Luo, Qianfu published the artcileSynthesis and characteristics of dithienylethenes with purine and pyrimidine substituents, Application of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Dyes and Pigments (2015), 602-608, database is CAplus.
Five new dithienylethenes decorated with purine and pyrimidine derivatives have been conveniently synthesized via a facile one-pot process. All new compounds were characterized by 1H NMR, 13C NMR, UV-visible spectroscopy and high-resolution mass spectrometry. Their photophys. properties and photochromic behavior were investigated in detail. These compounds exhibit reversible photochromism with good photocyclization/photocycloreversion quantum yields and considerable molar extinction coefficients The result shows that the introduction of purine and pyrimidine derivatives into the dithienylethene unit has a remarkable effect on their performance, such as photoinduced fatigue resistance, photocyclization/photocycloreversion quantum yields and molar extinction coefficient
Dyes and Pigments published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, Application of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.
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https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics