Nickel-Catalyzed Direct Arylation of C(sp<sup>3</sup>)–H Bonds in Aliphatic Amides via Bidentate-Chelation Assistance
作者:Yoshinori Aihara、Naoto Chatani
DOI:10.1021/ja411715v
日期:2014.1.22
The Ni-catalyzed, direct arylation of C(sp(3))-H (methyl and methylene) bonds in aliphatic amides containing an 8-aminoquinoline moiety as a bidentate directing group with aryl halides is described. Deuterium-labeling experiments indicate that the C-H bond cleavage step is fast and reversible. Various nickel complexes including both Ni(II) and Ni(0) show a high catalytic activity. The results of a
描述了 Ni 催化的 C(sp(3))-H(甲基和亚甲基)键在脂肪族酰胺中的直接芳基化,其中包含一个 8-氨基喹啉部分作为与芳基卤化物的双齿导向基团。氘标记实验表明 CH 键裂解步骤快速且可逆。包括 Ni(II) 和 Ni(0) 在内的各种镍配合物显示出高催化活性。一系列机理实验的结果表明,催化反应不是通过 Ni(0)/Ni(II) 催化循环进行,而是通过 Ni(II)/Ni(IV) 催化循环进行。