Acetic Anhydride → HCID 178472001, 화합물

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A stirred solution of ethyl (2,3,4,5-tetrafluorobenzoyl)acetate (3.73 g, 14.1 mmol), Ac2O (8.50 mL, 85.7 mmol) and triethyl orthoformate (4.70 mL, 28.2 mmol) was heated at 120° C. for 3 h. The mixture was concentrated in vacuo and dried under high vacuum. To the mixture of the residue in anhydrous toluene (50 mL) was added 3-amino-3-methyl-1-butanol (1.45 g, 14.1 mmol) in anhydrous toluene (20 mL) very slowly at 0° C. and stirred at room temperature for 2 h. The solvent was removed by evaporation. Flash chromatography (EtOAc:Hexane=1:1) of the residue gave ethyl 2-(2,3,4,5-tetrafluorobenzoyl)-3-[(1-hydroxy-3-methylbutane-3-yl)amino]acrylate as a colorless solid (3.91 g, 73%).

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