✦ LIBER ✦
An overlooked short entry to 2- alkyliden-1,3-dioxolanes. Highly reactive ketene acetals
✍ Scribed by R. W. M. Aben; J. W. Scheeren
- Book ID
- 104589203
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 173 KB
- Volume
- 109
- Category
- Article
- ISSN
- 0165-0513
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✦ Synopsis
Abstract
2‐Alkyliden‐1,3‐dioxolanes can be prepared surprisingly easily from the corresponding 2‐bromoacetals by dehydrobromination with potassium tert. butoxide. The method has a wide scope and gives access to ketene acetals which cannot be prepared by other methods. The application of mono substituted cyclic ketone acetals in the lewis acid catalyzed stereoselective formation of cis oxetanes from aldehydes is illustrated.