58113-18-1Relevant academic research and scientific papers
One-Pot Allylation-Intramolecular Vinylogous Michael Addition-Isomerization Cascade of o-Hydroxycinnamates and Congeners: Synthesis of Substituted Benzofuran Derivatives
Harish, Battu,Subbireddy, Manyam,Obulesu, Owk,Suresh, Surisetti
, (2019)
A unique intramolecular vinylogous Michael addition leading to the synthesis of heterocycles has been disclosed. Base-promoted one-pot sequential O-allylation of o-hydroxy-cinnamates or -cinnamonitrile or -chalcones with γ-bromocrotonates followed by an intramolecular conjugate addition of vinylogous Michael donors resulted in the formation of highly substituted benzofuran derivatives in good to excellent yields. The intramolecular event followed by two [1,3]-H shifts leading to aromatization appears to be the key to the success of this unprecedented transformation.
Photochromic Properties of 2-Hydroxychalcones
Matsushima, Ryoka,Miyakawa, Katsuhide,Nishihata, Minoru
, p. 1915 - 1916 (2007/10/02)
Photochemical and thermal interconversions between 2-hydroxychalcones (λmax 330-360 nm) and flavylium ions (400-460 nm) have been studied in dilute aqueous ethanol solutions.The reactions were fairly clean and recyclizable, though varied with substituents and pH.The quantum yields for photochemical coloration were about 0.1 or less.
