Synthesis of a new class of unsymmetrical PCP′ pincer ligands and their palladium (II) complexes: X-ray structure determination of PdCl{C6H3-2-CH2PPh2-6-CH2PBut2}

Phosphine Ligands in the Palladium‐Catalysed Methoxycarbonylation of Ethene: Insights into the Catalytic Cycle through an HP NMR Spectroscopic Study

“…BH 3 (27) gave the boron-protected bidentate phosphine ligands [23][24][25][26]. [61,62] Deboronation of the phosphines 23-26 was achieved by the addition of an excess of tetrafluoroboric acid to give an in situ prepared phosphonium salt that was then reduced to the desired phosphine by the addition of potassium hydroxide.…”

Facile synthesis of achiral and chiral PCN pincer palladium(II) complexes and their application in the Suzuki and copper-free Sonogashira cross-coupling reactions

“…Taking these results into account, it seems very interesting to develop hybrid, non-symmetrical YCY 0 pincer Pd complexes such as PCN type since different donors (''hard" N and ''soft" P in PCN pincers) may provide a better tuning of the catalytic properties or give unique reactivity. By contrast, the synthesis and applications of non-symmetrical pincer Pd complexes have less often been reported [25][26][27][28][29][30]. This is partly because their preparation is a considerable challenge, which is laborious and requires a series of steps to introduce different donors.…”

An unprecedented bonding mode for potassium within a PCP-pincer palladium hydride–K-Selectride® complex

“…The stability imparted by these trans-spanning pincer ligands have been shown to be highly effective in preparing tridentate complexes of transition metals, including square-planar, d 8 metal species. More specifically, the socalled ''PCP" pincer ligands have attracted a great deal of attention for their use in a variety of catalytic reactions, as exemplified by recent advances in alkane dehydrogenation [6][7][8][9][10][11], olefin metathesis [12], Heck reaction chemistry [4,[13][14][15][16], and stereospecific Aldol condensations [17]. The naming of these ligands as ''PCP" follows the typical convention of listing the atoms using points of attachment to the metal.…”