反应详情

15.40 g (0.1 mol) of phenacyl chloride and 8.66 g (0.107 mol) of dry sodium thiocyanate in ethanol (200 ml) were stirred for 3 h at 50° C. The solution of 19.51 g (0.1 mol) of (S)-tyrosine methyl ester in ethanol (100 ml) was added in one portion and the reaction mixture was stirred for 12 h. After removing ethanol by distillation, water and ethyl acetate were added. Aqueous phase was extracted twice with ethyl acetate, combined organic phases were dried over sodium sulfate, and the solvent was evaporated. The product was purified by chromatography. The yield was 20.54 g (58%). MS (ES) 354 (M+, 100%)

1. customAfter removing ethanol
2. distillationby distillation, water and ethyl acetate
3. additionwere added
4. extractionAqueous phase was extracted twice with ethyl acetate
5. dry with materialwere dried over sodium sulfate
6. customthe solvent was evaporated
7. customThe product was purified by chromatography