Dicyclohexylcarbodiimide → HCID 178505335, compound

Participants

Reaction Steps

To 2.9 g of 5-(p-guanidinophenylethyl)-furan-2-carboxylic acid methanesulfonate, 2.2 g of 6-amidino-2-naphthol methanesulfonate and 1.9 g of DCC was added 15 ml of anhydrous pyridine. The reaction mixture was stirred overnight at room temperature. The insolubles were filtered off and the filtrate was added to 100 ml of ethyl ether with stirring. Decantation is conducted to remove the ethyl ether. After repeating the procedure several times, the filtrate was dissolved in a small amount of methanol and the resulting solution was added to a saturated aqueous sodium hydrogencarbonate solution while stirring. The insolubles which were precipitated were collected by filtration and washed with water and acetone. The precipitate was suspended in a small amount of methanol and methanesulfonic acid was added to the resulting suspension. The insolubles were filtered off and the filtrate was added with stirring to 100 ml of ethyl ether. The ethyl ether was removed by decantation. After repeating the procedure several times, acetone was added to the filtrate. The mixture was stirred and decanted to remove the acetone. To the resulting mixture was added a small amount of ethanol and isopropanol and stirred. A pale yellow solid which was precipitated was collected by filtration to give 2.5 g of 6-amidino-2-naphthyl 5-(p-guanidinophenylethyl)-furan-2-carboxylate dimethanesulfonate.

Provenance & Evidence