Substrate scope of red-light-mediated Barton decarboxylative Giese reaction.

Entry	Reagent		R1	R2	R3	Yield
						7	8
1		6a	CO2Me	H	H	67	20
2		6b	CO2t-Bu	H	H	50	22
3		6c	COCH3	H	H	65	21
4		6d	CN	H	H	55	17
5		6e	CO2H	H	H	78	18
6		6f	CO2NPhth	H	H	ND	13
7		6g	CO2Me	H	Me	35	37
8		6h	CO2Me	Me	H	ND	65
9		6i	CO2Me	CO2Me	H	50a	17
10		6j	CO2Me	CO2Me	H	30a	66
11		6k			H	ND	54
12		6l			H	ND	68

^ad.r. = 5 : 1.