27451-20-3Relevant academic research and scientific papers
Rhodium-Catalyzed Annulation of N-Acetoxyacetanilide with Substituted Alkynes: Conversion of Nitroarenes to Substituted Indoles
Ghorai, Jayanta,Ramachandran, Kuppan,Anbarasan, Pazhamalai
, p. 14812 - 14825 (2021/10/25)
A general and efficient rhodium-catalyzed redox-neutral annulation of N-acetoxyacetanilides, readily accessible from nitroarenes, with alkynes has been accomplished for the synthesis of substituted indole derivatives. A wide range of substituted 2,3-diarylindoles were achieved from various substituted N-acetoxyacetanilides and symmetrical/unsymmetrical alkynes in good to excellent yields. The developed method was successfully integrated with the synthesis of N-acetoxyacetanilides for the efficient one-pot synthesis of indoles from nitroarenes. The important features are the introduction of N-acetoxyacetamide as a new directing group, redox-neutral annulation, an additive-free approach, wide functional group tolerance, an intramolecular version, and a one-pot reaction of nitroarenes. The method was further extended to the synthesis of potent higher analogues of indole, viz., pyrrolo[3,2-f]indoles and dibenzo[a,c]carbazoles. In addition, a plausible mechanism was proposed based on the isolation and stoichiometric study of a potential aryl-Rh intermediate.
An unusual synthesis of N-unsubstituted benzazepinones
Quiclet-Sire, Beatrice,Tran, Ngoc Diem My,Zard, Samir Z.
, p. 5514 - 5517,4 (2020/10/15)
A short route to novel bicyclic N-unprotected benzazepinones is described starting from N-acetoxyanilides involving radical addition and cyclization with concomitant homolytic rupture of the N-O bond.
Indium mediated reductive acylations of nitroarenes towards N,O-diacylated N-arylhydroxylamines
Kim,Jae Wook Cheong,Han,Jun,Baik,Lee
, p. 3577 - 3586 (2007/10/03)
By applying indium, Ac2O, MeOH, and catalytic amount of InCl3 in CHCl3 solution, nitroarenes were transformed into N,O-diacylated N-arylhydroxylamines in moderate to excellent yields.
A novel one pot reductive acetylation of nitroarenes
Baruah
, p. 300 - 303 (2007/10/03)
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.
Synthesis of N,O-Diacetylated N-Arylhydroxylamines by Reduction of Nitroaromatics with Zinc and Acetic Anhydride
Kim, Byeong Hyo,Jun, Young Moo,Suh, Seung Won,Baik, Woonphil,Lee, Byung Min
, p. 46 - 47 (2007/10/03)
Reduction of nitroaromatic compounds with zinc and acetic anhydride in dichloromethane gave N,O-diacetylated N-arylhydroxylamines in good yields under mild conditions.
