Geometric and electronic effects in the selective hydrogenation of $alpha;, $beta;-unsaturated aldehydes over zeolite-supported metals

1991 ◽  
Vol 131 (2) ◽  
pp. 401-411 ◽  
Author(s):  
D BLACKMOND
Keyword(s):  
Selective Hydrogenation ◽  
Electronic Effects ◽  
Unsaturated Aldehydes ◽  
Alpha Beta ◽  
Supported Metals

Selective hydrogenation of unsaturated aldehydes over Pt nanoparticles promoted by the cooperation of steric and electronic effects

2018 ◽  
Vol 54 (8) ◽  
pp. 908-911 ◽  
Author(s):  
Hangyu Liu ◽  
Qingqing Mei ◽  
Shaopeng Li ◽  
Youdi Yang ◽  
YanYan Wang ◽  
...  
Keyword(s):  
Aspartic Acid ◽  
Selective Hydrogenation ◽  
Room Temperature ◽  
High Selectivity ◽  
Pt Nanoparticles ◽  
Electronic Effects ◽  
Unsaturated Alcohols ◽  
Unsaturated Aldehydes

The selective hydrogenation of α,β-unsaturated aldehydes to unsaturated alcohols can reach high selectivity and activity at room temperature using Pt nanoparticles immobilized on a non-porous Al2O3 support stabilized by aspartic acid.

New C-4-chiral 1,3-thiazolidine-2-thiones: excellent chiral auxiliaries for highly diastereo-controlled aldol-type reactions of acetic acid and .alpha.,.beta.-unsaturated aldehydes

1986 ◽  
Vol 51 (12) ◽  
pp. 2391-2393 ◽  
Author(s):  
Yoshimitsu Nagao ◽  
Yuichi Hagiwara ◽  
Toshio Kumagai ◽  
Masahito Ochiai ◽  
Takehisa Inoue ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Chiral Auxiliaries ◽  
Unsaturated Aldehydes ◽  
Alpha Beta

Aldehydes from dihydro-1,3-oxazines. II. Synthesis of .alpha.,.beta.-unsaturated aldehydes and their C-1 deuterated derivatives

1969 ◽  
Vol 91 (3) ◽  
pp. 764-765 ◽  
Author(s):  
Albert I. Meyers ◽  
Aiko Nabeya ◽  
H. Wayne Adickes ◽  
J. Michael Fitzpatrick ◽  
G. Ray Malone ◽  
...  
Keyword(s):  
Unsaturated Aldehydes ◽  
Alpha Beta

scholarly journals High-Active Metallic-Activated Carbon Catalysts for Selective Hydrogenation

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Nicolás Carrara ◽  
Carolina Betti ◽  
Fernando Coloma-Pascual ◽  
María Cristina Almansa ◽  
Laura Gutierrez ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Selective Hydrogenation ◽  
Nickel Catalysts ◽  
Metallic Phase ◽  
Hydrogen Chemisorption ◽  
Electronic Effects ◽  
X Ray ◽  
Mild Conditions ◽  
Temperature Programmed ◽  
Carbon Catalysts

A series of low-loaded metallic-activated carbon catalysts were evaluated during the selective hydrogenation of a medium-chain alkyne under mild conditions. The catalysts and support were characterized by ICP, hydrogen chemisorption, Raman spectroscopy, temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR micro-ATR), transmission electronic microscopy (TEM), and X-ray photoelectronic spectroscopy (XPS). When studying the effect of the metallic phase, the catalysts were active and selective to the alkene synthesis. NiCl/C was the most active and selective catalytic system. Besides, when the precursor salt was evaluated, PdN/C was more active and selective than PdCl/C. Meanwhile, alkyne is present in the reaction media, and geometrical and electronic effects favor alkene desorption and so avoid their overhydrogenation to the alkane. Under mild conditions, nickel catalysts are considerably more active and selective than the Lindlar catalyst.

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