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Towards Designer Photocatalysts: Structure-Property Relationships in 2,6-Diaryl-pyryliums.
Chemistry
November 2024
Department of Chemistry, University of Wisconsin-Platteville, 1 University Plaza, Platteville, WI 53818, USA.
Fully organic photocatalyst systems are highly attractive, not merely because they are transition-metal free, but more importantly due to their unique and often potent reactivity. A detailed understanding of the various redox states, both ground and excited state, and specifically what structural parameters control them is therefore crucial for harnessing the full potential of these systems in organic synthesis. However, unlike their organometallic counterparts, detailed structure-property relationships for organic photocatalysts are largely absent from the literature.
View Article and Find Full Text PDFTransition metal-free photochemical C-F activation for the preparation of difluorinated-oxindole derivatives.
Chem Sci
March 2023
Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
The development of strategies for single and selective C-F bond activation represents an important avenue to overcome limitations in the synthesis of valuable fluorine-containing compounds. The synthetic and medicinal research communities would benefit from new routes that access such relevant molecules in a simple manner. Herein we disclose a straightforward and mechanistically distinct pathway to generate -difluoromethyl radicals and their installation onto -arylmethacrylamides for the preparation of valuable difluorinated oxindole derivatives.
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