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Process for synthesis of 1-sodium methyl cyclopropene and products thereof

A technology of sodium methylcyclopropene and a synthesis method, applied in directions such as sodium organic compounds, can solve problems such as unstable production costs of products, and achieve the effects of being suitable for large-scale preparation, less equipment investment, and easy to operate

Inactive Publication Date: 2006-01-18
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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Problems solved by technology

[0006] Technical problem The present invention aims at the synthesis method reported in the literature and the production method of Rohm and Haas, or there are shortcomings such as unstable products or high production costs. Another way is to use sodium amide to synthesize sodium 1-methylcyclopropene, and the product encounters fruit in use. The water produced by respiration reacts to obtain a methylcyclopropene that can effectively inhibit the synthesis of ethylene in fruits

Method used

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Examples

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Embodiment Construction

[0020] Instruments: high-purity nitrogen cylinder, mechanical stirrer, constant pressure dropping funnel, 3L three-neck round bottom flask.

[0021] Drugs and reagents: 90% sodium amide 3-chloro-2-methylpropene white oil (reagent grade)

[0022] The synthetic method of MCP: at room temperature (25 ℃ optimal), the 2L three-neck round-bottomed flask equipped with mechanical stirring and constant pressure dropping funnel was filled with N 2 Rinse fully, then keep the N in the bottle 2 Under positive pressure, quickly add sodium amide (90% NaNH 2 , 100g) and white oil (1200mL). Start stirring, start to drop 3-chloro-2-methylpropene (180g) into the flask, the dropping speed is controlled at about 1d / s, after the dropwise addition, continue to stir for 2-3 hours. At this time, a yellow powdery solid precipitated out. Let it stand for a while, filter it quickly in a dry environment, and drain it. The solid obtained is sieved with a 60 mesh sieve to remove unreacted sodium amide ...

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Abstract

The present invention belongs to the field of chemical synthesis technology, and is synthesis and product of 1-methyl cyclopropenyl sodium as the precursor of novel preservative 1-methyl cyclopropene and used in developing efficient and low-toxic fruit and vegetable preservative. The present invention synthesizes 1-methyl cyclopropenyl sodium with amino sodium. During use, 1-methyl cyclopropenyl sodium reacts with water produced in the breathe of fruits to produce 1-methyl cyclopropene capable of inhibiting the synthesis of ethylene of fruits. The synthesis process of the present invention is simple and suitable for industrial production, and has low cost and no environmental pollution.

Description

(1) Technical field [0001] The method for synthesizing 1-methylcyclopropene sodium (MCP-Na) of the invention belongs to the technical field of chemical synthesis. It is specially used for the preparation of the precursor of the new antistaling agent 1-methylcyclopropene and the development of high-efficiency and low-toxicity fruit and vegetable preservatives. (2) Background technology [0002] 1-Methylcyclopropene (1-MCP), an extremely advanced fresh-keeping agent for fruits and vegetables in the world, has an excellent fresh-keeping effect on most climacteric fruits and vegetables. It delays the decay of fruit and vegetable tissues by blocking the formation of ethylene inside the fruits and vegetables. And it can inhibit the activity of some enzymes to reduce the respiratory intensity, so as to achieve the effect of prolonging the storage and preservation of fruits and vegetables. It has the characteristics of non-toxicity, high efficiency and convenient use. It is a new ty...

Claims

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Application Information

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IPC IPC(8): C07F1/04
Inventor 宋宏峰陈晓强颜志梅俞明亮马瑞娟余刚
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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