Dimethylformamide → HCID 69331778, compound

Participants

Reaction Steps

To a solution of 5-(hydroxyl)phenyl-1-(4-methoxyphenyl)-4-methyl-3-(trifluoromethyl)-1H-pyrazole (5.0 g) and 2-bromoethoxy-tert-butyldimethylsilane (6.87 g) in DMF (100 ml) was added portionwise NaH (919 mg, 50% in oil) at room temperature. The reacion mixture was stirred overnight. The reaction mixture was quenched with water. Aqueouslayer was extracted twice with EtOAc. Combined organic layer was washed twice with water, and brine. Dried, filtered and evaporated under reduced pressure to give 5.29 g (73%) of 5-[4-(2-{[tert-butyl(dimethyl)silyl]oxy}-ethoxy)phenyl]-1-(4-methoxyphenyl)-4-methyl-3-(trifluoromethyl)-1-H-pyrazole.

Provenance & Evidence