This review highlights the allylic C−H alkylation of alkenes (AA_H) with nucleophiles under Pd⁰ or Pd^II catalysis and achiral or chiral conditions. The η³-allylpalladium intermediates of these reactions are formed from the cleavage of an allylic hydrogen which becomes a leaving group, like the acetate moiety of allyl acetates during the classical Tsuji-Trost procedure. Most of these cross-dehydrogenative-couplings require quinones as key components; they may play the role of ligand, proton trap and oxidant. Efficient asymmetric allylic C−H alkylations (AAA_H’s) have been performed. The diversity of the procedures, their limitation and application in synthesis are underlined as well as the proposed mechanisms with, in some cases, personal comments. The data are grouped according to the reaction conditions.

中文翻译：

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通过 Pd 催化的 C(sp3)-H 活化烯烃和 1,4-二烯形成烯丙基 C(sp3)-C(sp3) 键

^{本综述重点介绍了在 Pd 0}或 Pd ^II催化以及非手性或手性条件下烯烃 (AA _H ) 与亲核试剂的烯丙基 C-H 烷基化。这些反应的 η ³ -烯丙基钯中间体是由成为离去基团的烯丙基氢的裂解形成的，就像在经典的 Tsuji-Trost 过程中乙酸烯丙酯的乙酸酯部分一样。大多数这些交叉脱氢偶联需要醌作为关键成分。它们可能起配体、质子陷阱和氧化剂的作用。高效的不对称烯丙基 C-H 烷基化（AAA _H's) 已执行。强调了程序的多样性、它们的局限性和在合成中的应用，以及所提出的机制，在某些情况下，还有个人评论。数据根据反应条件分组。