Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PREPARATION OF HALOGEN-CONTAINING AROMATIC DICARBOXYLIC ACID AND ITS ESTER
Document Type and Number:
Japanese Patent JPS5962546
Kind Code:
A
Abstract:

PURPOSE: To obtain the titled compound, wherein benzene nucleus is halogenated at its fixed positions, in high yield economically, by using an α,ω-bis(phenoxy) alkane-4,4'-dicarboxylic acid as a starting substance, chlorination or brominating it in the presence of a specific solvent.

CONSTITUTION: An α,ω-bis(phenoxy)alkane-4,4'-dicarboxylic acid or its ester [e.g., 1,2-bis(phenoxy)ethane-4,4'-dicarboxylic acid dimethyl ester, etc.] is reacted with chlorine or bromine in at least one solvent selected from 1W8C halogenated hydrocarbons and 1W2C halogenated carbons, such as chlorobenzene, dichlorobenzene, or tetrachloroethylene, to give a halogen-containing aromatic dicarboxylic acid shown by the formula (X is Cl, Br, or H; R is H, alkyl, or phenyl; n is 2, 4, or 6) or its ester [e.g., 1,2-bis(2-chlorophenoxy)ethane-4,4'-dicarboxylic acid dimethyl ester, etc.].


Inventors:
INOUE SHIYUNEI
KOMATSU HIDEO
Application Number:
JP1982000173323
Publication Date:
April 10, 1984
Filing Date:
October 04, 1982
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TORAY INDUSTRIES
International Classes:
C07C67/307; C07C51/00; C07C51/363; C07C65/21; C07C67/00; C07C69/92; C07C; (IPC1-7): C07C51/363; C07C65/21; C07C67/307; C07C69/92