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 heterocyclic ketene aminals (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
3-酰基色酮,即 3-methoxalyl-、3-aroyl- 和 3-cinnamoylchromones 与杂环烯酮胺 (HKAs) 的多米诺反应通过亲核试剂攻击色酮部分的 C-2 原子进行,吡喃酮开环以及随后的正式 [3+3] 环缩合反应,形成官能化的四环稠合色基 [2,3-b] 吡啶或 2H,3H-咪唑并 [1,2-a] 吡啶。产物分布取决于位于色酮 3 位的酰基类型和 HKA 杂环部分的大小。该产品作为选择性磷酸酶抑制剂显示出相当大的活性。