Allyl bromide → Methyl 2-(allyl(benzyl)amino)acetate

Reaction equation

[CH2:1]([NH:8][CH2:9][C:10]([O:12][CH3:13])=[O:11])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([O-])([O-])=O.[K+].[K+].[CH2:20](Br)[CH:21]=[CH2:22]>CN(C=O)C>[CH2:22]([N:8]([CH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1)[CH2:9][C:10]([O:12][CH3:13])=[O:11])[CH:21]=[CH2:20]

Participants

Procedure

To a solution of methyl 2-(benzylamino)acetate (21.30 g, 119.2 mmol, 1.0 eq) in DMF (150 mL) was added anhydrous K2CO3 (8.02 g, 143.02 mmol, 1.2 eq) followed by allyl bromide (12.37 mL, 143.02 mmol, 1.2 eq) at room temperature. The mixture was stirred for 4 h, quenched with water and extracted with EtOAc (100 mL×3). The combined organic phases were washed with water and brine, dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by a silica gel column chromatography (20:1 (v/v) PE/EtOAc) to afford the title compound as colorless oil (18.30 g, 70%). The compound was characterized by the following spectroscopic data: 1H NMR (400 MHz, CDCl3) δ: 3.27 (2H, d, J=6.4 Hz), 3.32 (2H, s), 3.68 (3H, s), 3.78 (2H, s), 5.19 (2H, m), 5.88 (1H, m), 7.23-7.35 (5H, m) ppm.