[Cl:1][CH2:2][C:3](Cl)=[O:4].[CH3:6][NH:7][CH2:8][CH2:9][C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.C(N(CC)CC)C>ClCCl>[Cl:1][CH2:2][C:3]([N:7]([CH3:6])[CH2:8][CH2:9][C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1)=[O:4]At −75° C., chloroacetyl chloride (11.3 g, 8.1 mL, 0.1 mol) was added slowly to a suspension of methyl-phenethyl-amine (13.5 g, 0.1 mol), triethylamine (15 mL) in dichloromethane (50 mL). The suspension was warmed to 25° C. over the course of 3 hours and the salt was removed by filtration. The organic phase was washed with HCl solution (1 N, 200 mL), dried with sodium sulfate. The solvent was evaporated in vacuo to give 2-chloro-N-methyl-N-phenethyl-acetamide (20 g, 95%): 1H NMR (300 MHz, CDCl3) δ 7.2 (m, 5H), 4.03 (s, 3H), 3.6 (m, 2H), 2.99 (s, 2H), 2.8 (m, 2H).
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