Bi(OTf)<sub>3</sub>-Catalyzed Friedländer Hetero-Annulation: A Rapid Synthesis of 2,3,4-Trisubstituted Quinolines
作者:J. S. Yadav、B. V. Reddy、K. Premalatha
DOI:10.1055/s-2004-822898
日期:——
Polysubstituted quinolines are readily prepared in high yields under extremely mild conditions through a sequential condensation/annulation reaction of 2-aminoaryl ketones and α-methylene ketones using a catalytic amount of bismuth triflate.
Efficient and Rapid Friedlander Synthesis of Functionalized Quinolines Catalyzed by Neodymium(III) Nitrate Hexahydrate
作者:Srinivas Adapa、Ravi Varala、Ramu Enugala
DOI:10.1055/s-2006-950296
日期:2006.11
Friedlander synthesis of quinolines catalyzed by neodymium nitrate [Nd(NO 3 ) 3 ·6H 2 O, 5 mol%] in ethanol at room temperature was achieved in moderate to excellent yields (62-94%).
Abstract Reusable acidic nickel oxide nanoparticles have been synthesized, characterized and applied as a catalyst to convert 2-aminoaryl ketones and β-ketoesters/ketones into the corresponding quinolines in good yields with high selectivity. This could serve as a simple and convenientprocedure for the Friedlander annulations.
Silver Phosphotungstate: A Novel and Recyclable Heteropoly Acid for Friedländer Quinoline Synthesis
作者:J. S. Yadav、B. V. Reddy、P. Sreedhar、R. Srinivasa Rao、K. Nagaiah
DOI:10.1055/s-2004-831185
日期:——
o-Aminoaryl ketones undergo smooth condensation with α-methylene ketones on the surface of silver heteropoly acid (Ag3PW12O40) under mild reaction conditions to afford the corresponding polysubstituted quinolines in excellent yields with high selectivity. The catalyst can be recovered by simple filtration and can be recycled in subsequent reactions.
Molecular iodine: a highly efficient catalyst in the synthesis of quinolinesvia Friedländer annulation
作者:Jie Wu、Hong-Guang Xia、Ke Gao
DOI:10.1039/b514635f
日期:——
A mild and efficient route for the synthesis of quinolines and polycyclic quinolines via Friedlander annulation, utilizing molecular iodine (1 mol%) as a new catalyst, is described.