Hydrochloric Acid → (4-nitro-1H-pyrazol-1-yl)acetaldehyde

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-(2,2-dimethoxyethyl)-4-nitro-1H-pyrazole (2.65 g, 13.2 mmol) in THF (34 mL), a 2N aq. HCl-solution (60 mL, 120 mmol) was added dropwise. After stirring at 80° C. for 2 h, the reaction mixture was allowed to reach rt and freeze-dried overnight to yield 2-(4-nitro-1H-pyrazol-1-yl)acetaldehyde which was used as an yellow oil in the next step without further purification. LC-MS conditions B: tR=0.24 min, [M+H]+=no ionization.

Provenance & Evidence