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Pd-Catalyzed Cross-Coupling Reactions with Carbonyls: Application in a Very Efficient Synthesis of 4-Aryltetrahydropyridines

机译:Pd催化的羰基交叉偶联反应:在4-芳基四氢吡啶的高效合成中的应用

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摘要

Palladium-catalyzed couplings are very powerful tools for the formation of C-C linkages.[1] A typical cross-coupling reaction involves the combination of an electrophile with a nucleophile in the presence of a metal catalyst. The classical nucleophilic components are organometallic reagents derived from, for example, magnesium,[2] boron,[3] silicon,[4] tin,[5] and zinc,[6] whereas the electrophiles are generally organic halides or sulfonates. Thus, a prerequisite for introducing an organic fragment by a cross-coupling reaction is its conversion into either the nucleophilic or the electrophilic component. In many cases, multistep, expensive, and moisture-sensitive processes are involved in these transformations.
机译:钯催化的偶联是形成C-C键的非常强大的工具。[1]典型的交叉偶联反应涉及在金属催化剂存在下亲电试剂与亲核试剂的结合。经典的亲核组分是衍生自例如镁,[2]硼,[3]硅,[4]锡,[5]和锌[6]的有机金属试剂,而亲电子试剂通常是有机卤化物或磺酸盐。因此,通过交叉偶联反应引入有机片段的先决条件是其转化为亲核或亲电子组分。在许多情况下,这些转换涉及多步,昂贵且对水分敏感的过程。

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