Production process of N-(N-cyclohexylamide-N', N'-dmethyl amidine)-N-methyl ethyl carbamate

A technology of ethyl methyl carbamate and cyclohexyl amide is applied in the field of production technology of N--N-methyl carbamate, can solve the problems of complex production technology, high production cost, complicated operation, etc. Less process, safe production, simple preparation effect

Inactive Publication Date: 2017-02-08
宿迁市万和泰化工有限公司
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Problems solved by technology

[0002] Triazine herbicides mainly use D1 protein as the target of photosynthetic system Ⅱ (PSⅡ) to inhibit the photosynthesis of plants and play a big role in agriculture. Among them, N-(N-cyclohexylamide-N', N'-dimethylamidine)-N-methylcarbamate is an intermediate of triazine herbicides, which plays a very important role in making triazine herbicides, but the existing N-( The production process of N-cyclohexylamide-N',N'-dimethylamidine)-N-methyl urethane The production process is relatively complicated, the operation is cumbersome, the production cost is high, and the efficiency is low.

Method used

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Embodiment

[0020] A kind of production technology of N-(N-cyclohexylamide-N ', N'-dimethylamidine)-N-methyl urethane, it is characterized in that, described production technology comprises the following steps:

[0021] ⑴Condensation section

[0022] Put 30% cyanamide solution and catalyst TEBA (benzyltriethylammonium chloride) into the condensation reaction kettle I, and add the metered ethyl chloroformate and liquid caustic dropwise while stirring, at 20°C-25°C , pH = 6-7 conditions, the reaction produces N-cyanocarbamate sodium salt; after the reaction, the feed liquid is transferred to the condensation reaction kettle II, and the jacket is heated by steam to a certain temperature between 50-70°C , then add dropwise the measured dimethyl sulfate, liquid caustic soda and water, and keep warm for 2 hours; N-cyanocarbamate sodium salt reacts with dimethyl sulfate to generate intermediate I and sodium sulfate; , the oil layer is intermediate I as a raw material for the synthesis section, ...

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Abstract

The invention relates to a production process of N-(N-cyclohexylamide-N', N'-dmethyl amidine)-N-methyl ethyl carbamate. The process consists of: taking cyanamide, ethyl chloroformate, dimethyl sulfate, dimethylamine, cyclohexyl isocyanate and the like are adopted as the main raw materials, and carrying out condensation, synthesis, alkaline hydrolysis, synthesis and other reactions so as to obtain N-(N-cyclohexylamide-N', N'-dmethyl amidine)-N-methyl ethyl carbamate. With yield up to 85%, the production process has the advantages of short technological process, simple preparation, production safety and good prospects, and is suitable for large-scale plant production.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a production process of N-(N-cyclohexylamide-N',N'-dimethylamidine)-N-methylurethane. Background technique [0002] Triazine herbicides mainly use D1 protein as the target of photosynthetic system Ⅱ (PSⅡ) to inhibit the photosynthesis of plants and play a big role in agriculture. Among them, N-(N-cyclohexylamide-N', N'-dimethylamidine)-N-methylcarbamate is an intermediate of triazine herbicides, which plays a very important role in making triazine herbicides, but the existing N-( The production process of N-cyclohexylamide-N', N'-dimethylamidine)-N-methyl urethane is relatively complex, cumbersome to operate, high in production cost, and low in efficiency. Contents of the invention [0003] The present invention provides a kind of N-(N-cyclohexyl amide-N', N'-dimethylamidine)-N-methyl urethane production technology for solving above-mentioned deficiency, makes its t...

Claims

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Application Information

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IPC IPC(8): C07C257/20
CPCC07C257/20C07C253/30C07C257/10C07C255/63
Inventor 张正荣张辉吴广磊
Owner 宿迁市万和泰化工有限公司
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