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Prakash M, Samanta S. Base-promoted cyclization of ortho-hydroxyacetophenones with in situ generated cyclopropenes: diastereoselective access to spirobenzo[ b]oxepines and related precursors. Org Biomol Chem 2023; 21:2001-2014. [PMID: 36789745 DOI: 10.1039/d3ob00077j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An unprecedented [5 + 2] spirocyclization route to obtain a vital class of functionalized spirobenzo[b]oxepine-cyclopropanes in good to high yields with excellent diastereoselectivities is reported. This domino reaction proceeds through a regioselective oxa-Michael addition of ortho-hydroxyacetophenones as 1,5-binucleophiles to in situ produced highly reactive cyclopropenes from 2-aroyl-1-chlorocyclopropanecarboxylates triggered by Cs2CO3 and the subsequent intramolecular aldol reaction under heating conditions, enabling the formation of new C-O and C-C bonds for benzo[b]oxepine ring synthesis. Moreover, at ambient temperature, the above C-O/C-C bond-forming event takes place preferentially via a [4 + 2] annulation path over a spirocyclization route, leading to substituted fused-cyclopropanes with good diastereoselectivities. Gratifyingly, further alterations of the obtained spirobenzo[b]oxepines and tetrahydrocyclopropa[b]chromenes afford fascinating classes of 4H-chromen-4-ones and cyclopenta[c]chromenes, respectively, under metal-free conditions.
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Affiliation(s)
- Meher Prakash
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
| | - Sampak Samanta
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
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2
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Khoshbakhsh Foumani M, Conrad J, Frey W, Beifuss U. Flexible Approach for the Synthesis of Annulated 4 H-Pyrans Based on a Cu(I)-Catalyzed C-Allylation/O-Vinylation Reaction of Cyclic 1-Bromoallyl Tosylates with Cyclic and Acyclic 1,3-Dicarbonyls. J Org Chem 2022; 87:8316-8341. [PMID: 35732059 DOI: 10.1021/acs.joc.1c02997] [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
The Cu(I)-catalyzed reaction between five-, six-, seven-, and eight-membered cyclic 1-bromoallyl tosylates and five- and six-membered cyclic 1,3-dicarbonyls in DMF at 80 °C using Cs2CO3 as a base and 2-picolinic acid as an additive selectively delivers a wide array of bisannulated 4H-pyrans in a single step with yields up to 92%. The transformations are considered to proceed as intermolecular C-allylations/intramolecular O-vinylations. With six-membered cyclic 1-bromoallyl tosylates and acyclic β-ketoesters as substrates, the corresponding 5,6,7,8-tetrahydro-4H-chromene-3-carboxylates are obtained with yields up to 59%.
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Affiliation(s)
- Mehran Khoshbakhsh Foumani
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, Stuttgart D-70599, Germany
| | - Jürgen Conrad
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, Stuttgart D-70599, Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany
| | - Uwe Beifuss
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, Stuttgart D-70599, Germany
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3
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Li Y, Jin X, Liu P, Zhang H, Yu X, Liu Y, Liu B, Yang W. Copper‐Catalyzed Dynamic Kinetic C−P Cross‐Coupling/Cyclization for the Concise Asymmetric Synthesis of Six‐, Seven‐ and Eight‐Membered
P
‐Stereogenic Phosphorus Heterocycles. Angew Chem Int Ed Engl 2022; 61:e202117093. [DOI: 10.1002/anie.202117093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Indexed: 01/03/2023]
Affiliation(s)
- Yanli Li
- College of Pharmacy Linyi University Shuangling Road Linyi 276000 (P.R. of China
| | - Xiao Jin
- College of Pharmacy Linyi University Shuangling Road Linyi 276000 (P.R. of China
| | - Peng Liu
- Guangzhou Institutes of Biomedicine and Health (GIBH) China Academy of Sciences No. 190 Kaiyuan Avenue, Guangzhou Science Park Guangzhou 510530 China
| | - Haijuan Zhang
- College of Pharmacy Linyi University Shuangling Road Linyi 276000 (P.R. of China
| | - Xiuling Yu
- College of Pharmacy Linyi University Shuangling Road Linyi 276000 (P.R. of China
| | - Yanjuan Liu
- College of Pharmacy Linyi University Shuangling Road Linyi 276000 (P.R. of China
| | - Baixue Liu
- College of Pharmacy Linyi University Shuangling Road Linyi 276000 (P.R. of China
| | - Wenqiang Yang
- College of Pharmacy Linyi University Shuangling Road Linyi 276000 (P.R. of China
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4
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Li Y, Jin X, Liu P, Zhang H, Yu X, Liu Y, Liu B, Yang W. Copper‐Catalyzed Dynamic Kinetic C–P Cross‐Coupling/ Cyclization for Concise Asymmetric Synthesis of Six‐, Seven‐ and Eight‐Membered P‐Stereogenic Phosphorus Heterocycles. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yanli Li
- Linyi University College of Pharmacy CHINA
| | - Xiao Jin
- Linyi University College of Pharmacy CHINA
| | - Peng Liu
- Chinese Academy of Sciences Guangzhou Institutes of Biomedicine and Health guangzhou institutes of biomedicine of health CHINA
| | | | - Xiuling Yu
- Linyi University College of Pharmacy CHINA
| | | | - Baixue Liu
- Linyi University College of Pharmacy CHINA
| | - WenQiang Yang
- Linyi University College of Pharmacy ShuangLing Road 276000 Lin Yi CHINA
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5
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Marchese AD, Durant AG, Lautens M. A Modular Approach for the Palladium-Catalyzed Synthesis of Bis-heterocyclic Spirocycles. Org Lett 2021; 24:95-99. [PMID: 34908419 DOI: 10.1021/acs.orglett.1c03682] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A simple and modular approach toward bis-heterocyclic spirocycles using palladium catalysis is reported. The enclosed methodology leverages a Mizoroki-Heck-type reaction to generate a neopentylpalladium species. This species can undergo intramolecular C-H activation on a wide array of (hetero)aryl C-H bonds, generating a variety of [4.4] and [4.5] bis-heterocyclic spirocycles in up to 95% yield. A diverse range of bis-heterocyclic spirocycles were possible, with 24 examples and 18 different combinations of heterocycles were synthesized. Biologically relevant aza-heterocycles such as purine, pyrazole, (benz)imidazole, (aza)indole, and pyridine were readily incorporated into the spirocyclic core. The reaction was readily scalable to 1 mmol using a lower catalyst loading and number of base equivalents, and the product was purified without the use flash column chromatography.
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Affiliation(s)
- Austin D Marchese
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Andrew G Durant
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Mark Lautens
- Department of Chemistry, Davenport Chemical Laboratories, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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6
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Babar K, Zahoor AF, Ahmad S, Akhtar R. Recent synthetic strategies toward the synthesis of spirocyclic compounds comprising six-membered carbocyclic/heterocyclic ring systems. Mol Divers 2021; 25:2487-2532. [PMID: 32696299 DOI: 10.1007/s11030-020-10126-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 07/07/2020] [Indexed: 12/12/2022]
Abstract
Spirocyclic compounds fascinate the synthetic chemists due to their privileged ring system and efficacy in drug discovery. Many natural compounds comprise spirocyclic moiety in their skeleton and are effective in pharmaceutical industry. Over the years, many synthetic methodologies have been established for the construction of spirocyclic compounds. In this review, recent synthetic approaches to accessing various spirocompounds comprising six-membered carbocycles/heterocycles have been summarized.
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Affiliation(s)
- Kashaf Babar
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan.
| | - Sajjad Ahmad
- Department of Chemistry, University of Engineering and Technology, Faisalabad, 38000, Pakistan
| | - Rabia Akhtar
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
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Zhao Q, Tang L, Jiao P. Construction of Spiro Skeletons in 2,2',3,3'-Tetrahydro-1,1'- spirobi[1 H-indene]-7,7'-diol (SPINOL) and Analogues. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202103053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Liu N, Zhu W, Yao J, Yin L, Lu T, Dou X. Catalyst-Controlled Chemodivergent Synthesis of Spirochromans from Diarylideneacetones and Organoboronic Acids. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05577] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Na Liu
- Department of Chemistry and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China
| | - Wanjiang Zhu
- Department of Chemistry and State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 211198, China
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Cai J, Wang ZK, Usman M, Lu ZW, Hu XD, Liu WB. Enantioselective Synthesis of β-Quaternary Carbon-Containing Chromanes and 3,4-Dihydropyrans via Cu-Catalyzed Intramolecular C-O Bond Formation. Org Lett 2019; 21:8852-8856. [PMID: 31642679 DOI: 10.1021/acs.orglett.9b03549] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A copper-catalyzed efficient enantioselective construction of chiral quaternary carbon-containing chromanes and 3,4-dihydropyrans is reported. The desymmetric C-O coupling is enabled by a chiral dimethylcyclohexane-1,2-diamine ligand and provides the desired products in good yields with high enantioselectivities. This method presents a broad substrate scope and is applicable to diversely substituted aryl bromides and alkenyl bromides. The application is demonstrated by a gram-scale synthesis and derivatization of the products toward valuable building blocks.
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Affiliation(s)
- Jinhui Cai
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Zhen-Kai Wang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Muhammad Usman
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Zhi-Wu Lu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Xu-Dong Hu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
| | - Wen-Bo Liu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences , Wuhan University , Wuhan , Hubei 430072 , China
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