533882-35-8Relevant academic research and scientific papers
A Bifunctional MOF Catalyst Containing Metal–Phosphine and Lewis Acidic Active Sites
Prasad, Ram R. R.,Dawson, Daniel M.,Cox, Paul A.,Ashbrook, Sharon E.,Wright, Paul A.,Clarke, Matthew L.
supporting information, p. 15309 - 15318 (2018/09/27)
Post-synthetic modification of the hafnium metal–organic framework MOF-808(Hf) to include triarylphosphine ligands is reported. Sulfonated phenylphosphines are incorporated without oxidation to give a “MOF ligand” that can complex late transition metals such as Ir and Rh to give a bifunctional catalyst containing both metal–phosphine complexes and the Lewis acidic framework hafnium metal sites. The metallated phosphine-bearing MOFs act as fully heterogeneous bifunctional catalysts for tandem reductive amination and hydroaminomethylation reactions.
Zinc-catalyzed reduction of imines by triethylsilane
Kumar, K. Anil,Sreelekha,Shivakumara,Prakasha,Gowda, D. Channe
experimental part, p. 1332 - 1341 (2009/10/09)
Low-cost zinc is employed as a catalyst along with triethylsilane (TES) in a simple, straightforward, chemoselective reduction of various aldimines and ketimines to the corresponding secondary amines at room temperature and pressure.
Molecular tweezers for hydrogen: Synthesis, characterization, and reactivity
Sumerin, Victor,Schulz, Felix,Atsumi, Michiko,Wang, Cong,Nieger, Martin,Leskelae, Markku,Repo, Timo,Pyykkoe, Pekka,Rieger, Bernhard
supporting information; experimental part, p. 14117 - 14119 (2009/03/11)
The first ansa-aminoborane N-TMPN-CH2C6H4B(C6F5)2 (where TMPNH is 2,2,6,6-tetramethylpiperidinyl) which is able to reversibly activate H2 through an intramolecular mechanism is synthesized. This new substance makes use of the concept of molecular tweezers where the active N and B centers are located close to each other so that one H2 molecule can fit in this void and be activated. Because of the fixed geometry of this ansa-ammonium-borate it forms a short N-H...H-B dihydrogen bond of 1.78 A as determined by X-ray analysis. Therefore, the bound hydrogen can be released above 100 °C. In addition, the short H...H contact and the N-H...H (154°) and B-H...H (125°) angles show that the dihydrogen interaction in N-TMPNH-CH2C6H4BH(C6F5)2 is partially covalent in nature. As a basis for discussing the mechanism, quantum chemical calculations are performed and it is found that the energy needed for splitting H2 can arise from the Coulomb attraction between the resulting ionic fragments, or "Coulomb pays for Heitler-London". The air- and moisture-stable N-TMPNH-CH2C6H4BH(C6F5)2 is employed in the catalytic reduction of nonsterically demanding imines and enamines under mild conditions (110 °C and 2 atm of H2) to give the corresponding amines in high yields. Copyright
