An Expeditious Synthesis of N-substituted Pyrroles via Microwave-Induced Iodine-Catalyzed Reactions under Solventless Conditions
作者:Debasish Bandyopadhyay、Sanghamitra Mukherjee、Bimal K. Banik
DOI:10.3390/molecules15042520
日期:——
An expeditious synthesis of N-substituted pyrroles has been developed by reacting 2,5-dimethoxy tetrahydrofuran and several amines using a microwave-induced molecular iodine-catalyzed reaction under solventless conditions.
Frustrated Lewis pair-catalyzed double hydroarylation of alkynes with <i>N</i>-substituted pyrroles
作者:Jing Guo、Odelia Cheong、Karlee L. Bamford、Jiliang Zhou、Douglas W. Stephan
DOI:10.1039/c9cc08654d
日期:——
of alkynes with N-substitutedpyrroles is shown to be most efficiently mediated by B(C6F5)3 to yield 12 variants of dipyrrole-alkanes, a mono-hydroarylation product and a tetrahydroarylation product of a bis-alkyne. These products were generally obtained in good to excellent yields (up to 95%). Control experiments suggest a mechanism involving FLP addition of the borane and pyrrole to alkyne.
sustainable, highly regiospecific substituted pyrroles were synthesized using a well-defined, air stable, molecular iron(0) complex. The developed methodology is broadly applicable and tolerates a variety of functional groups. C-2, C-3, and C-2 & C-4 substituted pyrroles were synthesized in good yield. Symmetrical bis-pyrroles were accessible for the first time using an ironcatalyst. On the basis of the experimental
Facile synthesis of N-substituted pyrroles via microwave-induced bismuth nitrate-catalyzed reaction
作者:Sonya Rivera、Debasish Bandyopadhyay、Bimal K. Banik
DOI:10.1016/j.tetlet.2009.06.002
日期:2009.9
Simple synthesis of N-substituted pyrroles using microwave-induced bismuth nitrate-catalyzed reaction has been accomplished with an excellent yield. A plausible mechanism has been advanced. This reaction also provides a simple method to prepare diverse varieties of N-substituted pyrrole derivatives with less nucleophilic polyaromatic amines. (C) 2009 Published by Elsevier Ltd.
Ultrasound-assisted bismuth nitrate-induced green synthesis of novel pyrrole derivatives and their biological evaluation as anticancer agents
作者:Debasish Bandyopadhyay、Sanghamitra Mukherjee、Jose C. Granados、John D. Short、Bimal K. Banik
DOI:10.1016/j.ejmech.2012.01.055
日期:2012.4
A series of novel N-substituted pyrrole derivatives have been designed and synthesized following ultrasound-assisted and bismuth nitrate-catalyzed eco-friendly route. This reaction has also provided a general method to prepare diverse varieties of N-substituted pyrroles with less nucleophilic polyaromatic amines. Based on H-1 NMR spectroscopy, a plausible mechanistic pathway has been advanced. Cytotoxicity of some selected N-substituted pyrrole derivatives has been evaluated in vitro in a panel of mammalian cancer cell lines which includes liver cancer cell lines (HepG2 and Hepa1-6), colon cancer cell lines (HT-29 and Caco-2), a cervical cancer cell line (HeLa) and NIH3T3 cells. Two compounds, 5-(1H-pyrrol-1-yl)-1,10-phenanthroline (9) and 1-(phenanthren-2-yl)-1H-pyrrole (10) have shown good cytotoxicity against some cancer cell lines. Furthermore, these compounds have exhibited cytotoxic specificity against liver cancer cell lines in vitro when compared with normal cultured primary hepatocytes. (C) 2012 Published by Elsevier Masson SAS.