01514nas a2200193   4500008004100000022001400041245020700055210006900262260000900331300001400340490000700354520072300361100002201084700002301106700002301129700001701152700002101169856013001190       2019                        eng d  a0022-326300aExternal oxidant-dependent reactivity switch in copper-mediated intramolecular carboamination of alkynes: access to a different class of fluorescent ionic nitrogen-doped polycyclic aromatic hydrocarbons0 aExternal oxidantdependent reactivity switch in coppermediated in  cAPR   a4120-41300 v843 a<p>An interesting case of external oxidant-controlled reactivity switch leading to a divergent set of ionic nitrogen-doped polycyclic aromatic hydrocarbons (N-doped PAHs), is presented here, which is quite unrecognized in copper-mediated reactions. In the current scenario, from the same pyridino-alkyne substrates, the use of the external oxidant Ph1(0Ac)2, in combination with Cu(OTf)(2), gave N-doped spiro-PAHs via a dearomative 1,2-carboamination process; whereas, without the use of oxidant, an alkyne/azadiene [4 + 2]-cycloaddition cascade occurred to exclusively afford ionic N-doped PAHs. These newly synthesized N-doped PAHs further exhibit tunable emissions, as well as excellent quantum efficiencies.</p>
1 aShaikh, Aslam, C.1 aBanerjee, Somsuvra1 aMule, Ravindra, D.1 aBera, Saibal1 aPatil, Nitin, T.  uhttps://library.ncl.res.in/content/external-oxidant-dependent-reactivity-switch-copper-mediated-intramolecular-carboamination