[ClH:1].[NH2:2][CH:3]([CH2:7][C:8]([F:11])([F:10])[F:9])[C:4]([OH:6])=[O:5].Cl.[CH3:13]O>>[ClH:1].[NH2:2][CH:3]([CH2:7][C:8]([F:11])([F:10])[F:9])[C:4]([O:6][CH3:13])=[O:5]1.186 g (6.127 mmol) of 2-amino-4,4,4-trifluorobutanoic acid hydrochloride (1:1) were initially charged in 11.6 ml of methanol which had been saturated with hydrogen chloride, and the mixture was stirred under reflux for 4 h. The reaction solution was concentrated and dried under high vacuum. This gave 1.275 g of the target compound (100% of theory).
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