发明申请
US20020115855A1 Process for the preparation of 3-aryl-benzofuran-2-ones 有权
3-芳基 - 苯并呋喃-2-酮的制备方法

  • 专利标题: Process for the preparation of 3-aryl-benzofuran-2-ones
  • 专利标题(中): 3-芳基 - 苯并呋喃-2-酮的制备方法
  • 申请号: US09899450
    申请日: 2001-07-05
  • 公开(公告)号: US20020115855A1
    公开(公告)日: 2002-08-22
  • 发明人: Michele GersterPaul Dubs
  • 优先权: DE00810595.9 20000707
  • 主分类号: C07D475/00
  • IPC分类号: C07D475/00 C07D473/00 C07D47/02
Process for the preparation of 3-aryl-benzofuran-2-ones
摘要:
The instant invention discloses a process for the preparation of compounds of formula I 1 wherein the general symbols are as defined in claim 1, which process comprises hydrolyzing a compound of formula V 2 wherein the general symbols are as defined in claim 1, in an aqueous solvent in the presence of an acid. The compounds of the formula V are new and useful as stabilizers for protecting organic materials, in particular polymers and lubricants, against oxidative, thermal or light-induced degradation.
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