Synthesis of 11C-amides using [11C]carbon monoxide and in situ activated amines by palladium-mediated carboxaminations
作者:Farhad Karimi、Bengt Långström
DOI:10.1039/b209553j
日期:2003.1.30
were used in the palladium-mediated synthesis of twenty 11C-amides. In the study several approaches to improve the radiochemical yield were explored. Eight of the selected amides were prepared by in situ activation of the amines using lithium bis(trimethylsilyl)amide and the radiochemical yields of these reactions were improved compared to utilising a previous reported method. In the synthesis of 1
低浓度的[11C]一氧化碳,卤化芳基和胺用于钯介导的20种11C-酰胺的合成中。在研究中,探索了几种提高放射化学产率的方法。通过使用双(三甲基甲硅烷基)酰胺锂原位活化胺来制备八种选定的酰胺,与利用先前报道的方法相比,这些反应的放射化学产率得到了提高。在由3-甲基-1H-吲哚(25)合成1- [羰基-11C]苯甲酰基-3-甲基-1H-吲哚(11)时,在酰化反应之前制备相应的有机锡-胺。在一个典型的实验中,使用4-氨基苯酚(20)以15%的放射化学收率制备了N-(4-羟苯基)[羰基-11C]乙酰胺(5),但是当胺被双锂基锂活化时,收率增加到63%。 (三甲基甲硅烷基)酰胺。