaction, Nazarov cyclisation etc. are presented.
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Affiliation(s)
- Koena Ghosh
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata 700 073, India.
| | - Subhomoy Das
- Department of Chemistry, Bar Ilan University, Ramat Gan 5290002, Israel
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6
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Andreev IA, Ratmanova NK, Augustin AU, Ivanova OA, Levina II, Khrustalev VN, Werz DB, Trushkov IV. Protic Ionic Liquid as Reagent, Catalyst, and Solvent: 1-Methylimidazolium Thiocyanate. Angew Chem Int Ed Engl 2021; 60:7927-7934. [PMID: 33433034 PMCID: PMC8048580 DOI: 10.1002/anie.202016593] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Indexed: 02/06/2023]
Abstract
We propose a new concept of the triple role of protic ionic liquids with nucleophilic anions: a) a regenerable solvent, b) a Brønsted acid inducing diverse transformations via general acid catalysis, and c) a source of a nucleophile. The efficiency of this strategy was demonstrated using thiocyanate-based protic ionic liquids for the ring-opening of donor-acceptor cyclopropanes. A wide variety of activated cyclopropanes were found to react with 1-methylimidazolium thiocyanate under mild metal-free conditions via unusual nitrogen attack of the ambident thiocyanate ion on the electrophilic center of the three-membered ring affording pyrrolidine-2-thiones bearing donor and acceptor substituents at the C(5) and C(3) atoms, respectively, in a single time-efficient step. The ability of 1-methylimidazolium thiocyanate to serve as a triplex reagent was exemplarily illustrated by (4+2)-annulation with 1-acyl-2-(2-hydroxyphenyl)cyclopropane, epoxide ring-opening and other organic transformations.
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Affiliation(s)
- Ivan A. Andreev
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and ImmunologySamory Mashela 1117997MoscowRussian Federation
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of SciencesLeninsky pr. 47119991MoscowRussian Federation
| | - Nina K. Ratmanova
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and ImmunologySamory Mashela 1117997MoscowRussian Federation
| | - André U. Augustin
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Olga A. Ivanova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of SciencesLeninsky pr. 47119991MoscowRussian Federation
- Department of ChemistryLomonosov Moscow State UniversityLeninskie Gory 1–3119991MoscowRussian Federation
| | - Irina I. Levina
- Institute of Biochemical PhysicsRussian Academy of SciencesKosygina 4119334MoscowRussian Federation
| | - Victor N. Khrustalev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of SciencesLeninsky pr. 47119991MoscowRussian Federation
- Faculty of ScienceRUDN UniversityMiklukho-Maklaya 6117198MoscowRussian Federation
| | - Daniel B. Werz
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Igor V. Trushkov
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and ImmunologySamory Mashela 1117997MoscowRussian Federation
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of SciencesLeninsky pr. 47119991MoscowRussian Federation
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7
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Andreev IA, Ratmanova NK, Augustin AU, Ivanova OA, Levina II, Khrustalev VN, Werz DB, Trushkov IV. Protic Ionic Liquid as Reagent, Catalyst, and Solvent: 1‐Methylimidazolium Thiocyanate. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016593] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Ivan A. Andreev
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology Samory Mashela 1 117997 Moscow Russian Federation
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences Leninsky pr. 47 119991 Moscow Russian Federation
| | - Nina K. Ratmanova
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology Samory Mashela 1 117997 Moscow Russian Federation
| | - André U. Augustin
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Olga A. Ivanova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences Leninsky pr. 47 119991 Moscow Russian Federation
- Department of Chemistry Lomonosov Moscow State University Leninskie Gory 1–3 119991 Moscow Russian Federation
| | - Irina I. Levina
- Institute of Biochemical Physics Russian Academy of Sciences Kosygina 4 119334 Moscow Russian Federation
| | - Victor N. Khrustalev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences Leninsky pr. 47 119991 Moscow Russian Federation
- Faculty of Science RUDN University Miklukho-Maklaya 6 117198 Moscow Russian Federation
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Igor V. Trushkov
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology Samory Mashela 1 117997 Moscow Russian Federation
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences Leninsky pr. 47 119991 Moscow Russian Federation
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8
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Caillé J, Robiette R. Cycloaddition of cyclopropanes for the elaboration of medium-sized carbocycles. Org Biomol Chem 2021; 19:5702-5724. [PMID: 34114583 DOI: 10.1039/d1ob00838b] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The stereocontrolled formation of medium-sized carbocycles is a major goal in modern organic chemistry due to their widespread occurrence in natural products and pharmaceutically active ingredients. One approach consists in the use of cycloaddition reactions which notably results in high selectivities and atom-economy. To this end, cyclopropanes are ideal substrates since they can provide readily functionalized three- or five-carbon synthons. Herein we report advances made in cycloaddition reactions of cyclopropanes towards the synthesis of medium-sized carbocycles via transition metal catalysis or Lewis acid catalysis.
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Affiliation(s)
- Julien Caillé
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1 box L4.01.02, 1348 Louvain-la-Neuve, Belgium. and Institut de Chimie et des Matériaux Paris Est (ICMPE), UMR-CNRS 7182, Université Paris Est Créteil (UPEC), 2 Rue Henri Dunant, 94320 Thiais, France.
| | - Raphaël Robiette
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1 box L4.01.02, 1348 Louvain-la-Neuve, Belgium.
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9
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Millward MJ, Ellis E, Ward JW, Clayden J. Hydantoin-bridged medium ring scaffolds by migratory insertion of urea-tethered nitrile anions into aromatic C-N bonds. Chem Sci 2020; 12:2091-2096. [PMID: 34163972 PMCID: PMC8179327 DOI: 10.1039/d0sc06188c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Bicyclic or tricyclic nitrogen-containing heterocyclic scaffolds were constructed rapidly by intramolecular nucleophilic aromatic substitution of metallated nitriles tethered by a urea linkage to a series of electronically unactivated heterocyclic precursors. The substitution reaction constitutes a ring expansion, enabled by the conformationally constrained tether between the nitrile and the heterocycle. Attack of the metallated urea leaving group on the nitrile generates a hydantoin that bridges the polycyclic products. X-ray crystallography reveals ring-dependant strain within the hydantoin.
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Affiliation(s)
- Makenzie J Millward
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Emily Ellis
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - John W Ward
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Jonathan Clayden
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
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10
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Vonteddu NR, Solanke PR, Nayani K, Chandrasekhar S. Cation Triggered Domino Aza-Piancatelli Rearrangement/Friedel-Crafts Alkylation of Indole-Tethered Furfuyl Alcohols to Access Cycloocta[ b]indole Core of Alkaloids. Org Lett 2020; 22:8555-8560. [PMID: 33079545 DOI: 10.1021/acs.orglett.0c03155] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A domino approach to bridged cycloocta[b]indolone through a cascade of aza-Piancatelli rearrangement/Friedel-Crafts alkylation is developed. This transformation has been realized by reaction of an indole-tethered 2-furylcarbinol and substituted aniline in the presence of a Lewis acid to initiate aza-Piancatelli rearrangement followed by an in situ intramolecular Friedel-Crafts alkylation to access bridged tetracyclic frameworks in one pot.
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Affiliation(s)
- Nagarjuna Reddy Vonteddu
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.,Cipla Ltd, MIDC Patalganga, Rasayani, Maharashtra 410220, India
| | - Pooja R Solanke
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kiranmai Nayani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Srivari Chandrasekhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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11
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Wu YH, Zhang LY, Wang NX, Xing Y. Recent advances in the rare-earth metal triflates-catalyzed organic reactions. CATALYSIS REVIEWS 2020. [DOI: 10.1080/01614940.2020.1831758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yue-Hua Wu
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Lei-Yang Zhang
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Nai-Xing Wang
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Yalan Xing
- Department of Chemistry, William Paterson University of New Jersey, New Jersey, United States
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12
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Harada S. [Catalytic Synthesis of Optically Active Polycyclic Heterocyclic Compounds]. YAKUGAKU ZASSHI 2020; 140:1213-1224. [PMID: 32999200 DOI: 10.1248/yakushi.20-00137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In basic pharmaceutical sciences to achieve drug development, research on the efficient chemical synthesis of small molecules having cyclic skeletons is important. We have been engaged in the development of artificial catalysts for asymmetric ring formation reactions that exclusively synthesize right-handed or left-handed cyclic compounds and have achieved the construction of optically active cyclic skeletons using our original catalysts. The synthesis of biologically active compounds was facilitated through six-membered ring construction by Diels-Alder reaction of Danishefsky diene; however, no asymmetric variant of the reaction has been achieved. We approached this unresolved issue using multi-coordinated lanthanide metals. A new chiral lanthanide catalyst was developed, and the catalytic asymmetric Diels-Alder reaction of Danishefsky diene was realized for the first time. By modifying the chemical structure of Danishefsky diene, we applied the lanthanide catalyst to the syntheses of polycyclic compounds and biologically active compounds. We achieved the asymmetric synthesis of natural products, antibacterial and antimalarial compounds, and an anti-obesity drug lead compound. Moreover, the novel catalyst exhibited higher performance than the previously reported ones. The latest generation of the catalyst can be handled stably in air at room temperature. Furthermore, we succeeded in the development of new catalysts by focusing on the properties of its metal precursors, such as nickel and indium, and achieved the construction of polycyclic skeletons by using these catalysts.
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Affiliation(s)
- Shinji Harada
- Graduate School of Pharmaceutical Sciences, Chiba University.,Molecular Chirality Research Center, Chiba University
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13
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Chang F, Shen B, Wang S, Lin L, Feng X. Lewis acid catalysed asymmetric cascade reaction of cyclopropyl ketones: concise synthesis of pyrrolobenzothiazoles. Chem Commun (Camb) 2020; 56:13429-13432. [DOI: 10.1039/d0cc05667g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A concise method to synthesize pyrrolobenzothiazoles via a cascade reaction of cyclopropyl ketones was developed by using a chiral N,N′-dioxide-scandium(iii) complex catalyst.
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Affiliation(s)
- Fenzhen Chang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Bin Shen
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Sijing Wang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
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14
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Kong XF, Guo XY, Gu ZY, Wei LS, Liu LL, Mo DL, Pan CX, Su GF. Silver(i)-catalyzed selective hydroalkoxylation of C2-alkynyl quinazolinones to synthesize quinazolinone-fused eight-membered N,O-heterocycles. Org Chem Front 2020. [DOI: 10.1039/d0qo00437e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A silver-catalyzed selective 8-endo-dig cyclization of C2-alkynyl quinazolinones was developed to prepare a series of novel quinazolinone-fused eight-membered N,O-heterocycles in good-to-excellent yields under mild reaction conditions.
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Affiliation(s)
- Xiang-Fei Kong
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Xiu-Yun Guo
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Zi-Yu Gu
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Lin-Su Wei
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Lu-Lu Liu
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Dong-Liang Mo
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Cheng-Xue Pan
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Gui-Fa Su
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
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