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Photochemical diastereoselective synthesis and spectral characterization of (E)-3-(2-benzoylstyryl)-4H-chromen-4-ones. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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Sosnovskikh VY. Synthesis and Reactivity of Electron-Deficient 3-Vinylchromones. SYNOPEN 2021. [DOI: 10.1055/a-1589-9556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
AbstractThe reported methods and data for the synthesis and reactivity of electron-deficient 3-vinylchromones containing electron-withdrawing groups at the exo-cyclic double bond are summarized and systematized for the first time. The main methods for obtaining these compounds are Knoevenagel condensation, Wittig reaction, and palladium-catalyzed cross-couplings. The most important chemical properties are transformations under the action of mono- and dinucleophiles, ambiphilic cyclizations, and cycloaddition reactions. The cross-conjugated and polyelectrophilic dienone system in 3-vinylchromones provides their high reactivity and makes these compounds valuable building blocks for the preparation of more complex heterocyclic systems. Chemical transformations of 3-vinylchromones usually begin with an attack of the C-2 atom and are accompanied by the opening of the pyrone ring followed by recyclization, in which the carbonyl group of chromone, an exo-double bond or a substituent on it can take part. The mechanisms of the reactions are discussed, the conditions for their implementation are described, and the yields of the resulting products are given. This review focuses on an analysis and generalization of the knowledge that has accumulated on the chemistry of electron-deficient 3-vinylchromones, mostly over the past 15 years.1 Introduction2 Synthesis of 3-Vinylchromones3 Reactions with Mononucleophiles4 Reactions with Dinucleophiles5 Ambiphilic Cyclization6 Cycloaddition Reactions7 Other Reactions8 Conclusion
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Banerjee M, Panjikar PC, Bhutia ZT, Bhosle AA, Chatterjee A. Micellar nanoreactors for organic transformations with a focus on “dehydration” reactions in water: A decade update. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Wu L, Yu B, Li E. Recent Advances in Organocatalyst‐Mediated Benzannulation Reactions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000608] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lulu Wu
- School of Science Henan Agricultural University Zhengzhou 450002 People's Republic of China
| | - Bing Yu
- College of Chemistry Green Catalysis Center Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Er‐Qing Li
- College of Chemistry Green Catalysis Center Zhengzhou University Zhengzhou 450001 People's Republic of China
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Poudel TN, Tamargo RJI, Cai H, Lee YR. Recent Progress in Transition-Metal-Free, Base-Mediated Benzannulation Reactions for the Synthesis of a Diverse Range of Aromatic and Heteroaromatic Compounds. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800080] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Tej Narayan Poudel
- School of Chemical Engineering; Yeungnam University; 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of Korea
| | | | - Hongyun Cai
- School of Chemical Engineering; Yeungnam University; 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering; Yeungnam University; 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of Korea
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