Synthesis of dimeric butenolide catalyzed by various inorganic silver catalysts

This article describes a method for synthesizing butyrolactone dimers using various inorganic silver salt catalysts. The method was successfully applied to alkyl 2-(2-bromopropyl)malonate 1, providing the dimeric butyrolactone 2 when catalyzed by different silver salt catalysts. This synthesis method not only simplifies the original synthetic route, but also cleverly combines with natural product analogs, providing a strategy for the development of natural product polymer analogs in the future.