117724-63-7Relevant articles and documents
Synthesis and Insecticidal Activity of Novel Thiazole Acrylonitrile Derivatives
Cao, Shengwen,Liu, Aiping,Liu, Weidong,Liu, Xingping,Ren, Yeguo,Pei, Hui,Huang, Lu,Zheng, Xi,Huang, Mingzhi,Wu, Daoxin
, p. 3395 - 3402 (2017/11/21)
A series of novel thiazole acrylonitrile derivatives was designed and synthesized utilizing NC-510 as a precursor. Their structures were characterized by NMR spectrometry, MS, and elemental analysis. The results of bioassay indicated that some of these ti
Preparation method for 2-methyl-4-trifluoromethyl-5-febuxostat
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Paragraph 0029-0047, (2017/04/29)
The invention belongs to the technical field of fungicide pesticides production, and particularly relates to a preparation method of fungicide thiamethoxam cefuroxime amide intermediate2-methyl-4-trifluoromethyl-5-febuxostat. The method uses Chlorinated trifluoro ethyl acetoacetate and thioacetamide as the raw material, tripropylamine or tributylamine as acid-binding agent, after chaining, cyclization, hydrolysis and acidification to obtain the 2-methyl-4-trifluoromethyl-5-febuxostat. The present invention uses high boiling point organic alkali acid agent, to increase the stability of industrial production, to increase content, yield, and to lower the production cost, meanwhile the present invention simplifies production operation, prepares high content of 2-methyl-4-trifluoromethyl-5-febuxostat (>=95%); the yield is high (>=90%) (calculated by Chlorinated trifluoro ethyl acetoacetate ).
2-methyl-4-(trifluoromethyl) thiazol-5-carboxylic acid
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Paragraph 0035; 0036; 0037, (2016/11/21)
The invention discloses a method for preparing 2-methyl-4-(trifluoromethyl)thiazole-5-formyl acid. The method comprises the steps of synthesizing 2-bromo-trifluoro-ethyl acetoacetate and 2,2-dibromo-trifluoro-ethyl acetoacetate by reacting trifluoro ethyl acetoacetate with liquid bromine by using trifluoro ethyl acetoacetate as a raw material; then preparing ethyl acetoacetate of 2-methyl-4-(trifluoromethyl)thiazol-5-ethyl formate by reacting with an inert organic solvent solution of thioacetamide; and finally obtaining 2-methyl-4-(trifluoromethyl)thiazole-5-formyl acid by a hydrolysis reaction. The method has the advantages of novel raw materials and route, mild reaction conditions, simple operations, relatively high raw material conversion rate and product selectivity, convenient separation of target products, etc. The prepared 2-methyl-4-(trifluoromethyl)thiazole-5-formyl acid can be used for synthesizing a key intermediate of thiazole amide fungicides (thifluzamide).