作者:Shao-Yong Wu、Mohammad R. Masjedizadeh
DOI:10.1002/jlcr.1566
日期:2009.1
Tritium labelling of the enkephalinase inhibitor, thiorphan, is complicated by the presence of mercapto functional group. Reactions often used in aromatic tritiation, such as halogination and catalytic halogen/tritium displacement, are adversely affected by the presence of the divalent sulfur moeity. By protecting the SH group with t-butyl group, the tritiation reaction proceeded smoothly without catalyst
由于巯基官能团的存在,脑啡肽酶抑制剂噻吩的氚标记变得复杂。常用于芳族氚化的反应,如卤化和催化卤素/氚置换,受到二价硫部分存在的不利影响。通过用叔丁基保护 SH 基团,氚化反应顺利进行,没有催化剂中毒。使用 2-硝基苯亚磺酰氯和二硫苏糖醇 (DTT) 可以轻松高效地重新生成巯基官能团。如此获得的[ 3 H]-噻吩通过AN-HPLC具有>99%的放射化学纯度和18.42Ci/mmol的比活。[3H]-噻吩在 4°C 下储存在含有 10% 甲醇和 0.2% DTT 的水溶液中避光时表现出良好的稳定性。版权所有 © 2008 John Wiley & Sons, Ltd.