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Home  >  Journal list  >  Polymer Journal  >  Vol.31  No.10 (1999)  >  pp.822-827

Polymer Journal
<<Previous article Vol.31  No.10 (1999)   pp.822 - 827 Next article>>

Chemoselective Polyamidation of 3,3′-Dihydroxybenzidine

Hiroshi Seino1), Kazuyuki Iguchi1), Osamu Haba1), Yoshihiro Oba2) and Mitsuru Ueda1)
1) Department of Human Sensing and Functional Sensor Engineering, Graduate School of Engineering, Yamagata University
2) Department of Materials Science and Engineering, Faculty of Engineering, Yamagata University


ABSTRACT:  A chemoselective synthesis of poly(o-hydroxy-amide) as a polybenzoxazole precursor has been developed. The polycondensation was carried out by addition of isophthaloyl dichloride to a solution of 3,3′-dihydroxybenzidine and lithium chloride in N-methylpyrrolidinone and gave the selective N-acylated polymer, poly(o-hydroxy-amide) with an inherent viscosity of 0.7 dLg−1. The structure of the polymer was characterized by IR, 1H, and 13C NMR spectroscopies. The model reaction was studied in detail to demonstrate the feasibility of the chemoselective polyamidation using benzoyl chloride and o-aminophenol.


Keyword:
Chemoselective/ Polyamidation/ Poly(o-hydroxy-amide)/ Isophthaloyl Dichloride/ 3,3′-Dihydroxybenzidine

Published online: March 27, 2005
© Copyright, 2005 by The Society of Polymer Science, Japan

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