“Quick and click” assembly of functionalised indole rings via metal-promoted cyclative tandem reactions
作者:Francesca Capitta、Lidia De Luca、Andrea Porcheddu
DOI:10.1039/c4ra12000k
日期:——
An efficient and convenient synthesis of a variety of decorated indoles using a three-component tandem metal-catalysed process is described.
描述了一种高效且方便的合成多种修饰吲哚的方法,该方法使用了三组分串联金属催化过程。
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。
Unusual 1,2-aryl migration in Pd(<scp>ii</scp>)-catalyzed aza-Wacker-type cyclization of 2-alkenylanilines
作者:So Won Youn、So Ra Lee
DOI:10.1039/c5ob00361j
日期:——
Hegedus aza-Wacker indole synthesis, we were intrigued with the fate of the aminopalladation intermediate if syn β-hydrogen is made inaccessible or unavailable. In contrast to our previously reported β-carbon elimination, cyclization of a variety of 2-alkenylaniline substrates under electrophilic palladium conditions unexpectedly afforded C3-substituted indoles. This unusual 1,2-migratory process was
DMSO/SOCl<sub>2</sub>-mediated C(sp<sup>2</sup>)–H amination: switchable synthesis of 3-unsubstituted indole and 3-methylthioindole derivatives
作者:Jingran Zhang、Xiaoxian Li、Xuemin Li、Haofeng Shi、Fengxia Sun、Yunfei Du
DOI:10.1039/d0cc07453e
日期:——
The reaction of 2-alkenylanilines with SOCl2 in DMSO was found to selectively afford 3-unsubstituted indoles and 3-methylthioindoles. This switchable approach was found to be temperature-dependent: at room temperature, the reaction afforded 3-unsubstituted indoles through intramolecular cyclization and elimination; while at higher temperature, the reaction gave 3-methylthioindoles via further electrophilic