1
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Aota Y, Doko Y, Kano T, Maruoka K. Brønsted Acid-Catalyzed Intramolecular α-Arylation of Ketones with Phenolic Nucleophiles via Oxy-Allyl Cation Intermediates. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000169] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yusuke Aota
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
| | - Yuki Doko
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
| | - Taichi Kano
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
| | - Keiji Maruoka
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
- Graduate School of Pharmaceutical Sciences; Kyoto University; Sakyo 606-8501 Kyoto Japan
- School of Chemical Engineering and Light Industry; Guangdong University of Technology; 510006 Guangzhou China
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2
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Nguyen TN, Setthakarn K, May JA. Oxyallyl Cation Capture via Electrophilic Deborylation of Organoboronates: Access to α, α'-Substituted Cyclic Ketones. Org Lett 2019; 21:7837-7840. [PMID: 31536365 DOI: 10.1021/acs.orglett.9b02831] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An umpolung strategy to synthesize α,α'-substituted cyclic ketones through the nucleophilic addition of organoboronates to α-hydroxyl silyl enol ethers is described. The reaction proceeds via the trapping of in situ generated oxyallyl cations via the electrophilic deborylation of C(sp2) and C(sp) borates. This efficient and straightforward method provides direct access to α-substituted silyl enol ethers in high yield with complete regioselectivity. Desilylation in a one-pot procedure provides the corresponding α,α'-disubstituted ketones with high diastereoselectivity.
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Affiliation(s)
- Truong N Nguyen
- Department of Chemistry , University of Houston , 3585 Cullen Boulevard, Fleming Building Room 112 , Houston , Texas 77204-5003 , United States
| | - Krit Setthakarn
- Department of Chemistry , University of Houston , 3585 Cullen Boulevard, Fleming Building Room 112 , Houston , Texas 77204-5003 , United States
| | - Jeremy A May
- Department of Chemistry , University of Houston , 3585 Cullen Boulevard, Fleming Building Room 112 , Houston , Texas 77204-5003 , United States
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3
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Wan Y, Zheng X, Ma C. Conjugated Dienyne-Imides as Robust Precursors of 1-Azatrienes for 6π Electrocyclizations to Furo[2,3-b
]dihydropyridine Cores. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yanjun Wan
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Xuchun Zheng
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Cheng Ma
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
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4
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Wan Y, Zheng X, Ma C. Conjugated Dienyne-Imides as Robust Precursors of 1-Azatrienes for 6π Electrocyclizations to Furo[2,3-b
]dihydropyridine Cores. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201800303] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yanjun Wan
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Xuchun Zheng
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Cheng Ma
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
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5
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Ashley WL, Timpy EL, Coombs TC. Flow Photo-Nazarov Reactions of 2-Furyl Vinyl Ketones: Cyclizing a Class of Traditionally Unreactive Heteroaromatic Enones. J Org Chem 2018; 83:2516-2529. [PMID: 29400058 DOI: 10.1021/acs.joc.7b03171] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Nazarov reactions of 2-furyl vinyl ketones and related heteroaromatic enones, to produce furan-fused cyclopentanones using a flow photochemical approach, are described. Compounds possessing this connectivity between heterocycle and ketone (2-furyl, 2-benzofuryl, 2-thiophene-yl, and 2-benzothiophene-yl) have traditionally proven difficult or impossible to cyclize with typical Brønsted and Lewis acid mediated methods. Using mild flow photochemistry conditions and acetic acid (AcOH) or hexafluoroisopropanol (HFIP) as solvent, these compounds were found to cyclize in 45-97% yields, with typical UV exposure times of 3.4-6.8 min. In all cases, 2-furyl and 2-thiophene-yl enones cyclized, whereas 2-benzofuryl and 2-benzothiophene-yl enones exhibited divergent properties with reactivity patterns tied to the identity of the vinyl group. This report discloses the first photo-Nazarov reactions of tetrahydropyridine-substituted 2-furyl ketones, providing a direct approach to the corresponding fused heterocyclic motifs built around a central cyclopentanone. These motifs constitute the core structures of biologically active natural products, including the marine alkaloid nakadomarin A.
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Affiliation(s)
- William L Ashley
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington , Dobo Hall, Wilmington, North Carolina 28403, United States
| | - Evan L Timpy
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington , Dobo Hall, Wilmington, North Carolina 28403, United States
| | - Thomas C Coombs
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington , Dobo Hall, Wilmington, North Carolina 28403, United States
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6
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He CQ, Yu P, Lam YH, Houk KN. Origins of Stereoselectivity in Chiral Aminoalcohol Catalysis of Oxyallyl Cation-Indole Reactions. Org Lett 2017; 19:5685-5688. [PMID: 28976202 DOI: 10.1021/acs.orglett.7b02851] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantioselective coupling of indoles with racemic α-tosyloxy ketones mediated by a chiral amino alcohol catalyst is studied with density functional theory (DFT) calculations. The addition of indole to an oxyallyl cation intrinsically favors the (S,S) and (R,R) stereoisomeric products through electrostatic interactions in the transition state. Our model shows that the enantioselectivity is controlled by the cyclohexane moiety of the catalyst; selectivity diminishes upon removal of the cyclohexane ring. Substitution to enhance the enantioselectivity of this reaction is proposed.
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Affiliation(s)
- Cyndi Qixin He
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - Peiyuan Yu
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - Yu-Hong Lam
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
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7
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Sudhakar G, Mahesh SK, Vemulapalli SPB, Nanubolu JB. Nazarov Cyclization and Tandem [4 + 2]-Cycloaddition Reactions of Donor–Acceptor Cyclopropanes. Org Lett 2017; 19:4500-4503. [DOI: 10.1021/acs.orglett.7b02061] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gangarajula Sudhakar
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - S. K. Mahesh
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - S. Phani Babu Vemulapalli
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
| | - Jagadeesh Babu Nanubolu
- Department of CPC (Organic Chemistry-II), ‡Centre for NMR and
Structural Chemistry, §Centre for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, India
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8
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Vinogradov MG, Turova OV, Zlotin SG. Nazarov reaction: current trends and recent advances in the synthesis of natural compounds and their analogs. Org Biomol Chem 2017; 15:8245-8269. [DOI: 10.1039/c7ob01981e] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Recent applications of the Nazarov reaction to stereoselective synthesis of pharmacology-relevant cyclopentenone scaffolds are summarized.
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Affiliation(s)
- Maxim G. Vinogradov
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Olga V. Turova
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Sergei G. Zlotin
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
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9
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William R, Wang S, Mallick A, Liu XW. Interrupting Nazarov Reaction with Different Trapping Modality: Utilizing Potassium Alkynyltrifluoroborate as a σ-Nucleophile. Org Lett 2016; 18:4458-61. [DOI: 10.1021/acs.orglett.6b01606] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ronny William
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Siming Wang
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Asadulla Mallick
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Xue-Wei Liu
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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10
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Williams CW, Shenje R, France S. Catalytic, Interrupted Formal Homo-Nazarov Cyclization with (Hetero)arenes: Access to α-(Hetero)aryl Cyclohexanones. J Org Chem 2016; 81:8253-67. [DOI: 10.1021/acs.joc.6b01312] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Corey W. Williams
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Raynold Shenje
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Stefan France
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Petit
Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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11
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Aguilar E, Sanz R, Fernández-Rodríguez MA, García-García P. 1,3-Dien-5-ynes: Versatile Building Blocks for the Synthesis of Carbo- and Heterocycles. Chem Rev 2016; 116:8256-311. [PMID: 27410164 DOI: 10.1021/acs.chemrev.6b00181] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
1,3-Dien-5-ynes have been extensively used as starting materials for the synthesis of a wide number of different carbo- and heterocycles. The aim of this review is to give an overview of their utility in organic synthesis, highlighting the variety of compounds that can be directly accessed from single reactions over these systems. Thus, cycloaromatization processes are initially commented, followed by reactions directed toward the syntheses of five-membered rings, other carbocycles and, finally, heterocycles. The diverse methodologies that have been developed for the synthesis of each of these types of compounds from 1,3-dien-5-ynes are presented, emphasizing the influence of the reaction conditions and the use of additional reagents in the outcome of the transformations.
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Affiliation(s)
- Enrique Aguilar
- Instituto Universitario de Química Organometálica "Enrique Moles", Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo , C/Julián Clavería 8, 33006 Oviedo, Spain
| | - Roberto Sanz
- Departamento de Química, Área de Química Orgánica, Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Manuel A Fernández-Rodríguez
- Departamento de Química, Área de Química Orgánica, Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Patricia García-García
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá , 28871 Alcalá de Henares, Madrid, Spain
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12
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13
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Kitamura K, Shimada N, Stewart C, Atesin AC, Ateşin TA, Tius MA. Enantioselective Palladium(0)-Catalyzed Nazarov-Type Cyclization. Angew Chem Int Ed Engl 2015; 54:6288-91. [PMID: 25833716 DOI: 10.1002/anie.201500881] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/06/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Kei Kitamura
- Chemistry Department, University of Hawaii at Manoa, 2545 The Mall, Honolulu, HI 96822 (USA)
| | - Naoyuki Shimada
- Chemistry Department, University of Hawaii at Manoa, 2545 The Mall, Honolulu, HI 96822 (USA)
| | - Craig Stewart
- Chemistry Department, University of Hawaii at Manoa, 2545 The Mall, Honolulu, HI 96822 (USA)
| | - Abdurrahman C Atesin
- Chemistry Department, The University of Texas-Pan American, 1201 West University Drive, Edinburg, TX 78539-2999 (USA)
| | - Tülay A Ateşin
- Chemistry Department, The University of Texas-Pan American, 1201 West University Drive, Edinburg, TX 78539-2999 (USA)
| | - Marcus A Tius
- Chemistry Department, University of Hawaii at Manoa, 2545 The Mall, Honolulu, HI 96822 (USA).
- University of Hawaii Cancer Center, 701 Ilalo Street, Honolulu, HI 96813 (USA).
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14
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Xu Z, Ren H, Wang L, Tang Y. Efficient catalytic enantioselective Nazarov cyclizations of divinyl ketoesters. Org Chem Front 2015. [DOI: 10.1039/c5qo00099h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient catalytic enantioselective Nazarov cyclization of divinyl ketoesters is developed using a BOX/Cu(ii) catalyst, affording various optically active cyclopent-2-enone esters.
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Affiliation(s)
- Zhou Xu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Hai Ren
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Lijia Wang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Yong Tang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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15
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Shenje R, Williams CW, Francois KM, France S. Catalysis and Chemodivergence in the Interrupted, Formal Homo-Nazarov Cyclization Using Allylsilanes. Org Lett 2014; 16:6468-71. [DOI: 10.1021/ol503305r] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Raynold Shenje
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Corey W. Williams
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Katherine M. Francois
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Stefan France
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Petit
Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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16
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Wu YK, Dunbar CR, McDonald R, Ferguson MJ, West FG. Experimental and Computational Studies on Interrupted Nazarov Reactions: Exploration of Umpolung Reactivity at the α-Carbon of Cyclopentanones. J Am Chem Soc 2014; 136:14903-11. [DOI: 10.1021/ja507638r] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Yen-Ku Wu
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - Christine R. Dunbar
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - Robert McDonald
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - Michael J. Ferguson
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - F. G. West
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
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17
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William R, Wang S, Ding F, Arviana EN, Liu XW. Interrupted Imino-Nazarov Cyclization of 1-Aminopentadienyl Cation and Related Cascade Process. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405251] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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William R, Wang S, Ding F, Arviana EN, Liu XW. Interrupted Imino-Nazarov Cyclization of 1-Aminopentadienyl Cation and Related Cascade Process. Angew Chem Int Ed Engl 2014; 53:10742-6. [DOI: 10.1002/anie.201405251] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 06/23/2014] [Indexed: 11/07/2022]
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19
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Wu YK, West FG. Formal Homologous Aldol Reactions: Interrupting the Nazarov Cyclization via Carboalkoxylation of Alkynes. Org Lett 2014; 16:2534-7. [DOI: 10.1021/ol500914a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yen-Ku Wu
- Department
of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry
Center, Edmonton, AB T6G
2G2, Canada
| | - F. G. West
- Department
of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry
Center, Edmonton, AB T6G
2G2, Canada
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20
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Yadav VK, Naganaboina VK, Hulikal V. Allylsilane-interrupted homo-Nazarov cyclization and synthesis of bicyclo[3.2.1]octan-8-ones. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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22
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Kwon Y, McDonald R, West FG. Organoaluminum-Mediated Interrupted Nazarov Reaction. Angew Chem Int Ed Engl 2013; 52:8616-9. [DOI: 10.1002/anie.201303996] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 06/07/2013] [Indexed: 11/10/2022]
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23
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Kwon Y, McDonald R, West FG. Organoaluminum-Mediated Interrupted Nazarov Reaction. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303996] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Spencer WT, Vaidya T, Frontier AJ. Beyond the Divinyl Ketone: Innovations in the Generation and Nazarov Cyclization of Pentadienyl Cation Intermediates. European J Org Chem 2013; 2013:10.1002/ejoc.201300134. [PMID: 24348092 PMCID: PMC3862358 DOI: 10.1002/ejoc.201300134] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Indexed: 11/09/2022]
Abstract
The requirement for new strategies for synthesizing five-membered carbocycles has driven an expansion in the study of the Nazarov cyclization. This renewed interest in the reaction has led to the discovery of several interesting new methods for generating the pentadienyl cation intermediate central to the cyclization. Methods reviewed include carbon-heteroatom ionization, functionalization of a double bond, nucleophilic addition, or electrocyclic ring opening. Additional variations employ unconventional substrates to produce novel pentacycles, such as the iso- and imino-Nazarov. Herein, we provide an overview of these unconventional, yet highly useful versions of the Nazarov cyclization.
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Affiliation(s)
- William T. Spencer
- Department of Chemistry, University of Rochester, RC Box 270216, Rochester, NY 14627
| | - Tulaza Vaidya
- Department of Chemistry and Chemical Biology, Cornell University Baker Laboratory Ithaca, NY 14853
| | - Alison J. Frontier
- Department of Chemistry, University of Rochester, RC Box 270216, Rochester, NY 14627
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25
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Vander Wal MN, Dilger AK, MacMillan DWC. Development of a generic activation mode: nucleophilic α-substitution of ketones via oxy-allyl cations. Chem Sci 2013. [DOI: 10.1039/c3sc51266e] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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26
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Tang Q, Chen X, Tiwari B, Chi YR. Addition of indoles to oxyallyl cations for facile access to α-indole carbonyl compounds. Org Lett 2012; 14:1922-5. [PMID: 22455439 DOI: 10.1021/ol300591z] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A direct coupling of unprotected indoles and α-halo ketones via in situ generated oxyallyl cation intermediates is described. The reactions efficiently afford α-indole carbonyl compounds with good to quantitative yields.
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Affiliation(s)
- Qiang Tang
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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27
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28
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Rueping M, Ieawsuwan W. Asymmetric Brønsted acid catalyzed carbonyl activation – organocatalytic domino electrocyclization–halogenation reaction. Chem Commun (Camb) 2011; 47:11450-2. [DOI: 10.1039/c1cc15289k] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Marx VM, LeFort FM, Burnell DJ. Trapping the Oxyallyl Cation Intermediate Derived from the Nazarov Cyclization of Allenyl Vinyl Ketones with Nitrogen Heterocycles. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000722] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Yao W, Pan L, Zhang Y, Wang G, Wang X, Ma C. Three-Component Assembly and Divergent Ring-Expansion Cascades of Functionalized 2-Iminooxetanes. Angew Chem Int Ed Engl 2010; 49:9210-4. [DOI: 10.1002/anie.201004685] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Yao W, Pan L, Zhang Y, Wang G, Wang X, Ma C. Three-Component Assembly and Divergent Ring-Expansion Cascades of Functionalized 2-Iminooxetanes. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004685] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Affiliation(s)
- Yen-Ku Wu
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, AB, Canada T6G 2G2
| | - F. G. West
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, AB, Canada T6G 2G2
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Cao P, Deng C, Zhou YY, Sun XL, Zheng JC, Xie Z, Tang Y. Asymmetric Nazarov Reaction Catalyzed by Chiral Tris(oxazoline)/Copper(II). Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907266] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cao P, Deng C, Zhou YY, Sun XL, Zheng JC, Xie Z, Tang Y. Asymmetric Nazarov Reaction Catalyzed by Chiral Tris(oxazoline)/Copper(II). Angew Chem Int Ed Engl 2010; 49:4463-6. [DOI: 10.1002/anie.200907266] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Marx VM, Burnell DJ. Nazarov cyclizations of an allenyl vinyl ketone with interception of the oxyallyl cation intermediate for the formation of carbon-carbon bonds. J Am Chem Soc 2010; 132:1685-9. [PMID: 20078119 DOI: 10.1021/ja909073r] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of an allenyl vinyl ketone with BF(3) x Et(2)O leads to a cyclic oxyallyl cation by a Nazarov reaction, and when this reaction is conducted in the presence of an acyclic diene, [4 + 3] and [3 + 2] products are obtained efficiently with high regio- and stereoselectivity. The proportion of [4 + 3] to [3 + 2] product depends on the substitution on the diene. Cyclic dienes react with the oxyallyl cation by forming only one carbon-carbon bond, but the site of bond formation can be affected by steric hindrance. Electron-rich alkenes intercept the allyl cation by forming one carbon-carbon bond, or two carbon-carbon bonds through [3 + 2] cyclization. In some instances, further treatment of the initial products with BF(3) x Et(2)O leads to equilibrated products in good yield.
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Affiliation(s)
- Vanessa M Marx
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4J3, Canada
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Bow WF, Basak AK, Jolit A, Vicic DA, Tius MA. Enamine-iminium ion Nazarov cyclization of alpha-ketoenones. Org Lett 2010; 12:440-3. [PMID: 20030316 DOI: 10.1021/ol9025765] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mono-triflate salts of some chiral nonracemic 1,2-diamines react with alpha-ketoenones in a stoichiometric reaction to form products of the Nazarov cyclization in high enantiomeric ratios. The mechanism appears to involve rearrangement of an enamine-iminium ion.
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Affiliation(s)
- William F Bow
- Department of Chemistry, 2545 The Mall, University of Hawaii, Honolulu, Hawaii 96822, USA
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Shimada N, Ashburn BO, Basak AK, Bow WF, Vicic DA, Tius MA. Organocatalytic asymmetric aza-Nazarov cyclization of an azirine. Chem Commun (Camb) 2010; 46:3774-5. [DOI: 10.1039/b927564a] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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38
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G. West F, J. Rieder C, J. Fradette R. Heteroaromatic Trapping of Tricyclic 2-Oxidocyclopentenyl Cations: A Surprisingly Efficient Example of Intermolecular Interrupted Nazarov Reaction. HETEROCYCLES 2010. [DOI: 10.3987/com-09-s(s)132] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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39
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Marx VM, Cameron TS, Burnell DJ. Formation of halogenated cyclopent-2-enone derivatives by interrupted Nazarov cyclizations. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.10.052] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rieder CJ, Winberg KJ, West FG. Cyclization of Cross-Conjugated Trienes: The Vinylogous Nazarov Reaction. J Am Chem Soc 2009; 131:7504-5. [DOI: 10.1021/ja9023226] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Curtis J. Rieder
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, AB, T6G 2G2, Canada
| | - Karl J. Winberg
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, AB, T6G 2G2, Canada
| | - F. G. West
- Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Centre, Edmonton, AB, T6G 2G2, Canada
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Marx VM, Burnell DJ. Synthesis of 5-hydroxycyclopent-2-enones from allenyl vinyl ketones via an interrupted Nazarov cyclization. Org Lett 2009; 11:1229-31. [PMID: 19215105 DOI: 10.1021/ol900029d] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of an allenyl vinyl ketone with trifluoroacetic acid leads to Nazarov cyclization, and the intermediate carbocation is trapped efficiently by trifluoroacetate. Hydrolysis of the ester with methanol and basic alumina provides, in good to excellent overall yield, a 5-hydroxycyclopent-2-enone in which the alcohol is predominantly trans to a substituent at C-4.
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Affiliation(s)
- Vanessa M Marx
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J3
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42
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Grant TN, Rieder CJ, West FG. Interrupting the Nazarov reaction: domino and cascade processes utilizing cyclopentenyl cations. Chem Commun (Camb) 2009:5676-88. [PMID: 19774236 DOI: 10.1039/b908515g] [Citation(s) in RCA: 226] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Tina N Grant
- Department of Chemistry, Faculty of Science, E3-43 Gunning-Lemieux Chemistry Centre, University of Alberta, Edmonton, AB, Canada T6G 2G2
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Russel JS, Pelkey ET, Yoon-Miller SJ. Chapter 5.2: Five-Membered Ring Systems: Pyrroles and Benzo Analogs. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s0959-6380(09)70033-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
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44
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Suárez-Pantiga S, Rubio E, Alvarez-Rúa C, González JM. Intermolecular Reaction of Internal Alkynes and Imines: Propargyl Tosylates as Key Partners in a Gold-Catalyzed [4 + 1] Unusual Cyclization Leading to Cyclopent-2-enimines. Org Lett 2008; 11:13-6. [PMID: 19046069 DOI: 10.1021/ol8025523] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Samuel Suárez-Pantiga
- Instituto Universitario de Química Organometálica “Enrique Moles”−Unidad Asociada al C.S.I.C. and Departamento de Química Orgánica e Inorgánica, and Servicio de Rayos X, Servicios Científico-Técnicos, Universidad de Oviedo, Julián Claveria, 8, 33006 Oviedo, Spain
| | - Eduardo Rubio
- Instituto Universitario de Química Organometálica “Enrique Moles”−Unidad Asociada al C.S.I.C. and Departamento de Química Orgánica e Inorgánica, and Servicio de Rayos X, Servicios Científico-Técnicos, Universidad de Oviedo, Julián Claveria, 8, 33006 Oviedo, Spain
| | - Carmen Alvarez-Rúa
- Instituto Universitario de Química Organometálica “Enrique Moles”−Unidad Asociada al C.S.I.C. and Departamento de Química Orgánica e Inorgánica, and Servicio de Rayos X, Servicios Científico-Técnicos, Universidad de Oviedo, Julián Claveria, 8, 33006 Oviedo, Spain
| | - José M. González
- Instituto Universitario de Química Organometálica “Enrique Moles”−Unidad Asociada al C.S.I.C. and Departamento de Química Orgánica e Inorgánica, and Servicio de Rayos X, Servicios Científico-Técnicos, Universidad de Oviedo, Julián Claveria, 8, 33006 Oviedo, Spain
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