Sodium hydride → HCID 21959039, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 2-(4-fluoro-3-trifluoromethyl-phenyl)-3-(tetrahydro-pyran-2-yl)-propionic acid (5.20 g, 16.24 mmol) in dry N,N-dimethylformamide (90 mL) at 25° C. under argon was carefully treated with 95% sodium hydride (410 mg, 17.05 mmol). The reaction mixture was stirred at 25° C. for 30 min and then was treated with sodium thiomethoxide (2.40 g, 32.48 mmol). This mixture was heated at 100° C. for 4.5 h and then concentrated in vacuo to remove N,N-dimethylformamide. The residue was diluted with water (100 mL) and then was acidified to pH=2 using a 1N aqueous hydrochloric acid solution. The resulting aqueous layer was extracted with ethyl acetate (2×600 mL). The combined organic extracts were dried over sodium sulfate, filtered, and concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230-400 mesh, 98/2 chloroform/methanol to 9/1 chloroform/methanol) afforded 2-(4-methylsulfanyl-3-trifluoromethyl-phenyl)-3-(tetrahydro-pyran-2-yl)-propionic acid (5.70 g, 100%) as a yellow gum: EI-HRMS m/e calcd for C16H19F3O3S (M+Na)+ 371.0899. found 371.0902.

Provenance & Evidence