Reactions of 3-acylchromones with dimethyl 1,3-acetonedicarboxylate and 1,3-diphenylacetone: one-pot synthesis of functionalized 2-hydroxybenzophenones, 6H-benzo[c]chromenes and benzo[c]coumarins
Reactions of 3-Acylchromones with Heterocyclic Ketene Aminals: One-Pot Synthesis and Phosphatase Inhibitory Activity of Fused Pyridine Derivatives
作者:Iryna Savych、Syeda Abida Ejaz、Syed Jawad Ali Shah、Viktor O. Iaroshenko、Alexander Villinger、Vyacheslav Ya. Sosnovskikh、Jamshed Iqbal、Afshin Abbasi、Peter Langer
DOI:10.1002/ejoc.201601138
日期:2017.1.3
Domino reactions of 3-acylchromones, namely 3-methoxalyl-, 3-aroyl- and 3-cinnamoylchromones, with heterocyclicketeneaminals (HKAs) proceed by attack of the nucleophile on the C-2 atom of the chromone moiety, pyrone ring-opening and subsequent formal [3+3] cyclocondensation with formation of functionalized tetracyclic fused chromeno[2,3-b]pyridines or 2H,3H-imidazo[1,2-a]pyridines. The product distribution