Recyclable heterogeneous metal foil-catalyzed cyclopropenation of alkynes and diazoacetates under solvent-free mechanochemical reaction conditions† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c8sc00443a.

Recyclable heterogeneous metal foil-catalyzed cyclopropenation of alkynes and diazoacetates under solvent-free mechanochemical reaction conditions† †Electronic supplementary information (ESI) available. See DOI: 10.1039/c8sc00443a.