Chinese Journal of Applied Chemistry

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Synthesis of Bis(3-amino-4-hydroxyphenyl) Bisphenol Ether

ZHANG Qianfeng1, TANG Anbin1,2*, HUANG Jie2, MA Hanbing1, YANG Yuchuan2   

  1. (1.School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China;
    2.Sichuan EM Technology Co.,Ltd,National Insulating Material Engineering Research Center,Mianyang 621000,China)
  • Received:2012-11-05 Revised:2013-02-07 Published:2013-09-10 Online:2013-09-10

Abstract: Four monomers of polybenzoxazole having the structure of bisphenol aromatic ether, bis(3-amino-4-hydroxyphenyl) bisphenol ether, were prepared from bisphenols and 4-chloro(or bromo)-phenol by successive 4 steps of synthetic routes including benzyl protection, Ullmann reaction, selective nitrification and reduction-deprotection. The effect of reaction conditions on the Ullmann reaction was investigated. The high region selection of the nitrification is confirmed. The process of after-treatment of the reduction-deprotection was optimized and the quality and yield of the product were improved. The total yield of 4 steps reaction can reach up to 54.0%. The target compound and its intermediates were characterized by means of IR, 1H NMR and HRMS.

Key words: monomer of polybenzoxazole, Ullmann reaction, bis(aminohydroxyphenyl) bisphenol ether, synthesis

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