发明授权
- 专利标题: Method for producing 3,4-dihydroxy-3-cyclobutene-1,2-dione
- 专利标题(中): 3,4-二羟基-3-环丁烯-1,2-二酮的制备方法
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申请号: US973157申请日: 1997-12-03
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公开(公告)号: US5808166A公开(公告)日: 1998-09-15
- 发明人: Ikuo Shimizu , Takeshi Usami , Hiroshi Toyoda , Asako Okajima , Shoshiro Matsushita
- 申请人: Ikuo Shimizu , Takeshi Usami , Hiroshi Toyoda , Asako Okajima , Shoshiro Matsushita
- 申请人地址: JPX Tokyo
- 专利权人: Kyowa Yuka Co., Ltd.
- 当前专利权人: Kyowa Yuka Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX8-086410 19960409
- 主分类号: C07C45/43
- IPC分类号: C07C45/43 ; C07C45/63 ; C07C49/517 ; C07C49/707
摘要:
In the formulae, R.sup.1 represents alkyl; and R.sup.2, R.sup.3 and X independently represent halogen. The present invention relates to a method for producing 3,4-dihydroxy-3-cyclobutene-1, 2-dione of general formula (II) by hydrolyzing 3-alkoxy-2, 2, 4, 4-tetrahalogenocyclobutanone derivative of general formula (I).
公开/授权文献
- US4239940A Carrier current communications system 公开/授权日:1980-12-16
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