Hydrochloric Acid → 1-[6-Ethylsulfanyl-5-[(3-fluorophenyl)-methyl-carbamoyl]-4-methyl-pyridin-2-yl]-piperidine-4-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A solution of 146 mg (0.32 mmol) 1-[6-Ethylsulfanyl-5-[(3-fluorophenyl)-methyl-carbamoyl]-4-methyl-pyridin-2-yl]-piperidine-4-carboxylic acid methyl ester (example 13) in a MeOH/THF mixture (1:1 v/v, 2 ml) was treated with 1 ml (2.0 mmol) 2M aq. LiOH sol. and heated to 70° C. for 16 h. Subsequently pH 3-4 was adjusted with a 2M aq. HCl sol., followed by extraction with EtOAc. The organic layer was washed with brine, dried over MgSO4 and concentrated in vacuo. As residue 112 mg (0.26 mmol, 79%) 1-[6-Ethylsulfanyl-5-[(3-fluorophenyl)-methyl-carbamoyl]-4-methyl-pyridin-2-yl]-piperidine-4-carboxylic acid (example 14) were obtained. [M+H]+432.2.

Provenance & Evidence