反应详情

To a solution of (2S)-methyl-1-(N-t-butylcarbamoyl)azetidine-2-carboxylate from Reference Example 5 (211.6 mg, 0.99 mmol) in methanol (5.0 mL) was added 1N LiOH in water (1.8 mL) at about 0° C. The mixture was warmed to about room temperature and stirred under argon overnight. The pH was adjusted to about pH 1 by adding 1N HCl and then the mixture was diluted with water and extracted with ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated to give 211.3 mg (85% yield) of the product as a yellow oil. 1H NMR (CDCl3) δ 1.38 (s, 9H); 2.34-2.46 (m, 1H); 2.61-2.74 (m, 1H) 3.71-3.88 (m, 2H); 4.18-4.26 (br, 1H); 4.82 (t, 1H, J=8.6).

1. customat about 0° C
2. temperatureThe mixture was warmed to about room temperature
3. extractionextracted with ethyl acetate
4. dry with materialThe organic layer was dried over magnesium sulfate
5. concentrationconcentrated