tert-Butyl piperazine-1-carboxylate → HCID 10311729, compound

Participants

Reaction Steps

1.56 g of 1,1-dimethylethyl piperazine-1-carboxylate was added under a nitrogen atmosphere to a solution of 2.0 g of 4-[2,5-dihydro-3-(5-iodopentyl)-4-methyl-2,5-dioxo-1H-pyrrol-1-yl]-2-(trifluoromethyl)benzonitrile in 53 ml of tetrahydrofuran, and this mixture was stirred for 7 days at room temperature. For working-up, it was diluted with ethyl acetate and washed with semi-saturated sodium bicarbonate solution. After drying on sodium sulfate and concentration by evaporation, it was chromatographed with methanol/dichloromethane on silica gel, and thus 2.2 g of the title compound was obtained as a yellowish oil.

Provenance & Evidence