Methanol → Methyl (2R)-amino(4-hydroxyphenyl)acetate--hydrogen chloride (1/1)

Beteiligte Stoffe

Reaktionsschritte

D-4-Hydroxyphenylglycine 11 (10.1 g, 60.4 mmol) was suspended in methanol (100 ml), and thionyl chloride (5.2 ml, 72.5 mmol) was added dropwise thereto at 50° C. over 0.5 hrs. After further keeping at 50° C. for 3 hrs, the solvent was distilled off under reduced pressure, and toluene and ethyl acetate were added to the residue. A resulting solid was collected by filtration and dried in vacuo to give D-4-hydroxyphenylglycine methyl ester hydrochloride 12 (12.5 g, yield 95.3%).

Herkunft & Nachweise