反应详情

To a solution of (R)-methyl 2-(1-(tert-butoxycarbonylamino)ethyl)oxazole-4-carboxylate (3.07 g, 11.37 mmol) in THF (25 mL) at 0° C., was added LiBH4 (17.0 mL, 2.0M in THF, 34.0 mmol). The reaction was allowed to warm to room temperature and stirred for 3 h. Ethyl acetate (11 mL) was added drop-wise and stirred for 30 min. The reaction was cooled to 0° C. and 17 mL of 1N HCl was added drop-wise and diluted with 30 mL of water. The mixture was then extracted with ethyl acetate, dried on Na2SO4, concentrated, and chromatographed on silica gel (3% MeOH/97% chloroform) to yield 84% of (R)-tert-butyl 1-(4-(hydroxymethyl)oxazol-2-yl)ethylcarbamate.

1. stirringstirred for 30 min
2. temperatureThe reaction was cooled to 0° C.
3. extractionThe mixture was then extracted with ethyl acetate
4. customdried on Na2SO4
5. concentrationconcentrated
6. customchromatographed on silica gel (3% MeOH/97% chloroform)