反应详情

To 2-amino-acetamide hydrochloride (Compound 31, 10.0 g, 90.5 mmol), a 10% aqueous solution of sodium carbonate (600 ml) and acetone (250 ml) were added; next, under ice cooling, a solution of N-(9-fluorenylmethoxycarbonyloxy)succinimide (30.5 mg, 90.5 mmol) in acetone (250 ml) was added drop by drop. After stirring at room temperature for 1 hour, the mixture was concentrated under reduced pressure; the residue obtained was dissolved in ethyl acetate, the organic phase was sequentially washed with a 2N aqueous solution of citric acid, aqueous sodium hydrogen carbonate and saturated brine, after which it was dried with magnesium sulfate. The solid was filtered and concentrated under reduced pressure, after which crystallization from methanol was conducted to yield the desired 2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-acetamide (Compound 32; 27.7 g, quant).

1. concentrationthe mixture was concentrated under reduced pressure
2. customthe residue obtained
3. washthe organic phase was sequentially washed with a 2N aqueous solution of citric acid, aqueous sodium hydrogen carbonate and saturated brine
4. dry with materialafter which it was dried with magnesium sulfate
5. filtrationThe solid was filtered
6. concentrationconcentrated under reduced pressure
7. customafter which crystallization from methanol