Fig. 8: Control experiments.
From: Visible-light photoredox-catalyzed umpolung carboxylation of carbonyl compounds with CO2
Isolated yields are shown. a Investigation of the possibility with sily enol ether 1A as intermediate. b Investigation of the effect of radical scavenger in the reaction. c Investigation of the effect of D2O in the reaction. aKOtBu (1.0 equiv) was used.
