Title:
【発明の名称】クアドラート酸の製造方法
Document Type and Number:
Japanese Patent JP2890856
Kind Code:
B2
Abstract:
A novel process for the preparation of squaric acid by halogenation either of pure 3-acetoxy-2-cyclobuten-1-one or of a distillation residue of diketene production containing 3-acetoxy-2-cyclobuten-1-one to give a cyclobutenone of the general formula II
followed by hydrolysis of these cyclobutenones to give squaric acid.
The halogenated cyclobutenones are novel intermediates in the process.
Inventors:
TOOMASU SHORU
BARII JAKUSON
BARII JAKUSON
Application Number:
JP1803991A
Publication Date:
May 17, 1999
Filing Date:
February 08, 1991
Export Citation:
Assignee:
RONZA LTD
International Classes:
C07C45/43; C07C45/54; C07C49/573; C07C45/64; C07C45/67; C07C49/457; C07C49/493; C07C49/707; (IPC1-7): C07C49/707; C07C45/43
Attorney, Agent or Firm:
Sou Suga