N-(2-(1 H-吲哚-1-基)苯基)吡啶啉酰胺的钴催化直接CH羰基化反应,用于合成(NH)-吲哚[1,2 - a ]喹喔啉-6(5)H)-骨架已经开发出来。以苯甲酸1,3,5-三甲酸三乙酯(TFBen)作为CO源,并以吡啶甲酸酰胺为无痕导向基团,得到了各种游离的(NH)-吲哚并[1,2 - a ]喹喔啉-6(5 H)-。获得高产(高达88%)。另外,证明了一系列产物衍生化,并且可以通过该方案容易地构建PARP-1抑制剂C的核心片段。
Synthesis of pyrrole and indole quinoxalinone and oxazinone derivatives by intramolecular copper-catalyzed reactions
作者:Victoria A. Vaillard、Roberto A. Rossi、Sandra E. Martín
DOI:10.1039/c1ob05269a
日期:——
Intramolecular N-arylation of pyrrole and indole carboxamides and carboxylates linked with a pendant haloarene by Cu-catalyzed reactions to synthesize pyrrole and indole quinoxalinone and oxazinone derivatives is reported. The ring closure reactions were carried out by conventional heating and MW irradiation. The use of conventional heating affords moderate to good yields of the quinoxalinone and oxazinone
Synthesis of indolo- and pyrrolo[1,2-<i>a</i>]quinoxalinones through a palladium-catalyzed oxidative carbonylation of the <i>C</i><sub>2</sub> position of indole
作者:Attoor Chandrasekhar、Sethuraman Sankararaman
DOI:10.1039/c9ob02703c
日期:——
Cu(OAc)2 as an oxidant in toluene at 80 °C forms the corresponding quinoxalinones as exclusive products in good yields. The catalytically active C-H activated intermediate Pd complex was isolated and characterized for the first time which on exposure to CO gas in toluene at 80 °C gave the corresponding quinoxalinone derivative. On the basis of isolation of the intermediate, a possible mechanism has been proposed
A One-Pot Coupling/Hydrolysis/Condensation Process to Pyrrolo[1,2-<i>a</i>]quinoxaline
作者:Qiliang Yuan、Dawei Ma
DOI:10.1021/jo8008098
日期:2008.7.1
CuI/L-proline-catalyzed coupling of 2-halotrifluoroacetanilides with pyrrole-2-carboxylate esters in DMSO at 80-90 degrees C followed by in situ hydrolysis at 60 degrees C afforded pyrrolo[1,2-a]quinoxalines. Indole-2-carboxylate esters underwent the same process smoothly to provide the corresponding tetracyclic products.