Carboxylic acid derivatives containing acyl halides, anhydrides, esters, amides and acyl nitriles are highly appealing electrophiles in transition-metal-catalyzed carbon-carbon bond-forming reactions due to their ready availability and low cost, which can provide divergent transformations of carboxylic acids into other value-added products. In this Minireview, we focus on the recent advances of decarbonylative transformations of carboxylic acid derivatives in carbon-carbon bond formations using Ni or Pd catalysts. A series of reaction types, product classifications and reaction pathways are presented herein, which show the advantageous features of carboxylic acid derivatives as alternative to aryl or alkyl halides in terms of reactivity and compatibility. The well-accepted mechanism of nickel- or palladium-catalyzed decarbonylative transformations involves initial oxidative addition of carboxylic acid derivatives, followed by decarbonylation or transmetalation (or insertion), and reductive elimination to generate the products, thereby regenerating the catalysts.

中文翻译：

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镍或钯催化的羧酸衍生物的脱羰转化。

含酰基卤，酸酐，酯，酰胺和酰基腈的羧酸衍生物由于易于获得且成本低廉，因此在过渡金属催化的碳-碳键形成反应中具有很高的亲电性，可提供羧酸的发散转化为其他增值产品。在此Minireview中，我们重点介绍使用Ni或Pd催化剂在碳-碳键形成中羧酸衍生物的脱羰转化的最新进展。本文提供了一系列反应类型，产物分类和反应途径，其在反应性和相容性方面显示了羧酸衍生物作为芳基或烷基卤化物的替代物的有利特征。