Formation of 3-(1,3-dinyl)-4-(2-ynyl)-substituted pyridines in reactions of 1-lithio-1,3-diynes with benzonitrile
β Scribed by I. A. Balova; S. N. Morozkina
- Publisher
- Springer US
- Year
- 2000
- Tongue
- English
- Weight
- 101 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0009-3122
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π SIMILAR VOLUMES
The lithium derivatives (I) of 1,3-dithianes, which have established their value as nucleophilic acylating agents, react with a variety of alkyl halides and carbonyl compounds.
On irradiation (350 nm) in the presence of 2,3-dimethylbuta-1,3-diene (8), 4-(alk-1-ynyl)coumarins 1 afford mixtures of cyclobuta-and cycloocta-annulated products 9 and 10, respectively. In contrast, the corresponding thiocoumarins 2 react with the same diene chemoselectively to give cyclohexa-annul
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