Exploring the Oxidative Cyclization of Substituted
<i>N</i>
‐Aryl Enamines: Pd‐Catalyzed Formation of Indoles from Anilines
作者:Julia J. Neumann、Souvik Rakshit、Thomas Dröge、Sebastian Würtz、Frank Glorius
DOI:10.1002/chem.201100631
日期:2011.6.20
The direct Pd‐catalyzed oxidative coupling of twoCH‐bonds within N‐aryl‐enamines 1 allows the efficient formation of differently substituted indoles 2. In this cross‐dehydrogenative coupling, many different functional groups are tolerated and the starting material N‐aryl‐enamines 1 can be easily prepared in one step from commercially available anilines. In addition, the whole sequence can also be
Iron-catalyzed aryl C–H and vinyl C–H bonds activation to give valuable substituted indole products was reported. The reaction shows high functional group tolerance.
A facile and efficient method for the synthesis of substituted pyrroles from enaminoesters and nitroolefins is reported. This general procedure provides a wide variety of multisubstituted pyrroles in good to excellent yields under mild reaction conditions.
novel palladium-catalyzed regioselective oxidative carbonylation of tri-substituted alkenes with CO and alcohols for the synthesis of α,β-unsaturated esters has been developed. Experimental studies and DFT calculations suggested that the reaction proceeded through alkoxylation of the palladium(II) catalyst, CO and CC double bond migratory insertion, β-(N)H elimination and tautomerization cascade steps
Cyanuric chloride catalysed rapid conversion of β-ketoesters into β-enaminoesters under mild and solvent-free conditions
作者:V. T. Kamble、N. S. Joshi、S. T. Atkore
DOI:10.1007/bf03245892
日期:2011.9
Cyanuric chloride is shown to be an extremely efficient catalyst for the synthesis of beta-enaminoesters from beta-ketoesters under solvent-free conditions by grinding in a mortar with pestle at 25 degrees C. A short reaction time, an inexpensive and easily available catalyst, mild reaction conditions and excellent yields of the products are attractive features of this methodology.