反应详情

A mixture of 23.87 g (100.0 mmol) of 1-(3,5-diamino-6-chloropyrazinoyl)imidazole and 58.51 g (300.0 mmol) of N-(2-aminoethyl)-N-propyl-1,2-ethanediamine in 250 ml of tetrahydrofuran was stirred at ambient temperature overnight. The solvent and excess triamine were evaporated and the residue chromatogaphed on silica gel (150 g) using 1.5:98.5 (v/v) methanol: tetrahydrofuran saturated with ammonia gas as eluent. There was obtained 24.64 g (78.0 mmol, 78%) of 3,5-diamino-N-[2-[(2-aminoethyl)propylamino]ethyl]-6-chloropyrazinecarboxamide as a yellow solid; mp 91°-94° C.

1. customThe solvent and excess triamine were evaporated