2,2-Dimethyl-5-(propan-2-ylidene)-1,3-dioxane-4,6-dione is a derivative of Meldrum's acid, serving as a versatile synthetic intermediate in organic chemistry. It features a reactive exocyclic double bond and active methylene functionality, enabling Knoevenagel condensations, alkylations, and other carbon-carbon bond forming reactions. Commonly used in the synthesis of pharmaceuticals, agrochemicals, and complex natural products, this compound offers high reactivity under mild conditions and good stability, making it suitable for multi-step synthetic sequences requiring precise control.