反应详情

A solution of lithium borohydride (2M THF, 19.8 mL) was added to a solution of 2-amino-4,4,4-trifluoro-3-trifluoromethyl-butyric acid ethyl ester (5 g, 19.8 mmol), prepared as described (J. Med Chem. 1981, 24, 1043–1047), in THF (80 mL) at 25° C. and was stirred for 4 h. 2M HCl was added to the reaction mixture very carefully until a pH less than 2. The organic solvent was removed in vacuo and the aqueous layer was neutralized with sat NaHCO3 until pH=7. The aqueous layer was extracted with EtOAc (2×50 mL) and the organic extracts were dried over Na2SO4 and concentrated to provide 3,3,3-trifluoro-2-(trifluoromethyl)-1-(hydroxymethyl)propylamine as a yellow oil (3.2 g, 77% yield). The crude oil was of sufficient purity to utilize in the subsequent reaction.

1. customprepared
2. customThe organic solvent was removed in vacuo
3. extractionThe aqueous layer was extracted with EtOAc (2×50 mL)
4. dry with materialthe organic extracts were dried over Na2SO4
5. concentrationconcentrated