反应详情

Heat a solution of ethyl 3-aminopropanoate hydrochloride (80.0 g, 0.52 mol), benzylbromide (186.7 g, 1.1 mol) and K2CO3 (179.4 g, 1.3 mol) in acetonitrile (1 L) at 40° C. overnight. Concentrate the mixture to dryness, treat with water, extract with EtOAc (3×), wash the combined organics with brine, dry over Na2SO4, concentrate to dryness and purify via silica gel chromatography (Pet Ether/EtOAc, 50:1) to afford the title compound (150 g, 97% yield). 1H NMR (400 MHz, CDCl3): δ 7.35-7.21 (m, 10H), 4.09 (q, J=7.2 Hz, 2H), 3.58 (s, 4H), 2.82 (t, J=7.2 Hz, 2H), 2.50 (t, J=7.2 Hz, 2H), 1.21 (t, J=7.2 Hz, 3H).

1. concentrationConcentrate the mixture to dryness
2. additiontreat with water
3. extractionextract with EtOAc (3×)
4. washwash the combined organics with brine
5. dry with materialdry over Na2SO4
6. concentrationconcentrate to dryness
7. custompurify via silica gel chromatography (Pet Ether/EtOAc, 50:1)