Journal
CHEMSUSCHEM
Volume 13, Issue 22, Pages 5934-5944Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202001892
Keywords
C-H activation; hydrogen atom transfer; metal-free processes; phenylglyoxylic acid; photochemistry
Funding
- Hellenic Foundation for Research and Innovation (HFRI) [655, 721]
- State Scholarships Foundation (IKY) [MIS 5033021]
- European Social Fund (ESF)
- Greek National Resources
- State Scholarships Foundation (IKY)
- European Union (European Social Fund-ESF) through the Operational Programme Human Resources Development, Education and Lifelong Learning [MIS-5000432]
- COST Action C-H Activation in organic synthesis (CHAOS) [CA15106]
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C-H functionalization at the alpha-position of heterocycles has become a rapidly growing area of research. Herein, a cheap and efficient photochemical method was developed for the C-H functionalization of heterocycles. Phenylglyoxylic acid (PhCOCOOH) could behave as an alternative to metal-based catalysts and organic dyes and provided a very general and wide array of photochemical C-H alkylation, alkenylation, and alkynylation, as well as C-N bond forming reaction methodologies. This novel, mild, and metal-free protocol was successfully employed in the functionalization of a wide range of C-H bonds, utilizing not only O- or N-heterocycles, but also the less studied S-heterocycles.
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