Reference of 89607-15-8, 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. 89607-15-8 name is 3-Bromo-1-methyl-4-nitro-1H-pyrazole, 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 5: Into a 100 mL round bottom flask containing a solution of 3-bromo-1-methyl-4-nitro-1H-pyrazole (1.0 g) in ethyl acetate (50 mL) at room temperature was added Raney Nickel (700mg) and the reaction mixture was stirred at room temperature for 16 h under hydrogen atmosphere. The reaction mixture was filtered through celite and washed with ethyl acetate. The filtrate was concentrated under reduced pressure and purified by flash chromatography eluting with ethyl acetate in petroleum ether (40-50%) to afford 3-bromo-1-methyl-1H-pyrazol- 4-amine as a liquid. ?H NMR (CD3OD, 400 MHz): 7.18 (s, 1H), 3.77 (s, 3H). MS calc?d[M+Hj 176.0, found 176.2.
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-Bromo-1-methyl-4-nitro-1H-pyrazole, and friends who are interested can also refer to it.