Ammonia → HCID 136365320, compound

Participants

Reaction Conditions

Reaction Steps

Crude N-(aminoiminomethyl)-5,6,7,8-tetrahydro-11-chloro-10-methoxymethyloxy-8-oxo-4H-azocino[3,2,1-hi]indole-2-carboxamide was obtained by carrying out reaction according to the method described in Example 1, except for using ethyl 5,6,7,8-tetrahydro-11-chloro-10-methoxymethyloxy-8-oxo-4H-azocino[3,2,1-hi]indole-2-carboxylate (0.50 g, 1.36 mmol), guanidine hydrochloride (2.60 g, 27.2 mmol), sodium methoxide (1.47 g, 27.2 mmol) and N,N-dimethylformamide (50 ml). Subsequently, the crude product was added to a mixture of isopropanol (70 ml), water (20 ml) and methanesulfonic acid (0.50 g), and the resulting mixture was stirred at 65-70° C. for 6 hours. The reaction mixture was neutralized with 28% aqueous ammonia and extracted three times with ethyl acetate, and the extract solution was washed with a saturated aqueous sodium chloride solution and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure and the resulting residue was dissolved in tetrahydrofuran (70 ml), after which methanesulfonic acid (0.26 g) was added and the solid precipitated was collected by filtration. The solid collected was recrystallized from a mixture of isopropanol (1 ml) and water (20 ml) to obtain 0.25 g of N-(aminoiminomethyl)-5,6,7,8-tetrahydro-11-chloro-10-hydroxy-8-oxo-4H-azocino[3,2,1-hi]indole-2-carboxamide methanesulfonate.

Provenance & Evidence