Methanesulfonic Acid → HCID 136365309, compound

Participants

Reaction Steps

A mixture of the N-(aminoiminomethyl)-1,3,4,5-tetrahydro-5-hydroxy-benz[cd]indole-2-carboxamide methanesulfonate (0.13 g, 0.37 mmol) obtained in Example 7, methanesulfonic acid (0.036 g, 0.37 mmol) and methanol (20 ml) was heated under reflux for 2 hours. Subsequently, the reaction mixture was concentrated to a volume of about 5 ml under reduced pressure and a 5% aqueous sodium chloride solution was added to the residue. The resulting mixture was made basic with 28% aqueous ammonia and extracted twice with ethyl acetate, and the extract solution was washed twice with a 5% aqueous sodium chloride solution and then dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure and the residue was purified by a silica gel column chromatography (eluent: chloroform/methanol=96/4) to obtain N-(aminoiminomethyl)-1,3,4,5-tetrahydro-5-methoxy-benz[cd]indole -2-carboxamide (0.11 g). This compound (0.11 g) was treated with a solution of methanesulfonic acid (0.05 g) in tetrahydrofuran (2.5 ml) to obtain N-(aminoimino-methyl)-1,3,4,5-tetrahydro-5-methoxy-benz[cd]indole-2-carboxamide methanesulfonate (0.08 g).

Provenance & Evidence