作者:Jan-Olov Thorell、Sharon Stone-Elander、Nils Elander
DOI:10.1002/jlcr.2580340410
日期:1994.4
A synthetic strategy for producing new difunctional molecules for potential use as radiolabelling precursors derived from [11C]cyanide is presented. No-carrier-added [11C]CN− was reacted with chloromethyl pivalate to generate the nitrile [11C]cyanomethyl pivalate, which was subsequently converted to ethyl 1 [1-11C]glycolate, 2, with acid and alcohol, or to [1-11C]glycolic acid, 4, using aqueous acid. [1-11C]Ethylene glycol, 3, and [2-11C]2-aminoethanol 5, were obtained by reduction of2 and 1, respectively, with lithium aluminum hydride. Conditions for obtaining conversions ca. 90% are described. By using a microwave wave-guide cavity to speed up transformations requiring elevated temperatures, all five carbon-11 labelled compounds were synthesized in less than a total of 3 min.
本文介绍了一种合成策略,用于生产可能用作放射性标记前体的新的双官能团分子,这些前体来自[11C]氰化物。无载体添加的[11C]CN-与特戊酸氯甲酯反应生成腈类[11C]特戊酸氰甲酯,然后用酸和酒精将其转化为 1 [1-11C]glycolate 乙酯 2,或用水酸将其转化为 [1-11C]glycolic 酸 4。用氢化锂铝分别还原 2 和 1,得到[1-11C]乙二醇 3 和[2-11C]2-氨基乙醇 5。文中介绍了获得约 90% 转化率的条件。通过使用微波波导腔来加速需要高温的转化过程,在不到 3 分钟的时间内就合成了所有五种碳-11 标记的化合物。