Dicumyl Peroxide as a Methylating Reagent in the Ni-Catalyzed Methylation of Ortho C–H Bonds in Aromatic Amides
作者:Teruhiko Kubo、Naoto Chatani
DOI:10.1021/acs.orglett.6b00658
日期:2016.4.1
The direct methylation of ortho C–H bonds in aromatic amides with dicumyl peroxide (DCP) using a nickel complex as the catalyst is reported. The reaction shows a high functional group tolerance and is inhibited by radical scavengers. In reactions of meta-substituted aromatic amides, the reaction proceeds in a highly selective manner at the less hindered C–H bonds.
Rhodium-Catalyzed Alkylation of C–H Bonds in Aromatic Amides with α,β-Unsaturated Esters
作者:Kaname Shibata、Naoto Chatani
DOI:10.1021/ol502500c
日期:2014.10.3
carbonyl compounds by a rhodium-catalyzed reaction of aromaticamidescontaining an 8-aminoquinoline moiety is reported. The reaction is highly regioselective. The formation of C–C bonds occurs between the ortho C–H bonds in aromaticamides and the β-position of the acyclic α,β-unsaturated carbonyl compounds. The reaction is applicable to various acyclic α,β-unsaturated carbonyl compounds, such as
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。
Nickela‐electrocatalyzed Mild C−H Alkylations at Room Temperature
作者:Ramesh C. Samanta、Julia Struwe、Lutz Ackermann
DOI:10.1002/anie.202004958
日期:2020.8.10
nickel catalysis commonly requires high reaction temperatures and strong bases, translating into limited substrate scope. Herein, nickel‐catalyzed C−H alkylations of unactivated 8‐aminoquinoline amides have been realized under exceedingly mild conditions, namely at room temperature, with a mild base and a user‐friendly electrochemical setup. This electrocatalyzed C−H alkylation displays high functional