Jump to main content
Jump to site search


Solvent-free coupling of aryl halides with pyrroles applying visible-light photocatalysis

Author affiliations

Abstract

A novel reactor for solvent-free, visible-light-driven photocatalytic transformations was developed. By rotation of the reaction vessel, the reaction mixture forms a thin film, which allows efficient excitation of the photocatalyst. The reactor was used for the coupling of aryl halides with pyrrole derivatives and phosphites, applying rhodamine 6G as the photocatalyst and DIPEA as the sacrificial electron donor. The necessary amounts of photocatalyst, trapping reagent, and sacrificial electron donor were reduced significantly compared to those for literature known reactions in solution, while isolating the products in moderate to good yields. In general terms, this solvent-free methodology is an interesting alternative to solution photocatalysis due to the presence of high mole fractions of trapping reagent, the exclusion of by-products formed with the solvent, and the reduction of toxic solvent waste.

Graphical abstract: Solvent-free coupling of aryl halides with pyrroles applying visible-light photocatalysis

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 04 Dec 2016, accepted on 27 Mar 2017 and first published on 27 Mar 2017


Article type: Paper
DOI: 10.1039/C6RE00220J
Citation: React. Chem. Eng., 2017, Advance Article
  •   Request permissions

    Solvent-free coupling of aryl halides with pyrroles applying visible-light photocatalysis

    M. Obst, R. S. Shaikh and B. König, React. Chem. Eng., 2017, Advance Article , DOI: 10.1039/C6RE00220J

Search articles by author