Methanol → Methyl L-lysinate dihydrochloride

Participants

Reaction Steps

To a mixture of L-Lysine-Hydrochloride (100 g) in 1.75 L of methanol at 0° C. was bubbled dry HCl for 7 hours. The crude solid product was filtered, dried to get pure L-Lysine methyl ester dihydrochloride (117 g, 91.6%) as a white powder with a melting point of 204.5-206° C. The compound was characterized by 1H NMR (DMSO-d6) δ 1.48 (m, 2H, CH2), 1.68 (m, 2H, CH2), 1.90 (m, 2H, CH2), 2.80 (m, 2H, CH2), 3.78 (s, 3H, Ester), 4.00 (t, 1H, CH), 8.20 (bs, 2H, NH2), 8.70 (bs, 2H, NH2).

Provenance & Evidence