A new triple cooperative and relay catalysis system featuring the Mannich addition followed by C–C construction and oxydehydrogenation is described. The zirconocene dichloride and trimellitic acid synergic catalysis triggered the Mannich addition and C–C bond construction reactions, while CuO allowed relay catalysis for oxydehydrogenation. This novel strategy demonstrated superior activity for the
Three-component reactions of ethyl/methyl lactate, anilines and aldehydes providing quinolines have been developed via simple iron(III) chloride catalysis without using an additional organic medium or external oxidant. This three-component protocol shows high efficiency and broad substrate tolerance, allowing quick access to diverse quinoline products under neat reaction conditions. The results reported
Efficient synthesis of 3-arylaminopyrroline-2-ones by the tandem reaction of anilines and β,γ-unsaturated α-ketoesters
作者:Yan-Chao Wu、Li Liu、Dong Wang、Yong-Jun Chen
DOI:10.1002/jhet.5570430421
日期:2006.7
A concise and efficient synthetic approach to 3-arylaminopyrroline-2-ones from anilines and β,γ-unsaturatedα-ketoesters in boiling dichloromethane has been developed. This protocol possesses many advantages such as short reaction time, high isolated yields, and expanding substrate scopes. According to the isolated intermediates and controlled reactions, the reaction was tentatively proposed to involve
A new and metal-free three-component method for the synthesis of 2,4-disubstituted quinolines via the reactions of anilines, α-keto acids and alkyl lactates is reported. The reactions proceed in the presence of p-toluene sulfonic acid (p-TSA) and tert-butyl peroxybenzoate (TBPB) to provide diverse quinoline products via the construction of new CC double, C–C single and CN double bonds without producing
报道了一种通过苯胺、α-酮酸和乳酸烷基酯反应合成 2,4-二取代喹啉的新型无金属三组分方法。该反应在对甲苯磺酸 ( p -TSA) 和过氧苯甲酸叔丁酯 (TBPB)的存在下进行,通过构建新的 C C 双键、C-C 单键和 C N 双键来提供多种喹啉产物,而不会产生任何基于质量的有机副产品。值得注意的是,喹啉的抗炎活性已通过测量其抑制脂多糖 (LPS) 诱导的 RAW264.7 细胞释放 NO 的能力来研究,从而鉴定出4i,4t和4x作为体外有效的抗炎化合物。
Base Metal-Controlled Chemodivergent Cyclization of Propargylamines for the Atom-Economic Synthesis of Nitrogen Heterocycles
quinoline-4-carboxylates, while iron-promoted cascade amino Claisen rearrangement, aromatization, and aza-Michael addition afford diverse 2-substituted indole-3-carboxylate derivatives. Excellent selectivity, broad functional group tolerance, mild conditions, and flexible late-stage functionalization illustrate the high efficiency and synthetic utility of this chemodivergent reaction.