Advancements in the recycling of organocatalysts: From classical to alternative approaches

Homogenous catalysis is a fundamental tool in chemistry and holds a key role to build a sustainable future. This review covers a range of different approaches that have been devised, in the past couple of years, to recycle and reuse the homogenous catalysts, to improve the environmental and economic footprint. The organic catalysts have been supported on organic, inorganic and magnetic matrixes, to allow easy separation and recycle. Additional ingenious solutions have been designed; researchers exploited supramolecular interactions, change of phase, pH, temperature or membranes to address some of the issues that arise with heterogenous catalysis and to facilitate the recovery process.