Fig. 1: Catalytic formal C–C bond insertion into aldehydes.
From: Asymmetric formal C–C bond insertion into aldehydes via copper-catalyzed diyne cyclization
a Formal C–C bond insertion into aldehydes via diazo approach. b Our hypothesis: carbonyl ylide enabled formal C–C bond insertion. c This work: formal C–C bond insertion into aldehydes via non-diazo approach.
