4-(((2-Aminoethyl)thio)methyl)-5-methylimidazole → 2-[2-(5-Methyl-4-imidazolylmethylthio)ethylamino]-5-(2-methoxy-4-pyridylmethyl)-4-pyrimidone

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Reaktionsschritte

An equimolar mixture of 2-nitroamino-5-(2-methoxy-4-pyridylmethyl)-4-pyrimidone and 2-(5-methyl-4-imidazolyl methylthio)ethylamine was heated under reflux in ethanol for 18 hours. The solid which crystallised out on cooling was recrystallised from methanol to give 2-[2-(5-methyl-4-imidazolylmethylthio)ethylamino]-5-(2-methoxy-4-pyridylmethyl)-4-pyrimidone, m.p. 177-178° in 51% yield. The latter compound was heated under reflux in 2N hydrogen chloride in ethanol for 24 hours and the mixture was evaporated to dryness. The residue was recrystallised from 2-propanol/ethanol containing hydrogen chloride to give 2-[2-(5-methyl-4-imidazolylmethylthio)ethylamino]-5-(2-hydroxy-4-pyridylmethyl)-4-pyrimidone trihydrochloride, m.p. 172-176°.

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