The conventional catalytic system used in the hydrogenation process involves the use of a palladium on charcoal (Pd/C) catalyst, in powder form, and hydrogen gas (Scheme S3). It consists of a batch process, which frequently uses solvents such as methanol or ethanol. The catalyst and solvent used in this system can be separated and reused with an almost complete recovery of the substances (only evaporation losses would occur). Additionally, filtration is used to separate Pd/C from the solvent. 6