Hazlewood et al., Journal and Proceedings - Royal Society of New South Wales, 1937, vol. 71, p. 92,101
作者:Hazlewood et al.
DOI:——
日期:——
Indium-mediated one-pot pyrrole synthesis from nitrobenzenes and 1,4-diketones
作者:Hyunseung Lee、Byeong Hyo Kim
DOI:10.1016/j.tet.2013.05.113
日期:2013.8
One-pot reduction-triggered heterocyclizations of nitrobenzene derivatives with 1,4-diketones were investigated. In the presence of indium/AcOH in toluene at 80 degrees C, reaction of nitrobenzenes with 2,5-hexadione produced moderate to excellent yields (40-98%) of the corresponding pyrroles within 1.5-24 h depending on the substituents of the starting materials. Similarly, the reaction of nitrobenzenes with 1-phenyl-1,4-pantanedione in the presence of indium/AcOH in toluene at reflux afforded the corresponding pyrroles within 0.5-24 h with 60-98% yields. (C) 2013 Elsevier Ltd. All rights reserved.
Vorkapic-Furac, Jasna; Mintas, Mladen; Kastner, Fritz, Journal of Heterocyclic Chemistry, 1992, vol. 29, # 2, p. 327 - 333
作者:Vorkapic-Furac, Jasna、Mintas, Mladen、Kastner, Fritz、Mannschreck, Albrecht
DOI:——
日期:——
Cascade Synthesis of Pyrroles from Nitroarenes with Benign Reductants Using a Heterogeneous Cobalt Catalyst
A bifunctional 3d‐metal catalyst for the cascade synthesis of diverse pyrroles from nitroarenes is presented. The optimal catalytic system Co/NGr‐C@SiO2‐L is obtained by pyrolysis of a cobalt‐impregnated composite followed by subsequent selective leaching. In the presence of this material, (transfer) hydrogenation of easily available nitroarenes and subsequent Paal–Knorr/Clauson‐Kass condensation provides