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- Title
Versatile Visible‐Light‐Driven Synthesis of Asymmetrical Phosphines and Phosphonium Salts.
- Authors
Arockiam, Percia Beatrice; Lennert, Ulrich; Graf, Christina; Rothfelder, Robin; Scott, Daniel J.; Fischer, Tillmann G.; Zeitler, Kirsten; Wolf, Robert
- Abstract
Asymmetrically substituted tertiary phosphines and quaternary phosphonium salts are used extensively in applications throughout industry and academia. Despite their significance, classical methods to synthesize such compounds often demand either harsh reaction conditions, prefunctionalization of starting materials, highly sensitive organometallic reagents, or expensive transition‐metal catalysts. Mild, practical methods thus remain elusive, despite being of great current interest. Herein, we describe a visible‐light‐driven method to form these products from secondary and primary phosphines. Using an inexpensive organic photocatalyst and blue‐light irradiation, arylphosphines can be both alkylated and arylated using commercially available organohalides. In addition, the same organocatalyst can be used to transform white phosphorus (P4) directly into symmetrical aryl phosphines and phosphonium salts in a single reaction step, which has previously only been possible using precious metal catalysis.
- Subjects
PHOSPHONIUM compounds; PRECIOUS metals; PHOSPHINES; CATALYSIS
- Publication
Chemistry - A European Journal, 2020, Vol 26, Issue 69, p16374
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202002646