Pyridine → HCID 178511919, compound

Participants

Reaction Steps

30 Milliliters of 20% hydrous pyridine was added to 1.2 g of 4-[(3-morpholinopropyl)aminoiminomethylamino]benzioc acid.dihydrochloride, 1.79 g of 6-amidino-1-carbamoylmethyl-2-naphthol.hydrochloride, 1.06 g of DCC and 52.4 mg of DMAP, followed by stirring for 2 hours under cooling with ice and then 48 hours at room temperature. The precipitate was filtered and the filtrate was concentrated under reduced pressure. To the residue was added 30 ml of DMF, and the solution was added dropwise to a mixed liquid of 300 ml of acetone and 100 ml of ether, followed by stirring for 24 hours under cooling with ice. Then, the precipitate was collected by filtration to obtain a crude product. Then, the product was subjected to silica gel column chromatography using methyl ethyl ketone-water-formic acid (80:15:5) as an eluent, and the desired fractions were collected and the solvent was distilled off under reduced pressure. To the residue were added 30 ml of methanol and 792 μl of concentrated hydrochloric acid, and the solution was added dropwise to 400 ml of acetone, followed by stirring for 24 hours under cooling with ice. Then, the precipitate was collected by filtration to obtain 1.07 g of the desired product.

Provenance & Evidence