N,N-bis(3-aminopropyl)methylamine → 5.5'-[(Methylimino)bis(propane-3,1-diylimino)]bis(2-methyl-1,3-benzothiazole-4,7-dione)

Participants

Reaction Conditions

Reaction Steps

83.4 mg (0.57 mmol; 0.6 equivalents) of N-(3-aminopropyl)-N-methylpropane-1,3-diamine are added to 200 mg (0.95 mmol) of 5-methoxy-2-methyl-4,7-dioxobenzothiazole in solution in 15 ml of anhydrous ethanol. The reaction mixture is stirred at 60° C. for 2 hours, then the solvent is evaporated off under reduced pressure. The residue is purified on a silica column (eluent: methanol at 3% in dichloromethane) and 30 mg (yield=36%) of expected product is obtained in the form of a red powder. Melting point: 94-96° C.

Provenance & Evidence