Dimethylformamide → HCID 14999135, compound

Participants

Reaction Steps

A 7.17 g portion of carbobenzyloxy glycyl-L-phenylalanine and 2.30 g of N-hydroxysuccinimide were slurried in 100 ml of acetonitrile, cooled in an ice bath, with the addition of 5 ml of dimethylformamide, to obtain solution. A precooled solution of 4.12 g of dicyclohexylcarbodiimide in 50 ml of acetonitrile was added dropwise. The mixture was stirred in the ice bath for 2 hours, then refrigerated overnight, filtered and the filtrate concentrated in vacuo. The residue was taken up in 125 ml of ethyl acetate, washed with precooled 5% aqueous sodium bicarbonate, then twice with water, dried and concentrated in vacuo. The residue was dissolved in 125 ml of 2-propanol and refrigerated overnight. The resulting gum was taken up in tetrahydrofuran and concentrated in vacuo, giving 6.5 g of 1-[[N-[N-[(phenylmethoxy)carbonyl]glycyl]-L-phenylalanyl]oxy]-2,5-pyrrolidinedione.

Provenance & Evidence