Synthesis of 2-Substituted Quinolines from 2-Aminostyryl Ketones Using Iodide as a Catalyst
作者:So Young Lee、Jiye Jeon、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b00552
日期:2018.5.4
A new protocol for the synthesis of 2-substituted quinolinesfrom 2-aminostyryl ketones has been developed using iodide as a nucleophilic catalyst. Conjugate addition of iodide to 2-aminostyryl ketones yielded the corresponding β-iodoketones, which could have a conformation where the amino and carbonyl groups are proximal through free rotation about the Cα–Cβ single bond. Subsequent condensation between
A Cu‐catalyzed C−H cyclization of simple anilines with ketones and DMSO as a one‐carbon source has been developed. Using an aerobicoxidative protocol, a number of ketones and anilines could be easily converted to 2‐arylquinolines, rather than 4‐arylquinolines, thus providing a highly atom‐economical and simple approach to biologically significant 2‐arylquinolines. Based on the preliminary experiments
PdCl2(dppf)-catalyzed in situ coupling of 2-hydroxypyridines with aryl boronic acids mediated by PyBroP and the one-pot chemo- and regioselective construction of two distinct aryl–aryl bonds
作者:Shui-Ming Li、Jie Huang、Guo-Jun Chen、Fu-She Han
DOI:10.1039/c1cc15753a
日期:——
of 2-arylated pyridine derivatives via the in situ coupling of 2-OH pyridines and boronic acidsmediated by PyBroP. In addition, the highly chemo- and regioselective construction of two different aryl-aryl bonds via a one-pot operation has also been demonstrated by the orthogonal use of this method with the Ni-catalyzed Suzuki-Miyaura coupling of phenols.
Simple and Clean Photo-induced Methylation of Heteroarenes with MeOH
作者:Wenbo Liu、Xiaobo Yang、Zhong-Zhen Zhou、Chao-Jun Li
DOI:10.1016/j.chempr.2017.03.009
日期:2017.5
Heteroarene methylation utilizing a cheap and safe methylation source without involving transition metals represents an important yet challenging objective. Here, a simple and clean catalyst-free protocol for the methylation of various heteroarenes (including six- and five-membered types) is described under light irradiation. This protocol employs cheap, readily available, and abundant MeOH as both
Aromatic C-H Addition to Ketones: The Effect of Directing Groups
作者:Xi-Sha Zhang、Qi-Lei Zhu、Fei-Xian Luo、Guihua Chen、Xin Wang、Zhang-Jie Shi
DOI:10.1002/ejoc.201301115
日期:2013.10
The first example of the transition-metal-catalyzed direct intermolecular C–H bond addition to ketones was achieved by using a rhodium catalyst. A significant influence of the directing group on the reactivity was observed, and sterically more hindered directing groups could promote the reaction. In addition, intermolecular hydrogen bonding played a role in stabilizing the product. The substrate scope