Immobilization and Continuous Recycling of Photoredox Catalysts in Ionic Liquids for Applications in Batch Reactions and Flow Systems: Catalytic Alkene Isomerization by Using Visible Light

• Published in: Chemistry : a European journal Vol. 21; no. 14; pp. 5350 - 5354
• Main Authors: Fabry, David C., Ronge, Meria A., Rueping, Magnus
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 27.03.2015; WILEY‐VCH Verlag; Wiley; Wiley Subscription Services, Inc
• Subjects: Catalysis; Catalysts; Chemistry; Chemistry, Multidisciplinary; Continuous flow; flow chemistry; immobilization; Ionic liquids; Ions; isomerization; Liquids; Olefins; Phase separation; photocatalyst; Photocatalysts; Physical Sciences; Recycled; Science & Technology; Solvents; RESVERATROL; immobilization; isomerization; COMPLEXES; MECHANISMS; photocatalyst; EXCITED-STATES; STILBENE; OLEFINATION; CHEMISTRY; SINGLET OXYGEN; PHOTOCHEMISTRY; ionic liquids; EFFICIENT; flow chemistry
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201406653

A catalytic (E)‐ to (Z)‐isomerization of olefins using a photoredox catalyst under mild reaction conditions is presented. A variety of (Z)‐alkenes can be prepared in the presence of visible light. A new reaction system allows an easy and efficient scale‐up, as well as a continuous flow process in which the photocatalyst is immobilized in an ionic liquid and continuously recycled by simple phase separation. Catalytic (E)‐ to (Z)‐isomerizations of olefins under mild conditions can be achieved by use of a photosensitizer and visible light. A new reaction system such as depicted allows an easy and efficient scale‐up, as well as continuous flow processes in which the photocatalyst is immobilized in an ionic liquid and continuously recycled by phase separation.