A Direct and Mild Formylation Method for Substituted Benzenes Utilizing Dichloromethyl Methyl Ether–Silver Trifluoromethanesulfonate
作者:Kosuke Ohsawa、Masahito Yoshida、Takayuki Doi
DOI:10.1021/jo400056k
日期:2013.4.5
A silver trifluoromethanesulfonate (AgOTf)-promoted direct and mild formylation of benzenes has been developed. The reaction utilizing dichloromethylmethylether (Cl2CHOMe) and AgOTf powerfully formylated various substituted benzenes under temperature conditions as low as −78 °C without losing the protecting groups on the phenolic hydroxyl group.
Palladium-catalyzed ortho-C(sp2) H bromination of benzaldehydes via a monodentate transient directing group strategy
作者:Qiyun Yong、Bing Sun、Fang-Lin Zhang
DOI:10.1016/j.tetlet.2019.151263
日期:2019.11
developed to enable the palladium-catalyzed ortho-C(sp2)- H bromination of benzaldehydes. A broad scope of benzaldehydes were transformed into the desired products by employing 2-amino-5-chlorobenzotrifluoride as a monodentate transient directing group, demonstrating good functional group tolerance. Mild reaction conditions and no requirement for a silver salt are also features of this strategy.
Silver/Rhodium Relay Catalysis Enables C−H Functionalization of
<i>In Situ</i>
Generated Isoquinolines with Sulfoxonium Ylides: Construction of Hexahydrodibenzo[
<i>a</i>
,
<i>g</i>
]quinolizine Scaffolds
作者:Quanzhe Li、Ruixing Liu、Yin Wei、Min Shi
DOI:10.1002/adsc.202100141
日期:2021.5.18
developed. The acylmethylated isoquinoline derivatives could be afforded with broad substrate scope in 23–88% yields, which could be further transformed to the core skeleton of hexahydrodibenzo[a,g]quinolizine as drug-candidates. Moreover, this reaction was achieved in a gram-scale. A reasonable reaction mechanism has been proposed based on a series of control and KIE experiments.