then [11C]CH3I) with excess 5-tributylstannyl-2′-deoxyuridine and -4′-thio-2′-deoxyuridine were investigated for the syntheses of [methyl-11C]thymidine and its stable analogue, 4′-[methyl-11C]thiothymidine as PET probes for cancer diagnosis. The previously reported conditions were attempted using Pd2(dba)3/P(o-CH3C6H4)3 (1 : 4 in molar ratio) at 130 °C for 5 min in DMF, giving desired products only in
Pd 0介导的CH 3 I(然后是[ 11 C] CH 3 I)与过量的快速偶联5-三
丁基锡烷基-
2'-脱氧尿苷和-4'-
硫代-
2'-脱氧尿苷进行了调查[甲基的合成11 C]胸腺
嘧啶脱氧核苷及其稳定类似物,4' - [甲基- 11 C]
硫代
胸苷作为PET探针用于癌症诊断。在
DMF中于130°C下使用Pd 2(dba)3 / P(o -CH 3 C 6 H 4)3(摩尔比为1:4 )尝试5分钟,仅在32和30%的收益率。因此,我们调整了实验室中针对杂芳族化合物开发的当前反应条件。使用CH 3 I /
锡烷/ Pd 2(dba)3 / P(o在80°C下生成-CH 3 C 6 H 4)3 / CuCl / K 2 CO 3(1:25:1:32:2:5)
胸苷收率达85%。而CH 3 I /
锡烷/ Pd 2(dba)3 / P(o -CH 3 C 6 H 4)3 / CuBr / CsF(1:25:1:32:2:5),包括另一个CuBr