Abstract
Reported herein is a new photocatalytic annulation for the synthesis of 2,3,4,6-tetrasubstituted pyridines with enaminones and N,N,N',N'-tetramethyl ethylenediamine (TMEDA). The photocatalytic reactions take place without requiring a transition metal reagent and provide products with broad scope. The methyl in TMEDA acts as the carbon source in pyridine ring construction, and BrCF2CO2Et plays the role of the terminal oxidant for free radical quenching.
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