Continuous Microflow [2 + 2] Photocycloaddition Reactions Using Energy-saving Compact Light Sources

Photocycloaddition of cyclohexenones with vinyl acetates or vinyl ethers, and the Paterno-Büchi reaction were carried out using photomicroreactors in combination with compact light sources such as low-power black lights and UV LEDs. The observed high efficiency holds promise as an energy-saving protocol for photoinduced [2 + 2] cycloaddition reactions.

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