Table 2. Utilization of acetylene as a feedstock in photo-redox catalysis ^a .

Entry	Catalyst	Base	Conversion [%]	TEMPO	6a : 7a
1	lr(ppy)2(dtbbpy)PF6	iPr2NEt	94	—	1.8 : 1
2	lr(ppy)2(dtbbpy)PF6	iPr2NEt	93	1 equiv.	3.2 : 1
3 b	lr(ppy) 2 (dtbbpy)PF 6	iPr 2 NEt	97	1 equiv.	3.6 : 1
4	lr(ppy)2(dtbbpy)PF6	iPr2NEt	23	2 equiv.	2.3 : 1
5 c	lr(ppy)2(dtbbpy)PF6	iPr2NEt	< 5	1 equiv.	—

^a2 × 5-psi BPRs were used when setting up the reaction. The conversions and selectivities were based on the ¹⁹F-NMR analysis of the crude reaction mixture. Isolated yields.

^bWith 20-psi BPR.

^cConducted in the batch reactor.