One-pot access to pyridocoumarins via Povarov-hydrogen transfer cascade under auto-tandem catalysis of iodine in aqueous micelles
作者:Nemai C. Ganguly、Sumanta Chandra
DOI:10.1016/j.tetlet.2014.01.078
日期:2014.2
A cascade of inverse electron demand Diels-Alder reaction of 6-aminocoumarin-derived aldimines with an excess of styrene and oxidative aromatization of the formal Povarov adducts under autotandem iodine catalysis in aqueous micellar conditions provides direct access to a small library of substituted pyridine annulated coumarins in good to acceptable yields (12 examples). The unusual formation of linearly annulated pyridocoumarins under essentially neutral conditions is a remarkable feature of the protocol. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis Through Three-Component Reactions Catalyzed by FeCl<sub>3</sub>of Fused Pyridocoumarins as Inhibitors of Lipid Peroxidation
作者:Theodoros S. Symeonidis、Dimitra J. Hadjipavlou-Litina、Konstantinos E. Litinas
DOI:10.1002/jhet.1791
日期:2014.5
2,4‐Diphenyl substituted fusedpyridocoumarins have been synthesized by one‐pot three‐component domino reactions of aminocoumarins, benzaldehyde, and phenylacetylene by using FeCl3 (10%) as catalyst under reflux or MW irradiation. The new compounds were tested as inhibitors of lipidperoxidation. The 7,9‐diphenyl‐2H‐pyrano[2,3‐g]quinolin‐2‐one presents interesting results and could serve as lead compound
以氨基香豆素,苯甲醛和苯乙炔的一锅式三组分多米诺反应,以FeCl 3(10%)为催化剂,在回流或微波辐射下,合成了2,4-二苯基取代的稠合吡啶香豆素。测试了新化合物作为脂质过氧化抑制剂。7,9-二苯基-2- H-吡喃[2,3 - g ]喹啉-2-酮呈现有趣的结果,可以用作先导化合物。