Sodium hydride → rac-ethyl (1R,2R)-2-(4-methoxyphenyl)cyclopropane-1-carboxylate

Beteiligte Stoffe

Reaktionsschritte

Trimethylsulfoxonium iodide (14.15 g, 63 mmol) is suspended in dry dimethylsulfoxide (126 mL) and sodium hydride (60% in mineral oil, 2.52 g, 63 mmol) is added. The mixture is stirred for 40 minutes and then a solution of 4-methoxycinnamic acid ethyl ester (5 g, 24.2 mmol) in dry dimethylsulfoxide (64 mL) is added and the mixture stirred for 3 hours at room temperature. The mixture is diluted with water and extracted with ethyl acetate, the organic phase is dried by passing through a phase separator and the solvent is removed under vacuum. The residue is purified by flash chromatography (10% ethyl acetate in cyclohexane) to give the title compound (yield 1.43 g). LC (METHOD 11): tR=7.74 min; Mass spectrum (ESI+): m/z=221 [M+H]+.

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