50402-83-0Relevant articles and documents
Regiospecific inverse electron demand Diels-Alder reactions of 7-methylcoumarin-4-azadienes
Sanap, Kailas K.,Samant, Shriniwas D.
, p. 36696 - 36706 (2015)
Condensation of 7-methylcoumarin-4-carbaldehyde with different anilines affords 7-methylcoumarin-4-azadienes. The 7-methylcoumarin-4-azadienes do not undergo normal electron demand Diels-Alder reaction with N-phenylmaleimide, but react with dihydropyran, dihydrofuran, and styrene via inverse electron demand Diels-Alder reaction in the presence of anhydrous ZnCl2. The diene involves the azomethine group and the aniline ring. The product is a mixture of two diastereomers in which the major diastereomer has all the hydrogens at the ring junction in cis configuration. This journal is
Synthesis and photophysical study of novel coumarin based styryl dyes
Sanap, Anita K.,Sanap, Kailas K.,Shankarling, Ganapati S.
, p. 190 - 199 (2015/05/13)
New organic dyes comprising phenothiazine, carbazole, indole, diphenylamine moieties, as the electron donors, and coumarin ring as the electron acceptor through ethylenic π bridge were synthesized and characterized. The reaction of different coumarin-4-acetic acids with phenothiazine-3-carbaldehyde in the presence of piperidine in methanol gives highly fluorescent styryl derivatives having cis configuration of ethylenic double bond. Under similar conditions 7-methylcoumarin-4-acetic acid was condensed with indole-3-carbaldehyde, carbazole-3-carbaldehyde, and diphenyl amine aldehyde to give different styryl derivatives with trans configuration of ethylenic double bond. Synthesized compounds were also studied for photophysical properties and show solvatochromism.
Facile intramolecular Diels-Alder reaction of 4-(o-propargyloxy) styrylcoumarins leading to highly fluorescent coumarin-containing polycyclic compounds
Khatri, Adil I.,Samant, Shriniwas D.
, p. 2362 - 2365 (2014/05/06)
The 4-(o-propargyloxy)styrylcoumarins are prepared by the condensation of O-propargylated salicylaldehyde with substituted coumarin-4-acetic acids. The intramolecular Diels-Alder reaction of 4-(o-propargyloxy)styrylcoumarins, without any catalyst gives fu