Acetic Anhydride → HCID 23453194, compound

Participants

Reaction Conditions

Reaction Steps

5.1 ml of acetic anhydride are added to a solution of 6.5 g of crude 2-aminomethyl-2-hydroxymethyl-3,4,5-trihydroxy-piperidine in 65 ml of methanol/water (1:1) at 0° C. The mixture is stirred at 0° C. for 30 minutes and at room temperature for 18 hours. The solution is concentrated in vacuo, the residue is dissolved in a little water and, to remove the acetic acid formed, the solution is filtered through an anion exchanger in the OH⃝ form and the column is washed with water. The filtrate is concentrated, the residue is dissolved in a little water and the solution is discharged onto a cellulose column 120 cm long and 3 cm wide which contains butanol as the mobile phase. The column is eluted with butanol, 95% pure butanol and 90% pure butanol and the individual fractions are investigated by thin layer chromatography to determine their content of the required compound. The fractions containing the desired product are collected and concentrated. The residue is dissolved in hot methanol and the solution is filtered and concentrated down to a volume of 30 ml. The product crystallises out. The crystallisation is brought to completion by leaving the mixture to stand overnight. The product is filtered off and washed with methanol. 2.7 g of colourless crystals of melting point 196° C. (decomposition) are obtained.

Provenance & Evidence