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Photocatalyzed Direct α-Alkylation of Esters Using Styrenes
PengzhiWang,AnnaV.Bay,EmeliaJ.Farnam,KarlA.Scheidt
Advanced Synthesis & Catalysis Pub Date : 06/29/2023 00:00:00 , DOI:10.1002/adsc.202300253
Abstract
A mild photocatalyzed approach to achieve the α-alkylation of esters via formation of an α -radical is disclosed here. Cesium enolates of esters were generated in situ using Cs2CO3 as a base. A subsequent photocatalyzed oxidation at the α-carbon of these enolates produced an α-radical that was added into activated alkenes. This is the first example accessing the α-carbon radical of esters in photoredox catalyed transformations.
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