An efficient ligand-free ferric chloride catalyzed synthesis of annulated 1,4-thiazine-3-one derivatives
作者:K.C. Majumdar、Debankan Ghosh
DOI:10.1016/j.tetlet.2014.04.005
日期:2014.5
quinolone-annulated 1,4-thiazine-3-one derivatives has been achieved by using sodium sulfide as the sulfur source and ferricchloride as catalyst in a ligand-free condition. The synthetic procedure is simple, inexpensive, and affords the products in good yields. This methodology is also applicable to naphthalene and benzene systems.
Iron/Palladium-Catalyzed Intramolecular Hydroamination: An Expedient Synthesis of Pyrrole-Annulated Coumarin and Quinolone Derivatives
作者:K. Majumdar、Nirupam De、B. Roy
DOI:10.1055/s-0030-1258311
日期:2010.12
A highly efficient intramolecular hydroamination reaction of heterocycle-centered aminoalkynes using both substituted and free amines catalyzed by PdCl2/FeCl3 catalytic system to form the biologically important pyrrolocoumarin and pyrroloquinolone derivatives is reported. The use of both aliphatic and aromatic substituted alkynes with different heterocyclic skleton in this strategy demonstrated the
Synthesis of novel pyrano[3,2-f]quinoline, phenanthroline derivatives and studies of their interactions with proteins: An application in mammalian cell imaging
A series of tri-cyclic pyrano[3,2-f]quinoline and phenanthroline derivatives have been synthesized by a HCl-mediated 6-'endo-trig' Michael type ring closure reaction of 6-amino-5-(3-hydroxy-3-methylbut-1-ynyl)-2H-chromen-2-one in excellent yields. The process is very simple, facile and inexpensive and can provide a diverse range of substituted quinoline derivatives from simple and easily available starting materials. Moreover, the synthesized derivatives exhibit staining property to the cultured HeLa cells after fixing and can be used as fluorophores which can bind with protein molecule. (C) 2013 Published by Elsevier Masson SAS.
A new strategy for the synthesis of coumarin- and quinolone-annulated pyrroles via Pd(0) mediated cross-coupling followed by Cu(I) catalyzed heteroannulation
作者:K.C. Majumdar、Shovan Mondal
DOI:10.1016/j.tetlet.2008.02.044
日期:2008.4
The sequential coupling and cyclization reactions between aryl halides and (trimethylsilyl) acetylene (TMSA) with concurrent elimination of the TMS substituent, allows a straightforward synthesis of substituted pyrano[3,2-e]indolone and pyrrolo[3,2-f]quinolone derivatives in excellent yields. (C) 2008 Elsevier Ltd. All rights reserved.