A facile route to flavone and neoflavone backbones via a regioselective palladium catalyzed oxidative Heck reaction
A straightforward and atom-economical base-free palladium-catalyzed regioselective direct arylation of coumarins and chromenones is devised. This protocol is compatible with a wide variety of electron-donating and -withdrawing substituents and allows construction of various biologically important flavone and neoflavone backbones.
Khoobi, Mehdi,Alipour, Masoumeh,Zarei, Samaneh,Jafarpour, Farnaz,Shafiee, Abbas
supporting information; experimental part
p. 2985 - 2987
(2012/04/04)
Microwave-promoted, one-pot, solvent-free synthesis of 4-arylcoumarins from 2-hydroxybenzophenones
4-Arylcoumarins are synthesized in very good yields through solvent-free microwave irradiation of 2-hydroxybenzophenones and alkyl malonate in the presence of DBU. The onepot synthesis is carried out with Knoevenagel condensation, intramolecular lactonization, and decarboxylation reactions. The method can be applied to a broad scope of neoflavonoids.
Crecente-Campo, Jose,Vazquez-Tato, M. Pilar,Seijas, Julio A.
experimental part
p. 4130 - 4135
(2010/09/18)
Selective phenylation of naphthoquinones and coumarins using diphenylmercury
Under the influence of UV light, 1,4-naphthoquinones 1-5 and coumarins 6-10 on reaction with diphenylmercury in acetonitrile under nitrogen atmosphere give corresponding 2-phenyl-1,4-naphthoquinones 11-15 and 4-phenylcoumarins 16-20.
Thaplial, Prakash Chander
p. 477 - 479
(2007/10/03)
More Articles about upstream products of 108979-94-8