反应详情

温度

40 °C

Similarly to the procedure of Example I-5, 1.20 g (4.54 mmol) of tert-butyl 2-(4-formylphenoxy)-2-methylpropionate (Example I-4) and 0.70 g (4.54 mmol) of methyl DL-2-aminobutyrate are reacted at room temperature with 0.92 g (9.08 mmol) of triethylamine and 1.44 g (6.81 mmol) of sodium triacetoxyborohydride in 10 ml of dichloroethane. A further 0.9 g (4.25 mmol) of sodium triacetoxyborohydride and 0.35 g (2.27 mmol) of methyl DL-2-aminobutyrate are added and the mixture is heated at 40° C. for 3 h, giving 1.47 g (89%) of methyl 2-{[4-(2-tert-butoxy-1,1-dimethyl-2-oxoethoxy)benzyl]amino}butyrate.