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. 2026 Jan 6;6(3):303–313. doi: 10.1021/acsorginorgau.5c00111

2. Optimization of the [2 + 2] Cycloaddition of 5a Using PQ as Photocatalyst under Visible Light Irradiation.

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entry alteration yield (%)
1 none 78
2 10 mol%, 6 h 60
3 DMF 76
4 DMSO 69
5 Ru(bpy)3Cl2 instead of PQ 74
6 air instead of argon --
7 no light --
8 no photocatalyst --
a

Isolated yield.