Category: 83-10-3

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 83-10-3 as follows. 83-10-3

To a suspension of 4-amino-5-chloro-2-fluorophenol (0.97 g, 6 mmol), 1,5- dimethyl-3-oxo-2-phenyl-2,3-dihydro-lH-pyrazole-4-carboxylic acid (1.42 g, 6.12 mmol) in DMF (20 mL) was added EDCI (0.38 mg, 7.2 mmol) and HOAT (0.16 g, 1.2 mmol). The reaction mixture was heated to 80 C and stirred for 24 hours, then cooled to 0 C, and diluted with H20 (200 mL) and EtOAc (2 mL) at 0 C. The resulted mixture was filtered to give the title compound as a light brown solid (1.2 g, 53.2%). MS (ESI, pos. ion) m/z: 376.1 [M+H]+; NMR (400 MHz, DMSO-i): delta 2.68 (s, 3H), 3.34 (s, 3H), 7.03 (d, J= 8.8 Hz, 1H), 7.41-7.43 (m, 2H), 7.48-7.52 (m, 1H), 7.56-7.60 (m, 2H), 8.31 (d, J= 13.8 Hz, 1H), 10.08 (s, 1H), 10.95 (s, 1H).

According to the analysis of related databases, 83-10-3, the application of this compound in the production field has become more and more popular.

83-10-3, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 83-10-3 name is 1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

Step 4) N-(2-chloro-5-fluoro-4-hydroxyphenyl)-1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxamide To a suspension of 4-amino-5-chloro-2-fluorophenol (0.97 g, 6 mmol) and 1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid (1.42 g, 6.12 mmol) in DMF (20 mL) was added EDCI (0.38 mg, 7.2 mmol) and HOAT (0.16 g, 1.2 mmol). The mixture was allowed to warm up to 80 C. and stirred for 24 hours. Then H2O (200 mL) and EtOAc (2 mL) was added. The resulted mixture was stirred at 0 C. for 2 hours, then filtered to give the title compound as a light brown solid (1.2 g, 53.2%). MS (ESI, pos. ion) m/z: 376.1 [M+H]+; 1H NMR (400 MHz, DMSO-d6): delta (ppm) 2.68 (s, 3H), 3.34 (s, 3H), 7.02-7.04 (d, J=8.8 Hz, 1H), 7.41-7.43 (m, 2H), 7.48-7.52 (m, 1H), 7.56-7.60 (m, 2H), 829-8.33 (d, J=13.8 Hz, 1H), 10.08 (s, 1H), 10.95 (s, 1H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid, and friends who are interested can also refer to it.