62806-48-8Relevant articles and documents
Preparation method of hexazinone intermediate guanidine compound and preparation method of hexazinone
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Paragraph 0069; 0071, (2020/10/21)
The invention provides a preparation method of a hexazinone intermediate guanidine compound. The preparation method comprises the following steps: in an environment with the temperature lower than theboiling point temperature of dimethylamine, dimethylamine reacts with carbon dioxide in a polar solvent to generate dimethylamine carbonate; ethyl N-cyano-N-methylaminoformate is added into the prepared dimethylamine carbonate, and a carbonate mixture solution of the hexazinone intermediate guanidine compound is generated through a reaction in the environment with the temperature being 0 DEG C orabove and being lower than the boiling point of the polar solvent; the polar solvent is removed from the prepared carbonate mixture solution of the guanidine compound, and drying is performed to obtain formate of the guanidine compound; and an inert solvent is added into the formate of the prepared guanidine compound, and decomposing is performed into the guanidine compound and carbon dioxide under the catalysis of an organic ammonia catalyst to prepare the hexazinone intermediate guanidine compound. The preparation method of the hexazinone intermediate guanidine compound does not generate wastewater, is safe and environment-friendly, and is simple and convenient to operate and high in guanidine compound yield.
Selective herbicide for pineapple crops
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, (2008/06/13)
1-Methyl-3-cyclohexyl-6-dimethylamino-s-triazine-2,4(1H,3H)-dione STR1 is useful for the selective control of many broadleaved and grassy weeds in pineapple crops.