Title:
【発明の名称】ペンテンニトリルのカルボニル化方法
Document Type and Number:
Japanese Patent JP2003528849
Kind Code:
A
Abstract:
Processes to prepare 5-cyanovaleric acid or its ester are provided, by carbonylation of a pentenenitrile, wherein pentenenitrile is reacted with carbon monoxide and water and/or an alcohol in the presence of a catalyst system. The catalyst system contains: (a) a metal of Group VIII or a compound thereof and (b) a bidentate phosphine, arsine and/or stibine ligand, wherein the bidentate ligand has the general formula (I): R1R2-M1-R-M2-R3R4 (I) wherein M1 and M2 are independently P, As or Sb, R is a divalent organic bridging group, which bridging group comprises a chain of 3 to 5 atoms directly connecting the 2 phosphorus atoms, which chain consists of carbon atoms and optionally a nitrogen, oxygen or sulphur atom or a silano or dialkylsilicon group, which alkyl groups independently comprise from 1 to 4 carbon atoms, and R1-R4 represent the same or different optionally substituted tertiary alkyl groups, (c) an acid having a pKa less than 3, as measured at 18° C. in an aqueous solution. epsilon-caprolactam is also prepared by reduction of 5-cyanovaleric acid or ester obtained above to 6-aminocaproic acid or ester, and then cyclisation of the 6-aminocaproic acid or ester to epsilon-caprolactam.
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Inventors:
Drent, eight
Willem Wahbe, Jahhel
Willem Wahbe, Jahhel
Application Number:
JP2001570610A
Publication Date:
September 30, 2003
Filing Date:
March 14, 2001
Export Citation:
Assignee:
Ciel International Research Mart Shats Pay BV
International Classes:
B01J31/18; B01J31/24; C07B61/00; C07C67/38; C07C253/30; C07D223/10; C07C255/19; C07D201/08; B01J31/28; (IPC1-7): C07C253/30; B01J31/24; C07C255/19; C07D201/08; C07D223/10
Domestic Patent References:
| JPH10218830A | 1998-08-18 | |||
| JPH0558949A | 1993-03-09 |
Foreign References:
| US6077955A | 2000-06-20 | |||
| DE19840253A1 | 2000-03-09 |
Attorney, Agent or Firm:
Yoshio Kawaguchi (4 outside)