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Title:
IMPROVED PRODUCTION OF SUBSTITUTED HYDROXYHYDROCINNAMIC ACID ESTER BY REMOVAL OF TIN CATALYST
Document Type and Number:
Japanese Patent JPH11310546
Kind Code:
A
Abstract:

To simply obtain the subject compound useful as an antioxidant by reacting raw materials until a tin catalyst forms an inactive derivative in the absence of an aqueous solvent.

This method for producing a compound of the formula [R is a 1-4C alkyl; (n) is 0-2; (m) is 1-4; A is a 1-18C alkyl, when (m) is 1, or A is a 2-12C alkylene or the like, when (m) is 2] (preferably, isooctyl 3,5- ditertiarybutyl-4-hydroxyhydrocinnamate) comprises subjecting (B) the corresponding lower alkyl ester to a transesterification reaction with (C) an alcohol of the formula: A-(OH)m in the presence of (A) a tin catalyst, preferably monobutyl tin tris(2-ethylhexoate), etc. Therein, the tin catalyst transesterification reaction product is reacted with (D) a carboxylic acid or its hydrate until the component A forms an insoluble derivative in the absence of an aqueous solvent, and the insoluble derivative is filtered off from the reaction product without using a filtration auxiliary.


Inventors:
ROSS JOHN RICHARD
Application Number:
JP1999000023711
Publication Date:
November 09, 1999
Filing Date:
February 01, 1999
Export Citation:
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Assignee:
CIBA SC HOLDING AG
International Classes:
B01J31/12; C07B61/00; C07C67/03; C07C67/60; C07C69/732; (IPC1-7): C07C67/03; B01J31/12; C07C69/732
Attorney, Agent or Firm:
萼 経夫 (外1名)