In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 1202993-11-0, name is 5-Chloro-3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. Product Details of 1202993-11-0
Step 2 : preparation of of 5-chloro-3-(difluoromethyl)-1-methyl-1 H-pyrazole-4-carbonyl chloride (lllb-1 ) 3.2 g of 5-chloro-3-(difluoromethyl)-1-methyl-1 H-pyrazole-4-carboxylic acid and 44.3 ml of thionyl chloride are refluxed for 5 hours. After cooling down, the reaction mixture is evaporated under vacuum to yield 3.5 g of 5-chloro-3-(difluoromethyl)-1-methyl-1 H-pyrazole-4-carbonyl chloride as a yellow oil. H NMR (400 MHz, CHCI3-c/6) delta ppm : 3.97 (s, 3H); 7.00 (t, J = 52.01 Hz, 1 H); IR (TQ) : 1759 and 1725 cm”1 (C=0).
The synthetic route of 1202993-11-0 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; BAYER CROPSCIENCE AG; BENTING, Juergen; COQUERON, Pierre-Yves; CRISTAU, Pierre; DAHMEN, Peter; DESBORDES, Philippe; GARY, Stephanie; GREUL, Joerg; HADANO, Hiroyuki; MEISSNER, Ruth; WACHENDORFF-NEUMANN, Ulrike; WO2011/151370; (2011); A1;,
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