title: Lithium phosphonate umpolung catalysts: Do fluoro substituents increase the catalytic activity?
abstract: Fluorinated and nonfluorinated phosphonates are employed as precatalysts in lithium phosphonate catalyzed cross benzoin couplings. Surprisingly, a decreased catalytic activity for the fluorinated precatalysts compared to the nonfluorinated systems is observed. Furthermore, the ring size of six, seven and nine membered ring catalysts appears not to be crucial for their catalytic activity.
authors: Department für Chemie, Universität zu Köln, Greinstr. 4, D-50939 Köln, Germany.
authors: Anca
authors: A
authors: Gliga
authors: Bernd
authors: B
authors: Goldfuss
authors: Jörg M
authors: JM
authors: Neudörfl