Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

Georgy A. Filonenko; Elena Cosimi; Laurent Lefort; Matthew P. Conley; Christophe Copéret; Martin Lutz; Emiel J M Hensen; Evgeny A. Pidko

doi:10.1021/cs500720y

Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

Georgy A. Filonenko, Elena Cosimi, Laurent Lefort, Matthew P. Conley, Christophe Copéret, Martin Lutz, Emiel J M Hensen, Evgeny A. Pidko^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC-pincer complexes (Ru-CNC's) were prepared. Depending on the synthetic procedure, normal (1, 2) or mixed normal/abnormal NHC-complexes (3) are formed. In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity toward strong bases to yield dearomatized complex 7, which heterolytically activates H₂ to form the bis-hydrido complex 8. Finally, these Ru-CNC's are active in catalytic hydrogenation of CO₂ to formate salts, and unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.

Original language	English
Pages (from-to)	2667-2671
Number of pages	5
Journal	ACS Catalysis
Volume	4
Issue number	8
DOIs	https://doi.org/10.1021/cs500720y
Publication status	Published - 1 Jan 2014

Keywords

hydrogenation
metal-ligand cooperation
N-heterocyclic carbene
nitrile activation
ruthenium

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title = "Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties",

abstract = "Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC-pincer complexes (Ru-CNC's) were prepared. Depending on the synthetic procedure, normal (1, 2) or mixed normal/abnormal NHC-complexes (3) are formed. In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity toward strong bases to yield dearomatized complex 7, which heterolytically activates H2 to form the bis-hydrido complex 8. Finally, these Ru-CNC's are active in catalytic hydrogenation of CO2 to formate salts, and unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.",

keywords = "hydrogenation, metal-ligand cooperation, N-heterocyclic carbene, nitrile activation, ruthenium",

author = "Filonenko, {Georgy A.} and Elena Cosimi and Laurent Lefort and Conley, {Matthew P.} and Christophe Cop{\'e}ret and Martin Lutz and Hensen, {Emiel J M} and Pidko, {Evgeny A.}",

year = "2014",

month = jan,

day = "1",

doi = "10.1021/cs500720y",

language = "English",

volume = "4",

pages = "2667--2671",

journal = "ACS Catalysis",

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publisher = "American Chemical Society",

number = "8",

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TY - JOUR

T1 - Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

AU - Filonenko, Georgy A.

AU - Cosimi, Elena

AU - Lefort, Laurent

AU - Conley, Matthew P.

AU - Copéret, Christophe

AU - Lutz, Martin

AU - Hensen, Emiel J M

AU - Pidko, Evgeny A.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC-pincer complexes (Ru-CNC's) were prepared. Depending on the synthetic procedure, normal (1, 2) or mixed normal/abnormal NHC-complexes (3) are formed. In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity toward strong bases to yield dearomatized complex 7, which heterolytically activates H2 to form the bis-hydrido complex 8. Finally, these Ru-CNC's are active in catalytic hydrogenation of CO2 to formate salts, and unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.

AB - Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC-pincer complexes (Ru-CNC's) were prepared. Depending on the synthetic procedure, normal (1, 2) or mixed normal/abnormal NHC-complexes (3) are formed. In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity toward strong bases to yield dearomatized complex 7, which heterolytically activates H2 to form the bis-hydrido complex 8. Finally, these Ru-CNC's are active in catalytic hydrogenation of CO2 to formate salts, and unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols.

KW - hydrogenation

KW - metal-ligand cooperation

KW - N-heterocyclic carbene

KW - nitrile activation

KW - ruthenium

UR - http://www.scopus.com/inward/record.url?scp=84905455154&partnerID=8YFLogxK

U2 - 10.1021/cs500720y

DO - 10.1021/cs500720y

M3 - Article

AN - SCOPUS:84905455154

SN - 2155-5435

VL - 4

SP - 2667

EP - 2671

JO - ACS Catalysis

JF - ACS Catalysis

IS - 8

ER -

Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties

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Keywords

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