Photocatalytic aerobic oxidative hydroxylation of 4-methoxyphenylboronic acid^a.

Ent.	DMF	[5]b	t (h)	C. E.c	6d (%)	6e (%)
1	0.1 mL	0.70	36	—	nr	—
2	0.5 mL	0.14	36	—	nr	—
3	1.0 mL	0.07	36	—	45	40
4	1.5 mL	0.04	36	—	48	41
5	1.0 mL	0.07	72	—	94	88
6	1.0 mL	0.07	72	MLGf	nr	—
7	1.0 mL	0.07	72	MLG1dg	nr	—
8	1.0 mL	0.07	72	No MLG-Ru	nr	—
9	1.0 mL	0.07	72	Inert atm.	nr	—
10	1.0 mL	0.07	72	No DIPEA	nr	—
11	1.0 mL	0.07	72	Blue light	nr	—
12	1.0 mL	0.07	72	Darkness	nr	—
13	1.0 mLh	0.07	72	—	95	88

^aA mass of 20 mg of MLG-Ru, in DMF, 5 (0.07 mmol), DIPEA (0.14 mmol), white LED light (14 W), and air atmosphere at room temperature. nr = no reaction.

^bIn mol L⁻¹.

^cC. E. = control experiments.

^dConversions determined from analysis of crude ¹H NMR spectra.

^eIsolated yield after flash chromatography.

^fMLG was used instead of MLG-Ru.

^gMLG-1d was used instead of MLG-Ru.

^hRecovered MLG-Ru from entry 5 was reused in a new reaction.