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Patent Searching and Data


Title:
PRODUCTION OF BEZAFIBRATE
Document Type and Number:
Japanese Patent JPH10204047
Kind Code:
A
Abstract:

To produce the subject compound useful as a therapeutic agent for hyperlipemia in high a yield under milder conditions than those of a method without using a solvent by reacting a stoichiometrically excessive raw material with a stoichiometrically excessive K2CO3 in a two-layer system of water and an organic solvent according to a new method.

One mol N-(4-chlorobenzoyl)-tyramine represented by formula I is compounded with 1.7-2.3mol (preferably 3.0mol) ethyl α-bromoisobutyrate represented by formula II, 1.7-2.3mol K2CO3 and 0.1-1.3mol (preferably 1.0mol) phase-transfer catalyst, e.g. tetrabutylammonium bromide and reacted in a solvent prepared by compounding toluene with water at (8:2) to (4:6) mixing ratio at 60-100°C (preferably 80°C) for 3-24hr(preferably 3.5hr) to produce bezafibrate represented by formula III.


Inventors:
NAITO KENJI
MORISONO DAISUKE
Application Number:
JP2576097A
Publication Date:
August 04, 1998
Filing Date:
January 27, 1997
Export Citation:
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Assignee:
WAKAMOTO PHARMA CO LTD
International Classes:
B01J31/02; C07B61/00; C07C231/12; C07C233/73; (IPC1-7): C07C233/73; B01J31/02; C07C231/12