Substrate scope of various coupling partners with α-ketoalkylsilyl peroxide 1a^a.

Entry	Coupling partner (F–H)	Product	Yieldb (%)
1			91
2			9 (78)c
3			19 (56)c,d,e
4			<5f (66)d,g,h,i
5			0 (43)d,g,h,j
6			<5h (34)d,g,h

^aUnless otherwise specified, the reactions were carried out in the presence of 1a (0.4 mmol), coupling partner (0.2 mmol), Fe(acac)₃ (0.04 mmol), 1,10-phen (0.04 mmol) in DMSO (1 mL) at 40 °C for 4 h under argon atmosphere.

^bIsolated yield.

^cIn DMF.

^d1,10-Phen ligand was not used.

^eUse of 14 (5 equiv.) at 80 °C for 24 h.

^fNMR yield using nitromethane as an internal standard.

^gFeSO₄·7H₂O was used instead of Fe(acac)₃.

^hIn DMF at 80 °C.

ⁱUse of 1a (0.2 mmol) and 16 (3.0 equiv.).

^jUse of 1a (0.2 mmol) and 18 (2.0 equiv.).