Tandem Visible Light-Mediated Radical Cyclization–Divinylcyclopropane Rearrangement to Tricyclic Pyrrolidinones
摘要:
Visible light promoted single electron reduction of bromocyclopropyl cyclization scaffolds enabled by photoredox catalysis initiates a novel tandem radical cyclization/sigmatropic rearrangement to generate tricyclic pyrrolidinones having considerable molecular complexity from simple, readily available starting materials. Furthermore, subtle variations to substrate structure afford a wide array of reaction diversity.
Tandem Visible Light-Mediated Radical Cyclization–Divinylcyclopropane Rearrangement to Tricyclic Pyrrolidinones
摘要:
Visible light promoted single electron reduction of bromocyclopropyl cyclization scaffolds enabled by photoredox catalysis initiates a novel tandem radical cyclization/sigmatropic rearrangement to generate tricyclic pyrrolidinones having considerable molecular complexity from simple, readily available starting materials. Furthermore, subtle variations to substrate structure afford a wide array of reaction diversity.
作者:Joseph W. Tucker、Yuan Zhang、Timothy F. Jamison、Corey R. J. Stephenson
DOI:10.1002/anie.201200961
日期:2012.4.23
Photoredoxcatalysis: A variety of organic transformations mediated by visible‐light‐active photoredox catalysts have been conducted in a photochemical flow reactor. The reactor design is very simple and can be easily implemented in any laboratory (see picture). In addition, this reactor afforded a marked increase in the reaction rate compared to those observed in typical batch (round bottom flask)