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The production method of 2,6-dimethoxynaphthalene

A technology of dimethoxynaphthalene and a production method is applied in the directions of ester reaction preparation of ether, ether preparation, organic chemistry, etc., can solve the problems of long reaction time and low yield, etc., and achieves low reaction condition requirements and high product yield. , the effect of simple process route

Inactive Publication Date: 2011-12-21
陆兴艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. In foreign countries, 2,6-dihydroxynaphthalene is generally synthesized by directly reacting with dimethyl sulfate in lye, and the reaction time is long and the yield is low.

Method used

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  • The production method of 2,6-dimethoxynaphthalene
  • The production method of 2,6-dimethoxynaphthalene

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A kind of production method of 2,6-dimethoxynaphthalene, 2,6-dihydroxynaphthalene is dissolved in alcoholic solvent (such as methyl alcohol, ethanol, isopropanol), under alkaline condition (add alkali solution for Potassium hydroxide or sodium hydroxide) slowly add dimethyl sulfate solution and react at 20-70°C (such as 20°C, 30°C, 40°C, 50°C, 60°C, 70°C) for 3-6 Hour (as 3, 3.5, 4, 4.5, 5, 5.5, 6 hours) generates 2,6-dimethoxynaphthalene, and its reaction formula is:

[0015]

[0016] The amount of alcohol solvent is based on the complete dissolution of the raw material 2,6-dihydroxynaphthalene, the purity of the used 2,6-dihydroxynaphthalene is ≥98%, and the concentration of sodium hydroxide or potassium hydroxide solution is 15-45% (such as 15%, 20%, 25%, 30%, 35%, 40%, 45%), the molar ratio of 2,6-dihydroxynaphthalene and dimethyl sulfate is 1: 2.8, and the 2 , The average yield of 6-dimethoxynaphthalene was 70.1%.

Embodiment 2

[0018] The molar ratio of 2,6-dihydroxynaphthalene and dimethyl sulfate is 1: 3.0, all the other are the same as in Example 1, and the average yield of 2,6-dimethoxynaphthalene generated by the reaction is 85.4%.

Embodiment 3

[0020] The molar ratio of 2,6-dihydroxynaphthalene and dimethyl sulfate is 1: 3.5, all the other are the same as in Example 1, and the average yield of 2,6-dimethoxynaphthalene generated by the reaction is 86.2%.

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Abstract

The invention discloses a production method of 2,6-dimethoxynaphthalene. The production method of the invention has short reaction time and high product yield, and the purity of the 2,6-dimethoxynaphthalene produced by the reaction is as high as 98% or more .

Description

Technical field: [0001] The invention relates to a method for producing aromatic compounds. Background technique: [0002] Retrieval of relevant information: [0003] 1. So far, no other unit in China has researched or produced 2,6-dimethoxynaphthalene. [0004] 2. In foreign countries, 2,6-dihydroxynaphthalene is generally synthesized by directly reacting with dimethyl sulfate in lye, and the reaction time is long and the yield is low. Invention content: [0005] The object of the present invention is to provide a kind of reaction time is short, the production method of the 2,6-dimethoxynaphthalene that product yield is high. [0006] The objective technical solution of the present invention is: [0007] A kind of 2, the production method of 6-dimethoxynaphthalene, its difference with prior art is that 2,6-dihydroxynaphthalene is dissolved in the alcoholic solvent, under alkaline condition and dimethyl sulfate React at 20-70°C for 3-6 hours to generate 2,6-dimethoxyna...

Claims

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Application Information

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IPC IPC(8): C07C43/20C07C41/16
Inventor 陆兴艳
Owner 陆兴艳
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