112176-16-6Relevant academic research and scientific papers
Enantioconvergent and Regioselective Synthesis of Allenylsilanes by Nickel-Catalyzed C(sp2)-C(sp3) Cross-Coupling Starting from Racemic α-Silylated Propargylic Bromides
Xu, Yan,Yi, Hong,Oestreich, Martin
, p. 2194 - 2197 (2021)
A direct synthesis of enantioenriched allenylsilanes from racemic α-silylated propargylic bromides by an enantioconvergent nickel-catalyzed cross-coupling is reported. The high regioselectivity is governed by the bulky silyl group, and the C(sp2)-C(sp3) bond formation occurs exclusively at the γ-position of the propargyl electrophile. The level of enantioselection induced by a chiral Pybox ligand is moderate.
Synthesis and properties of metal-ligand complexes with endohedral amine functionality
Johnson, Amber M.,Moshe, Orly,Gamboa, Ana S.,Langloss, Brian W.,Limtiaco, John F. K.,Larive, Cynthia K.,Hooley, Richard J.
, p. 9430 - 9442 (2011/11/04)
A series of tetracationic M2L4 palladium-pyridyl complexes with endohedral amine functionality have been synthesized. The complexes were analyzed by NMR techniques (including Diffusion NMR and 2D NOESY), electrospray ionization (ESI) mass spectrometry, and X-ray crystallography. The solid state analysis shows a large change in crystal morphology upon introduction of the endohedral amine groups, caused by deleterious interactions between the amines and the triflate counterions from the coordination process. Combination of different ligands allows analysis of ligand exchange rates via NMR analysis, with half-lives on the order of 3 h, independent of the donor properties of the ligand. Self-sorting behavior is observed, with more electron-rich ligands being favored. The amine-containing and extended complexes are strongly fluorescent, giving quantum yields of up to 83%.
