反应详情

In a Parr shaker bottle was placed 1-(2-isopropoxy-ethyl)-3-nitro-1H-pyrazole (428 mg, 2.14 mmol), 10% palladium on activated carbon (50 mg) and ethanol (20 mL). The bottle was then placed on the Parr shaker at 50 psi of hydrogen pressure for 2 h. The reaction was then filtered through a pad of celite and washed with ethanol, concentration in vacuo afforded 1-(2-isopropoxy-ethyl)-1H-pyrazol-3-ylamine (360 mg, 99%) as a clear light yellow oil: ES-HRMS m/e calcd for C8H15N3 (M+H)+ 170.1288, observed 170.1287; 1H NMR (300 MHz, CDCl3) δ 1.10 (d, J=6.0 Hz, 6H, 2×CH3), 3.43 (br, 2 H, NH2), 3.49 (m, 1H, OCH), 3.70 (t, J=5.6 Hz, 2H, OCH2), 4.05 (t, J=5.6 Hz, 2H, NCH2), 5.57 (d, J=2.3 Hz, 1H, Ar), 7.22 (d, J=2.3 Hz, 1H, Ar).

1. filtrationThe reaction was then filtered through a pad of celite
2. washwashed with ethanol, concentration in vacuo