Synthesis of dihydropyrano[2,3-c]pyrazole scaffolds by methylene blue (MB+) as a photo-redox catalyst via a single-electron transfer (SET)/energy transfer (EnT) pathway

• Main Authors: Mohamadpour, Farzaneh, Kamyab, Hesam, Chelliapan, Shreeshivadasan, Amani, Ali Mohammad
• Format: Article
• Language: English
• Published: Elsevier B.V. 2023
• Subjects: T Technology (General)
• Online Access: http://eprints.utm.my/106470/1/ShreeshivadasanChelliapan2023_SynthesisOfDihydropyrano23CPyrazoleScaffolds.pdf; http://eprints.utm.my/106470/; http://dx.doi.org/10.1016/j.crgsc.2023.100381

A new environmentally friendly plan was created to make dihydropyrano [2,3-c]pyrazole structures without using metals. This plan involves combining ethyl acetoacetate, hydrazine hydrate, aldehyde derivatives, and malononitrile in a radical tandem Knoevenagel-Michael cyclocondensation reaction. We us...