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Direct Synthesis of N, N-Dimethylglycolic Amide
Author(s): 
Pages: 186-190
Year: Issue:  2
Journal: Petrochemical Technology

Keyword:  glycolic aciddimethylamineNN-dimethylglycolic amidemolybdenum oxide catalystzinc oxide catalyst;
Abstract: 以乙醇酸和二甲胺为原料,固体金属氧化物为催化剂,采用一步法合成N,N-二甲基羟基乙酰胺.考察了催化剂种类、原料配比、反应温度、反应压力、反应时间、催化剂用量对N,N-二.甲基羟基乙酰胺收率的影响.实验结果表明,在12种催化剂中,MoO3和ZnO催化剂具有良好的催化性能;以MoO3为催化剂时,N,N-二甲基羟基乙酰胺适宜的合成条件为:甲醇为溶剂、n(二甲胺)∶n(乙醇酸)=5.0、n(催化剂)∶n(乙醇酸)=2%、乙醇酸0.2 mol、甲醇200 mL、150℃、2.4 MPa、5h.在此条件下,N,N-二甲基羟基乙酰胺的收率达到77.0%.1H NMR表征结果显示,合成的产物为N,N-二甲基羟基乙酰胺,气相色谱分析表明其纯度高达99.9%.
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