Palladium-Catalyzed Direct C–H Silylation and Germanylation of Benzamides and Carboxamides
作者:Kyalo Stephen Kanyiva、Yoichiro Kuninobu、Motomu Kanai
DOI:10.1021/ol500519y
日期:2014.4.4
A palladium-catalyzed regioselectiveactivation of C(sp2)–H and C(sp3)–H bonds of benzamides and carboxamides, followed by coupling with disilanes to afford organosilanes in moderate to high yields, with the aid of 8-aminoquinoline as a directinggroup, is reported. Catalytic C(sp2)–H germanylation of benzamides also proceeds under the same palladiumcatalysis. The reaction tolerates a wide variety
Chelation‐Assisted Nickel‐Catalyzed Oxidative Annulation via Double C−H Activation/Alkyne Insertion Reaction
作者:Luis C. Misal Castro、Atsushi Obata、Yoshinori Aihara、Naoto Chatani
DOI:10.1002/chem.201504596
日期:2016.1.22
A nickel/NHC system for regioselective oxidative annulation by double C−H bond activation and concomitant alkyne insertion is described. The catalytic reaction requires a bidentate directing group, such as an 8‐aminoquinoline, embedded in the substrate. Various 5,6,7,8‐tetrasubstituted‐N‐(quinolin‐8‐yl)‐1‐naphthamides can be prepared as well as phenanthrene and benzo[h]quinoline amide derivatives.
描述了一种镍/ NHC系统,用于通过双CH键活化和伴随的炔烃插入进行区域选择性氧化环氧化。催化反应需要嵌入底物中的双齿引导基团,例如8-氨基喹啉。可以制备各种5,6,7,8-四取代-N-(喹啉-8-基)-1-萘酰胺以及菲和苯并[h]喹啉酰胺衍生物。该系统中可以使用二芳基炔,二烷基炔和芳烷基炔。提出了Ni 0 / Ni II催化循环作为主要催化循环。炔烃作为双组分偶合伙伴和氢受体起着双重作用。
The Nickel(II)-Catalyzed Direct Benzylation, Allylation, Alkylation, and Methylation of C–H Bonds in Aromatic Amides Containing an 8-Aminoquinoline Moiety as the Directing Group
Direct alkylation via the cleavage of the ortho C–H bonds by a nickel-catalyzed reaction of aromaticamides containing an 8-aminoquinoline moiety as the directing group with alkyl halides is report...
Phenyltrimethylammonium Salts as Methylation Reagents in the Nickel-Catalyzed Methylation of C−H Bonds
作者:Takeshi Uemura、Mao Yamaguchi、Naoto Chatani
DOI:10.1002/anie.201511197
日期:2016.2.24
Methylation of C(sp2)−H bonds was achieved through the NiII‐catalyzed reaction of benzamides with phenyltrimethylammonium bromide or iodide as the source of the methyl group. The reaction has a broad scope and shows high functional‐group compatibility. The reaction is also applicable to the methylation of C(sp3)−H bonds in aliphatic amides.