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. Author manuscript; available in PMC: 2024 May 18.
Published in final edited form as: Chem Catal. 2023 Apr 19;3(5):100608. doi: 10.1016/j.checat.2023.100608

Table 1.

Optimization of Reaction Conditions

graphic file with name nihms-1888115-t0002.jpg
entry PC metal source ligand 4 /%a 5 /%a
1 [Ir1] CuCN (30 mol %) ‐ < 5 < 5
2 [Ir1] CuCN (30 mol %) Phen (40 mol %) 39 59
3 [Ir1] CuCN (30 mol %) Phen (40 mol %) 28 45
4 [Ir1] Pd(OAc)2 (10 mol %) ‐ < 5 0
5 [Ir1] Ni(dme)Br2 (20 mol %) ‐ 21 < 5
6 [Ir1] Ni(dMeObpy)Br2 (20 mol %) ‐ 51 < 5
7 [Ir1] Ni(dtbbpy)Br2 (20 mol %) ‐ 56 < 5
8 [Ir2] Ni(dtbbpy)Br2 (20 mol %) ‐ 62 < 5
9 4CZIPN Ni(dtbbpy)Br2 (20 mol %) ‐ 21 < 5
10b [Ir2] Ni(dtbbpy)Br2 (20 mol %) ‐ 78 < 5
11 [Ir2] ‐ ‐ 0 0
12 ‐ Ni(dtbbpy)Br2 (20 mol %) ‐ 0 0
13c [Ir2] Ni(dtbbpy)Br2 (20 mol %) ‐ 0 0
graphic file with name nihms-1888115-t0003.jpg

Standard condition: 1 (0.1 mmol, 1 equiv), 2 (0.15 mmol, 1.5 equiv), 3 (0.3 mmol, 3 equiv), [PC] (0.002 mmol, 2 mol %), metal and ligand as described in DMA (0.1 M) under 50 W 456 nm LED irradiation for 8 h at rt.

a

1H NMR yield using 1,3,5-trimethoxybenzene as an internal standard.

b

The reaction was run at 0.05 M.

c

The reaction was run in the absence of light. PC = photocatalyst; Phen = 1,10-phenanthroline; dme = ethylene glycol dimethyl ether; dMeObpy = 4,4′ -dimethoxy-2,2′ -dipyridyl; dtbbpy = 4,4′ -di-tert-butyl-2,2′ -dipyridyl.