Table 2.

Representative examples of the α-oxidation of cyclic ketones.

Entry	Substrate	Conditions	Product (Yield)	Reference
1		1.1 eq. o-H2OCC6H4IO, 3 eq. KOH, MeOH, rt, overnight		Moriarty et al. [28]
2		1.1 eq. PhI(OAc)2, 3 eq. KOH, MeOH, 0-5 °C for 1 h and 23-25 °C for 20 h		Moriarty et al. [29]
3		3.0 eq. PhIO, 2.5 eq. p-TsOH.H2O, CH3CN, 60 °C, 3 h		Ueno et al. [30]
4		PhI(OAc)2, p-TsOH grinding, 20 min		Yusubov and Wirth [31]
5		i) 0.33 eq. PhIO, L-proline (10-30 mol %), DMF, rt, 16-24 h; ii) NaBH4, MeOH, 0 °C		Engqvist et al. [32]