[H-].[Na+].CN(C)C=O.[C:8]([NH:11][OH:12])(=[O:10])[CH3:9].[CH2:13](Br)[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1>O>[CH2:13]([O:12][NH:11][C:8](=[O:10])[CH3:9])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=160% sodium hydride (11.68 g, 0.292 mol) was added to a dimethylformamide solution (200 ml) of acetohydroxamic acid (21.9 g, 0.292 mol) with cooling in an ice bath. After stirring for 1 hour at room temperature, benzylbromide (50 g, 0.292 mol) was added thereto and allowed to react for 24 hours at room temperature. The reaction solution was poured into 500 ml of water, and extracted with ethyl acetate. The organic layer was rinsed with water and dried. After removing the solvent by evaporation, the residue was purified with silica gel chromatography to obtain 31.3 g of N-benzyloxyacetamide (yield: 65%). The proton NMR spectrum of the compound is 1.85 s (3H); 4.89 bs (2H); 7.37 s (5 H); 8.30 bs, 8.81 bs (1H) (solvent: CDCl3).
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