Reference of 956951-01-2, 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. 956951-01-2 name is 3-Nitro-1H-pyrazole-1-ethanol, 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.
A solution 2-(3-nitro-pyrazol-1-yl)-ethanol (3.46 g, 22.02 mmol) in ethanol (40 mL) was placed in a Parr shaker bottle and treated with 10% palladium on carbon (350 mg). The bottle was then put on the Parr shaker and charged with hydrogen to 50 psi and let shake for 1 h. After this time, the reaction mixture was filtered through celite and the celite washed with ethanol. The filtrate was then concentrated in vacuo and azeotroped with acetonitrile and then chloroform to afford 2-(3-amino-pyrazol-1-yl)-ethanol (3.02 g, >quant.) as a light yellow viscous oil: 1H NMR (300 MHz, DMSO-d6 delta ppm 7.26 (d, J=1.83 Hz, 1H), 5.34 (d, J=2.20 Hz, 1H), 4.76 (t, J=5.31 Hz, 1H), 4.50 (s, 2H), 3.78-3.88 (m, 2H), 3.62 (q, J=5.74 Hz, 2H).
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-Nitro-1H-pyrazole-1-ethanol, and friends who are interested can also refer to it.