Tetrahedron letters

Improved solubilization of pyromellitic dianhydride and 4, 4′-oxydianiline in ionic liquid by the addition of zwitterion and their polycondensation

M Tamada, T Hayashi, H Ohno

文献索引：Tamada, Masahiro; Hayashi, Takahiro; Ohno, Hiroyuki Tetrahedron Letters, 2007 , vol. 48, # 9 p. 1553 - 1557

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被引用次数: 41

摘要

Three different ionic liquids were prepared and examined as solvents for polyimide synthesis. The solubility of 4, 4′-oxydianiline and pyromellitic dianhydride as starting materials in ionic liquids was first evaluated, and then their polycondensation was carried out. Although these starting materials were hardly soluble in 1-benzyl-3-methylimidazolium bis (trifluoromethane sulfonyl) imide (3), addition of imidazolium type zwitterion, 1-(1-butyl- ...