Synthesis, structure, absorption and fluorescence of Pechmann dye heteroanalogues was written by Aysha, Tarek;Lunak, Stanislav Jr.;Lycka, Antonin;Vynuchal, Jan;Elias, Zdenek;Ruzicka, Ales;Padelkova, Zdenka;Hrdina, Radim. And the article was included in Dyes and Pigments in 2013.Synthetic Route of C9H10O3S This article mentions the following:
Three N-analogs of Pechmann dye with identical aryl groups in the 5, 5′-positions (aryl = Ph, 2-naphthyl, 2-thienyl) and carboxy ester groups in the 3,3′-positions were synthesized by oxidative dimerization of the corresponding 5-aryl-pyrrolinone esters. Derivatives with improved solubility in most organic solvents were prepared by subsequent N-methylation. The dyes were confirmed as E isomers, i.e. holding an all-trans 1,6-diaryl-1,3,5-hexatriene backbone, with slight torsion of central CC bond by X-ray diffraction and d. functional theory (DFT) calculations No E/Z photoisomerization was observed Full assignment of 1H and 13C NMR signals was performed. The absorption spectra are quite similar with the maxima in the range 572 nm (aryl = phenyl)-643 nm (aryl = 2-thienyl) in accordance with time dependent DFT calculations of excitation energies. No fluorescence was observed in solution, while all compounds fluoresce in low temperature solvent glass (77 K) and a weak solid-state fluorescence of Ph and 2-naphthyl derivatives in red/IR region was detected. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8Synthetic Route of C9H10O3S).
Ethyl 3-oxo-3-(thiophen-2-yl)propanoate (cas: 13669-10-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Synthetic Route of C9H10O3S
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics