Syntheses of (5,8-l3C2)- and (1,12-l3C2)Spermine Using Potassium (l3C)Cyanide as the 13C Source.
作者:Keijiro SAMEJIMA、Noriko MATSUSHIMA、Masaru NIITSU、Takanobu BEPPU、Benjamin FRYDMAN
DOI:10.1248/cpb.43.2001
日期:——
[5, 8-13C2]Spermine and [1, 12-13C2]spermine were prepared using [13C]KCN as the source of the label. By reaction of the latter with 1, 2-dibromoethane and ethylene chlorohydrin, the corresponding [1, 4-13C2]succinodinitrile and [CN-13C]ethylene cyanohydrin were respectively obtained. The reaction conditions were carefully adjusted so as to optimize the yields of the 13C-enriched intermediates. The nitrile residues were then reduced using sodium trifluoroacetoxyborohydride in tetrahydrofuran. [1, 4-13C2]Putrescine and [3-13C]3-aminopropanol were thus obtained. The latter was transformed into its [3-13C]3-carbobenzyloxyamidopropyl bromide derivative. The syntheses of [5, 8-13C2]spermine from the [1, 4-13C2]putrescine precursor and N-(3-bromopropyl)phthalimide, and of [1, 12-13C2]spermine from N, N'-bisbenzylputrescine and the [3-13C]3-carbobenzyloxyamidopropyl bromide precursor were then carried out using our previously reported methods, which were modified so as to maximize the yields of the 13C-enriched products.
使用[13C]KCN作为标记源制备[5, 8-13C2]精胺和[1, 12-13C2]精胺。后者与1,2-二溴乙烷和氯丙烷反应,分别得到相应的[1,4-13C2]丁二腈和[CN-13C]乙烯氰醇。仔细调整反应条件以优化富含 13C 的中间体的产率。然后使用三氟乙酰氧基硼氢化钠的四氢呋喃溶液还原腈残余物。由此获得[1, 4-13C2]腐胺和[3-13C]3-氨基丙醇。后者被转化为其[3-13C]3-苄氧酰氨基丙基溴衍生物。由[1, 4-13C2]腐胺前体和N-(3-溴丙基)邻苯二甲酰亚胺合成[5, 8-13C2]精胺,以及由N, N'-双苄基腐胺和N-(3-溴丙基)邻苯二甲酰亚胺合成[1, 12-13C2]精胺然后使用我们之前报道的方法进行[3-13C]3-碳苄氧基酰胺基丙基溴前体的制备,该方法经过修改以最大限度地提高13C富集产物的产率。