Table 2.

Reaction Conditions for the Visible Light-Driven C-O Borylation.^a

Entry	Variations from standard conditions	Yield, %
1	none	64 (78b, 83c)
2	no light	0
3	no PTH1	0
4	no Cs2CO3	0
5	with water (1 equiv.), 10 h	63
6	with 18-crown-6 (1 equiv.), 10 h	60
7	K3PO4 instead of Cs2CO3	30
8	2 equiv. B2pin2	52
9	Tolyl triflate instead of 1	37d

^aReaction conditions: see footnote for Table 1.

^bIsolated yield for a reaction in the presence of water (1 equiv.).

^cIsolated yield after 36 h.

^dp-Cresol was also formed in 54% yield.