描述了涉及芳基乙炔基-N-甲基亚氨基二乙酸硼酸酯的串联金催化环异构化/Suzuki 交叉偶联序列。这种串联两步方法将均相金催化的温和性与N-甲基亚氨基二乙酸 (MIDA) 硼酸酯的多功能性相结合,能够快速组装各种芳基取代的杂环,而无需分离或纯化任何杂环 MIDA 硼酸酯中间体。该方法的另一个主要优点是可以由单一 MIDA 硼酸酯炔前体制备多种带有不同芳基的杂环。
A concise approach to indoles via oxidative C–H amination of 2-alkenylanilines using dioxygen as the sole oxidant
作者:Ai-Lun Ma、Yin-Long Li、Jian Li、Jun Deng
DOI:10.1039/c6ra03378d
日期:——
An operationally simple and environmental friendly approach to indole derivatives from N-Ts-2-alkenylanilines has been achieved, which involves an oxidative intramolecular C–H amination by using molecular oxygen as sole oxidant.
Metal‐ and Oxidant‐Free Electrosynthesis of Heterocycles from 1,2‐Diarylalkene Derivatives
作者:Eunsoo Yu、Hyungguk Kim、Cheol‐Min Park
DOI:10.1002/adsc.202200847
日期:2022.12.8
Synthesis of heterocycles from 1,2-diarylalkene derivatives through electrosynthesis under metal- and oxidant-free conditions has been discovered. Cathodic reduction of 2-alkenylbenzoic acid or anodic oxidation of 2-alkenylbenzamide, 2-alkenylphenol and 2-alkenylaniline leads to the formation of reactive radical intermediates which afford corresponding phthalide, isochroman-1-one, isoindolin-1-one
作者:Joshi, Om Prakash、Thirumoorthi, Ramalingam、Pardasani, Ram T.、Ray, Sriparna、Dash, Chandrakanta
DOI:10.1039/d4ra03485f
日期:——
Bioactive heterocycles such as benzofuran and indole derivatives were synthesized from commercially available 2-iodoarenes and alkynes via domino Sonogashira coupling followed by cyclization reaction using well-defined palladium PEPPSI (Pyridine Enhanced Precatalyst Preparation Stabilization and Initiation) complexes (2a and 2b). These reactions tolerate a variety of 2-iodoarenes and diversely substituted
生物活性杂环如苯并呋喃和吲哚衍生物是由市售的 2-碘芳烃和炔烃通过多米诺 Sonogashira 偶联合成的,然后使用明确的钯 PEPPSI(吡啶增强预催化剂制备稳定和引发)络合物进行环化反应( 2a和2b )。这些反应可耐受多种 2-碘芳烃和多种取代的末端炔烃,从而在露天气氛中以中等至良好的产率产生相应的产物。特别是,通过相应的 1,2,3-三唑-5-亚基(MIC:介离子卡宾)、PdCl 2 、KI 和 K 2 CO 的反应,以良好的收率合成了两种钯 ( II ) PEPPSI 配合物2a和2b 3在 110 °C 的吡啶中,并通过各种光谱技术(包括 NMR 光谱、IR 光谱、HRMS 和元素分析研究)进行结构表征。配合物2b还通过 X 射线晶体学进行了表征。
Tandem cycloisomerization/Suzuki coupling of arylethynyl MIDA boronates
作者:Julian M.W. Chan、Giovanni W. Amarante、F. Dean Toste
DOI:10.1016/j.tet.2011.04.011
日期:2011.6
involving arylethynyl-N-methyliminodiacetic acid boronates is described. Combining the mildness of homogeneous gold catalysis with the versatility of N-methyliminodiacetic acid (MIDA) boronates, this tandem two-step method enables the rapid assembly of various aryl-substituted heterocycles without having to isolate or purify any heterocyclic MIDAboronate intermediates. Another major advantage of this
描述了涉及芳基乙炔基-N-甲基亚氨基二乙酸硼酸酯的串联金催化环异构化/Suzuki 交叉偶联序列。这种串联两步方法将均相金催化的温和性与N-甲基亚氨基二乙酸 (MIDA) 硼酸酯的多功能性相结合,能够快速组装各种芳基取代的杂环,而无需分离或纯化任何杂环 MIDA 硼酸酯中间体。该方法的另一个主要优点是可以由单一 MIDA 硼酸酯炔前体制备多种带有不同芳基的杂环。