反应详情

A mixture of BOC-alanine-thioamide (1.39 g, 6.81 mmoles), chloroacetone (0.65 mL, 8.18 mmoles) and calcium carbonate (1.0 g, 10.22 mmoles) were refluxed in ethanol (25 mL) for 4 h. The reaction was cooled to room temperature and quenched with 2OmL of saturated aq. NaHCO3 solution. Ethanol was evaporated under reduced pressure and extracted with ethyl acetate (2×30 mL). The combined organic layers was dried over Na2SO4 and concentrated. The residue was chromatographed on silica gel (20% ethyl acetate/80% hexane) to yield 48% of the desired product.

1. customquenched with 2OmL of saturated aq. NaHCO3 solution
2. customEthanol was evaporated under reduced pressure
3. extractionextracted with ethyl acetate (2×30 mL)
4. dry with materialThe combined organic layers was dried over Na2SO4
5. concentrationconcentrated
6. customThe residue was chromatographed on silica gel (20% ethyl acetate/80% hexane)