Cu(I)-Catalyzed Oxygen and Nitrogen Nucleophiles Triggered Regioselective Synthesis of Furo/Pyrrolo-Annulated Quinolines
作者:Ritush Kumar、Atish Chandra、Bilal Ahmad Mir、Gaurav Shukla
DOI:10.1021/acs.joc.9b00662
日期:2019.9.6
Cu(I)-catalyzedintramolecularannulation of o-ethynylquinoline-3-carbaldehydes leads to the synthesis of alkoxy/imidazole-substituted 1,3-dihydrofuro[3,4-b]quinolines via C–O and C–N bond formation. The scope of the reaction was further extended to o-ethynylquinoline-3-carbonitriles for the synthesis of alkoxy-substituted 3H-pyrrolo[3,4-b]quinolines using alcohols as nucleophiles. These reactions
Cu(I) 催化的o -ethynylquinoline-3-carbaldehydes 的分子内环化导致通过 C-O 和 C-N 键的形成合成烷氧基/咪唑取代的 1,3-二氢呋喃[3,4- b ] 喹啉。该反应的范围进一步扩展到邻乙炔基喹啉-3-腈,用于使用醇作为亲核试剂合成烷氧基取代的 3 H-吡咯并[3,4- b ]喹啉。这些反应区域选择性地有利于所有环化过程中的 5 -exo-dig环化。
Silver-catalyzed furoquinolines synthesis: from nitrogen effects to the use of silver imidazolatepolymer as a new and robust silver catalyst
Silver-catalyzed tandem acetalization and cycloisomerization reactions were found to lead to various furoquinolines, and a nitrogen effect was noticed for AgOTf reactivity, since the cyclization mode switched from 6-endo-dig to 5-exo-dig; from these observations silver imidazolate polymer is proposed as a stable silver catalyst.