908563-72-4Relevant academic research and scientific papers
Photochemistry of chromones: Photoreorganisation of 3-alkoxy-2-thienyl-4-oxo-4H-1-benzopyrans
Gupta, Satish C.,Sharma, Somesh,Saini, Ashok,Dhawan, Som N.
, p. 2391 - 2395 (1999)
Photoirradiation of a methanolic solution of 3-alkoxy-2-thienyl-4-oxo-4H-1-benzopyrans with Pyrex filtered UV light leads to cyclised and cyclodehydrogenated angular products involving both thiophene and alkoxy groups. The reaction is initiated through H-abstraction. The product distribution depends upon the substituents on the thiophene ring.
Photochemistry of 6-chloro-3-hydroxy-2-(2′-thienyl)-4-oxo-4H-1- benzopyran
Bala, Ritu,Kumar, Rupesh,Yusuf, Mohamad,Bansal
, p. 1440 - 1444 (2008/09/17)
On photolysis of the titled compound around its λmax (360 nm), it rearranges to 6-chloro-3-hydroxy-3-(2′-thienyl)-l,2-indandione as analysed by IR, NMR and by coupling with o-phenylenediamine. Quantitative analysis of the photolysed mixture by spectral measurements also confirms it. Quantum yield of the product is low (0.05), which is not affected by the polarity of the solvent.
