Eine neuartige photochemische Umlagerung von Styrylfuranen

Ho, Tong‐Ing; Wu, Jin‐Yi; Wang, Shunli

doi:10.1002/(sici)1521-3757(19990903)111:17<2753::aid-ange2753>3.0.co;2-8

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Synthesis of Vinylnaphthofurans and NMR Analysis of their Photoswitching

et al. 2021

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An easy synthesis of photochromic vinylnaphthofurans by the acid-catalyzed one-pot reaction of naphthols with but-2-yne-1,4-diols is described. These uncolored polyaromatic compounds are activated by UV light, at room temperature, and converted through a stilbene-type electrocyclization into a thermally stable orange species, which can be switched back using visible light. The behavior of these photoswitches was elucidated using NMR, which allowed to identify the photoisomers and some side-products, formed after prolonged UV irradiation.

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