Selective Hydrogenation of Carboxylic Acids to Alcohols or Alkanes Employing a Heterogeneous Catalyst

ACS Catalysis ◽  
2017 ◽  
Vol 8 (2) ◽  
pp. 785-789 ◽  
Author(s):  
Johannes Ullrich ◽  
Bernhard Breit
Keyword(s):  
Heterogeneous Catalyst ◽  
Carboxylic Acids ◽  
Selective Hydrogenation

Efficient synthesis of pyrido[2,3-d]pyrimidine-7-carboxylic acids catalyzed by a TiO2/SiO2 nanocomposite in aqueous media at room temperature

2018 ◽  
Vol 73 (9) ◽  
pp. 641-645 ◽  
Author(s):  
Sepehr Sadegh-Samiei ◽  
Shahrzad Abdolmohammadi
Keyword(s):  
Heterogeneous Catalyst ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Aqueous Media ◽  
Reaction Times ◽  
Molar Ratio ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Moderate Reaction ◽  
Recyclable Heterogeneous Catalyst

AbstractA novel and efficient synthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids using a TiO2/SiO2 nanocomposite with a molar ratio of 1:1 as a recyclable heterogeneous catalyst is described. The desired products, five of which are new, are formed in short reaction times (2–3 h) with high to excellent yields (94%–98%) under very moderate reaction conditions (room temperature, aqueous media).

Pd(ii)/Zn co-catalyzed chemo-selective hydrogenation of α-methylene-γ-keto carboxylic acids

2019 ◽  
Vol 17 (8) ◽  
pp. 2174-2181 ◽  
Author(s):  
Xuexin Zhang ◽  
Yang Gao ◽  
Ronibala Devi Laishram ◽  
Kangkui Li ◽  
Yong Yang ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Selective Hydrogenation

Divergent synthesis of α-methyl-γ-keto carboxylic acids, α-methylcarboxylic acids, and lactones from α-methylene-γ-keto carboxylic acids.

An infrared study of selective hydrogenation of carboxylic acids to corresponding aldehydes over a ZrO2 catalyst: pivalic acid to 2,2-dimethylpropanal

1993 ◽  
Vol 17 (3-4) ◽  
pp. 309-317 ◽  
Author(s):  
Nan Ding ◽  
Junko Kondo ◽  
Ken ichi Maruya ◽  
Kazunari Domen ◽  
Toshiharu Yokoyama ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Selective Hydrogenation ◽  
Pivalic Acid ◽  
Infrared Study ◽  
Zro2 Catalyst

The reactivity of platinum hydrides in the selective hydrogenation of acetic acid over Pt-ReOx/TiO2 catalysts

2020 ◽  
Vol 20 (6) ◽  
pp. 426-432
Author(s):  
N. V. Makolkin ◽  
H. U. Kim ◽  
E. A. Paukshtis ◽  
J. Jae ◽  
B. S. Bal’zhinimaev
Keyword(s):  
Acetic Acid ◽  
Absorption Band ◽  
Electronic State ◽  
Carboxylic Acids ◽  
Selective Hydrogenation ◽  
High Reactivity ◽  
Absorption Bands ◽  
In Situ Drifts ◽  
High Frequencies

In situ DRIFTS was employed to investigate the reaction of hydrogen with supported subnanometer Pt-ReOx species that are active in the hydrogenation of carboxylic acids. Absorption bands of platinum hydrides in the region of 2025–2043 cm–1 were detected; high reactivity of the hydrides toward the adsorbed acetic acid was revealed. In the process, the absorption band of platinum hydride shifted to high frequencies and increased in intensity due to the influence of adjacent acetates on the electronic state of platinum. It was found that in a hydrogen medium the intensity of platinum hydride bands sharply increases after the adsorption of acetic acid and then gradually decreases owing to the reaction of the hydrides with surface acetates.

Lewis Acid Promoted Ruthenium(II)-Catalyzed Etherifications by Selective Hydrogenation of Carboxylic Acids/Esters

2015 ◽  
Vol 127 (17) ◽  
pp. 5285-5289 ◽  
Author(s):  
Yuehui Li ◽  
Christoph Topf ◽  
Xinjiang Cui ◽  
Kathrin Junge ◽  
Matthias Beller
Keyword(s):  
Carboxylic Acids ◽  
Lewis Acid ◽  
Selective Hydrogenation

Selective hydrogenation of amides to alcohols in water solvent over a heterogeneous CeO2-supported Ru catalyst

2018 ◽  
Vol 54 (54) ◽  
pp. 7503-7506 ◽  
Author(s):  
Masazumi Tamura ◽  
Susumu Ishikawa ◽  
Mii Betchaku ◽  
Yoshinao Nakagawa ◽  
Keiichi Tomishige
Keyword(s):  
Heterogeneous Catalyst ◽  
Reaction Temperature ◽  
Selective Hydrogenation ◽  
Ru Catalyst ◽  
Water Solvent ◽  
Selective Dissociation ◽  
Low Reaction Temperature

CeO2-supported Ru (Ru/CeO2) worked as an effective and reusable heterogeneous catalyst for the selective dissociation of the C–N bond in amides, particularly primary amides, with H2 in water solvent at low reaction temperature of 333 K.

The nature of active sites in Pt–ReO X /TiO 2 catalysts for selective hydrogenation of carboxylic acids to alcohols

2015 ◽  
Vol 24 (5) ◽  
pp. 646-654 ◽  
Author(s):  
Alexey Suknev ◽  
Vladimir Zaikovskii ◽  
Vasily Kaichev ◽  
Eugenii Paukshtis ◽  
Ekaterina Sadovskaya ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Selective Hydrogenation ◽  
Active Sites
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