The reactions of electron-deficient 1Н-benzo[f]chromenes with 2,3-dimethylbenzothiazol-3-ium iodide
The action of 2,3-dimethylbenzothiazol-3-ium iodide on 1H-benzo[f]chromenes containing an acceptor substituent in the β-position to the oxygen atom in the presence of triethylamine results in the opening of the pyran ring and the formation of [(2E,4Z)-4-(3-methyl-benzothiazol-2(3H)-ylidene)but-2-en-...
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| Главные авторы: | , |
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| Formato: | Статья |
| Idioma: | English |
| Publicado: |
2023
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| Темы: | |
| Acceso en liña: | https://dspace.ncfu.ru/handle/20.500.12258/22265 |
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| Краткое описание: | The action of 2,3-dimethylbenzothiazol-3-ium iodide on 1H-benzo[f]chromenes containing an acceptor substituent in the β-position to the oxygen atom in the presence of triethylamine results in the opening of the pyran ring and the formation of [(2E,4Z)-4-(3-methyl-benzothiazol-2(3H)-ylidene)but-2-en-1-yl]naphthalen-2-ols. In the case of 1-aryl-2-nitro-1H-benzo[f]chromenes, 3-methyl-2-[(1E,3Z)-3-(3-methylbenzothiazol-2(3H)-ylidene)prop-1-en-1-yl]benzothiazol-3-ium iodide was isolated. The resulting compounds containing the
merocyanine chromophore are of interest as dyes and fluorescent labels. |
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