Novel condensation products of 3-Hydroxy-2,2-dimethylpropionaldehyde with malonic acid
- 1 January 1974
- journal article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 27 (11) , 2519-2524
- https://doi.org/10.1071/ch9742519
Abstract
Reaction of 3-hydroxy-2,2-dimethylpropionaldehyde and malonic acid in acetic anhydride-acetic acid yields 4,4-dimethylpent-2-en-5-olide, corresponding to the normal product of condensation of one molecule of aldehyde and one molecule of malonic acid, along with two novel related δ-lactones derived from two molecules of aldehyde and one molecule of malonic acid: one is a saturated lactone having a hydroxy-gem- dimethyltetrahydropyran ring fused across the 2,3-bond of the above normal product, and the other is the corresponding unsaturated fused dihydropyranolactone.Keywords
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