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Efficient One‐Step Synthesis of Lactide with High Yield and Selectivity Using Brønsted Acid Catalysis
Summary
Despite its title referencing lactide synthesis, this paper studies a one-step chemical process for producing lactide (a precursor to biodegradable PLA plastic) using an acid catalyst — not microplastic pollution. It examines reaction chemistry and yield optimization, and is not relevant to microplastics or human health.
In this work, a one-step method synthesis of lactide is reported instead of the traditional two-step method. The selection of a suitable acid catalyst polyphosphoric acid and optimization of reaction conditions result in a yield of 97%. Moreover, this new one-step strategy eliminates the need for metal catalysts and does not require high-temperature conditions, thereby avoiding the issue of racemization. The simple one-step strategy offers a combination of efficiency, sustainability, and product quality improvements, making it a modern, practical approach to lactide synthesis.