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Synthesis and highly efficient light-induced rearrangements of diphenylmethylene(2-benzo[b]thienyl)fulgides and fulgimides

2-Benzo[b]thienyl fulgides and fulgimides containing bulky diphenylmethylene substituents were synthesized in the form of their ring-opened E- or Z-isomers. In contrast to the majority of known fulgides/fulgimides, that form colored ring-closed structures under UV irradiation, the obtained compounds...

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Detalles Bibliográficos
Autores principales: Rybalkin, Vladimir P, Zmeeva, Sofiya Yu, Popova, Lidiya L, Tkachev, Valerii V, Utenyshev, Andrey N, Karlutova, Olga Yu, Dubonosov, Alexander D, Bren, Vladimir A, Aldoshin, Sergey M, Minkin, Vladimir I
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7385394/
https://www.ncbi.nlm.nih.gov/pubmed/32765797
http://dx.doi.org/10.3762/bjoc.16.149
Descripción
Sumario:2-Benzo[b]thienyl fulgides and fulgimides containing bulky diphenylmethylene substituents were synthesized in the form of their ring-opened E- or Z-isomers. In contrast to the majority of known fulgides/fulgimides, that form colored ring-closed structures under UV irradiation, the obtained compounds undergo an irreversible transformation leading to decoloration of their solutions. This rearrangement with the formation of the dihydronaphthalene core appeared to be by 2–3 orders of magnitude more efficient than for the known diphenylmethylene(aryl(hetaryl))fulgides. The molecular structures of E- and Z-isomers and of products of the photoinduced rearrangement completed by 1,5-H shift reaction, 3a,4-dihydronaphtho[2,3-c]furans(pyrroles) C, were established based on the data of (1)H and (13)C NMR spectroscopy and X-ray diffraction studies.