Purple‑light‑induced Synthesis of Spiro-Oxindole Oximes from BCBs and TBN via Strain Release

Key Points

• The study aims to develop a new method for synthesizing spiro-oxindole oximes using visible light without a photocatalyst.
• Utilized a visible-light-driven reaction
• Involved bicyclo[1.1.0]butane (BCBs) and o-iodoanilides
• Employed tert-butyl nitrite (TBN) as a reagent
• Successfully synthesized spiro-oxindole oximes under visible light
• Demonstrated the dual role of TBN in the reaction
• Achieved the transformation without the use of a photocatalyst