Title:
【発明の名称】シクロペンテノンの製造方法
Document Type and Number:
Japanese Patent JP2930751
Kind Code:
B2
Abstract:
Process for the preparation of cyclopentenones of the general formula I …… in which R<1> to R<4>, independently of one another, denote hydrogen or an organic radical, by reacting carboxylic esters of the general formulae IIa and/or IIb and/or IIc… R<1>CH = CR<2>-CHR<3>-CHR<4>-CO2R<5> (IIa) and/or… R<1>CH2-CR<2> = CR<3>-CHR<4>-CO2R<5> (IIb) and/or… R<1>CH2-CHR<2>-CR<3> = CR<4>-CO2R<5> (IIc),… in which R<1> to R<4> have the abovementioned meanings and R<5> represents C1- to C8-alkyl, over acid heterogeneous catalysts at temperatures of 50 to 800 DEG C and pressures of 0.001 to 50 bar.
Inventors:
FURANTSU MERUGAA
TOMU UITSUTSUERU
HANSU HORURAA
HERUMUUTO RERUMAA
TOMU UITSUTSUERU
HANSU HORURAA
HERUMUUTO RERUMAA
Application Number:
JP4484791A
Publication Date:
August 03, 1999
Filing Date:
March 11, 1991
Export Citation:
Assignee:
BEE AA ESU EFU AG
International Classes:
B01J21/12; B01J29/06; C07B61/00; C07C45/45; C07C45/54; C07C49/597; (IPC1-7): C07C49/597; B01J21/12; B01J29/06; C07C45/54
Other References:
【文献】欧州特許出願公開297447(EP,A1)
Attorney, Agent or Firm:
Toshio Yano (2 outside)