[2-14C]-Methylglyoxal bis(guanylhydrazone) dihydrochloride, [14C]-mitoguazone, 3, has been prepared in three steps from potassium [1-14C]-acetate in an overall radiochemical yield of 16%. The key steps in this procedure are the formation of the sodium salt of [acetone-2-14C]-methylsulfinylacetone, 5, and Pummerer rearrangement to the [14C] labelled hemithioacetal, 6, which is trapped with two equivalents of aminoguanidine to afford the desired [14C] mitoguazone, 3.
[2-14C]-
甲基乙二醛双(
鸟苷腙)二盐酸盐,即[14C]-甲
氨基瓜酮,3,是由[1-14C]-
乙酸钾分三步制备的,总放射
化学收率为 16%。该过程的关键步骤是生成[
丙酮-2-14C]-甲基亚磺酰
丙酮钠盐 5,然后进行普默尔重排生成[14C]标记的半
硫代
乙醛 6,再用两个等量的
氨基
胍进行捕获,得到所需的[14C]米托瓜宗 3。