反应详情

Palladium on carbon (0.5 g; 10% [w/w]) was added to a 1L hydrogenation flask under a nitrogen atmosphere. The crude ethyl 4-azidomethylsalicylate was dissolved in methanol (200 mL) and transferred to the hydrogenation flask. Concentrated-aqueous hydrochloric acid (2 mL) was then added, and the flask was affixed to the Parr hydrogenator. The reaction mixture was shaken under 35 psi of hydrogen for 4 hours at room temperature. The mixture was then filtered through Celite to remove the catalyst, and the filtrate was evaporated to dryness to afford an off-white solid. Finally, this solid was crystallized from EtOH to afford 3.1 g (71% yield) of ethyl 4-aminomethylsalicylate hydrochloride (m.p. 240°-241 ° C.).

1. filtrationThe mixture was then filtered through Celite
2. customto remove the catalyst
3. customthe filtrate was evaporated to dryness
4. customto afford an off-white solid
5. customFinally, this solid was crystallized from EtOH