At last, changed the route of synthesis, improved the yield of bromination and etherifying.Made the yield be raised from 62.5 % to 91 %, and made the cost of production lower.

 
  • 并对其进行了工艺改进;使得溴化和醚化收率明显提高;得收率由62.;5%25提高到91%25;生产成本大大降低。
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