Synthesis and properties of novel optically active polyimides
β Scribed by Mehdi Barikani; Shahram Mehdipour-Ataei; Hamid Yeganeh
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 105 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0887-624X
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Tetrachlorophthalic anhydride (1) was reacted with L-leucine (2) in toluene solution at refluxing temperature in the presence of triethylamine and the resulting imide-acid (4) was obtained in quantitative yield. The compound (4) was converted to the N-(tetrachlorophthaloyl)-L-leucine acid chloride (
A series of new optically active aromatic polyimides containing axially dissymmetric 1,1 -binaphthalene-2,2-diyl units were prepared from optically pure ( R)-(/)-or (S)-(0)-2,2-bis(3,4-dicarboxyphenoxy)-1,1 -binaphthalene dianhydrides and various aromatic diamines via a conventional two-step procedu
A series of new fluorine-containing polyimides have been synthesized from the condensation of 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[4-(4-aminophenoxy)phenyl] -1,1,1,3,3,3 -hexafluoropropane, or 2,2 -bis[4 -(4 -amino -2 -trifluoromethylphenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane with va