N,O-ligated Pd(ii) complexes for catalytic alcohol oxidation

2014 ◽  
Vol 4 (8) ◽  
pp. 2526-2534 ◽  
Author(s):  
Laura M. Dornan ◽  
Gráinne M. A. Clendenning ◽  
Mateusz B. Pitak ◽  
Simon J. Coles ◽  
Mark J. Muldoon
Keyword(s):  
Crystal Structure ◽  
Sulfonic Acid ◽  
Active Catalyst ◽  
Alcohol Oxidation ◽  
Secondary Alcohols ◽  
Reaction Conditions ◽  
Highly Active

The (HSA)Pd(OAc)2 complex (where HSA = 8-hydroxyquinoline-2-sulfonic acid) is a highly active catalyst for the oxidation of a range of secondary alcohols in 4–6 hours at a low loading of 0.5 mol%. The crystal structure has been obtained and the influence of reaction conditions on catalyst degradation was also examined.

Crystal structure of meso ‐substituted pyrazolyl porphyrin complexes and their highly active catalyst for oxidation of alkylbenzenes

2017 ◽  
Vol 32 (3) ◽  
pp. e4184 ◽  
Author(s):  
Yahong Yao ◽  
Yanxia Du ◽  
Jun Li ◽  
Chen Wang ◽  
Zengqi Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Active Catalyst ◽  
Highly Active

scholarly journals A rapid and efficient synthetic route to terminal arylacetylenes by tetrabutylammonium hydroxide- and methanol-catalyzed cleavage of 4-aryl-2-methyl-3-butyn-2-ols

2011 ◽  
Vol 7 ◽  
pp. 426-431 ◽  
Author(s):  
Jie Li ◽  
Pengcheng Huang
Keyword(s):  
Reaction Time ◽  
Active Catalyst ◽  
Catalyst System ◽  
Synthetic Route ◽  
Reaction Conditions ◽  
Tetrabutylammonium Hydroxide ◽  
Highly Active ◽  
Novel Catalyst ◽  
Usual Reaction

Tetrabutylammonium hydroxide with methanol as an additive was found to be a highly active catalyst for the cleavage of 4-aryl-2-methyl-3-butyn-2-ols. The reaction was performed at 55–75 °C and gave terminal arylacetylenes in good to excellent yields within several minutes. Compared with the usual reaction conditions (normally >110 °C, several hours), this novel catalyst system can dramatically decrease the reaction time under much milder conditions.

Hydrogen-Borrowing Amination of Secondary Alcohols Promoted by a (Cyclopentadienone)iron Complex

Synthesis ◽  
2019 ◽  
Vol 51 (18) ◽  
pp. 3545-3555 ◽  
Author(s):  
Xishan Bai ◽  
Francesco Aiolfi ◽  
Mattia Cettolin ◽  
Umberto Piarulli ◽  
Alberto Dal Corso ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Secondary Alcohol ◽  
Iron Complex ◽  
Aliphatic Amines ◽  
Primary Amines ◽  
Secondary Alcohols ◽  
Alcohol Group ◽  
Co Catalysts ◽  
Highly Active ◽  
Aromatic And Aliphatic Amines

Thanks to a highly active catalyst, the scope of the (cyclopentadienone)iron complex-promoted ‘hydrogen-borrowing’ (HB) amination has been expanded to secondary alcohols, which had previously been reported to react only in the presence of large amounts of co-catalysts. A range of cyclic and acyclic secondary alcohols were reacted with aromatic and aliphatic amines giving fair to excellent yields of the substitution products. The catalyst was also able to promote the cyclization of diols bearing a secondary alcohol group with primary amines to generate saturated N-heterocycles.

3DOM-LaSrCoFeO6−δ as a highly active catalyst for the thermal and photothermal reduction of CO2 with H2O to CH4

2016 ◽  
Vol 4 (34) ◽  
pp. 13155-13165 ◽  
Author(s):  
Minh Ngoc Ha ◽  
Guanzhong Lu ◽  
Zhifu Liu ◽  
Lichao Wang ◽  
Zhe Zhao
Keyword(s):  
Active Catalyst ◽  
Catalytic Performance ◽  
Thermal Reaction ◽  
Reaction Conditions ◽  
Highly Active ◽  
Reduction Of Co2

LSCF and 3DOM-LSCF catalysts can significantly improve the catalytic performance and 100% selectivity for the reduction of CO2 with H2O vapor to CH4 under thermal and photo-thermal reaction conditions.

Highly active catalyst for CO2 methanation derived from a metal organic framework template

2017 ◽  
Vol 5 (25) ◽  
pp. 12990-12997 ◽  
Author(s):  
R. Lippi ◽  
S. C. Howard ◽  
H. Barron ◽  
C. D. Easton ◽  
I. C. Madsen ◽  
...  
Keyword(s):  
Active Catalyst ◽  
Metal Organic Framework ◽  
Reaction Conditions ◽  
Co2 Methanation ◽  
Highly Active ◽  
Metal Organic ◽  
Organic Framework

MOF-derived nanocatalysts activated under reaction conditions display remarkable activity when compared to several controls.

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>

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