反应详情

1.27 g (5 mmol) of N-benzyloxycarbonyl-L-homoserine are dissolved in 5 ml of acetic acid, and 0.41 g (5 mmol) of sodium acetate is added. 1.19 g (15 mmol) of acetyl chloride are then added and stirring is carried out for one hour. The acetic acid and the excess acetyl chloride are removed in vacuo, the residue is taken up in 30 ml of methyl isobutyl ketone and 30 ml of water, and the pH is adjusted to 8 using 50% sodium hydroxide solution. The aqueous phase is separated off, adjusted to pH=2 using hydrochloric acid and extracted using 30 ml of methyl isobutyl ketone. Concentration of the organic phase in vacuo yields 0.99 g (67%) of N-benzyloxycarbonyl—O—acetyl-L-homoserine in the form of a colourless oil.

1. customThe acetic acid and the excess acetyl chloride are removed in vacuo
2. customThe aqueous phase is separated off
3. extractionextracted