Table 1.

Optimization of Reaction Conditions

entry	x equiv	oxidant	additive	yield, %
1	1	none	none	39[a]
2	0.5	O2	none	51[a]
3	0.25	NMO	K2CO3	44[a]
4	0.25	NMO	Ag2CO3 0.25 equiv	74[b]
5	0.1	NMO	Ag2CO3 0.13 equiv	87[b]
6	0.05	NMO	Ag2CO3 0.075 equiv	80[a]
7	0	NMO	Ag2CO3 0.125 equiv	<2

^[a]Yield determined by ¹H NMR of crude reaction mixtures.

^[b]Isolated yield.