Synthesis of substituted [11C]ureas and [11C]sulphonylureas by Rh(I)-mediated carbonylation
作者:Ola Åberg、Bengt Långström
DOI:10.1002/jlcr.1803
日期:2011.1
The urea moiety is present in many biologically active compounds and thus an attractive target for 11C-labelling. To extend the scope of the rhodium(I)-mediated carbonylative cross-coupling reaction between an azide and an amine and investigate its tolerance for functional groups, we have synthesized eight ureas and two sulphonylureas that were 11C-labelled in the carbonyl position. The decay-corrected analytical radiochemical yields were in the range of 14–96% (from [11C]carbon monoxide). For example: starting from 1.33 GBq [11C]carbon monoxide, 0.237 GBq (66%) of the cytotoxic sulphonylurea [11C]LY-181984 11 was isolated within 60 min from end of bombardment. The mild reaction conditions and generality regarding functional groups of this method make it an attractive alternative to the [11C]phosgene method for the synthesis of 11C-labelled ureas. Copyright © 2010 John Wiley & Sons, Ltd.
尿素部分存在于许多生物活性化合物中,因此成为11C标记的有吸引力的目标。为了扩展铑(I)催化的羰基化交叉偶联反应(涉及叠氮化物和胺)的适用范围,并研究其对功能基团的耐受性,我们合成了八种尿素和两种磺酰尿素,并在羰基位置进行了11C标记。衰减校正后的分析性放射化学产率在14-96%之间(从[11C]一氧化碳开始)。例如:从1.33 GBq的[11C]一氧化碳出发,在轰击结束后的60分钟内分离出0.237 GBq(66%)的细胞毒性磺酰尿素[11C]LY-181984 11。该方法的温和反应条件和对功能基团的普遍性使其成为合成11C标记尿素时[11C]光气法的吸引人的替代方案。版权所有 © 2010 John Wiley & Sons, Ltd.