Synthesis of Highly Substituted 2-Arylindoles via Copper-Catalyzed Coupling of Isocyanides and Arylboronic Acids
作者:Laurel M. Heckman、Zhi He、Timothy F. Jamison
DOI:10.1021/acs.orglett.8b01132
日期:2018.6.1
Highly functionalized 2-arylindoles were synthesized from 2-alkenylarylisocyanides and arylboronicacids using a simple, inexpensive copper catalyst. The reaction exhibits excellent functional group tolerance for both the arylisocyanide and boronic acid coupling partners. To avoid the direct handling of the pungent arylisocyanide starting materials, continuous flow chemistry is further demonstrated
2-borylindoles via the copper(I)-catalyzed borylative cyclization of 2-alkenylphenyl isocyanides using diboronate. The reaction proceeds at room temperature under neutral conditions and exhibits high tolerance to functional groups, such as Br, CO2R, COR, CONMe2, and CN. The 2-borylindoles synthesized in the present study can be elaborated into an array of indole-based derivatives, for example, through the
polycyclic compoundsfrom amines tethered with an alkenyl (or alkynyl) group and divinyl carbonates is described. In the presence of Pd(0)-catalyst, an active zwitterionic allylpalladium species is generated and undergoes allylic amination with various amines followed by Diels–Alder reaction to form various polycyclic N-heterocyclic products, including hydrophenanthridines, hydrobenzo[c]azepines (hydro)isoindoles
描述了一种有效的级联方法,用于从与链烯基(或炔基)基团和碳酸二乙烯酯相连的胺构建含氮多环化合物。在 Pd(0)-催化剂存在下,生成活性两性离子烯丙基钯物种,并与各种胺进行烯丙基胺化,然后进行 Diels-Alder 反应,形成各种多环N-杂环产物,包括氢菲啶、氢苯并[ c ]氮杂(氢)isoindoles 和 hydrobenzo[ cd ]indoles。