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.
Cited by
3 articles.
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