85617-56-7Relevant academic research and scientific papers
Aryltrimethylammonium Tetrafluoroborates in Nickel-Catalyzed C–P Bond-Forming Reactions
Li, Chun Jing
, p. 954 - 960 (2021/07/22)
Abstract: The first nickel-catalyzed phosphorylation of aryltrimethylammonium tetrafluoroborates with the formation of C–P bond instead of C–N has been developed. Starting from easily available and inexpensive aromatic amines, a variety of important arylphosphonates have been synthesized in moderate to excellent yields.
Expedient Synthetic Identification of a P-Stereogenic Ligand Motif for the Palladium-Catalyzed Preparation of Isotactic Polar Polypropylenes
Nozaki, Kyoko,Seidel, Falk William,Tomizawa, Izumi
supporting information, p. 22591 - 22601 (2020/10/09)
The iso-specific statistical copolymerization of unprotected polar monomers with propylene remains a grand challenge in the field of polymer chemistry. Current research is hampered because only a single natural-product-derived dimenthylphosphine-motif is known to allow for the preparation of moderately isotactic polypropylene copolymers. To overcome this structural limitation, we developed time-efficient synthetic methods that facilitate P-donor ligand development. The strength of these methods was demonstrated with preparation of twenty-five new P-stereogenic phosphine/sulfonate- and bisphosphine-monoxide-type palladium catalysts, which could typically be developed in parallel. A lead candidate was identified for iso-specific propylene polymerization. The best-performing catalysts utilizing the P-stereogenic donor motif achieved triad isotacticities of up to mm=0.75—the highest value within those reported for group 10 metal catalysts—for the homo- and copolymerization of propylene with unprotected polar monomers at an industrially relevant temperature of 50 °C.
Ruthenium-catalyzed ortho -alkenylation of phenylphosphine oxides through regio- and stereoselective alkyne insertion into C-H bonds
Itoh, Masaki,Hashimoto, Yuto,Hirano, Koji,Satoh, Tetsuya,Miura, Masahiro
, p. 8098 - 8104 (2013/09/12)
Direct ortho-substitution took place efficiently upon treatment of tri-, di-, and monoarylphosphine oxides with internal alkynes in the presence of a ruthenium catalyst to produce (o-alkenylphenyl)phosphine oxides regio- and stereoselectively. Chemoselective reduction of a product gave the corresponding (o-alkenylphenyl)phosphine, which may be useful as a ligand for transition metals.
The Di-t-butylphosphinyl Directed ortho Metalation Group. Synthesis of hindered dialkylarylphosphines
Gray, Matthew,Chapell, Brian J.,Felding, Jakob,Taylor, Nicholas J.,Snieckus, Victor
, p. 422 - 424 (2007/10/03)
Using the new P(O)tBu2 Directed Metalation Group, a variety of ortho-substituted aryl di-t-butylphenylphosphine oxides (2a-k) have been prepared, its relative metalation ability has been established, and reduction and homocoupling products (Scheme 4) have been obtained.
