Reference of 138786-86-4, 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. 138786-86-4 name is Methyl 4-nitro-1H-pyrazole-3-carboxylate, 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.
solution of methyl 4-nitro-lH-pyrazole-3-carboxylate (54.Og, 315.6 mmol), phenylboronic acid (77.Og,631.2 mmol), copper(II) acetate (86.0g, 473.4 mmol) and pyridine (49.9g, 631.2 mmol) in methylene chloride (600 mL) was stirred at ambient temperature open to air for 48 hours. The reaction was evaporated in vacuo, diluted with 100OmL methylene chloride and filtered through a large plug of silica(washing with 2 liters methylene chloride). The solvent was evaporated in vacuo. 1H NMR (CDCl3) delta8.61 (s, IH), 7.73 (m, 2H), 7.50 (m, 3H), 4.02 (s, 3H).
At the same time, in my other blogs, there are other synthetic methods of this type of compound, Methyl 4-nitro-1H-pyrazole-3-carboxylate, and friends who are interested can also refer to it.