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Preparation method of 2,4,6-tri(2',4'-dihydroxyphenyl)-1,3,5-triazine

A technology of dihydroxyphenyl and cyanuric chloride, which is applied in chemical recovery, organic chemistry, etc., can solve environmental pollution and other problems, and achieve the effects of avoiding environmental pollution, simple and easy-to-obtain catalysts, and simple reaction steps

Active Publication Date: 2016-01-06
BEIJING TIANGANG AUX CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the deficiency of the environmental pollution existing in existing catalyst, provide a kind of cheap, green and efficient 2,4,6-three (2', 4'-dihydroxyphenyl)-1,3, The synthetic method of 5-triazine

Method used

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  • Preparation method of 2,4,6-tri(2',4'-dihydroxyphenyl)-1,3,5-triazine
  • Preparation method of 2,4,6-tri(2',4'-dihydroxyphenyl)-1,3,5-triazine

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Embodiment 1

[0030] Add 0.92g (5mmol) cyanuric chloride successively in 100mL there-necked flask, 20mL anhydrous tetrahydrofuran, add 1.65g (15mmol) resorcinol under stirring; Add 50wt% Fe after heating up to dissolve completely 2 o 3 ; Reaction at 80°C for 24h. The reaction liquid was cooled to room temperature, and the filtrate obtained by suction filtration was used for liquid phase analysis, and the yield of the target product was 56.42%.

Embodiment 2

[0032] Add 0.92g (5mmol) cyanuric chloride successively in the 100mL there-necked flask, 20mL anhydrous tetrahydrofuran, add 1.65g (15mmol) resorcinol under stirring; After heating up to dissolve completely, add 70wt% Fe 2 o 3 ; Reaction at 80°C for 24h. The reaction solution was cooled to room temperature, and the filtrate obtained by suction filtration was used for liquid phase analysis, and the yield of the target product was 58.33%.

Embodiment 3

[0034] Add 0.92g (5mmol) cyanuric chloride successively in 100mL there-necked flask, 20mL anhydrous tetrahydrofuran, add 1.65g (15mmol) resorcinol under stirring; Add 20wt% Fe after heating up to dissolve completely 2 o 3 ; Reaction at 80°C for 24h. The reaction solution was cooled to room temperature, and the filtrate obtained by suction filtration was used for liquid phase analysis, and the yield of the target product was 24.62%.

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Abstract

The invention discloses a synthetic method of 2,4,6-tri(2',4'-dihydroxyphenyl)-1,3,5-triazine. The method comprises the following steps: cyanuric chloride and resorcinol are taken as raw materials and react in an aprotic or protic solvent at the reaction temperature of 20-100 DEG C under the action of a metal oxide or supported solid acid catalyst, 2,4,6-tri(2',4'-dihydroxyphenyl)-1,3,5-triazine is generated, a reaction mixture is filtered and separated, and the catalyst can be recycled and reused after washing. The method has simple reaction steps and low cost; the adopted catalyst is simple, easy to obtain and stable in activity, environmental pollution caused by use of a traditional Lewis acid catalyst is avoided, and good catalytic effect is realized.

Description

technical field [0001] The invention belongs to the field of fine chemical synthesis, in particular to the preparation of a triazine ultraviolet absorber intermediate 2,4,6-tris(2',4'-dihydroxyphenyl)-1,3,5-triazine method. Background technique [0002] Triazine UV absorbers are a kind of high-efficiency and broad-spectrum UV absorbers, which are widely used in polymer materials such as plastic films, plexiglass, and building materials. Foreign companies such as Ciba and BASF have successfully developed a number of triazine UV absorbers; my country's Shanxi Institute of Chemical Industry has also carried out a lot of work on triazine UV absorbers, and successfully developed triazine-5( Chemical name: 2,4,6-tris(2'-hydroxy-4'-n-butoxy)-1,3,5-triazine). Triazine-5 has the characteristics of wide ultraviolet absorption range and high efficiency, and 2,4,6-tris(2',4'-dihydroxyphenyl)-1,3,5-triazine is precisely triazine-5 important intermediates. With the continuous improveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/24
CPCY02P20/584C07D251/24
Inventor 陈靖李靖李飞刘罡
Owner BEIJING TIANGANG AUX CO LTD
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