Methyl iodide → Methyl 3-methyl-4-oxo-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazine-8-carbimidothioate hydroiodide

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Reaction Steps

A solution of 3-methyl-4-oxo-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazine-8-carbothioamide (2.75 g, 13.1 mmol) and methyl iodide (8.2 mL, 131 mmol) in acetonitrile (900 mL) was stirred at room temperature for 3 days. The mixture was concentrated under vacuum and the solid was suspended in diethyl ether. The precipitate was filtered and washed with diethyl ether to give the pure title compound as an orange solid (4.03 g, 88% yield). δH (DMSO-d6): 11.6 (1H, bs), 9.18 (1H, s) 3.94 (3H, s), 2.82 (3H, s).

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