L-Tyrosine → HCID 53969749, compound

Participants

Reaction Steps

9.1 g (0.05 mole) of L-tyrosine was used, 11.4 g (0.06 mole) of p-toluenesulfonic acid hydrate was used, and 11.79 g (0.055 mole) of myristyl alcohol was used as an alcohol. After 200 ml of toluene was added thereto as a solvent, these materials were stirred and mixed well. The resulting reaction mixture was heated at the reflux temperature of toluene to carry out the esterification reaction. In this case, water was formed with the progress of the esterification reaction and released in the form of an azeotropic mixture with toluene, which was continuously removed from the reaction system. Thus, the reaction was completed in about 7-15 hours. After being cooled to room temperature, the reaction mixture was poured into a separating funnel and treated with 200 ml of a mixture of 0.2N NaOH and 3M NaCl solutions. This treatment was repeated three times. Thereafter, the toluene layer was isolated and washed thoroughly with water. After washing with water, the toluene layer was isolated and dried overnight over anhydrous sodium sulfate. After drying, the toluene layer was filtered and the resulting toluene solution was evaporated to remove the solvent. Thus, there was obtained 15.1 g (80% yield) of purified free L-tyrosine myristyl ester in the form of an oily material.

Provenance & Evidence