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Synthetic process of 3-methoxydiphenylamine

A technology of methoxydiphenylamine and synthesis process, applied in the chemical industry, can solve the problems of immature production technology, complex production process and low purity, and achieve the effects of good use effect, high purity and easy availability of raw materials

Inactive Publication Date: 2014-09-24
安徽佑骏商品混凝土有限公司
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Problems solved by technology

[0002] 3-Methoxydiphenylamine, also known as m-methoxydiphenylamine, is an important intermediate for the production of 2-methoxyphenothiazine and fluoran thermosensitive dyes. A phenothiazine derivative newly developed on the Internet. The demand for this product is relatively large in medicine, pesticides and polymerization inhibitors for polymer monomers. However, the domestic production technology of this product is not yet mature, so 3- The market prospect of methoxydiphenylamine is broad, and the synthesis of this product has great social and economic benefits. At present, there are problems such as low yield and low purity in industrial production, and the production process is relatively complicated, which is difficult to meet human needs.

Method used

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Embodiment Construction

[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0022] A kind of 3-methoxydiphenylamine synthetic technique, comprises following processing step,

[0023] (1) Synthesis of N-formanilide

[0024] a. Select 85% formic acid and put it into the reactor equipped with mechanical stirring, thermometer and spherical condenser, add aniline under the condition of constant stirring and then heat to reflux for 180min.

[0025] b. distilling the solution after the reflux reaction to distill off excess formic acid to obtain a residual mixture.

[0026] c. The residual mixture in b is decompressed and distilled again to obtain N-formanilide.

[0027] (2) Synthesis of 3-methoxydiphenylamine

[0028] a. Add m-bromoanisole into the reaction kettle and stir, then put potassium carbonate, N-formanilide, copper ...

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Abstract

The invention discloses a synthetic process of 3-methoxydiphenylamine, relating to the technical field of chemical engineering. The process comprises the following steps: reacting formic acid with phenylamine to prepare N-formanilide at first, and then reacting N-formanilide, potassium carbonate, copper powder, iodine, potassium hydroxide and ethanol to prepare 3-methoxydiphenylamine. The process has the beneficial effects that the 3-methoxydiphenylamine is convenient and simple to prepare, environment-friendly, pollution-free, high in purity, convenient to operate, safe and reliable, and has a good use effect; raw materials are easily available and the equipment investment is low.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a synthesis process of 3-methoxydiphenylamine. Background technique [0002] 3-Methoxydiphenylamine, also known as m-methoxydiphenylamine, is an important intermediate for the production of 2-methoxyphenothiazine and fluoran thermosensitive dyes. A phenothiazine derivative newly developed on the Internet. The demand for this product is large in medicine, pesticides, and polymerization inhibitors for polymer monomers. However, the domestic production technology of this product is not yet mature, so 3- The market prospect of methoxydiphenylamine is broad, and the synthesis of this product has great social and economic benefits. At present, there are problems such as low yield and low purity in industrial production, and the production process is relatively complicated, which is difficult to meet human needs. Contents of the invention [0003] The technical problem to b...

Claims

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Application Information

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IPC IPC(8): C07C217/92C07C213/02
Inventor 刘超金士明赵秀进常好银
Owner 安徽佑骏商品混凝土有限公司
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