Dicyclohexylcarbodiimide → HCID 14772799, compound

Participants

Reaction Steps

To a solution of 2-(3-pyridyl)thiazolidine-4-caroxylic acid 2.1 g, 1-(pyrrolidinecarbonylmethyl)piperazine 1.8 g, 1-hydroxybenzotriazole 1.5 g and N,N-dimethylformamide 50 ml was added dicyclohexylcarbodiimide 2 g under ice-cooling, and the mixture was stirred overnight at room temperature. The resultant dicyclohexylurea was filtered off and the filtrate concentrated under reduced pressure. To the residue were added ethyl acetate 100 ml and water 10 ml, the mixture was basified by addition of sodium carbonate, sodium chloride added until saturation and allowed to stand. The organic layer was separated, washed with saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography and eluted with a mixture solution of ethyl acetate -methanol (6:4) to give 2.1 g of 1-[2-(3-pyridyl)thiazolidine-4-ylcarbonyl]-4-[1-(pyrrolidinyl)carbonylmethyl]piperazine.

Provenance & Evidence