反应详情

温度

4 °C

Mix canaline (2.65 g, 20 mmol) and S-methylisothiosemicarbazide hydroiodide (4.66 g, 20 mmol) in 1M NaOH (40 ml) and stir under a blanket N2 at 40° C. for 48 hours. Neutralize the reaction with 1M HCl and blow to a residue with a stream of N2. Apply the residue to a Dowex AG50-X8 column and elute with 0.2M NH4OH. Lyophilize the fractions containing the desired product and take up the resulting solid in water (20 ml). Add flavianic acid (3.2 g) in water (20 ml) and cool the solution to 4° C. for 16 hours. Filter the resulting solid and crystallize to yield the title compound.

1. washApply the residue to a Dowex AG50-X8 column and elute with 0.2M NH4OH
2. additioncontaining the desired product
3. filtrationFilter the resulting solid
4. customcrystallize