Palladium-Catalyzed Double Carbonylation Using Near Stoichiometric Carbon Monoxide: Expedient Access to Substituted <sup>13</sup>C<sub>2</sub>-Labeled Phenethylamines
作者:Dennis U. Nielsen、Karoline Neumann、Rolf H. Taaning、Anders T. Lindhardt、Amalie Modvig、Troels Skrydstrup
DOI:10.1021/jo3009337
日期:2012.7.20
A novel and general approach for 13C2- and 2H-labeled phenethylamine derivatives has been developed, based on a highly convergent single-step assembly of the carbon skeleton. The efficient incorporation of two carbon-13 isotopes into phenethylamines was accomplished using a palladium-catalyzed doublecarbonylation of aryl iodides with near stoichiometric carbon monoxide.
基于高度收敛的碳骨架一步组装,已开发出一种新颖且通用的13 C 2-和2 H标记的苯乙胺衍生物的方法。使用钯催化的具有接近化学计量的一氧化碳的芳基碘化物的双羰基化作用,可以将两个碳13同位素有效地结合到苯乙胺中。
4-Phenyl-1,2,3,4-tetrahydroisoquinolines whose structures have two hydroxy groups substituted at the 3,4- position on the 4-phenyl ring have been found to have renal vasodilating activity upon internal administration. The active ingredients are prepared by cyclizing N-(2- substituted benzyl)-1-(3,4-dimethoxyphenyl)-amino-ethanol using either a Lewis acid or an acid cyclizing agent followed by demethylation at the 3,4-dimethoxyphenyl moiety.