Hydrochloric Acid → HCID 10658688, compound

Participants

Reaction Steps

A mixture of 0.5 g of N-pentyl-4-aminopyridine-3- sulfonamide (Preparation 9) and 0.5 g of paraformaldehyde in 15 cm3 of isopropanol to which 50 drops of ethyl acetate saturated with gaseous HCl have been added is brought to reflux for 48 hours. After this lapse of time, the solvent is removed under partial vacuum. The residue is suspended in 20 cm3 of 0.1N NaOH. After stirring for 1 hour at ambient temperature, the insoluble material is collected on a filter, washed with water and recrystallized twice from a methanol/water (1/2) mixture and then once from CHCl3 /petroleum ether (40°-60° C.) (1/1).

Provenance & Evidence