Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 248, Issue -, Pages 211-217Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2019.02.016
Keywords
Carbon nitride; Organic photoredox catalysis; Organic synthesis; Chlorination; Photooxidation
Funding
- Deutsche Forschungsgemeinschaft [DFG-An 156 13-1]
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Halocarbons have tremendous significance for the chemical industry. Arylchlorides and arylbromides are typically prepared via Friedel-Crafts reaction, using oxidative halogenation or employing halogen transfer agents, such as N-chloro- and N-bromosuccineimide. Herein, we show that K-PHI, a photocatalyst of the carbon nitride family, can easily photooxidize halide anions (Cl- Br- ) in aqueous media to promote oxidative halogenation of electron rich aromatic compounds. The technique is convenient, safe and gives the haloaromatic products with excellent yields from non-harmful starting reagents in the most sustainable fashion. We show that a solution of NaCl, mimicking seawater, can be used as a reagent for photochlorination.
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