蠀对NEPE推进剂中端羟基聚醚和多异氰酸酯固化体系对水敏感的缺点，为获得新的固化体系，依据点击化学反应(click-chemistry)原理，以聚乙二醇400和丙炔溴为原料，四氢呋喃为溶剂，在催化剂叔丁醇钾存在下，温度30℃，反应时间24h，分离产物并真空干燥后，得到黏稠状液态端炔基聚乙二醇，产率为86.1%。用红外、核磁共振和元素分析对端炔基聚乙二醇进行了表征。研究了端炔基聚乙二醇与叠氮类化合物的固化反应，表明其有望用作新的复合固体推进剂的固化体系。
Abstract
In order to study the factors affecting the nitration products yield and proportion of byproducts of aminopyridine nitration reaction, the dinitration reaction of 4aminopyridine and 2,6diaminopyridine was carried out in mixed acid and super acid. It was observed that nitration products yield increased greatly in super acid system, and proportion of byproducts was reduced. In mixed acid system, the yield of the 4amino3,5dinitropyridine and 2,6diamino3,5dinitropyridine was 55% and 66.4%, respectively, and the proportion of byproducts was 5%-8%; While in super acid system, the yield of the products increased to 85.5% and 92%, respectively, and the proportion of byproducts decreased to 0.5%. The structure of the aminonitropyridines and byproduct was characterized by 1HNMR, IR and MS.
关键词
有机合成 /
4氨基吡啶 /
2,6二氨基吡啶 /
硝化反应 /
混酸 /
超酸硝化体系
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Key words
organic synthesis /
4aminopyridine /
2,6diaminopyridine /
nitration /
mixed acid /
super acid sytem
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参考文献
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脚注
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