4-methyl-benzoic acid methyl ester; tetra-n-butylammonium tetrafluoroborate in N,N-dimethyl-formamide T=60°C; 6 h; ElectrolysisInert atmosphere;

hydrogen in ethylene glycol dimethyl ether T=160°C; P=22502.3 Torr; 20 h; Inert atmosphereAutoclaveMolecular sieve;