Photochromic dihetarylethenes 3. Synthesis and photochromic properties of 1,2-bis[2-methyl-5-(benzoxazol-2-yl)thien-3-yl]hexafluorocyclopentene was written by Krayushkin, M. M.;Stoyanovich, F. M.;Zolotarskaya, O. Yu.;Martynkin, A. Yu.;Ivanov, V. L.;Uzhinov, B. M.. And the article was included in Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya) in 1999.Application of 29421-99-6 This article mentions the following:
The title compound, i.e., 2,2′-[(3,3,4,4,5,5-hexafluoro-1-cyclopentene-1,2-diyl)di-(2-methyl-3,5-thiophenediyl)]bis[benzoxazole] was prepared and its photochromic properties were studied. The compound thus prepared did not exhibit fluorescent properties in either open or cyclic form. In the experiment, the researchers used many compounds, for example, 4-Bromo-5-methylthiophene-2-carboxylic acid (cas: 29421-99-6Application of 29421-99-6).
4-Bromo-5-methylthiophene-2-carboxylic acid (cas: 29421-99-6) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Application of 29421-99-6
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary