4812-86-6Relevant articles and documents
Synthesis of 3-aryl-4-(N-aryl)aminocoumarins via photoredox arylation and the evaluation of their biological activity
Carneiro, Leonardo S.A.,Almeida-Souza, Fernando,Lopes, Yanne S.C.,Novas, Rachel C.V.,Santos, Kaique B.A.,Ligiero, Carolina B.P.,Calabrese, Kátia da S.,Buarque, Camilla D.
, (2021/07/22)
A new series of 3-aryl-4-(N-aryl)aminocoumarins was synthesized in two steps starting from the natural product 4-hydroxycoumarin using the photoredox catalysis for the key step. These conditions reactions allowed to make C[sbnd]C bonds is up to 95% yields
Regioselective Synthesis of 4,5-Dihydro-6H-oxepino[3,2-c]chromene-2,6(3H)-diones through Palladium-Catalyzed Intramolecular Alkoxycarbonylation of 3-Allyl-4-hydroxycoumarins
Sosa, D. Oliver,Almaraz, Karla,Amézquita-Valencia, Manuel
supporting information, p. 4682 - 4687 (2019/08/01)
Seven-membered ring lactones fused to coumarin scaffolds were obtained via a palladium-catalyzed regioselective intramolecular alkoxycarbonylation under a CO atmosphere. Cyclocarbonylation of 3-allyl-4-hydroxycoumarin derivatives was accessed in the absen
NH4OAc-promoted cascade approach towards aberrant synthesis of chromene-fused quinolinones
Kumari, Santosh,Abdul Shakoor,Markad, Datta,Mandal, Sanjay K.,Sakhuja, Rajeev
, p. 705 - 714 (2019/01/04)
A concise cascade strategy for the synthesis of 6H-chromeno[4,3-b]quinolin-6-ones was developed from 4-hydroxycoumarins and arylhydrazine hydrochlorides in DMSO. The synthetic strategy relies on dual role of ammonium acetate in generating 4-aminophenyl coumarin from arylhydrazine via aryl radical formation, and Csp2-H formylation of coumarin using DMSO as a methine source. The strategy is scalable, and an array of arylhydrazine hydrochlorides delivered chromene-fused quinolinones in good to excellent yields.