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Microwave-assisted polycondensation of 4,4′-(hexafluoroisopropylidene)-N,N′-bis(phthaloyl-L-leucine) diacid chloride with aromatic diols

✍ Scribed by Shadpour E. Mallakpour; Abdol-Reza Hajipour; Sepideh Khoee

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
130 KB
Volume
77
Category
Article
ISSN
0021-8995

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A new facile and rapid polycondensation reaction of 4,4Ј-(hexafluoroisopropylidene)-N,NЈ-bis(phthaloyl-L-leucine) diacid chloride (1) with several aromatic diamines, including benzidine (2a), 4,4Ј-diaminodiphenyl methane (2b), 1,5-diaminoanthraquinone (2c), 4,4Ј-sulfonyldianiline (2d), 3,3Ј-diaminob

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## Abstract 3,3′,4,4′‐Diphenylsulfonetetracarboxylic dianhydride (**1**) was reacted with __L__‐leucine (**2**) in acetic acid and the resulting imide‐acid (**3**) was obtained in high yield. The diacid chloride (**4**) was prepared from diacid derivative (**3**) by reaction with thionyl chloride.