L-Tyrosine → N-Formyl-L-tyrosine

Participants

Reaction Conditions

Reaction Steps

L-Tyrosine (60 g; 0.33 mol) was dissolved in 98% formic acid (400 ml) and cooled to 10° C. Acetic anhydride, (192 ml; 1.73 mol) was added in four stages for five minutes, while at the same time maintaining a temperature of 10° C. The mixture was then stirred for 60 min at 10° C. and then kept at room temperature for 30 min. Water (192 ml) was added with stirring at 10 to 15° C. for 30 min, and then the mixture was subjected to evaporation under reduced pressure at 70° C., until a dry residue was obtained. The residual oily solid was dissolved in a minimal volume of boiling water, and then cooled to produce fine white crystals of N-formyl-L-tyrosine (60.6 g; 88%).

Provenance & Evidence