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In the present study, we synthesized highly organosoluble optically active aromatic PAs containing amino acid, L-phenylalanine and anthracenic moieties in the pendant groups via direct polycondensation of optically active dicarboxylic acid, 5-[3-phenyl-2-(9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboximido)propanoylamino] isophthalic acid and several aromatic diamines using 1,3-dipropylimidazolium bromide/triphenyl phosphite (TPP) or N-methyl-2-pyrrolidinone (NMP)/ pyridine (Py)/TPP/CaCl2 as condensing agent under microwave irradiation and the results have been compared.
Experimental part
Materials
All chemicals were purchased from Fluka Chemical Co. (Buchs, Switzerland),Aldrich Chemical Co. (Milwaukee, WI), Riedel¨CdeHaen AG (Seelze, Germany),and Merck Chemical Co. 4,40-Diaminodiphenylmethane (9a) was purified by recrystallization from water. Benzidine (9b) was purified by recrystallization from ethanol. 4,40-Diaminodiphenylether (9c), 2,5-diaminotoluene (9e), and 1,4-phenylenediamine (9f) were purified by sublimation. N-(Trimethylsilyl)imidazole and 1-bromopropane were purchased from Merck Chemical Co. (Germany). 1,3- Dipropylimidazolium bromide ([1,3-(pr)2im]Br) was prepared by reported procedure [19].
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jiangguofeng

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