68890-66-4Relevant articles and documents
Preparation process of pyridinone ethanol amine salt
-
Paragraph 0049; 0051; 0060; 0061; 0064; 0073-0074; 0077-0087, (2021/01/25)
The invention relates to the technical field of pyridone ethanol amine salt processing, and particularly discloses a pyridone ethanol amine salt preparation process, which comprises: carrying out an acylation reaction, a ring-closure reaction, a hydroxyamination reaction and a salt forming reaction on 3,3-dimethyl acrylate and isononyl chloride to obtain pyridone ethanol amine salt; wherein the acylation reaction is carried out in the presence of a supported catalyst, the supported catalyst comprises an active component and a carrier, the carrier is silica gel, the active component comprises anhydrous aluminum chloride, anhydrous lanthanum chloride and anhydrous lithium perchlorate, and the loading capacity of anhydrous aluminum chloride on the carrier is 7-11 wt%; the loading capacity ofanhydrous lanthanum chloride on the carrier is 3-5 wt%; and the loading capacity of anhydrous lithium perchlorate on the carrier is 0.8-1.5 wt%. According to the preparation process of pyridinone ethanol amine salt, the catalytic Friedel-Crafts acylation reaction is realized, the supported catalyst is convenient to recover, and the activity and selectivity of the supported catalyst are improved.
Preparation method of pyridinone ethanolamine salt
-
Paragraph 0050-0051; 0054; 0056; 0059; 0061; 0064; 0066, (2020/03/05)
The invention discloses a preparation method of a pyridinone ethanolamine salt. The preparation method comprises the reaction steps of Friedel-Crafts acylation, ring closing, hydroxyamination, salification and the like. According to the preparation method, the pyridinone ethanolamine salt can be efficiently prepared under mild conditions, less reaction materials are consumed, the yield and purityof products obtained in the steps are high, and complex purification steps are not needed.
PROCESS FOR FORMING 2-HYDROXYPYRIDINE-1-OXIDE OR DERIVATIVES THEREOF
-
Page/Page column 88; 89, (2019/12/25)
A process for forming 2-hydroxypyridine-1 -oxide or derivatives thereof, the process comprising inter alia providing a solution comprising at least one compound according to Formula (1) (I) and recovering a compound according to Formula (2) (2) Also related products, uses, methods and compositions.