Introduction of a new synthetic route about 3-Bromo-1H-pyrazole

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-Bromo-1H-pyrazole, and friends who are interested can also refer to it.

14521-80-3, 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. 14521-80-3 name is 3-Bromo-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 1: To 3-bromopyrazole (1.0 g, 6.81 mmol) under ice bathSodium hydrogen (545 mg, 13 ¡¤ 6 mmol, 60%) was added in portions to a solution of tetrahydrofuran (15 mL).And stirring at this temperature for 0.5 hours, followed by dropwise addition of 2-(trimethylsilyl)ethoxymethyl chloride (1.36 g, 8.16 mmol).Stir at room temperature overnight. The reaction was quenched by the addition of water (10 mL).The organic phase was dried over anhydrous sodium sulfate and concentrated.The residue was flash chromatographed (petroleum ether / ethyl acetate = 1/1)Purification afforded 3-bromo-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazole (1.2 g, yield: 64%) it is a yellow oil.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-Bromo-1H-pyrazole, and friends who are interested can also refer to it.