Title:
ホスフィン化合物、それを配位子とする遷移金属錯体及び光学活性カルボン酸の製造法
Document Type and Number:
Japanese Patent JP4685001
Kind Code:
B2
Abstract:
[PROBLEMS] To provide a method by which desired optically active carboxylic acids may be prepared from a carboxylic acid having a carbon-carbon double bond through asymmetric hydrogenation with a catalyst consisting of a transition metal complex containing a water-soluble ligand and which permits easy separation of the used catalyst from the product by liquid-liquid separation alone and enables the recovery of an expensive transition metal and the reuse of the catalyst. [MEANS FOR SOLVING PROBLEMS] Phosphines represented by the general formula (1): wherein X1 is oxygen or methylene; X2 is methylene, ethylene, trimethylene, 1,2-dimethylethylene, isopropylidene, or difluoromethylene; A is a Group IA alkali metal of the periodic table, hydrogen, or an ammonium ion; and a, b, c and d are each an integer of 0 or 1, with the proviso that the cases wherein the sum of a, b, c, and d is 0 are excepted.
Inventors:
Amano Akira
Daisuke Igarashi
Noboru Sayo
Daisuke Igarashi
Noboru Sayo
Application Number:
JP2006511913A
Publication Date:
May 18, 2011
Filing Date:
February 25, 2005
Export Citation:
Assignee:
Takasago International Corporation
International Classes:
C07F9/50; C07B53/00; C07C51/36; C07C53/126; C07C53/128; C07F9/655; C07F15/00; C07F15/04; C07B61/00; C07F19/00
Domestic Patent References:
| JPH07252281A | 1995-10-03 |
Attorney, Agent or Firm:
Norio Saeki