发明授权
US4503234A Production of 2-(2-aminothiazole-4-yl)-2-(syn)-methoxyimino acetic esters 失效
2-(2-氨基噻唑-4-基)-2-(顺式) - 甲氧基亚氨基乙酸酯的制备

  • 专利标题: Production of 2-(2-aminothiazole-4-yl)-2-(syn)-methoxyimino acetic esters
  • 专利标题(中): 2-(2-氨基噻唑-4-基)-2-(顺式) - 甲氧基亚氨基乙酸酯的制备
  • 申请号: US286636
    申请日: 1981-07-24
  • 公开(公告)号: US4503234A
    公开(公告)日: 1985-03-05
  • 发明人: Alfred HuwilerLeander Tenud
  • 申请人: Alfred HuwilerLeander Tenud
  • 申请人地址: CHX Gampel
  • 专利权人: Lonza Ltd.
  • 当前专利权人: Lonza Ltd.
  • 当前专利权人地址: CHX Gampel
  • 优先权: CHX5658/80 19800724
  • 主分类号: B01J31/02
  • IPC分类号: B01J31/02 C07B61/00 C07D277/20 C07D277/40
Production of 2-(2-aminothiazole-4-yl)-2-(syn)-methoxyimino acetic esters
摘要:
Process for the production of 2-(2-aminothiazole-4-yl)-2-(syn)-methoxyimino acetic ester. First 4-chloroacetoacetic ester is oximized and then the resultant chlorohydroxyimino ester, in solution form, reacted with thiourea to produce 2-(2-aminothiazole-4-yl)-2-(syn)-hydroxyimino acetic ester. The latter is methylated with dimethyl sulfate using phase transfer catalysis.
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