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These uncolored polyaromatic compounds are activated by UV light, at room temperature, and converted through a stilbene\u2010type 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\u2010products, formed after prolonged UV irradiation.<\/jats:p>","DOI":"10.1002\/ejoc.202100114","type":"journal-article","created":{"date-parts":[[2021,2,26]],"date-time":"2021-02-26T22:15:07Z","timestamp":1614377707000},"page":"1979-1988","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Synthesis of Vinylnaphthofurans and NMR Analysis of their Photoswitching"],"prefix":"10.1002","volume":"2021","author":[{"given":"V\u00e2nia","family":"Gra\u00e7a","sequence":"first","affiliation":[{"name":"Centro de Qu\u00edmica \u2013 Vila Real Universidade de Tr\u00e1s-os-Montes e Alto Douro  5001-801 Vila Real Portugal"}]},{"given":"J\u00e9r\u00f4me","family":"Berthet","sequence":"additional","affiliation":[{"name":"Univ Lille INSERM CHU Lille UMR\u2212S 1172 Lille Neuroscience and Cognition Research Center  59000 Lille France"}]},{"given":"C\u00e9u M.","family":"Sousa","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica \u2013 Vila Real Universidade de Tr\u00e1s-os-Montes e Alto Douro  5001-801 Vila Real Portugal"}]},{"given":"Stephanie","family":"Delbaere","sequence":"additional","affiliation":[{"name":"Univ Lille INSERM CHU Lille UMR\u2212S 1172 Lille Neuroscience and Cognition Research Center  59000 Lille France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4328-5694","authenticated-orcid":false,"given":"Paulo J.","family":"Coelho","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica \u2013 Vila Real Universidade de Tr\u00e1s-os-Montes e Alto Douro  5001-801 Vila Real Portugal"}]}],"member":"311","published-online":{"date-parts":[[2021,3,23]]},"reference":[{"key":"e_1_2_7_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/B978-044452176-7\/50004-8"},{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejoc.200390176"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/jo400710r"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.dyepig.2017.02.027"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jphotochem.2019.112155"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1021\/jo500907z"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejoc.201901814"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.dyepig.2020.109110"},{"key":"e_1_2_7_9_1","first-page":"227","volume-title":"Industrial Photochromism","author":"Towns A. 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