General methodology for synthesis of fused tricyclic oxazino-2-quinolones under phase-transfer catalyzed conditions
摘要:
A one-pot synthesis of substituted oxazino-2-quinolones is described. The cornerstone of this methodology involves PTC catalyzed addition of an ethylene dihalide to a quinol to generate the corresponding O-alkylated intermediate in situ followed by ring closing and subsequent formation of a carbonyl group in the oxazinoquinolone in a one-pot sequence. (C) 2004 Elsevier Ltd. All rights reserved.
Basic Alumina-Supported Synthesis of Aryl-Heteroarylmethanes<i>via</i>Palladium Catalyzed Cross-Coupling under Microwave Irradiation
作者:Krishnendu B. Sahu、Arindam Maity、Shyamal Mondal、Rupankar Paira、Pritam Saha、Subhendu Naskar、Abhijit Hazra、Sukdeb Banerjee、Nirup B. Mondal
DOI:10.1002/jhet.1099
日期:2013.2
A basicalumina-supportedmicrowave assisted simple methodology has been developed for the synthesis of aryl-heteroaryl methanes (benzylated quinolones) via transition metal catalyzedcross-coupling reaction of halo substituted polynuclear oxa-aza quinolones with benzyl indium, an organometallic reagent easily derived from commercially available benzyl bromide.
Synthesis of polycyclic fused 2-quinolones in aqueous micellar system
作者:Subhendu Naskar、Pritam Saha、Rupankar Paira、Abhijit Hazra、Priyankar Paira、Shyamal Mondal、Arindam Maity、Krishnendu B. Sahu、Sukdeb Banerjee、Nirup B. Mondal
DOI:10.1016/j.tetlet.2010.01.030
日期:2010.3
A high yielding green protocol has been developed for the synthesis of tri-, tetra-, and pentacyclic fused 2-quinolones in micellar medium. The method is more effective compared to phase-transfer catalytic (PTC) method in terms of the yield of the product as well as the reaction time. It is operationally simple as well as environmentally benign. (C) 2010 Elsevier Ltd. All rights reserved.