485-61-0Relevant articles and documents
4(1H)-quinolinone alkaloids an efficient synthesis of graveoline by palladium-catalysed reductive N-heterocyclisation
Annunziata,Cenini,Palmisano,Tollari
, p. 495 - 501 (1996)
An efficient synthesis of the 4H-quinolone alkaloid graveoline has been achieved by a route featuring an Pd(II)-catalysed reductive N-heterocyclisatton [ CO(3 MPa), Pd(TMB)2, TMPhen, 170 °C, 3h] of 2′-nitrochalcone as a key step.
Access to 2-Alkyl/Aryl-4-(1 H)-Quinolones via Orthogonal "nH3" Insertion into o-Haloaryl Ynones: Total Synthesis of Bioactive Pseudanes, Graveoline, Graveolinine, and Waltherione F
Mehta, Goverdhan,Nerella, Sharanya,Pabbaraja, Srihari,Singh, Shweta
, (2020/02/22)
An efficient one-pot synthesis of 4-(1H)-quinolones through an orthogonal engagement of diverse o-haloaryl ynones with ammonia in the presence of Cu(I), involving tandem Michael addition and ArCsp2-N coupling, is presented. The substrate scope of this convenient protocol, wherein ammonium carbonate acts as both an in situ ammonia source and a base toward diverse 2-substituted 4-(1H)-quinolones, has been mapped and its efficacy validated through concise total synthesis of bioactive natural products pseudanes (IV, VII, VIII, and XII), graveoline, graveolinine, and waltherione F.
Lewis acid-triggered selective zincation of chromones, quinolones, and thiochromones: Application to the preparation of natural flavones and isoflavones
Klier, Lydia,Bresser, Tomke,Nigst, Tobias A.,Karaghiosoff, Konstantin,Knochel, Paul
supporting information; experimental part, p. 13584 - 13587 (2012/10/08)
A Lewis acid-triggered zincation allows the regioselective metalation of various chromones and quinolones. In the absence of MgCl2, a C(3) zincation is observed, whereas in the presence of MgCl2 or a related Lewis acid, C(2) zincation occurs. Applications to a natural flavone, isoflavone, and quinolone are shown.