Triethylamine → 2-(Diaminomethyleneamino)-4-[6-(3-methylureido)methylpyridin-2-yl]thiazole

Participants

Reaction Steps

Methyl isocyanate (0.24 ml) was added to a mixture of 4-(6-aminomethylpyridin-2-yl)-2-(diaminomethyleneamino)thiazole trihydrochloride (1.2 g) and triethylamine (1.4 ml) in a solution of tetrahydrofuran (18 ml) and methanol (6 ml) and the mixture was stirred at ambient temperature for 1 hour. To the mixture was added a mixture of ethyl acetate and water, and the mixture was adjusted to pH 9.5 with 20% aqueous potassium carbonate. The separated organic layer was dried over magnesium sulfate and evaporated to give 2-(diaminomethyleneamino)-4-[6-(3-methylureido)methylpyridin-2-yl]thiazole (0.92 g).

Provenance & Evidence