Catalyst-free generation of acyl radicals induced by visible light in water to construct C-N bonds
We describe herein a catalyst-free and redox-neutral photochemical strategy for the direct generation of acyl radicals from α-diketones, and its selective conversion of nitrosoarenes to hydroxyamides or amides with AcOH or NaCl as an additive. The reaction was carried out under mild conditions in water with purple LEDs as the light source. A broad scope of substrates was demonstrated. Mechanistic experiments indicate that α-diketones cleave to give acyl radicals, with hydroxyamides being further reduced to amides.
Indium-mediated one-pot reductive conversion of nitroarenes to N-arylacetamides
N-Arylacetamides were prepared in excellent yields from nitroarenes in the presence of acetic anhydride, acetic acid and indium by a one-pot procedure.
Kim, Byeong Hyo,Han, Rongbi,Piao, Fengyu,Jun, Young Moo,Baik, Woonphil,Lee, Byung Min
p. 77 - 79
(2007/10/03)
A novel one pot reductive acetylation of nitroarenes
Nitroarenes are reductively acetylated in one pot to the corres, ponding N-arylacetamides and N-(acetyloxy)-N-arylacetamides with Zn and Ac2O in presence of acidic Al2O3 in dichloromethane at room temperature.
Baruah
p. 300 - 303
(2007/10/03)
Synthesis of N,O-Diacetylated N-Arylhydroxylamines by Reduction of Nitroaromatics with Zinc and Acetic Anhydride
Reduction of nitroaromatic compounds with zinc and acetic anhydride in dichloromethane gave N,O-diacetylated N-arylhydroxylamines in good yields under mild conditions.
Kim, Byeong Hyo,Jun, Young Moo,Suh, Seung Won,Baik, Woonphil,Lee, Byung Min
p. 46 - 47
(2007/10/03)
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