2-methyl-5-chloro-1,4-diaminobenzene and its prepn and application

A technology of p-phenylenediamine and methyl, applied in the field of 2-methyl-5-chloro-1, can solve problems such as no synthesis method, and achieve the effects of wide application, high output value and mild reaction conditions

Inactive Publication Date: 2002-05-22
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] The compounds of the present invention have not been reported in the literature at home, and there is no synthetic method

Method used

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Examples

Experimental program
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Embodiment Construction

[0010] Add 14.2g of 2-methyl-5-chloro-aniline, 120mL of 60% acetic acid, and 16.5mL of acetic anhydride into a 250mL three-necked flask, stir and react at 70-75°C for 1.5h, pour 5 times the amount of ice containing 10% NaCl Disperse in aqueous solution, filter, and dry to obtain white product N-acetyl-2-methyl-5-chloro-aniline, about 18.2 g, yield 99%, melting point 135-136°C.

[0011] Put 14.7g of the above self-made N-acetyl-2-methyl-5-chloro-aniline into a 250mL three-necked flask, add 45mL of glacial acetic acid and 58mL of concentrated sulfuric acid, heat to 40°C, stir to dissolve, cool to room temperature, and slowly drop Add 21 mL of nitric acid, stir and react at room temperature for 2 hours, pour into 5 times the amount of ice water to disperse, filter, wash the product with water until pH = 5, and dry to obtain the light yellow product N-acetyl-2-methyl-4-nitro-5 -Chloro-aniline 17.3g, yield about 95%.

[0012] Put 11.4 g of the above nitrated product in a 250 mL th...

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Abstract

The present invention discloses a compound 2-methyl-5-chloro-1,4-p-phenylenediamine, its preparation method and use. It is characterized by that under the acidic condition 2-methyl-5-chloro-phenylamine and acetic anhydride are reacted to obtain N-acetyl-2-methyl-5-chloro-phenylamine, then it uses a mixed acid to make said obtained material undergo the process of nitrate to obtain N-acetyl-2-methyl-4-nitro-5-chloro-phenylamine, and then makes said material undergo the hydrolysis to remove acetyl, and finally utilizes hydrochloric acid and adds the iron powder to make reduction to obtain the invented product. Said compound can be used for synthesizing paint, and synthesizing dyestuff, also can be used for preparing colour developing reagent.

Description

Technical field [0001] The present invention relates to a new phenylenediamine compound and its preparation method and application, specifically a 2-methyl-5-chloro-1,4-p-phenylenediamine and its preparation method and application. Background technique [0002] The compound of the present invention has not been reported in the literature at home, and there is no synthetic method. These compounds can be used as paint intermediates, dye intermediates, and color developers for the manufacture of thermal shadow materials, and are valued for their good export prospects. Contents of the invention [0003] The object of the present invention is to provide a kind of 2-methyl-5-chloro-1,4-p-phenylenediamine and its preparation method and application. The compound can be used as a coating intermediate, a dye intermediate, and can also be used as a color developer for manufacturing thermal shadow materials. The preparation method is reasonable, the operation is simple, the reaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/00C07C209/32C07C211/52G03G5/06
Inventor 张治民刘秀英姚彦章张华张雯
Owner WUHAN UNIV
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