One-pot synthesis of pyranocoumarins via microwave-assisted pseudo multicomponent reactions and their molecular switching properties
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Updated: May 24, 2026

Microwave-Assisted Preparation of 1-Aryl-1H-pyrazole-5-amines
Published on: June 23, 2019
Kuan-Ting Li1, Yong-Bo Lin, Ding-Yah Yang
1Department of Chemistry, Tunghai University, No. 181, Section 3, Taichung Port Road, Taichung City 40704, Taiwan, Republic of China.
Abstract:
Two new pyranocoumarins were synthesized via one-pot, microwave-assisted pseudo multicomponent condensations of coumarin and 4-methylquinoline to investigate their molecular switching properties. Both are light-sensitive and have a distinct change of color upon UV irradiation. The reaction can be reverted by treating the photogenerated products with imidazoline-functionalized magnetic nanoparticles, which can be swiftly recycled with an external permanent magnet.
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