Search results for "triphenylphosphane"
showing 4 items of 4 documents
CCDC 143722: Experimental Crystal Structure Determination
2001
Related Article: T.Grob, G.Seybert, W.Massa, F.Weller, R.Palaniswami, A.Greiner, K.Dehnicke|2000|Angew.Chem.,Int.Ed.|39|4373|doi:10.1002/1521-3773(20001201)39:23<4373::AID-ANIE4373>3.0.CO;2-K
CCDC 1532063: Experimental Crystal Structure Determination
2017
Related Article: Benedict Kemper, Maximilian von Gröning, Vanessa Lewe, Daniel Spitzer, Tobias Otremba, Natascha Stergiou, Dieter Schollmeyer, Edgar Schmitt, Bart Jan Ravoo, Pol Besenius|2017|Chem.-Eur.J.|23|6048|doi:10.1002/chem.201700588
CCDC 142589: Experimental Crystal Structure Determination
2001
Related Article: T.Grob, G.Seybert, W.Massa, F.Weller, R.Palaniswami, A.Greiner, K.Dehnicke|2000|Angew.Chem.,Int.Ed.|39|4373|doi:10.1002/1521-3773(20001201)39:23<4373::AID-ANIE4373>3.0.CO;2-K
The first catalytic method for Heck alkynylation of unactivated aryl bromides (copper-free Sonogashira) in an ionic liquid: 1 mol-percent palladium/t…
2007
Herein we report the studies of Heck alkynylation (copper-free Sonogashira) with aryl halides (I, Br, Cl) employing various metallic precursors, tertiary phosphanes and bases in [BMIM][BF4] as the solvent. As a result, we provide the first method that allows the coupling of a large array of substrates, either activated or deactivated bromides in an ionic liquid. Furthermore, the system of highest efficiency is unexpectedly the simplest and cheaper combination that employs [Pd(η3-C3H5)Cl]2/PPh3 at only a 1 mol-% loading with pyrrolidine as the base and in the absence of a copper salt. The coupling of sterically and electronically deactivated bromides bearing different functional groups to ar…