Chemistry Letters, Vol.33, No.8, 1028-1029, 2004
Evaluation of sigma-donating ability of a 9-phosphatriptycene and its application to catalytic reactions
The low sigma-donating ability of 9-phosphatriptycene 1 was revealed by cyclic voltammetry and theoretical calculations. The tungsten complex of 1 was synthesized and the IR and NMR spectroscopic data of the complex also suggested the low sigma-donating ability of 1. 1 was shown to be effective as a ligand in the palladium-catalyzed reactions, the Stille coupling and the Heck reaction.