Mechanochemistry has emerged as a transformative approach in this regard significantly advancing greener practices in academia and industry. This method uses mechanical force and friction to drive chemical reactions, often resulting in rapid reaction kinetics and either eliminating the need for solvents entirely or minimizing their use to a bare minimum-a strategy known as liquid-assisted grinding (LAG). Mechanochemistry frequently enables reactions that are highly air and/or moisture sensitive in solution to proceed smoothly under ambient conditions. These features make mechanochemistry an attractive and suitable strategy for modern synthetic chemistry. Despite its potential, solvent-free or LAG Wittig-type reactions are relatively underexplored in the literature (Figure ). Most reports focus on stabilized phosphonium ylides in the Horner-Wadsworth-Emmons (HWE) modification of the Wittig reaction or semi-stabilized ylides from benzyl phosphonium salts. While these reactions are conducted under neat conditions, some protocols still require external heating, such as conventional heating via an oil bath or microwave irradiation, to provide the necessary energy. Reports relying solely on mechanical force to drive the reaction are scarce. In 2018, Mack explored the diastereoselectivity of the Wittig reaction on benzaldehyde under LAG using benzyltriphenylphosphonium bromide. And very recently Friščić reported a hexameric supramolecular cage assembly constructed from (dibromomethyl)triphenylphosphonium bromide units. This assembly can encapsulate small carbonyl compounds and, upon mechanical impact, yield the respective 1,1-dibromoolefins via a base-activated host (PPh₃CHBr₂) -guest (aldehyde/ketone) directed Wittig olefination.