The acetamide and glycolic acid were ground separately in a grinder and then ground thoroughly in a 1:1 molar ratio of acetamide and glycolic acid. The ground solid powder was added to a 50 mL round bottom flask and heated in a continuous water bath at a constant temperature of 363.15 K in a heat-collecting magnetic stirrer under nitrogen protection until a homogeneous, clear liquid was formed [48 (link)].
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