p-Toluenesulfonic acid → HCID 86625768, compound

Participants

Reaction Steps

(RS)-2-[(2-Hydroxy-phenylcarbamoyl)-methyl]-piperidine-1-carboxylic acid tert butyl ester (1.25 g), 4-toluenesulphonic acid (0.07 g) and 4-N,N-dimethylaminopyridine (0.023 g) were combined in 1,3-dichlorobenzene (30 ml) and the mixture boiled for 48 h. The mixture was diluted with dichloromethane and washed with water. The organic phase was dried (MgSO4) and solvent removed at reduced pressure. The residue was column chromatographed (silica gel, 0→1% methanol in dichloromethane) to give the title compound (0.50 g)

Provenance & Evidence