Water → (S)-1-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)-1H-pyrazol-3-amine

Participants

Reaction Steps

To a solution of 1H-pyrazol-3-amine in DMSO (15 mL) was added potassium hydroxide (3.18 g) at room temperature. After stirring at room temperature for 30 minutes, to the reaction mixture was added a solution of (R)-(+)-4-chloromethyl-2,2-dimethyl-1,3-dioxolane (3.0 g) in DMSO (10 mL), followed by stirring at room temperature for 3 days. To the reaction mixture was added water, followed by extraction with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate and concentrated. The obtained crude product was purified by basic silica gel column chromatography (hexane:ethyl acetate=1:1-1:3) to obtain 1-{[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]methyl}-1H-pyrazol-3-amine (1.0 g) as a pale violet oily substance.

Provenance & Evidence