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Method for synthesizing beta-piperidinol

A technology of piperidinyl alcohol and synthesis method, applied in the direction of organic chemistry, which can solve the problems of few product varieties and limited application coverage, and achieve the effect of inhibiting corrosion and improving the performance of anodic polarization

Active Publication Date: 2014-09-10
山东蓝盟防腐科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with advanced countries, China's vapor phase antirust technology still has the problems of fewer product varieties and limited application coverage. Therefore, it is necessary to increase the promotion of advanced technologies and at the same time strengthen the research and development of vapor phase antirust agents.

Method used

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  • Method for synthesizing beta-piperidinol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In a four-necked flask equipped with a stirring device, a reflux condensing device, and a thermometer, add 85 grams of toluene, 9.5 grams of zinc chloride and 34 grams of piperidine, and slowly add 20.9 grams of propylene oxide under stirring conditions, at 90 ° C ~ Reflux reaction at 95°C for 9 hours to generate β-piperidinyl alcohol. After the reaction was completed, the solvent and unreacted substances were distilled off under reduced pressure, and the product was purified by gel chromatographic column, using acetone- Elution was carried out twice with ethyl acetate to obtain β-piperidinyl alcohol as a colorless liquid.

Embodiment 2

[0015] In a four-neck flask equipped with a stirring device, a reflux condensing device, and a thermometer, add 74 grams of toluene, 9 grams of zinc chloride and 37 grams of piperidine, and slowly add 29.8 grams of butylene oxide under stirring conditions, at 95 ° C Reflux reaction at ~100°C for 10 hours to generate β-piperidinyl alcohol. After the reaction was completed, the solvent and unreacted substances were distilled off under reduced pressure, and the product was purified by gel chromatography, using acetone with a volume ratio of 40:60 -Ethyl acetate was eluted twice to obtain β-piperidinyl alcohol as a colorless liquid.

Embodiment 3

[0017] In a four-neck flask equipped with a stirring device, a reflux condensing device, and a thermometer, add 93 grams of toluene, 9.9 grams of zinc chloride and 31 grams of piperidine, and slowly add 21 grams of propylene oxide under stirring conditions, at 90 ° C ~ Reflux reaction at 100°C for 8 hours to generate β-piperidinyl alcohol. After the reaction was completed, the solvent and unreacted substances were distilled off under reduced pressure, and the product was purified by gel chromatographic column, using acetone- Ethyl acetate was eluted three times to obtain β-piperidinyl alcohol as a colorless liquid.

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Abstract

The invention discloses a method for synthesizing beta-piperidinol. Piperidine and epoxyalkane are adopted to undergo a reaction, ring opening of epoxyalkane is controlled by adding a catalyst zinc chloride, and the reaction is allowed to be easily carried out. The synthetic product has multiple active adsorption centers, can improve the anode polarization performance, inhibits corrosion, and belongs to an anodic type corrosion inhibitor.

Description

technical field [0001] The invention relates to the technical field of antirust additive synthesis, in particular to a synthesis method of β-piperidinyl alcohol. Background technique [0002] Vapor-phase anti-rust is a science that uses gas-phase corrosion inhibitor technology for corrosion protection. Vapor-phase corrosion inhibitors can continuously and slowly gasify at room temperature, and the volatilized corrosion-inhibiting gas is adsorbed on the bare metal surface to form one or two molecules Thick and stable protective film, which can effectively prevent the corrosion of metal by oxygen, moisture and other ambient atmospheres. Since the vapor phase corrosion inhibitor is continuously volatilized, it can always be in a "saturated" state in a closed space, so it can achieve long-term, Stable and excellent anti-rust effect. At present, the main application forms of gas-phase anti-rust products are: spraying gas-phase corrosion inhibitor powder directly on the surface o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D295/088C23F11/02
CPCC07D295/088C23F11/02
Inventor 修建东刘方旭
Owner 山东蓝盟防腐科技股份有限公司
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