Water → HCID 17989145, compound

Participants

Reaction Steps

6.18 g (20.83 mmol) of ethyl-3-[1-(3-chloro-2-methoxyphenyl)-cyclopropyl]-2-oxopropionate is dissolved in 33 ml of tetrahydrofuran and mixed with 3.55 g (24.99 mmol) of (trifluoromethyl)-trimethylsilane. After 51 mg of tetrabutylammonium fluoride is added, the batch is stirred overnight. The reaction mixture is diluted with methyl tert-butyl ether, washed once with water and then with brine. After the usual working-up, the residue is chromatographed on silica gel (mobile solvent: ethyl acetate/hexane). The isolated 5.65 g (66.4%) of the product is mixed in 76 ml of tetrahydrofuran with 4.34 g (13.75 mmol) of tetrabutylammonium fluoride and stirred for one hour at room temperature. After the reaction mixture is mixed with water, it is extracted with methyl tert-butyl ether. After the usual working-up, the residue is chromatographed on a Flashmaster. 2.39 g (47.4%) of the desired compound: ethyl-2-[1-(3-chloro-2-methoxyphenyl)-cyclopropylmethyl]-3,3,3-trifluoro-2-hydroxypropionate is isolated.

Provenance & Evidence