(Trifluoromethyl)trimethylsilane → HCID 74222541, compound

Participants

Reaction Steps

430 mg of 8-[(2,6-difluorobenzyl)oxy]-2-methyl-N-[(2R)-1-oxohexan-2-yl]imidazo[1,2-a]pyridine-3-carboxamide (1.05 mmol) were initially charged in 30 ml of dry THF, and 194 μl of trimethylsilyl trifluoromethane (1.24 mmol) and 621 μl of tetrabutylammonium fluoride solution (1.0 M in THF; 0.62 mmol) were successively added dropwise at 0° C. The reaction mixture was slowly warmed to RT, and stirring was continued overnight. The mixture was then concentrated and the residue was taken up in ethyl acetate, washed with saturated aqueous sodium bicarbonate solution, dried, filtered and concentrated. Preparative HPLC separation (Method 9) afforded 41 mg of the target compound, which was once more purified by HPLC (Method 10). This gave 28.4 mg of the target compound. The diastereomer ratio was about 3:1 (1H NMR integration).

Provenance & Evidence