Oxidative coupling between C(sp(2))-H bonds and C(sp(3))-H bonds is achieved by the Ni(II)-catalyzed reaction of benzamides containing an 8-aminoquinoline moiety as the directing group with toluene derivatives in the presence of heptafluoroisopropyl iodide as the oxidant. The method has a broad scope and shows high functional group compatibility. Toluene derivatives can be used as the coupling partner
The cobalt-catalyzed chelation-assisted iodination of aromatic amides using molecular I2 as an iodinating reagent is reported. 8-Amino-5-chloroquinoline functions as an efficient directing group. This mild and air stable catalytic system shows a wide functional group tolerance and improved synthetic accessibility.
Methoxylation on the C5 and C6 positions of quinolines with methanol
作者:Guodong Wang、Junfen Han、Kai Wang、Hongshaung Li、Guiyun Duan、Chengcai Xia、Furong Li
DOI:10.1016/j.catcom.2018.05.021
日期:2018.8
The C(5)H and C(6)H methoxylation of quinoline amides with methanol was presented by using PtCl2 or triethylamine as an additive. The reaction when conducted under mild conditions provides expedient access to quinoline derivatives, which are frequently found in many drug candidates.
Copper-mediated Decarboxylative Coupling of Benzamides with Potassium Malonate Monoesters via Directed C–H Cleavage
作者:Kazutaka Takamatsu、Koji Hirano、Masahiro Miura
DOI:10.1246/cl.171212
日期:2018.4.5
A copper-mediated decarboxylative coupling of benzamides with potassium malonate monoesters via 8-aminoquinoline-directed C–H cleavage has been developed. This reaction proceeds only by a copper salt to produce the corresponding alkylation products in good yields.
A Pd‐catalyzed directed trifluoromethylthiolation of acrylamides and aromatic amides by C–H bond functionalization was developed by using the Munavalli reagent in the absence of additives. This general approach allowed the direct introduction of the SCF3 group on unsaturated amides in moderate to good yields and offered a straightforward access to various original SCF3‐containing molecules.