期刊
TETRAHEDRON
卷 75, 期 19, 页码 2832-2842出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2019.04.007
关键词
Vilsmeier-Haack reagent; Rearrangement; Heterocyclic dye; Stokes shift; Crystal structure
资金
- Laboratory of Magnetic Tomography and Spectroscopy of Chemical Department of Moscow State University
- Russian Science Foundation [18-73-10131]
- NAS of Ukraine [0117U001281]
- Russian Science Foundation [18-73-10131] Funding Source: Russian Science Foundation
Derivatives of 1,3-naphthoxazines containing from five to seven-membered Spiro ring - under Vilsmeier -Haack reaction conditions are rearranged into novel xanthene-type compounds. All synthesized ami-nochromene derivatives fluoresce in organic solvents with extra large Stokes shifts (100-133 nm). It was found that compounds containing five-membered annulated aliphatic rings in methanol solution have the best spectral characteristics. These compounds have moderate quantum yields of 2836-28.94%, and extra large Stokes shifts 106 and 115 nm. (C) 2019 Elsevier Ltd. All rights reserved.
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