Palmitoyl chloride → (R)-3-(4-hydroxyphenyl)-2-palmitamidopropanoic acid

Participants

Reaction Steps

To a solution of L-Tyrosine methyl ester hydrochloride (1 g, 4.3 mmol) in CH2Cl2 was added triethylamine (1.49 mL, 8.6 mmol) at room temperature. Palmitoyl chloride (1.53 g, 5.6 mmol) was then added to the reaction mixture at 0° C. After the reaction was completed, as judged by TLC, the reaction mixture was quenched and extracted with 1 N HCl (3×5 mL) then saturated sodium bicarbonate (1×5 mL). The combined organic layers were dried with Na2SO4 and evaporated under vacuum to a white solid (1.86 g, 4.3 mmol). The product was carried on without further purification. 1H NMR (300 MHz, CDCl3, 23° C., 6): 6.94 (d, 1H, J=8.5), 6.73 (d, 1H, J=8.5), 5.92 (d, 1, H, J=8.0), 4.90 (d, 1H, J=5.8), 4.85 (d, 1H, J=5.8), 3.73 (s, 3H), 3.04 (ddd, 1H, J=5.8, 14.0, 27.7), 2.26-2.12 (m, 1H), 1.58 (m, 2H), 1.25 (m, 24H), 0.90 (t, 3H, J=6.67).

Provenance & Evidence