Sodium Carbonate → (S)-Methyl 2-(((benzyloxy)carbonyl)amino)-4-methylpentanoate

Participants

Reaction Steps

To a stirring solution of L-leucine methyl ester (2.0 g, 11.0 mmol) in 1,4-dioxane (20 mL) was added aqueous Na2CO3 solution (12.1 mL, 2M in H2O) followed by benzylchloroformate (1.96 g, 11.5 mmol). The mixture stirred at room temperature for 4h then partitioned between ethyl acetate and water. The organic layer was washed with saturated brine, dried (MgSO4), filtered and concentrated to yield the title compound as a colorless oil (3.1 g, 100%). 1HNMR (400 MHz, CDCl3) δ 7.34 (m, 5H), 5.27 (d, 1H), 5.12 (s, 2H), 4.41 (s, 2H), 3.75 (s, 3H), 1.65 (m, 3H), 0.96 (m, 6H).

Provenance & Evidence