Cu(II)-Catalyzed 6π-Photocyclization of Non-6π Substrates
摘要:
This research successfully achieved a Cu(II)-catalyzed 6 pi-photocyclization of non-6 pi substrates. The photo-enolization converts ortho-alkylphenyl alkynl ketones into a triene-type intermediate which undergoes the subsequent 6 pi-photo- facilitates both photoenolization and 6 pi-photocyclization. This research highlighted the tandem reaction strategy and the importance of metal catalysis in photochemistry.
Light-enabled, AlCl<sub>3</sub>-catalyzed regioselective intramolecular nucleophilic addition of non-nucleophilic alkyls to alkynes
作者:Yanbin Zhang、Ruiwen Jin、Guangxing Pan、Hao Guo
DOI:10.1039/d0cc04636a
日期:——
regioselective intramolecularnucleophilic cyclization of alkynes using non-nucleophilic alkyls as the nucleophile is reported. Upon photoexcitation, o-alkylphenyl alkynyl ketones can be transferred into (E)-photoenols. Thus, a nucleophilic methylene is formed from the non-nucleophilic alkyl. An AlCl3 catalyst can stabilize the (E)-photoenol intermediate and facilitate further intramolecularnucleophilic cyclization
Simple and Efficient One‐Pot, Three‐Component, Solvent‐Free Synthesis of β‐Enaminones via Sonogashira Coupling–Michael Addition Sequences
作者:Sanjay S. Palimkar、Vijaykumar S. More、Kumar V. Srinivasan
DOI:10.1080/00397910801914343
日期:2008.4
A simple, efficient, and environmentally friendly one-pot, three-component synthesis of beta-enaminones via Sonogashira coupling-Michael addition sequences under solvent-free conditions has been reported. Also the synthesis of beta-enaminones has been achieved in high yields by the direct reaction of amines with ynones under solvent-free conditions.