Modified mesoporous silicate MCM-41 materials: immobilised perruthenate—a new highly active heterogeneous oxidation catalyst for clean organic synthesis using molecular oxygen

1999 ◽  
pp. 1907-1908 ◽  
Author(s):  
Andrew Bleloch ◽  
Brian F. G. Johnson ◽  
Steven V. Ley ◽  
Adam J. Price ◽  
Douglas S. Shephard ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Organic Synthesis ◽  
Oxidation Catalyst ◽  
Heterogeneous Oxidation ◽  
Mesoporous Silicate ◽  
Highly Active ◽  
Mcm 41

ChemInform Abstract: Modified Mesoporous Silicate MCM-41 Materials: Immobilized Perruthenate - A New Highly Active Heterogeneous Oxidation Catalyst for Clean Organic Synthesis Using Molecular Oxygen.

ChemInform ◽  
2010 ◽  
Vol 31 (4) ◽  
pp. no-no
Author(s):  
Andrew Bleloch ◽  
Brian F. G. Johnson ◽  
Steven V. Ley ◽  
Adam J. Price ◽  
Douglas S. Shephard ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Organic Synthesis ◽  
Oxidation Catalyst ◽  
Heterogeneous Oxidation ◽  
Mesoporous Silicate ◽  
Highly Active ◽  
Mcm 41

Urea-Catalyzed Functionalization of Unactivated C–H Bonds

2020 ◽  
Author(s):  
Alex L. Bagdasarian ◽  
Stasik Popov ◽  
Benjamin Wigman ◽  
Wenjing Wei ◽  
woojin lee ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Organic Synthesis ◽  
High Energy ◽  
Acid Catalysts ◽  
Potential Utility ◽  
New Paradigm ◽  
Lewis Acid Catalysts ◽  
Reaction Conditions ◽  
Highly Active ◽  
Acidic Nature

Herein we report the 3,5bistrifluoromethylphenyl urea-catalyzed functionalization of unactivated C–H bonds. In this system, the urea catalyst mediates the formation of high-energy vinyl carbocations that undergo facile C–H insertion and Friedel–Crafts reactions. We introduce a new paradigm for these privileged scaffolds where the combination of hydrogen bonding motifs and strong bases affords highly active Lewis acid catalysts capable of ionizing strong C–O bonds. Despite the highly Lewis acidic nature of these catalysts that enables triflate abstraction from sp<sup>2</sup> carbons, these newly found reaction conditions allow for the formation of heterocycles and tolerate highly Lewis basic heteroaromatic substrates. This strategy showcases the potential utility of dicoordinated vinyl carbocations in organic synthesis.<br>

Urea-Catalyzed Functionalization of Unactivated C–H Bonds

2020 ◽  
Author(s):  
Alex L. Bagdasarian ◽  
Stasik Popov ◽  
Benjamin Wigman ◽  
Wenjing Wei ◽  
woojin lee ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Organic Synthesis ◽  
High Energy ◽  
Acid Catalysts ◽  
Potential Utility ◽  
New Paradigm ◽  
Lewis Acid Catalysts ◽  
Reaction Conditions ◽  
Highly Active ◽  
Acidic Nature

Herein we report the 3,5bistrifluoromethylphenyl urea-catalyzed functionalization of unactivated C–H bonds. In this system, the urea catalyst mediates the formation of high-energy vinyl carbocations that undergo facile C–H insertion and Friedel–Crafts reactions. We introduce a new paradigm for these privileged scaffolds where the combination of hydrogen bonding motifs and strong bases affords highly active Lewis acid catalysts capable of ionizing strong C–O bonds. Despite the highly Lewis acidic nature of these catalysts that enables triflate abstraction from sp<sup>2</sup> carbons, these newly found reaction conditions allow for the formation of heterocycles and tolerate highly Lewis basic heteroaromatic substrates. This strategy showcases the potential utility of dicoordinated vinyl carbocations in organic synthesis.<br>

MCM-41-supported bidentate phosphine palladium(0) complex: a highly active and recyclable catalyst for the Sonogashira reaction of aryl iodides

Tetrahedron ◽  
2007 ◽  
Vol 63 (22) ◽  
pp. 4642-4647 ◽  
Author(s):  
Mingzhong Cai ◽  
Junchao Sha ◽  
Qiuhua Xu
Keyword(s):  
Recyclable Catalyst ◽  
Sonogashira Reaction ◽  
Highly Active ◽  
Aryl Iodides ◽  
Bidentate Phosphine ◽  
Mcm 41

Aqueous Medium Ullmann Reaction over a Novel Pd/Ph—Al-MCM-41 as a New Route of Clean Organic Synthesis.

ChemInform ◽  
2007 ◽  
Vol 38 (26) ◽  
Author(s):  
Hexing Li ◽  
Jia Chen ◽  
Ying Wan ◽  
Wei Chai ◽  
Fang Zhang ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Organic Synthesis ◽  
Ullmann Reaction ◽  
Mcm 41

Modified Mesoporous Silicate MCM-41 for Zinc Ion Adsorption: Synthesis, Characterization and Its Adsorption Behavior

2009 ◽  
Vol 27 (11) ◽  
pp. 2171-2174 ◽  
Author(s):  
Hamid Sepehrian ◽  
Syed Waqif-husain ◽  
Farrokh Rakhshanderu ◽  
Leila Kamel
Keyword(s):  
Zinc Ion ◽  
Adsorption Behavior ◽  
Ion Adsorption ◽  
Mesoporous Silicate ◽  
Mcm 41

Amino-TEMPO Grafted on Magnetic Multi-Walled Nanotubes: An Efficient and Recyclable Heterogeneous Oxidation Catalyst

2018 ◽  
Vol 2019 (6) ◽  
pp. 1405-1412 ◽  
Author(s):  
Cristian Gambarotti ◽  
Hans-René Bjørsvik
Keyword(s):  
Oxidation Catalyst ◽  
Heterogeneous Oxidation

Selective Catalytic Reduction of NOxin Lean Burn Engine Exhaust by Highly Active Pt Supported on V-impregnated MCM-41

2002 ◽  
Vol 31 (2) ◽  
pp. 246-247 ◽  
Author(s):  
Jong Yeol Jeon ◽  
Hee Young Kim ◽  
Seong Ihl Woo
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Lean Burn ◽  
Engine Exhaust ◽  
Highly Active ◽  
Mcm 41

scholarly journals Development of Ruthenium—Hydroxyapatite-Encapsulated Superparamagnetic γ-Fe2O3 Nanocrystallites as an Efficient Oxidation Catalyst by Molecular Oxygen.

ChemInform ◽  
2007 ◽  
Vol 38 (24) ◽  
Author(s):  
Kohsuke Mori ◽  
Satoko Kanai ◽  
Takayoshi Hara ◽  
Tomoo Mizugaki ◽  
Kohki Ebitani ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Oxidation Catalyst

EXAFS analysis of a chiral alkene polymerisation catalyst incorporated in the mesoporous silicate MCM-41

1997 ◽  
pp. 1905 ◽  
Author(s):  
Stephen O’Brien ◽  
Jonathan Tudor ◽  
Stephen O’Brien ◽  
Jonathan Tudor ◽  
Thomas Maschmeyer
Keyword(s):  
Exafs Analysis ◽  
Mesoporous Silicate ◽  
Mcm 41
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