反应详情

4-[[4-(aminoiminomethyl)phenyl]-amino]-4-oxobutanoic acid hydrochloride prepared in Example 1, Step 1 (4.6 g, 17 mmol) was added to dry DMF (225 ml) followed by N-methylmorpholine (1.2 g, 17 mmol) and isobutyl chloroformate (2.3 g, 17 mmol) at 25° C. The mixture was stirred for 5 min. Dimethyl-3-aminoglutarate (3.0 g, 17 mmol) was added followed by dimethylaminopyridine. After 1 hr, the solvent was removed under reduced pressure and the product purified by reverse phase chromatography (0.05% TFA water/acetonitrile) to result in 3.5 g of a white solid: 1H NMR (d6 -DMSO) δ2.37 (t, 2H, J=7.3 Hz), 2.55 (m, 2H), 2.57 (t, 2H, J=7.1 Hz), 3.57 (s, 6H), 4.35 (m, 1H), 7.79 (s, 4H), 7.99 (d, 1H,J=8.1 Hz), 9.1(bs, 2H), 9.19 (bs, 2H), 10.42 (s, 1H); MS (FAB) m/z 393.2 (MH+).

1. waitAfter 1 hr
2. customthe solvent was removed under reduced pressure
3. customthe product purified by reverse phase chromatography (0.05% TFA water/acetonitrile)