Scandium‐ or hafnium‐catalyzed [6+1] annulation reactions of 2‐cyano‐1‐propargyl‐ and 2‐alkynyl‐1‐cyanomethyl‐indoles with Reformatsky reagent delivered 8‐ and 9‐substituted‐azepino[1,2‐a]indole amines in good to high yields.
An efficient method was developed for the synthesis of pyrano[4,3-b]indol-1(5H)-ones, which uses a protic ionic liquid [HTBD+][TFE–] as both the solvent and reaction promoter. The reactions could be efficiently carried out at atmospheric pressures of CO2, and various pyrano[4,3-b]indol-1(5H)-ones bearing versatile functionalities were obtained in moderate to high yields (71–99%).
开发了一种高效的吡喃并[4,3 - b ]吲哚-1(5 H)-酮的合成方法,该方法使用质子离子液体[HTBD + ] [TFE – ]作为溶剂和反应促进剂。该反应可以在大气压的CO 2压力下有效地进行,并以中等至高产率(71-99%)获得了具有多种功能的吡喃并[4,3 - b ]吲哚-1(5 H)-。
Synthesis of 3-aryl-2-aminoquinolines: palladium-catalyzed cascade reactions of gem-dibromovinylanilines with tert-butyl isocyanide and arylboronic acids
作者:Langxi Hu、Weijun Gui、Zichen Liu、Baishan Jiang
DOI:10.1039/c4ra05670a
日期:——
A three-component cascade reactioninvolving gem-dibromovinylanilines, tert-butyl isocyanide and arylboronic acids for the efficient synthesis of 3-aryl-2-aminoquinolines has been developed. The reaction proceeds throughpalladium-catalyzedisocyanideinsertion, intramolecular cyclization of gem-dibromovinylanilines followed by Suzuki coupling with arylboronic acids, and the corresponding products
Facile synthesis of 2-amino-3-bromoquinolines by palladium-catalyzed isocyanide insertion and cyclization of gem-dibromovinylanilines
作者:Baishan Jiang、Langxi Hu、Weijun Gui
DOI:10.1039/c4ra00821a
日期:——
A novel and efficient synthesis of 2-amino-3-bromoquinolines through palladium-catalyzed isocyanide insertion followed by intramolecular cyclization of gem-dibromovinylanilines was developed.
A convenient one-pot synthesis of 2-aroylindoles using a dominopalladium-catalyzed C,N-coupling/carbonylation/C,C-coupling sequence is described. The reaction involved easily prepared 2-gem-dibromovinylanilines and boronic acids under carbon monoxide. Optimized reaction conditions allowed the construction of a wide variety of highly functionalized 2-aroyl-/heteroaroylindoles in satisfactory yields