Reduction of arenediazonium salts by tetrakis(dimethylamino)ethylene (TDAE): Efficient formation of products derived from aryl radicals
作者:Mohan Mahesh、John A Murphy、Franck LeStrat、Hans Peter Wessel
DOI:10.3762/bjoc.5.1
日期:——
arenediazonium salts to aryl radical intermediates through a single electron transfer (SET) pathway. Cyclization of the aryl radicals produced in this way led, in appropriate substrates, to syntheses of indolines and indoles. Cascade radical cyclizations of aryl radicalsderivedfrom arenediazonium salts are also reported. The relative ease of removal of the oxidized by-products of TDAE from the reaction
作者:Scarpa de Souza, Edson Leonardo、Gorbatov, Sergei Aleksandrovich、Pierozzi, Breno Mendes、Batista Junior, João Marcos、Duarte Correia, Carlos Roque
DOI:10.1002/chem.202401115
日期:——
A one-pot tandem protocol is reported for the enantioselective Pd-catalyzed synthesis of dihydrobenzofuran, dihydroindole, and dihydrobenzosulfone scaffolds by a Heck-Matsuda reaction under open-flask conditions with in situ generation of aryldiazonium salt directly from anilines. The enantioenriched heterocycles are synthesized in overall yields up to 78 % in enantiomeric ratios up to 99 : 1 by a
Reverdin, Helvetica Chimica Acta, 1929, vol. 12, p. 1055
作者:Reverdin
DOI:——
日期:——
Mild hypervalent iodine mediated oxidative nitration of N-aryl sulfonamides
作者:Ulrich Kloeckner、Boris J. Nachtsheim
DOI:10.1039/c4cc04738a
日期:——
An oxidative and acid-free method for the nitration of N-aryl sulfonamides has been developed using a combination of sodium nitrite as cheap and easy to handle NO2-source and the hypervalent iodine reagent PIFA as stoichiometric oxidant. Under very mild reaction conditions, the desired mononitrated aryl sulfonamides were isolated in up to 87% yield. This is the first example of an iodane-mediated oxidative nitration.