Visible Light and Aqueous Ethanol Synergy: An Efficient One-Pot Route for the Synthesis of Spiropyran Derivatives

摘要

In this work, we disclose a convenient and eco-friendly proto- col for the synthesis of spiropyran derivatives by one-pot three- component reaction of ninhydrin, active methylene com- pounds and 1,3-dicarbonyl using Compact fluorescent lamp as a source of light in the absence of any additional catalyst. In view of the various advantages this strategy gives an efficient and straightforward pathway to construct spiropyrans in an eco-friendly fashion.