Rrapi, Marie; Batsika, Charikleia S; Nikitas, Nikolaos F; Tappin, Nicholas D C; Triandafillidi, Ierasia; Renaud, Philippe; Kokotos, Christoforos G (2024). Photochemical Synthesis of Lactones, Cyclopropanes and ATRAǂ Products: Revealing the Role of Sodium Ascorbate. Chemistry - a European journal, 30(21), e202400253. Wiley-VCH 10.1002/chem.202400253
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Chemistry_A_European_J_-_2024_-_Rrapi_-_Photochemical_Synthesis_of_Lactones__Cyclopropanes_and_ATRA__Products__Revealing.pdf - Accepted Version Restricted to registered users only until 7 February 2025. Available under License Publisher holds Copyright. Download (1MB) |
Light-mediated processes have received significant attention, since they have re-surfaced unconventional reactivity platforms, complementary to conventional polar chemistry. γ-Lactones and cyclopropanes are prevalent moieties, found in numerous natural products and pharmaceuticals. Among various methods for their synthesis, light-mediated protocols are coming to the spotlight, although these are contingent upon the use of photoorgano- or metal-based catalysts. Herein, we introduce a novel photochemical activation of iodo-reagents via the use of cheap sodium ascorbate or ascorbic acid to enable their homolytic scission and addition onto double bonds. The developed protocol was applied successfully to the formal [3+2] cycloaddition for the synthesis of γ-lactones, traditional atom transfer radical addition (ATRA) reactions and the one-pot two-step conversion of alkenes to cyclopropanes. In all cases, the desired products were obtained in good to high yields, while the reaction mechanism was thoroughly investigated. Depending on the nature of the iodo-reagent, a halogen or a hydrogen-bonded complex is formed, which initiates the process.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Tappin, Nicholas David Charles, Renaud, Philippe |
Subjects: |
500 Science > 570 Life sciences; biology 500 Science > 540 Chemistry |
ISSN: |
0947-6539 |
Publisher: |
Wiley-VCH |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
08 Feb 2024 14:34 |
Last Modified: |
13 Apr 2024 00:14 |
Publisher DOI: |
10.1002/chem.202400253 |
PubMed ID: |
38324672 |
Uncontrolled Keywords: |
ATRA Cyclopropanes Halogen Bonding lactones photochemistry |
BORIS DOI: |
10.48350/192663 |
URI: |
https://boris.unibe.ch/id/eprint/192663 |
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