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Optically Active Aromatic Polyimides Having Axially Dissymmetric 1,1‘-Binaphthalene-2,2‘-diyl Units

✍ Scribed by Mi, Qiding; Gao, Lianxun; Ding, Mengxian


Book ID
126259945
Publisher
American Chemical Society
Year
1996
Tongue
English
Weight
136 KB
Volume
29
Category
Article
ISSN
0024-9297

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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

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Optically active 2,2Ј-bis(2-trifluoro-4-aminophenoxy)-1,1Ј-binaphthyl and its corresponding racemate were prepared by a nucleophilic substitution reaction of 1,1Ј-bi-2-naphthol with 2-chloro-5-nitrotrifluorotoluene and subsequently by the reduction of the resulting dinitro compounds. A series of opt