Synthesis of Indoles Using Visible Light: Photoredox Catalysis for Palladium-Catalyzed CH Activation
作者:Jochen Zoller、David C. Fabry、Meria A. Ronge、Magnus Rueping
DOI:10.1002/anie.201405478
日期:2014.11.24
A combined palladium‐ and photoredox‐catalyzed CH olefination enables the synthesis of indoles. By using visible light, the direct CHactivation of aromatic enamines can be achieved and a variety of indole derivatives can be obtained in good yields under mild reaction conditions.
Exploring the Oxidative Cyclization of Substituted
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‐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
Synthesis of Polysubstituted Pyrroles via PhI(OAc)2-Mediated Oxidative Coupling of Enamine Esters and Ketones
作者:Wei Yu、Jun-Yan Wang、Su-Ping Liu
DOI:10.1055/s-0029-1217743
日期:2009.9
Enamine esters or ketones could undergo homocoupling by the action of (diacetoxyiodo)benzene in the presence of BF 3 -OEt 2 , giving rise to pyrrole products. This reaction could be used to synthesize symmetric polysubstituted pyrroles. Some asymmetric polysubstituted pyrroles could also be prepared using this protocol.
Design, synthesis and properties of a new tricyclic series of selective 5-HT2C receptor antagonists are reported. Conformational analysis of a 2-phenyl-dihydropyrrolone scaffold suggested that ring fusion, locking coplanarity between the rings of this moiety, might be tolerated by the 5-HT2C receptor. An interesting effect of this is the change of the nature of the carbon-carbon double bond of the lactam ring from vinylic to aromatic. The changes were found to result in a favourable profile at both, receptor and in vivo level. (c) 2006 Elsevier Ltd. All rights reserved.