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DOI: 10.1055/a-1300-3453
Investigations on the 1,2-Hydrogen Atom Transfer Reactivity of Alkoxyl Radicals under Visible-Light-Induced Reaction Conditions
Financial support was provided by the National Natural Science Foundation of China (91753126, 21622207) and Strategic Priority Research Program of the Chinese Academy of Sciences (XDB20020200).
Published as part of the Cluster Radicals – by Young Chinese Organic Chemists
Abstract
The alkoxyl radicals have demonstrated superior hydrogen atom transfer reactivity in organic synthesis due to the strong oxygen–hydrogen bond dissociation energy. However, only the intermolecular hydrogen atom transfer (HAT) and intramolecular 1,5-HAT have been widely studied and synthetically utilized for C(sp3)–H functionalization. This Account summarizes our investigations on the unusual 1,2-HAT reactivity of alkoxyl radicals under visible-light-induced reaction conditions for the α-C–H functionalization. Various mechanistic investigations were discussed in this Account to address three key questions to validate the 1,2-HAT reactivity of alkoxyl radicals.
1 Introduction
2 Could Aldehydes/Ketones Be the Sole Reaction Intermediate for the α-C–H Allylation? NO
3 Is the Alkoxyl Radical Absolutely Involved in the Reaction? YES
4 Does the 1,2-HAT of Alkoxyl Radicals Irrefutably Exist? YES
5 Conclusion
Key words
alkoxyl radical - 1,2-HAT - C–H functionalization - photoredox catalysis - N-alkoxylphthalimide - N-alkoxylpyridinium saltSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/a-1300-3453.
- Supporting Information
Publikationsverlauf
Eingereicht: 18. September 2020
Angenommen nach Revision: 29. Oktober 2020
Accepted Manuscript online:
29. Oktober 2020
Artikel online veröffentlicht:
02. Dezember 2020
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