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.
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.
Mild Approach to the Deprotection of Troc from Protected Amines Using Mischmetal and TMSCl
作者:Eerold Vellemäe、Vladimir Stepanov、Uno Mäeorg
DOI:10.1080/00397910903419910
日期:2010.10.20
The 2,2,2-trichloroethoxycarbonyl (Troc) protecting group was efficiently removed from Troc-protected aliphatic and aromatic amines and also some Troc, Tos- and Troc, Ac-protected amines using activated mischmetal (MM). All reactions were performed by refluxing in dry tetrahydrofuran under an argon atmosphere and gave moderate to excellent yields. Several new compounds were synthesized, and new data about reactivity of Troc group were obtained.
Vellemaee, Eerold; Lebedev, Oleg; Sillard, Rannar, Journal of Chemical Research, 2006, # 11, p. 685 - 687
作者:Vellemaee, Eerold、Lebedev, Oleg、Sillard, Rannar、Maeeorg, Uno