New acid catalyzed conversion of 2-alkoxy-4,5-benzo-1,3-dioxolanes
β Scribed by O. G. Safiev; D. V. Nazarov; V. V. Zorin; D. L. Rakhmankulov
- Book ID
- 104781983
- Publisher
- Springer US
- Year
- 1988
- Tongue
- English
- Weight
- 82 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0009-3122
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Under the influence of hydrogen peroxide and hydrochloric acid in acetonitrile 4-substituted benzo-2,1,3-thiadiazoles form 5-chloro-4,7-dioxobenzo-2,1,3thiadiazole. 4-Alkoxy-and 4-[(alkoxycarbonyl)methoxy]benzo-2,1,3-thiadiazoles give, in addition, the corresponding 5,7-dichloro derivatives. 5-Chlo
In acid-catalyzed reactions with 3-unsubstituted indoles 1,2-alkoxy-1,3-dioxolanes 2a-c behave as acyl equivalents. Depending on the substitution patterns of the reaction partners, the 1,3-dioxolanium ions 3a-c, generated in situ from the cyclic ortho esters by the action of sulfosalicylic acid, rea