Lithium Hydroxide → 3-[[4-[[4-(Aminoiminomethyl)phenyl]amino]-1,4-dioxobutyl]amino]-4-methoxypentanoic acid

Participants

Reaction Steps

Methyl-3-[[4-[[4-(aminoiminomethyl)phenyl]amino]-1,4-dioxobutyl]amino]-4-methoxypentanoate prepared in Example 25, Step 2 (500 mg) was added to water/acetonitrile (20 ml) followed by lithium hydroxide (100 mg) at 25° C. The mixture was stirred for 30 min. The course of the reaction was monitored by RPHPLC. After satisfactory product was formed the reaction was neutralized with TFA and purified by reverse phase chromatography (water/acetonitrile) to result in 450 mg of a white solid: 1H NMR (d6 -DMSO) δ1.74 (m, 2H), 2.4 (m, 4H), 2.6 (m, 2H), 3.16 (s, 3H), 3.33 (m, 2H), 4.12 (m, 1H), 7.78 (s, 4H), 7.81 (d, 1H, J=8.5 Hz), 9.02 (bs, 2H), 9.15 (bs, 2H), 10.40 (s, 1H); MS (FAB) m/z 365.4 (MH+).

Provenance & Evidence