Cu-catalyzed tandem reactions of fluorinated alkynes with sulfonyl azides en route to 2-trifluoromethylquinolines
作者:Yajun Li、Lisi Zhang、Li Zhang、Yongming Wu、Yuefa Gong
DOI:10.1039/c3ob41658e
日期:——
A novel method for the synthesis of 2-trifluoromethylquinolines via Cu-catalyzed tandem reactions was reported. A strong electronic effect was observed, but the steric effect was negligible.
palladium-catalyzed, norbornene-mediated intermolecular dehydrogenative annulation approach for the synthesis of 6-fluoroalkyl-phenanthridines from aryl iodides and fluorinated imidoyl chlorides, which are important structural motifs for bioactive molecules, is reported. Fluorinated imidoyl chlorides served as a new type of electrophilic reagent in the Catellani-type reaction, which, in turn, could
Telescoped, Divergent, Chemoselective C1 and C1‐C1 Homologation of Imine Surrogates: Access to Quaternary Chloro‐ and Halomethyl‐Trifluoromethyl Aziridines
作者:Laura Ielo、Saad Touqeer、Alexander Roller、Thierry Langer、Wolfgang Holzer、Vittorio Pace
DOI:10.1002/anie.201812525
日期:2019.2.18
A conceptually novel, high‐yielding, mono‐ or bis‐homologation was realized with lithium halocarbenoids and enables the one‐step, fully chemocontrolled assembly of a new class of quaternary trifluoromethyl aziridines. Trifluoroacetimidoyl chlorides (TFAICs) act as convenient electrophilic platforms, enabling the addition of either one or two homologating elements by simply controlling the stoichiometry
coupling reaction has been described for oxidation cyclization of 2,2,2-trifluoro-N-(1-iminoethyl)-N′-arylacetimidamide to synthesis of novel 3-methyl-1-aryl-5-(trifluoromethyl)-1H-1,2,4-triazole derivatives under mild conditions with excellent yield without need to any purification. This procedure doesn’t have need to use of transition metals an also, can be used on gram scale. This synthetic method
<i>N</i>-Iodosuccinimide-Mediated Synthesis of Benzo-Fused Bisimidazoles Enabled by a One-Pot Tandem Reaction of Fluorinated Propargyl Amidines
作者:Shan Li、Lu Lei、Bin Feng、Xiaofeng Liu、Liqing Xian、Yajun Li
DOI:10.1021/acs.joc.2c02379
日期:——
efficient tandem reaction between fluorinated propargyl amidines and aromatic o-diamines without any metal catalyst and additive under mild reaction conditions was developed for the synthesis of benzo-fused bisimidazoles in moderate to excellent yields. Preliminary mechanistic studies suggested that this reaction proceeded by an intermediate of secondary aminederivedfrom 5-iodomethyl imidazole, and NIS