Allylation reactions are one of the most fundamental and productive C−C bond-forming transformations, as the allyl group can provide a useful handle for further manipulation. Apart from this, their omnipresence in bioactive species makes them invaluable in medicinal science and pharmaceutical industries. Pioneered by Tsuji and Trost, a myriad of synthetic strategies of allylation reactions have evolved significantly over the last few decades. With the emergence of site-selective C–H activation, the perimeter of allylation reactions has extended in different latitudes. C–H activation has averted the over dependency on traditional approaches and has circumvented its major drawbacks. With the present state of knowledge, C–H allylation reactions not only have precluded the need for pre-functionalized substrate and activated allylating reagents but it is also now apparent that they trigger the allylic selectivity of an unsaturated hydrocarbon under proper metal-ligand combination. This review aims to embrace all the aspects of transition-metal-promoted C–H allylation reactions.

烯丙基化反应是最基本和最有效的C-C键形成转化之一，因为烯丙基可为进一步操作提供有用的处理方法。除此之外，它们在生物活性物种中的无处不在使它们在医药科学和制药行业中具有不可估量的价值。在Tsuji和Trost的开创下，近几十年来，无数种烯丙基化反应的合成策略得到了显着发展。随着位点选择性C–H活化作用的出现，烯丙基化反应的范围在不同的纬度上扩展了。C–H激活避免了对传统方法的过度依赖，并规避了其主要缺点。以目前的知识状态，C–H烯丙基化反应不仅排除了对预官能化底物和活化的烯丙基化试剂的需求，而且现在也很明显，它们在适当的金属-配体组合下触发了不饱和烃的烯丙基选择性。这篇综述旨在涵盖过渡金属促进的CH烯丙基化反应的所有方面。