Synthesis and reactivity of 1-aryl-9H-thieno[3,4-b]chromon-9-ones

Abstract

Methods were developed for the synthesis of 1-aryl-9H-thieno [3,4-b]chromon-9-ones based on the reaction of bromo and dibromo derivatives of 2-methyl-4H-chromon-4-one with thioacetamide in DMF. The thienochromones were modified and their fluorescence properties were studied. Bis(thienochromones) were synthesized by the reaction of thienochromones with ketoaldehydes.

A New Protocol for Total Synthesis of Natural Product Frutinone A and Its Derivatives

“…According to the references, [15][16][17] the reaction of 2 0 -hydroxyacetophenone derivatives with a series of 2-chlorobenzoyl chloride in pyridine provided 2-acetylphenyl 2-chlorobenzoate derivatives 11 in good-to-excellent yields.…”

Media with photoinduced irreversible fluorescence

“…It has been shown that among the studied polymeric bindings, the use of poly(methyl methacrylate) provides the highest fluorescence intensity. Judging from kinetic data, the fluorescence intensity of the photoproducts increases sharply on going from solution to a polymeric matrix at comparably equal changes of the photoinduced absorbance [31][32][33][34][35].…”

Light‐sensitive organic recording media for 3D optical memory

“…The analysis of spectral-kinetic data for about 100 compounds of this type in solution [16,39,40] showed that absorption and fluorescence characteristics of photofluorescent polymer films depend on the compound structure and polymer nature. Maxima absorption bands for initial compound A and the photoproduct B are changed in the spectral regions 304-326 nm and 390-455 nm, accordingly.…”

“…Thus, this photochromic materials may be used for the development of multilayer photochromic recording media with nondestructive readout of optical information as lightsensitive components of recording media for implementation of the 3D-bitwise working optical memory of the WERM type. 2.3 Photofluorescent materials for bitwise archival optical memory with the fluorescent readout For the development of recording media for 3D bitwise archive optical memory of the WORM type lightsensitive photofluorescent materials appear most promising [32][33][34][35][36][37][38][39][40]. The development of these media is based on the use of organic compounds that have no luminescence in their initial form but form fluorescent photoproducts as a result of the irreversible photochemical reaction.…”