Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PRODUCTION OF PARA-ALKOXYBENZALDEHYDE
Document Type and Number:
Japanese Patent JPH0853384
Kind Code:
A
Abstract:

PURPOSE: To provide a method for producing a p-alkoxybenzaldehyde in a high yield without using a large excess of an alkylating agent by alkylating p-hydroxybenzaldehyde with a halogenated alkyl in the presence of a basic material under a specified pH condition.

CONSTITUTION: Para-hydroxybenzaldehyde(p-HBA) is alkylated with a halogenated alkyl of the formula R-X (R is a linear or branched 1-6C alkyl; X is a halogen) in the presence of a basic material (preferably NaOH, KOH or the like) while keeping the pH in 8-12 to provide the objective compound in the method for producing a p-alkoxybenzaldehyde. The p-HBA is preferably used in a form of a reaction mixture including the p-HBA obtained by catalytically oxidizing p-cresol with oxygen in methanol in the presence of an alkali by using iron porphyrin as the catalyst. The alkylation is preferably carried out at a temp. of 70-130°C under a pressure of 2-10 bar. The pH is preferably maintained by adding the before basic material while measuring the weight of the basic material.


Inventors:
ARUBERUTO SHIYUNATSUTERAA
HERUMUUTO FUIIGE
FURANKU IERITSUTO
HANSU GEORUKU SHIYUREE
PEETAA SUKORUNIA
KAARUUHAINTSU TAIZEN
Application Number:
JP14422195A
Publication Date:
February 27, 1996
Filing Date:
May 19, 1995
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
BAYER AG
International Classes:
A61K8/33; A61Q13/00; C07B41/04; C07C45/64; C07C45/70; C07C45/71; C07C47/575; C11B9/00; (IPC1-7): C07C47/575; C07B41/04; C07C45/64; C11B9/00
Attorney, Agent or Firm:
Heiyoshi Odashima