Aggregative activation and heterocyclic chemistry I complex bases promoted arynic cyclisation of imines or enaminoketones; regiochemical synthesis of indoles
摘要:
The complex base NaNH2-t-BuONa allowed expeditious syntheses of indoles by arynic cyclisation of imines or enaminoketones prepared from halogeno anilines and carbonyl derivatives. Unstable imines may be used without purification, complex bases being unsensitive to impurities. It is showed that this kind of reaction may be applied to mixture of substrates suitably halogenated on the benzene ring. Formation of three components aggregates is proposed to explain a number of observations.
An Improved Method for the Synthesis of Carbazolones by Palladium/Copper-Catalyzed Intramolecular Annulation of N-Arylenaminones
作者:Jing-Hua Li、Bojie Weng、Rui Liu
DOI:10.1055/s-0030-1258141
日期:2010.9
via the condensation of arylamines with 1,3-cyclodiketones followed by intramolecular oxidative cyclization catalyzed by palladium acetate and copper acetate in ethanol under an oxygen atmosphere was established. The improved method has the advantage of easily available starting materials and affords good yields. carbazolones - intramolecular oxidative cyclization - oxygen - palladium acetate- copper
N,N-Dimethylpyridin-4-amine (DMAP) based ionic liquids: evaluation of physical properties via molecular dynamics simulations and application as a catalyst for Fisher indole and 1H-tetrazole synthesis
作者:Sarfaraz Ali Ghumro、Sana Saleem、Mariya al-Rashida、Nafees Iqbal、Rima D. Alharthy、Shakil Ahmed、Syed Tarique Moin、Abdul Hameed
DOI:10.1039/c7ra06824g
日期:——
liquids (ILs) as a green alternative to traditional solvents in organic synthesis. The use of ILs as catalysts has also increased in recent years. Herein we the report synthesis of new N,N-dimethylpyridin-4-amine (DMAP) based ionic liquids (ILs) as new and efficient catalysts for the facile synthesis of indoles (via Fischerindolesynthesis), and 1H-tetrazoles (via click chemistry). The method is environmentally
The complex base NaNH2-tBuONa allows expeditious synthesis of indole derivatives by arynic cyclization of imines or enamines of chloroanilines. Unstable may be used without purification, complex bases being unsensitive to impurities.
We described an Rhodium(III)-catalyzed divergent C−H bond functionalization of N-aryl amidines with iodonium ylides. Carbazolones and zwitterionic salts were diversely constructed through intermolecular annulation and intramolecular proton transfer under the different reaction conditions. This protocol is operationally simple and tolerates a variety of functional groups. The efficient post-modification
An efficient protocol for synthesizing carbazolones from anilines and 1,3-diketones by copper-catalyzed intramolecular oxidative C–C coupling through the selectiveactivation of the C–H bond is reported.