反应详情

By using an analogous procedure to that described for Reference Example 13, carbobenzyloxy-L-alanine (2 g, 8.99 mmol), hydroxybenzotriazole (1.2 g, 8.99 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1.72 g, 8.99 mmol), 1-amino-3,3-diethoxypropane (1.25 g, 8.53 mmol) and N,N-diisopropylethylamine (1.56 ml, 8.99 mmol) were reacted in anhydrous tetrahydrofuran (40 ml) at room temperature for 16 h, to provide benzyl (1S)-2-[(3,3-diethoxypropyl)amino]-1-methyl-2-oxoethylcarbamate (2.55 g, 85%) as a pale yellow solid.