1415033-20-3Relevant academic research and scientific papers
Regiospecific normal Diels-Alder reaction of trans -1,2- biscoumarinylethenes
Sanap, Kailas K.,Samant, Shriniwas D.
, p. 2189 - 2194 (2012)
The reaction of different 7,8-substituted coumarin 4-acetic acids with 7-diethylaminocoumarin-3-carbaldehyde in the presence of piperidine in methanol gives 1,2-biscoumarinylethenes. These compounds undergo regiospecific Diels-Alder reactions at their electron-rich diene components CCCC with electron-deficient dienophiles. The feasibility of normal electron-demand Diels-Alder reactions could be explained on the basis of the HOMO-LUMO gap. All the compounds are new and are intensely colored. Georg Thieme Verlag Stuttgart ? New York.
