“…Transitioning to more benign or recyclable solvents can therefore potentially yield significant benefits from a sustainability standpoint. Mechanochemical milling − and other neat techniques for alcohol oxidations, , Claisen condensations, amine reductions, Cannizzaro, , Wittig, , Baeyer-Villager and Ullman reactions have been adapted to teaching laboratories in order to demonstrate the possibility of removing solvents from organic transformations. If a solvent is indeed necessary for a particular transformation, popular clean solvents such as water, ionic liquids, or CO 2 have become quite commonplace in the chemical education community. ,,− …”