反应详情

2-Acetylthiomethyl-3-phenylpropanoic acid is reacted with oxalyl chloride and the resulting acid chloride is then reacted with 4-aminobutanoic acid, methyl ester, hydrochloride in the presence of diisopropylethylamine as more fully described in Example 2 of European Patent Application 136,883 to give (±)-4-[[2-[(acetylthio)methyl]-1-oxo-3-phenylpropyl]amino]butanoic acid, methyl ester.