Title:
【発明の名称】3-ヒドロキシ-2-シクロブテン-1-オン-塩、その製造方法および使用
Document Type and Number:
Japanese Patent JP2890860
Kind Code:
B2
Abstract:
3-Hydroxy-2-cyclobuten-1-one salts of the general formula: I wherein R is an ammonium group of the general formula: II wherein R1, R2 and R3 are the same or different in meaning and each is a hydrogen atom, a lower alkyl group or a cycloalkyl group or R is an alkali metal atom. The salts according for formula I are obtained by the reaction of pure 3-acetoxy-2-cyclobuten-1-one, or 1,3-cyclobutanedione or a distillation residue of the diketene production containing 3-acetoxy-2-cyclobuten-1-one, with a base. The base can be an amine of the general formula: III wherein R1, R2 , and R3 have the above-mentioned meaning, or an alkali metal alcoholate or an alkali metal hydroxide. The salts according to formula I are suitable for the production of squaric acid, by their being halogenated in a first step and then being hydrolyzed to squaric acid in a second step.
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Inventors:
BARII JAKUSON
TOOMASU SHORU
TOOMASU SHORU
Application Number:
JP2887691A
Publication Date:
May 17, 1999
Filing Date:
February 22, 1991
Export Citation:
Assignee:
RONZA LTD
International Classes:
C07C45/43; C07C45/51; C07C45/63; C07C45/64; C07C45/67; C07C45/42; C07C45/68; C07C49/573; C07C49/593; C07C49/707; C07C209/12; C07C211/05; C07C211/35; C07C211/62; (IPC1-7): C07C49/707; C07C45/42; C07C45/63; C07C45/64; C07C209/12
Attorney, Agent or Firm:
Sou Suga