Water → (rac.) 4-(4-Chloro-3-fluoro-2-methoxyphenyl)-4-methyl-2-(trifluoromethyl)-2-hydroxy-pentanoic acid ethyl ester

Participants

Reaction Steps

4.71 g (10.26 mmol) of (rac.) 4-(4-chloro-3-fluoro-2-methoxyphenyl)-4-methyl-2-(trifluoromethyl)-2-trimethylsilyloxy-pentanoic acid ethyl ester is dissolved in 57 ml of tetrahydrofuran and mixed with 3.24 g (10.26 mmol) of tetrabutylammonium fluoride: after stirring over the weekend at room temperature, the reaction mixture is mixed with water and extracted three times with methyl tert-butyl ether. The combined organic extracts are washed with brine. After the drying, the solvent is spun off, and the remaining residue is chromatographed on silica gel (mobile solvent:ethyl acetate/hexane). 3.07 g (77.4%) of the desired compound is isolated.

Provenance & Evidence