From ball-milling to bead-milling technology: Short time optimization and scale-up of a one-pot Wittig olefination-Diels-Alder reaction sequence using an agitator bead mill

Mechanochemical methods offer a sustainable alternative to traditional solution-based synthesis, yet their scalability beyond laboratoryscale ball mills remains a challenge and can require lengthy re-optimization to larger scales. Herein, we report the rapid batch translation of a one-pot Wittig olefination-Diels-Alder reaction sequence from a ball mill to an agitator bead mill (DYNO®-MILL RESEARCH LAB), achieving a 100-fold scale-up. Crucially, this translation was accomplished with minimal on-the-fly optimzation, requiring only a few beadmilling runs to indentify suitable operating conditions and perform the transformation in batch mode with good efficiency. Our results provide a practical case study for the scalability of mechanochemical reactions by using bead-milling technology and highlight the potential of bead-milling devices for future process development.