Triethylamine → 4-[5-[1-[4-Cyano-3-(trifluoromethyl)phenyl]-2,5-dihydro-4-methyl-2,5-dioxo-1H-pyrrol-3-yl]pentyl]-N-[4-(dimethylamino)phenyl]piperazine-1-carboxamide

Participants

Reaction Steps

0.2 ml of a solution of triethylamine in tetrahydrofuran (1.5 mol/l) and 7 mg of 4-(dimethylamino)phenylisocyanate in 0.4 ml of tetrahydrofuran were added to a solution of 9 mg of 4-[2,5-dihydro-3-methyl-2,5-dioxo-4-[5-(piperazin-1-yl)pentyl]-1H-pyrrol-1-yl]-2-(trifluoromethyl)benzonitrile in 0.4 ml of tetrahydrofuran, and the mixture was stirred for 8 hours at room temperature. For working-up, the reaction mixture was diluted with ethyl acetate and washed with semi-saturated sodium bicarbonate solution. After the organic phase was concentrated by evaporation, it was chromatographed with methanol/dichloromethane on silica gel, and 3 mg of the title compound was thus obtained as a yellowish oil.

Provenance & Evidence