51219-00-2Relevant articles and documents
Compound herbicide based on dichloro quinolinic acid
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Paragraph 0021; 0031; 0039; 0041; 0049; 0051; 0059, (2021/11/21)
The invention discloses a compound herbicide based on quinclorac, which comprises 20 - 30 parts of quinclorac. Dichloromethane 3-8 parts, synergist 10 - 20 parts, wetting agent 1.5 - 4.5 parts, dispersing agent 1-3 parts, defoaming agent 0.5 - 2.5 parts and water 50 - 70 parts. The synergist inhibits the growth of cells by hindering the synthesis of the protein, and the sprouts of monocotyledonous plants are obtained through young buds of plants. The lower endoderm of the dicotyledonous plant is absorbed and conducted upwards, the seeds and roots absorb conduction, the absorption amount is low, the conduction speed is slow, the growth of young buds and roots is inhibited.
Method for asymmetric reductive amination of ketone based on fructose-derived pyridinol chiral ligand
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Paragraph 0087-0091, (2020/07/06)
The invention discloses a method for asymmetric reductive amination of ketone based on a fructose-derived pyridinol chiral ligand, which comprises the following steps: reacting a fructose-derived pyridinol chiral ligand with a metal iridium precursor to prepare a complex in situ as a catalyst, and carrying out direct asymmetric reductive amination on ketone and amine to prepare chiral amine. The ligand disclosed by the invention is simple to prepare, the catalyst dosage is low, the operation is simple and convenient, continuous operation can be realized, the method is suitable for large-scalepreparation of chiral amine, the enantiomeric excess value of the product reaches 70% or above, and the requirement of serving as a pesticide intermediate can be met. The method has a good result whenthe 2-ethyl-6-methylaniline/catalyst (S/C) is 10000 during synthesis of an s-metolachlor intermediate, the yield is 95%, the enantioselectivity is 75%, and the method has good industrial practicability.
Method for preparing chiral amine through asymmetric hydrogenation based on glucose-derived monodentate phosphite ligand
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Paragraph 0080-0084, (2020/07/06)
The invention discloses a method for preparing chiral amine through asymmetric hydrogenation based on a glucose-derived monodentate phosphite ligand. The method comprises the following steps: reactinga chiral glucose-derived monodentate phosphite ligand with a metal iridium precursor to prepare a complex in situ as a catalyst, and carrying out asymmetric hydrogenation on imine to prepare chiral amine. The proper catalyst dosage (by mole) is as follows: the raw material imine/catalyst (S/C) is equal to 100-500,000. The ligand disclosed by the invention is simple to prepare, the catalyst dosageis low, the operation is simple and convenient, continuous operation can be realized, the method is suitable for large-scale preparation of chiral amine, the enantiomeric excess (ee value) of the product reaches 70% or above, and the requirement of serving as a pesticide intermediate can be met. According to the method, a good result is obtained for synthesis of an s-metolachlor intermediate, andthe method has good industrial practicability.