Metal-Free Synthesis of Fluorinated Indoles Enabled by Oxidative Dearomatization
作者:Edon Vitaku、David T. Smith、Jon T. Njardarson
DOI:10.1002/anie.201511149
日期:2016.2.5
fluorinated drugs is increasing each decade. Therefore, new approaches for accessing fluorinated nitrogen heterocycles are of great significance. A novel, scalable, and metal‐free method for accessing a wide range of fluorinated indoles is described. This oxidative‐dearomatization‐enabled approach assembles 2‐trifluoromethyl NH‐indole products fromsimple commercially available anilines with hexafluoroacetylacetone
Intermolecular aromatic C(sp2)–H amination promoted by neutral rhodium nitrenoids has been developed. The reactions proceeded with various oxygen-substituted arenes (1.5 equiv.) in a chemo- and regioselective manner. The aromatic C(sp2)–H amination took place at the para position of the oxygen substituent in the presence of benzylic C(sp3)–H bonds and/or C(sp3)–H bonds α to ethereal oxygen.
A Mild Deprotection of Trichloroethyl Carbamates Using Indium Metal
作者:Tomoko Mineno、Seoung-Ryoung Choi、Mitchell A. Avery
DOI:10.1055/s-2002-31919
日期:——
The trichloroethoxycarbonyl moiety was efficiently removed from carbamates to furnish the corresponding amines using indium metal in good to excellent yields.
三氯乙氧基羧酰基从氨基甲酸酯中高效去除,使用铟金属,得到相应的胺,产率良好到优越。
Copper-catalyzed Csp2–H amidation of unactivated arenes by N-tosyloxycarbamates
作者:Alex John、Jeena Byun、Kenneth M. Nicholas
DOI:10.1039/c3cc46412a
日期:——
[(Neocuproine)Cu]PF6 catalyzes the CâH amidation of unactivated arenes by N-tosyloxytrichloroethylcarbamates. Alkyl benzenes are selectively converted to aromatic amines and substituted arenes display variable regioselectivity.