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Substituted diether diols by ring-opening of carbocyclic and stannylene acetals
✍ Scribed by Rolando Martínez-Bernhardt; Peter P. Castro; Gayane Godjoian; Carlos G. Gutiérrez
- Book ID
- 104208746
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 854 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0040-4020
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Three unsubstituted cyclic ketene acetals (CKAs), 2-methylene-1,3-dioxolane, 1a, 2-methylene-1,3-dioxane, 2a, and 2-methylene-1,3-dioxepane, 3a, undergo exclusive 1,2addition polymerization at low temperatures, and only poly(CKAs) are obtained. At higher temperatures, ring-opening polymerization (RO
Diethylaluminium cyanide is a highly selective reagent for the ring opening of 2,3-epoxyalcohols under mild conditions; the reaction takes place at C-3, with inversion of configuration, to give 1-cyano-2,3-diols.