Water → 1-(4-chloro-3-methoxyphenyl)-3-[3-(1,1-dimethylethyl)-1H-pyrazol-1-yl]-2-pyrrolidinone

Beteiligte Stoffe

Reaktionsschritte

To a solution of 3-(1,1-dimethylethyl)-1H-pyrazole (0.22 g, 1.8 mmol) in N,N-dimethylformamide (20 mL) under nitrogen at room temperature was added 60% sodium hydride in mineral oil (79 mg, 2.0 mmol). After the addition, the mixture was stirred at room temperature for ˜15 minutes, and then 3-bromo-1-(4-chloro-3-methoxyphenyl)-2-pyrrolidinone (0.5 g, 1.6 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight and then poured into water (˜100 mL). The aqueous layer was extracted twice with ethyl acetate (˜50 mL each). The organic extracts were combined, washed twice with water (˜100 mL each), dried over MgSO4 and filtered. The filtrate was concentrated. The residue was purified by medium pressure liquid chromatography (silica gel) using as eluant methylene chloride and then 10:1 (by volume) ethyl acetatemethylene chloride to give the title compound, a compound of this invention, as a solid (186 mg) melting at 128–130 ° C.

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