Potassium Carbonate → 2,2'-[(2-{[3-(Benzyloxy)-3-oxopropyl]amino}-2-oxoethyl)imino]diacetic acid

To an ice bath cooled solution of benzyl 3-aminopropanoate hydrochloride (4.49 g, 20.8 mmol) in DMF (30 mL) was added K2CO3 (3.02 g, 21.84 mmol) and the resulting mixture was stirred at o° C. for 2 hr. The mixture was then filtered and the filtrate was added to an ice bath cooled solution of 2-(2,6-dioxomorpholino)acetic acid (4.47 g, 25.8 mmol) in DMF (30 mL). The resulting mixture was stirred at 0° C. for 30 min, then at rt for 2 hr. The reaction was quenched by the addition of water (30 mL) and the resulting mixture was concentrated. The residue was stirred with water (40 mL), and the resulting precipitate was collected through filtration and dried to give the title compound. 1H NMR (DMSO-d6) δ 2.53 (t, J=6.8, 2H), 3.27 (s, 2H), 3.36 (q, J=6.2, 2H), 3.42 (m, m 2H), 3.49 (s, 2H), 5.09 (s, 2H), 7.28 (m, 4H), 8.16 (m, 1H), 12.45 (br s, 2H).

1. filtrationThe mixture was then filtered
2. additionthe filtrate was added to an ice bath
3. stirringThe resulting mixture was stirred at 0° C. for 30 min
4. waitat rt for 2 hr
5. customThe reaction was quenched by the addition of water (30 mL)
6. concentrationthe resulting mixture was concentrated
7. stirringThe residue was stirred with water (40 mL)
8. filtrationthe resulting precipitate was collected through filtration
9. customdried

ORD-Eintrag

ord-017ba17c0fc54d9ab0d8a33f5cfce7fa

Quelldatensatz

uspto-grants-2016_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09427475B2