Methanamine, N-methoxy-, hydrochloride (1:1) → N-methoxy-N,1-dimethyl-1H-pyrazole-5-carboxamide

Beteiligte Stoffe

Reaktionsschritte

N,O-dimethylhydroxylamine hydrochloride (1.30 g) was added to an dimethylformamide (32 mL) solution that contained 1-methyl-1H-pyrazol-5-carboxylic acid (1.21 g), O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (4.38 g) and diisopropylethylamine (3.34 mL) at a room temperature, and the obtained solution was then stirred for 2 hours. Thereafter, water was added to the reaction solution, and the obtained mixture was then extracted with ethyl acetate. The organic layer was washed with water and a saturated saline, and was then dried over anhydrous magnesium sulfate, followed by vacuum concentration. The residue was purified by column chromatography (silica gel cartridge, chloroform:methanol=100:0 to 95:5), so as to obtain the title compound (1.03 g) in the form of a yellow oily substance.

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