Preparation method of 5, 5'-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) aniline)

A technology of perfluoropropane and allyloxy, which is applied in the field of preparation of 5,5'-bisaniline), can solve the problems of incapable of industrialized production, severe reaction conditions, low process yield and the like, and reduces the reaction risk factor. , The effect of reducing production cost and simple reaction operation

Pending Publication Date: 2021-11-12
上海毕得医药科技股份有限公司
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  • Claims
  • Application Information

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Problems solved by technology

Synthesis of this compound in the prior art has the disadvantages of harsh reaction conditions, low process yield, and incapable of industrial production

Method used

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  • Preparation method of 5, 5'-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) aniline)
  • Preparation method of 5, 5'-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) aniline)
  • Preparation method of 5, 5'-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) aniline)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Synthesis of compound (2) 2,2-bis(3-nitro-4-hydroxyphenyl)hexafluoropropane in the first step

[0043] Compound (1) 4,4'-(hexafluoroisopropylidene)diphenol (130g, 0.387mol, 1eq) was added to 930mL of glacial acetic acid (975g, 16.24mol, 42eq), after the raw material was dissolved, the The reaction system was heated to 28°C-29°C, generally 29°C, which is the temperature at which the pilot reaction was initiated, and nitric acid (85.3g, 1.353mol, 3.5eq) was added. In order to reduce the risk factor of the reaction and initiate the reaction first, the dropping process of nitric acid includes at least two stages; in the first stage, 5%-10% of the total amount of nitric acid is first added dropwise to the solution to initiate the reaction, that is, about 9g is added dropwise. When nitric acid is used, the temperature of the reaction solution starts to rise slowly, and no longer rises after reaching 32°C. Then, in the second stage, the remaining nitric acid is continued to be...

example 2

[0054] Synthesis of compound (2) 2,2-bis(3-nitro-4-hydroxyphenyl)hexafluoropropane in the first step

[0055] Compound (1) 4,4'-(hexafluoroisopropylidene)diphenol (130g, 0.387mol, 1eq) was added to 930mL of glacial acetic acid (975g, 16.24mol, 42eq), after the raw material was dissolved, the The reaction system was heated to 29° C., and nitric acid (48.7 g, 0.773 mol, 2.0 eq) was added in batches. When the first batch of about 4.87g was added dropwise, the temperature of the reaction solution began to rise slowly, and the temperature stopped rising after reaching 32°C. The second batch of nitric acid continued to be added dropwise, and the temperature of the reaction solution rose slightly during the dropwise addition, up to 34°C. After the dropwise addition, the reaction process was monitored by LCMS and HPLC, and the reaction was carried out when the reaction time was about 2.5 hours. The reaction solution was poured into 2 times the volume of ice water, a large amount of s...

Embodiment 3

[0061] The difference between embodiment 3, embodiment 4 and embodiment 1 is only that compound (1) 4,4'-(hexafluoroisopropylidene) diphenol and nitric acid react with different substance ratios; embodiment 5, embodiment The difference between 6 and Example 1 is only that compound (2) 2,2-bis(3-nitro-4-hydroxyphenyl) hexafluoropropane reacts with 3-bromopropene in different molar ratios; embodiment 7, The only difference between Example 8 and Example 1 is that compound (3) 5,5'-(perfluoropropane-2,2-diyl)bis(2-(allyloxy)nitrobenzene) and ammonium chloride The molar ratio of the reacted substances is different; the difference between embodiment 9, embodiment 10 and embodiment 1 is only that compound (3) 5,5'-(perfluoropropane-2,2-diyl)bis(2-(ene Propoxy) nitrobenzene) reacts with iron powder in different molar ratios; the target products obtained in each embodiment are shown in Table 1 below.

[0062] Table 1 prepares the reaction conditions and product yield of compound (4) ...

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Abstract

The invention provides a preparation method of 5, 5'-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) aniline), and relates to the technical field of synthesis of chemical intermediates. The preparation method comprises the steps of dissolving 4, 4 '-(hexafluoroisopropylidene) diphenol in glacial acetic acid and nitric acid, reacting to obtain 2, 2-bis (3-nitro-4-hydroxyphenyl) hexafluoropropane, dissolving the product in acetonitrile, adding potassium carbonate and 3-bromopropylene, and reacting to obtain 5, 5'-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) nitrobenzene); and reacting 5, 5 '-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) nitrobenzene), iron powder and ammonium chloride to obtain 5, 5'-(perfluoropropane-2, 2-diyl) bis (2-(allyloxy) aniline). The synthetic route is mild in reaction condition, simple in reaction and post-treatment process operation, low in reaction danger coefficient, low in production cost and suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the technical field of chemical intermediate synthesis, in particular to a preparation method of 5,5'-(perfluoropropane-2,2-diyl)bis(2-(allyloxy)aniline). Background technique [0002] 5,5'-(perfluoropropane-2,2-diyl)bis(2-(allyloxy)aniline) is an important organic synthesis intermediate with broad application prospects, mainly used in the production of epoxy resins Crosslinking agent, which can undergo Claisen rearrangement under high temperature or catalyst conditions to form diallyl bisphenol, which is used in high-end application technologies, including adhesives on the surface of semiconductor wafers, photoresist materials, and impact-resistant prepregs , Forming of fiber-reinforced structural parts, mixed materials for high temperature and chemical corrosion resistance, high temperature coating, waterproof, anti-corrosion, etc. The synthesis of this compound in the prior art has the disadvantages of harsh reaction condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C201/08C07C205/26C07C201/12C07C205/37C07C213/02C07C217/84
CPCC07C201/08C07C201/12C07C213/02C07C205/26C07C205/37C07C217/84
Inventor 郦荣浩陈红星王治国罗春艳
Owner 上海毕得医药科技股份有限公司
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