Transfer-dehydrogenation of secondary alcohols catalyzed by manganese NNN-pincer complexes

2019 ◽  
Vol 55 (94) ◽  
pp. 14143-14146 ◽  
Author(s):  
Svenja Budweg ◽  
Kathrin Junge ◽  
Matthias Beller
Keyword(s):  
Pincer Complexes ◽  
Pincer Ligands ◽  
Secondary Alcohols ◽  
Catalytic Systems

Novel catalytic systems based on pentacarbonylmanganese bromide and stable NNN-pincer ligands are presented for the transfer-dehydrogenation of secondary alcohols to give the corresponding ketones in good to excellent isolated yields.

scholarly journals Construction of a (NNN)Ru-Incorporated Porous Organic Polymer with High Catalytic Activity for β-Alkylation of Secondary Alcohols with Primary Alcohols

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 231
Author(s):  
Yao Cui ◽  
Jixian Wang ◽  
Lei Yu ◽  
Ying Xu ◽  
David J. Young ◽  
...  
Keyword(s):  
Functional Group ◽  
Catalytic Efficiency ◽  
Organic Polymer ◽  
Pincer Ligands ◽  
High Catalytic Activity ◽  
Secondary Alcohols ◽  
Primary Alcohols ◽  
Solid Supports ◽  
Porous Organic Polymer ◽  
Heterogeneous And Homogeneous Catalysis

Solid supports functionalized with molecular metal catalysts combine many of the advantages of heterogeneous and homogeneous catalysis. A (NNN)Ru-incorporated porous organic polymer (POP-bp/bbpRuCl3) exhibited high catalytic efficiency and broad functional group tolerance in the C–C cross-coupling of secondary and primary alcohols to give β-alkylated secondary alcohols. This catalyst demonstrated excellent durability during successive recycling without leaching of Ru which is ascribed to the strong binding of the pincer ligands to the metal ions.

Squeezing Bi: PNP and P2N3 pincer complexes of bismuth

2020 ◽  
Vol 49 (45) ◽  
pp. 16072-16076 ◽  
Author(s):  
Marcus B. Kindervater ◽  
Toren Hynes ◽  
Katherine M. Marczenko ◽  
Saurabh S. Chitnis
Keyword(s):  
Pincer Complexes ◽  
Pincer Ligands

Stable neutral and highly-reactive cationic Bi complexes featuring NNN and PNP pincer ligands are debuted.

Cationic Tetra- and Pentacoordinate Complexes of Nickel Based on POCN- and POCOP -Type Pincer Ligands: Synthesis, Characterization, and Ligand Exchange Studies

2021 ◽  
Author(s):  
Naser Rahimi ◽  
Davit Zargarian
Keyword(s):  
Ligand Exchange ◽  
Pincer Complexes ◽  
Pincer Ligands ◽  
Acetonitrile Solutions

Stirring acetonitrile solutions of the charge-neutral pincer complexes (POCN)NiBr (1, POCN= ΚP,ΚC,ΚN-{2-(i-Pr)2PO,6-CH2{c-N(CH2)5}-C6H3) and (POCOP)NiBr (2, POCOP= ΚP,ΚC,ΚP'-2,6-(i-Pr2PO)2}C6H3) with AgSbF6 facilitates Br- abstraction to give the corresponding cationic acetonitrile adducts [(POCN)Ni(NCMe)]+,...

scholarly journals Group 11 Pincer Oxazoline Complexes

2021 ◽  
Author(s):  
Mahroo T. Seighalani
Keyword(s):  
Point Group ◽  
Diffraction Method ◽  
Binding Mode ◽  
Group Symmetry ◽  
Pincer Complexes ◽  
Pincer Ligands ◽  
Henry Reaction ◽  
X Ray Diffraction ◽  
Pincer Ligand ◽  
Nitroaldol Reaction

The synthesis and characterization of new copper pincer complexes via cyclometallation of potentially anionic pincer ligands with C1 point group symmetry is reported. All of these complexes have been characterized by single crystal X-ray diffraction method, which confirms the proposed tridentate binding mode of pincer ligand and the formation of an amido N-Cu bond. The reactivity of two of the complexes was investigated towards C-C bond formation reaction, notably the Henry reaction. One of the complexes, which was derived from the achiral pincer ligand, is shown to be a suitable catalyst for the Henry reaction under the standard conditions. The Henry or nitroaldol reaction is one of the organic reactions which affords a C-C bond. The product of this reaction is a β-nitro alcohol which is formed by addition of a nitroalkane to a carbonyl compound.

scholarly journals Asymmetric Bis-PNP Pincer Complexes of Zirconium and Hafnium - a Measure of Hemilability

2020 ◽  
Author(s):  
Celia Idelson ◽  
Leah Webster ◽  
Tobias Krämer ◽  
Mark Chadwick
Keyword(s):  
Nmr Spectroscopy ◽  
Dft Calculations ◽  
Energy Barrier ◽  
Pincer Complexes ◽  
Pincer Ligands ◽  
Direct Contrast ◽  
Vt Nmr

Asymmetrically-bound pyrrollide-based bis-PNP pincer complexes of zirconium and hafnium<br>have been formed. The [κ2-PNPPh][κ3-PNPPh]MCl2 species are in direct contrast to previous<br>zirconium PNP pincer complexes. The pincer ligands are fluxional in their binding and the<br>energy barrier for exchange has been approximated using VT-NMR spectroscopy and the<br>result validated by DFT calculations.

scholarly journals Structural diversity of halocarbonyl molybdenum and tungsten PNP pincer complexes through ligand modifications

2016 ◽  
Vol 45 (35) ◽  
pp. 13834-13845 ◽  
Author(s):  
Sara R. M. M. de Aguiar ◽  
Berthold Stöger ◽  
Ernst Pittenauer ◽  
Günter Allmaier ◽  
Luis F. Veiros ◽  
...  
Keyword(s):  
Comparative Study ◽  
Structural Diversity ◽  
Pincer Complexes ◽  
Pincer Ligands ◽  
And Tungsten

A comparative study of a series of halocarbonyl Mo(ii) and W(ii) complexes featuring PNP pincer ligands based on a 2,6-diaminopyridine scaffold is presented.

scholarly journals Reversible catalytic dehydrogenation of alcohols for energy storage

2015 ◽  
Vol 112 (6) ◽  
pp. 1687-1692 ◽  
Author(s):  
Peter J. Bonitatibus ◽  
Sumit Chakraborty ◽  
Mark D. Doherty ◽  
Oltea Siclovan ◽  
William D. Jones ◽  
...  
Keyword(s):  
Energy Storage ◽  
Fuel Cell ◽  
Homogeneous Catalysis ◽  
Partial Oxidation ◽  
Catalytic Reaction ◽  
Pincer Complexes ◽  
Catalytic Dehydrogenation ◽  
Secondary Alcohols ◽  
Iridium Complexes ◽  
Primary Alcohols

Reversibility of a dehydrogenation/hydrogenation catalytic reaction has been an elusive target for homogeneous catalysis. In this report, reversible acceptorless dehydrogenation of secondary alcohols and diols on iron pincer complexes and reversible oxidative dehydrogenation of primary alcohols/reduction of aldehydes with separate transfer of protons and electrons on iridium complexes are shown. This reactivity suggests a strategy for the development of reversible fuel cell electrocatalysts for partial oxidation (dehydrogenation) of hydroxyl-containing fuels.

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